summaryrefslogtreecommitdiff
path: root/m68k_to_x86.c
diff options
context:
space:
mode:
authorMichael Pavone <pavone@retrodev.com>2014-03-02 16:34:29 -0800
committerMichael Pavone <pavone@retrodev.com>2014-03-02 16:34:29 -0800
commit48d6afdd1c9aaafc5b8ce59c584e360d89571a5b (patch)
tree2974a8819a2c80d7fc0ebc2e71b9a8e1370863fe /m68k_to_x86.c
parent8664df5a5d2870c67036666b66ce0d2f9fcdd1eb (diff)
Initial stab at separating the generic parts of the 68K core from the host-cpu specific parts.
Diffstat (limited to 'm68k_to_x86.c')
-rw-r--r--m68k_to_x86.c4626
1 files changed, 0 insertions, 4626 deletions
diff --git a/m68k_to_x86.c b/m68k_to_x86.c
deleted file mode 100644
index 295ff8e..0000000
--- a/m68k_to_x86.c
+++ /dev/null
@@ -1,4626 +0,0 @@
-/*
- Copyright 2013 Michael Pavone
- This file is part of BlastEm.
- BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
-*/
-#include "gen_x86.h"
-#include "m68k_core.h"
-#include "68kinst.h"
-#include "mem.h"
-#include "backend.h"
-#include <stdio.h>
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-
-#define BUS 4
-#define PREDEC_PENALTY 2
-
-#define CYCLES RAX
-#define LIMIT RBP
-#define CONTEXT RSI
-#define SCRATCH1 RCX
-
-#ifdef X86_64
-#define SCRATCH2 RDI
-#else
-#define SCRATCH2 RBX
-#endif
-
-enum {
- FLAG_X,
- FLAG_N,
- FLAG_Z,
- FLAG_V,
- FLAG_C
-};
-
-char disasm_buf[1024];
-
-m68k_context * sync_components(m68k_context * context, uint32_t address);
-
-void m68k_invalid();
-void bcd_add();
-void bcd_sub();
-
-
-void set_flag(m68k_options * opts, uint8_t val, uint8_t flag)
-{
- if (opts->flag_regs[flag] >= 0) {
- mov_ir(&opts->gen.code, val, opts->flag_regs[flag], SZ_B);
- } else {
- int8_t offset = offsetof(m68k_context, flags) + flag;
- if (offset) {
- mov_irdisp(&opts->gen.code, val, opts->gen.context_reg, offset, SZ_B);
- } else {
- mov_irind(&opts->gen.code, val, opts->gen.context_reg, SZ_B);
- }
- }
-}
-
-void set_flag_cond(m68k_options *opts, uint8_t cond, uint8_t flag)
-{
- if (opts->flag_regs[flag] >= 0) {
- setcc_r(&opts->gen.code, cond, opts->flag_regs[flag]);
- } else {
- int8_t offset = offsetof(m68k_context, flags) + flag;
- if (offset) {
- setcc_rdisp(&opts->gen.code, cond, opts->gen.context_reg, offset);
- } else {
- setcc_rind(&opts->gen.code, cond, opts->gen.context_reg);
- }
- }
-}
-
-void check_flag(m68k_options *opts, uint8_t flag)
-{
- if (opts->flag_regs[flag] >= 0) {
- cmp_ir(&opts->gen.code, 0, opts->flag_regs[flag], SZ_B);
- } else {
- cmp_irdisp(&opts->gen.code, 0, opts->gen.context_reg, offsetof(m68k_context, flags) + flag, SZ_B);
- }
-}
-
-void flag_to_reg(m68k_options *opts, uint8_t flag, uint8_t reg)
-{
- if (opts->flag_regs[flag] >= 0) {
- mov_rr(&opts->gen.code, opts->flag_regs[flag], reg, SZ_B);
- } else {
- int8_t offset = offsetof(m68k_context, flags) + flag;
- if (offset) {
- mov_rdispr(&opts->gen.code, opts->gen.context_reg, offset, reg, SZ_B);
- } else {
- mov_rindr(&opts->gen.code, opts->gen.context_reg, reg, SZ_B);
- }
- }
-}
-
-void reg_to_flag(m68k_options *opts, uint8_t reg, uint8_t flag)
-{
- if (opts->flag_regs[flag] >= 0) {
- mov_rr(&opts->gen.code, reg, opts->flag_regs[flag], SZ_B);
- } else {
- int8_t offset = offsetof(m68k_context, flags) + flag;
- if (offset) {
- mov_rrdisp(&opts->gen.code, reg, opts->gen.context_reg, offset, SZ_B);
- } else {
- mov_rrind(&opts->gen.code, reg, opts->gen.context_reg, SZ_B);
- }
- }
-}
-
-void flag_to_flag(m68k_options *opts, uint8_t flag1, uint8_t flag2)
-{
- code_info *code = &opts->gen.code;
- if (opts->flag_regs[flag1] >= 0 && opts->flag_regs[flag2] >= 0) {
- mov_rr(code, opts->flag_regs[flag1], opts->flag_regs[flag2], SZ_B);
- } else if(opts->flag_regs[flag1] >= 0) {
- mov_rrdisp(code, opts->flag_regs[flag1], opts->gen.context_reg, offsetof(m68k_context, flags) + flag2, SZ_B);
- } else if (opts->flag_regs[flag2] >= 0) {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, flags) + flag1, opts->flag_regs[flag2], SZ_B);
- } else {
- push_r(code, opts->gen.scratch1);
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, flags) + flag1, opts->gen.scratch1, SZ_B);
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, offsetof(m68k_context, flags) + flag2, SZ_B);
- pop_r(code, opts->gen.scratch1);
- }
-}
-
-void flag_to_carry(m68k_options * opts, uint8_t flag)
-{
- if (opts->flag_regs[flag] >= 0) {
- bt_ir(&opts->gen.code, 0, opts->flag_regs[flag], SZ_B);
- } else {
- bt_irdisp(&opts->gen.code, 0, opts->gen.context_reg, offsetof(m68k_context, flags) + flag, SZ_B);
- }
-}
-
-void or_flag_to_reg(m68k_options *opts, uint8_t flag, uint8_t reg)
-{
- if (opts->flag_regs[flag] >= 0) {
- or_rr(&opts->gen.code, opts->flag_regs[flag], reg, SZ_B);
- } else {
- or_rdispr(&opts->gen.code, opts->gen.context_reg, offsetof(m68k_context, flags) + flag, reg, SZ_B);
- }
-}
-
-void xor_flag_to_reg(m68k_options *opts, uint8_t flag, uint8_t reg)
-{
- if (opts->flag_regs[flag] >= 0) {
- xor_rr(&opts->gen.code, opts->flag_regs[flag], reg, SZ_B);
- } else {
- xor_rdispr(&opts->gen.code, opts->gen.context_reg, offsetof(m68k_context, flags) + flag, reg, SZ_B);
- }
-}
-
-void xor_flag(m68k_options *opts, uint8_t val, uint8_t flag)
-{
- if (opts->flag_regs[flag] >= 0) {
- xor_ir(&opts->gen.code, val, opts->flag_regs[flag], SZ_B);
- } else {
- xor_irdisp(&opts->gen.code, val, opts->gen.context_reg, offsetof(m68k_context, flags) + flag, SZ_B);
- }
-}
-
-void cmp_flags(m68k_options *opts, uint8_t flag1, uint8_t flag2)
-{
- code_info *code = &opts->gen.code;
- if (opts->flag_regs[flag1] >= 0 && opts->flag_regs[flag2] >= 0) {
- cmp_rr(code, opts->flag_regs[flag1], opts->flag_regs[flag2], SZ_B);
- } else if(opts->flag_regs[flag1] >= 0 || opts->flag_regs[flag2] >= 0) {
- if (opts->flag_regs[flag2] >= 0) {
- uint8_t tmp = flag1;
- flag1 = flag2;
- flag2 = tmp;
- }
- cmp_rrdisp(code, opts->flag_regs[flag1], opts->gen.context_reg, offsetof(m68k_context, flags) + flag2, SZ_B);
- } else {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, flags) + flag1, opts->gen.scratch1, SZ_B);
- cmp_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, offsetof(m68k_context, flags) + flag2, SZ_B);
- }
-}
-
-int8_t native_reg(m68k_op_info * op, m68k_options * opts)
-{
- if (op->addr_mode == MODE_REG) {
- return opts->dregs[op->params.regs.pri];
- }
- if (op->addr_mode == MODE_AREG) {
- return opts->aregs[op->params.regs.pri];
- }
- return -1;
-}
-
-//must be called with an m68k_op_info that uses a register
-size_t reg_offset(m68k_op_info *op)
-{
- if (op->addr_mode == MODE_REG) {
- return offsetof(m68k_context, dregs) + sizeof(uint32_t) * op->params.regs.pri;
- }
- return offsetof(m68k_context, aregs) + sizeof(uint32_t) * op->params.regs.pri;
-}
-
-void print_regs_exit(m68k_context * context)
-{
- printf("XNZVC\n%d%d%d%d%d\n", context->flags[0], context->flags[1], context->flags[2], context->flags[3], context->flags[4]);
- for (int i = 0; i < 8; i++) {
- printf("d%d: %X\n", i, context->dregs[i]);
- }
- for (int i = 0; i < 8; i++) {
- printf("a%d: %X\n", i, context->aregs[i]);
- }
- exit(0);
-}
-
-void m68k_read_size(m68k_options *opts, uint8_t size)
-{
- switch (size)
- {
- case OPSIZE_BYTE:
- call(&opts->gen.code, opts->read_8);
- break;
- case OPSIZE_WORD:
- call(&opts->gen.code, opts->read_16);
- break;
- case OPSIZE_LONG:
- call(&opts->gen.code, opts->read_32);
- break;
- }
-}
-
-void m68k_write_size(m68k_options *opts, uint8_t size)
-{
- switch (size)
- {
- case OPSIZE_BYTE:
- call(&opts->gen.code, opts->write_8);
- break;
- case OPSIZE_WORD:
- call(&opts->gen.code, opts->write_16);
- break;
- case OPSIZE_LONG:
- call(&opts->gen.code, opts->write_32_highfirst);
- break;
- }
-}
-
-void translate_m68k_src(m68kinst * inst, x86_ea * ea, m68k_options * opts)
-{
- code_info *code = &opts->gen.code;
- int8_t reg = native_reg(&(inst->src), opts);
- uint8_t sec_reg;
- int32_t dec_amount,inc_amount;
- if (reg >= 0) {
- ea->mode = MODE_REG_DIRECT;
- if (inst->dst.addr_mode == MODE_AREG && inst->extra.size == OPSIZE_WORD) {
- movsx_rr(code, reg, opts->gen.scratch1, SZ_W, SZ_D);
- ea->base = opts->gen.scratch1;
- } else {
- ea->base = reg;
- }
- return;
- }
- switch (inst->src.addr_mode)
- {
- case MODE_REG:
- case MODE_AREG:
- //We only get one memory parameter, so if the dst operand is a register in memory,
- //we need to copy this to a temp register first
- reg = native_reg(&(inst->dst), opts);
- if (reg >= 0 || inst->dst.addr_mode == MODE_UNUSED || !(inst->dst.addr_mode == MODE_REG || inst->dst.addr_mode == MODE_AREG)
- || inst->op == M68K_EXG) {
-
- ea->mode = MODE_REG_DISPLACE8;
- ea->base = opts->gen.context_reg;
- ea->disp = reg_offset(&(inst->src));
- } else {
- if (inst->dst.addr_mode == MODE_AREG && inst->extra.size == OPSIZE_WORD) {
- movsx_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, inst->extra.size);
- }
- ea->mode = MODE_REG_DIRECT;
- ea->base = opts->gen.scratch1;
- //we're explicitly handling the areg dest here, so we exit immediately
- return;
- }
- break;
- case MODE_AREG_PREDEC:
- dec_amount = inst->extra.size == OPSIZE_WORD ? 2 : (inst->extra.size == OPSIZE_LONG ? 4 : (inst->src.params.regs.pri == 7 ? 2 :1));
- cycles(&opts->gen, PREDEC_PENALTY);
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- sub_ir(code, dec_amount, opts->aregs[inst->src.params.regs.pri], SZ_D);
- } else {
- sub_irdisp(code, dec_amount, opts->gen.context_reg, reg_offset(&(inst->src)), SZ_D);
- }
- case MODE_AREG_INDIRECT:
- case MODE_AREG_POSTINC:
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_D);
- }
- m68k_read_size(opts, inst->extra.size);
-
- if (inst->src.addr_mode == MODE_AREG_POSTINC) {
- inc_amount = inst->extra.size == OPSIZE_WORD ? 2 : (inst->extra.size == OPSIZE_LONG ? 4 : (inst->src.params.regs.pri == 7 ? 2 : 1));
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- add_ir(code, inc_amount, opts->aregs[inst->src.params.regs.pri], SZ_D);
- } else {
- add_irdisp(code, inc_amount, opts->gen.context_reg, reg_offset(&(inst->src)), SZ_D);
- }
- }
- ea->mode = MODE_REG_DIRECT;
- ea->base = (inst->dst.addr_mode == MODE_AREG_PREDEC && inst->op != M68K_MOVE) ? opts->gen.scratch2 : opts->gen.scratch1;
- break;
- case MODE_AREG_DISPLACE:
- cycles(&opts->gen, BUS);
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_D);
- }
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- m68k_read_size(opts, inst->extra.size);
-
- ea->mode = MODE_REG_DIRECT;
- ea->base = opts->gen.scratch1;
- break;
- case MODE_AREG_INDEX_DISP8:
- cycles(&opts->gen, 6);
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_D);
- }
- sec_reg = (inst->src.params.regs.sec >> 1) & 0x7;
- if (inst->src.params.regs.sec & 1) {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- }
- } else {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch2, opts->gen.scratch1, SZ_D);
- }
- if (inst->src.params.regs.displacement) {
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- }
- m68k_read_size(opts, inst->extra.size);
-
- ea->mode = MODE_REG_DIRECT;
- ea->base = opts->gen.scratch1;
- break;
- case MODE_PC_DISPLACE:
- cycles(&opts->gen, BUS);
- mov_ir(code, inst->src.params.regs.displacement + inst->address+2, opts->gen.scratch1, SZ_D);
- m68k_read_size(opts, inst->extra.size);
-
- ea->mode = MODE_REG_DIRECT;
- ea->base = opts->gen.scratch1;
- break;
- case MODE_PC_INDEX_DISP8:
- cycles(&opts->gen, 6);
- mov_ir(code, inst->address+2, opts->gen.scratch1, SZ_D);
- sec_reg = (inst->src.params.regs.sec >> 1) & 0x7;
- if (inst->src.params.regs.sec & 1) {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- }
- } else {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch2, opts->gen.scratch1, SZ_D);
- }
- if (inst->src.params.regs.displacement) {
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- }
- m68k_read_size(opts, inst->extra.size);
-
- ea->mode = MODE_REG_DIRECT;
- ea->base = opts->gen.scratch1;
- break;
- case MODE_ABSOLUTE:
- case MODE_ABSOLUTE_SHORT:
- cycles(&opts->gen, inst->src.addr_mode == MODE_ABSOLUTE ? BUS*2 : BUS);
- mov_ir(code, inst->src.params.immed, opts->gen.scratch1, SZ_D);
- m68k_read_size(opts, inst->extra.size);
-
- ea->mode = MODE_REG_DIRECT;
- ea->base = opts->gen.scratch1;
- break;
- case MODE_IMMEDIATE:
- case MODE_IMMEDIATE_WORD:
- if (inst->variant != VAR_QUICK) {
- cycles(&opts->gen, (inst->extra.size == OPSIZE_LONG && inst->src.addr_mode == MODE_IMMEDIATE) ? BUS*2 : BUS);
- }
- ea->mode = MODE_IMMED;
- ea->disp = inst->src.params.immed;
- if (inst->dst.addr_mode == MODE_AREG && inst->extra.size == OPSIZE_WORD && ea->disp & 0x8000) {
- ea->disp |= 0xFFFF0000;
- }
- return;
- default:
- m68k_disasm(inst, disasm_buf);
- printf("%X: %s\naddress mode %d not implemented (src)\n", inst->address, disasm_buf, inst->src.addr_mode);
- exit(1);
- }
- if (inst->dst.addr_mode == MODE_AREG && inst->extra.size == OPSIZE_WORD) {
- if (ea->mode == MODE_REG_DIRECT) {
- movsx_rr(code, ea->base, opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, ea->base, ea->disp, opts->gen.scratch1, SZ_W, SZ_D);
- ea->mode = MODE_REG_DIRECT;
- }
- ea->base = opts->gen.scratch1;
- }
-}
-
-void translate_m68k_dst(m68kinst * inst, x86_ea * ea, m68k_options * opts, uint8_t fake_read)
-{
- code_info *code = &opts->gen.code;
- int8_t reg = native_reg(&(inst->dst), opts), sec_reg;
- int32_t dec_amount, inc_amount;
- if (reg >= 0) {
- ea->mode = MODE_REG_DIRECT;
- ea->base = reg;
- return;
- }
- switch (inst->dst.addr_mode)
- {
- case MODE_REG:
- case MODE_AREG:
- ea->mode = MODE_REG_DISPLACE8;
- ea->base = opts->gen.context_reg;
- ea->disp = reg_offset(&(inst->dst));
- break;
- case MODE_AREG_PREDEC:
- if (inst->src.addr_mode == MODE_AREG_PREDEC) {
- push_r(code, opts->gen.scratch1);
- }
- dec_amount = inst->extra.size == OPSIZE_WORD ? 2 : (inst->extra.size == OPSIZE_LONG ? 4 : (inst->dst.params.regs.pri == 7 ? 2 : 1));
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- sub_ir(code, dec_amount, opts->aregs[inst->dst.params.regs.pri], SZ_D);
- } else {
- sub_irdisp(code, dec_amount, opts->gen.context_reg, reg_offset(&(inst->dst)), SZ_D);
- }
- case MODE_AREG_INDIRECT:
- case MODE_AREG_POSTINC:
- if (fake_read) {
- cycles(&opts->gen, inst->extra.size == OPSIZE_LONG ? 8 : 4);
- } else {
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->dst.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->dst)), opts->gen.scratch1, SZ_D);
- }
- m68k_read_size(opts, inst->extra.size);
- }
- if (inst->src.addr_mode == MODE_AREG_PREDEC) {
- //restore src operand to opts->gen.scratch2
- pop_r(code, opts->gen.scratch2);
- } else {
- //save reg value in opts->gen.scratch2 so we can use it to save the result in memory later
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->dst.params.regs.pri], opts->gen.scratch2, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->dst)), opts->gen.scratch2, SZ_D);
- }
- }
-
- if (inst->dst.addr_mode == MODE_AREG_POSTINC) {
- inc_amount = inst->extra.size == OPSIZE_WORD ? 2 : (inst->extra.size == OPSIZE_LONG ? 4 : (inst->dst.params.regs.pri == 7 ? 2 : 1));
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- add_ir(code, inc_amount, opts->aregs[inst->dst.params.regs.pri], SZ_D);
- } else {
- add_irdisp(code, inc_amount, opts->gen.context_reg, reg_offset(&(inst->dst)), SZ_D);
- }
- }
- ea->mode = MODE_REG_DIRECT;
- ea->base = opts->gen.scratch1;
- break;
- case MODE_AREG_DISPLACE:
- cycles(&opts->gen, fake_read ? BUS+(inst->extra.size == OPSIZE_LONG ? BUS*2 : BUS) : BUS);
- reg = fake_read ? opts->gen.scratch2 : opts->gen.scratch1;
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->dst.params.regs.pri], reg, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->dst)), reg, SZ_D);
- }
- add_ir(code, inst->dst.params.regs.displacement, reg, SZ_D);
- if (!fake_read) {
- push_r(code, opts->gen.scratch1);
- m68k_read_size(opts, inst->extra.size);
- pop_r(code, opts->gen.scratch2);
- }
- ea->mode = MODE_REG_DIRECT;
- ea->base = opts->gen.scratch1;
- break;
- case MODE_AREG_INDEX_DISP8:
- cycles(&opts->gen, fake_read ? (6 + inst->extra.size == OPSIZE_LONG ? 8 : 4) : 6);
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->dst.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->dst)), opts->gen.scratch1, SZ_D);
- }
- sec_reg = (inst->dst.params.regs.sec >> 1) & 0x7;
- if (inst->dst.params.regs.sec & 1) {
- if (inst->dst.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- }
- } else {
- if (inst->dst.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch2, opts->gen.scratch1, SZ_D);
- }
- if (inst->dst.params.regs.displacement) {
- add_ir(code, inst->dst.params.regs.displacement, opts->gen.scratch1, SZ_D);
- }
- if (fake_read) {
- mov_rr(code, opts->gen.scratch1, opts->gen.scratch2, SZ_D);
- } else {
- push_r(code, opts->gen.scratch1);
- m68k_read_size(opts, inst->extra.size);
- pop_r(code, opts->gen.scratch2);
- }
- ea->mode = MODE_REG_DIRECT;
- ea->base = opts->gen.scratch1;
- break;
- case MODE_PC_DISPLACE:
- cycles(&opts->gen, fake_read ? BUS+(inst->extra.size == OPSIZE_LONG ? BUS*2 : BUS) : BUS);
- mov_ir(code, inst->dst.params.regs.displacement + inst->address+2, fake_read ? opts->gen.scratch2 : opts->gen.scratch1, SZ_D);
- if (!fake_read) {
- push_r(code, opts->gen.scratch1);
- m68k_read_size(opts, inst->extra.size);
- pop_r(code, opts->gen.scratch2);
- }
- ea->mode = MODE_REG_DIRECT;
- ea->base = opts->gen.scratch1;
- break;
- case MODE_PC_INDEX_DISP8:
- cycles(&opts->gen, fake_read ? (6 + inst->extra.size == OPSIZE_LONG ? 8 : 4) : 6);
- mov_ir(code, inst->address+2, opts->gen.scratch1, SZ_D);
- sec_reg = (inst->dst.params.regs.sec >> 1) & 0x7;
- if (inst->dst.params.regs.sec & 1) {
- if (inst->dst.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- }
- } else {
- if (inst->dst.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch2, opts->gen.scratch1, SZ_D);
- }
- if (inst->dst.params.regs.displacement) {
- add_ir(code, inst->dst.params.regs.displacement, opts->gen.scratch1, SZ_D);
- }
- if (fake_read) {
- mov_rr(code, opts->gen.scratch1, opts->gen.scratch2, SZ_D);
- } else {
- push_r(code, opts->gen.scratch1);
- m68k_read_size(opts, inst->extra.size);
- pop_r(code, opts->gen.scratch2);
- }
- ea->mode = MODE_REG_DIRECT;
- ea->base = opts->gen.scratch1;
- break;
- case MODE_ABSOLUTE:
- case MODE_ABSOLUTE_SHORT:
- //Add cycles for reading address from instruction stream
- cycles(&opts->gen, (inst->dst.addr_mode == MODE_ABSOLUTE ? BUS*2 : BUS) + (fake_read ? (inst->extra.size == OPSIZE_LONG ? BUS*2 : BUS) : 0));
- mov_ir(code, inst->dst.params.immed, fake_read ? opts->gen.scratch2 : opts->gen.scratch1, SZ_D);
- if (!fake_read) {
- push_r(code, opts->gen.scratch1);
- m68k_read_size(opts, inst->extra.size);
- pop_r(code, opts->gen.scratch2);
- }
- ea->mode = MODE_REG_DIRECT;
- ea->base = opts->gen.scratch1;
- break;
- default:
- m68k_disasm(inst, disasm_buf);
- printf("%X: %s\naddress mode %d not implemented (dst)\n", inst->address, disasm_buf, inst->dst.addr_mode);
- exit(1);
- }
-}
-
-void m68k_save_result(m68kinst * inst, m68k_options * opts)
-{
- code_info *code = &opts->gen.code;
- if (inst->dst.addr_mode != MODE_REG && inst->dst.addr_mode != MODE_AREG) {
- if (inst->dst.addr_mode == MODE_AREG_PREDEC && inst->src.addr_mode == MODE_AREG_PREDEC && inst->op != M68K_MOVE) {
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->dst.params.regs.pri], opts->gen.scratch2, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->dst)), opts->gen.scratch2, SZ_D);
- }
- }
- switch (inst->extra.size)
- {
- case OPSIZE_BYTE:
- call(code, opts->write_8);
- break;
- case OPSIZE_WORD:
- call(code, opts->write_16);
- break;
- case OPSIZE_LONG:
- call(code, opts->write_32_lowfirst);
- break;
- }
- }
-}
-
-code_ptr get_native_address(native_map_slot * native_code_map, uint32_t address)
-{
- address &= 0xFFFFFF;
- address /= 2;
- uint32_t chunk = address / NATIVE_CHUNK_SIZE;
- if (!native_code_map[chunk].base) {
- return NULL;
- }
- uint32_t offset = address % NATIVE_CHUNK_SIZE;
- if (native_code_map[chunk].offsets[offset] == INVALID_OFFSET || native_code_map[chunk].offsets[offset] == EXTENSION_WORD) {
- return NULL;
- }
- return native_code_map[chunk].base + native_code_map[chunk].offsets[offset];
-}
-
-code_ptr get_native_from_context(m68k_context * context, uint32_t address)
-{
- return get_native_address(context->native_code_map, address);
-}
-
-uint32_t get_instruction_start(native_map_slot * native_code_map, uint32_t address)
-{
- address &= 0xFFFFFF;
- address /= 2;
- uint32_t chunk = address / NATIVE_CHUNK_SIZE;
- if (!native_code_map[chunk].base) {
- return 0;
- }
- uint32_t offset = address % NATIVE_CHUNK_SIZE;
- if (native_code_map[chunk].offsets[offset] == INVALID_OFFSET) {
- return 0;
- }
- while (native_code_map[chunk].offsets[offset] == EXTENSION_WORD) {
- --address;
- chunk = address / NATIVE_CHUNK_SIZE;
- offset = address % NATIVE_CHUNK_SIZE;
- }
- return address*2;
-}
-
-void map_native_address(m68k_context * context, uint32_t address, code_ptr native_addr, uint8_t size, uint8_t native_size)
-{
- native_map_slot * native_code_map = context->native_code_map;
- m68k_options * opts = context->options;
- address &= 0xFFFFFF;
- if (address > 0xE00000) {
- context->ram_code_flags[(address & 0xC000) >> 14] |= 1 << ((address & 0x3800) >> 11);
- if (((address & 0x3FFF) + size) & 0xC000) {
- context->ram_code_flags[((address+size) & 0xC000) >> 14] |= 1 << (((address+size) & 0x3800) >> 11);
- }
- uint32_t slot = (address & 0xFFFF)/1024;
- if (!opts->gen.ram_inst_sizes[slot]) {
- opts->gen.ram_inst_sizes[slot] = malloc(sizeof(uint8_t) * 512);
- }
- opts->gen.ram_inst_sizes[slot][((address & 0xFFFF)/2)%512] = native_size;
- }
- address/= 2;
- uint32_t chunk = address / NATIVE_CHUNK_SIZE;
- if (!native_code_map[chunk].base) {
- native_code_map[chunk].base = native_addr;
- native_code_map[chunk].offsets = malloc(sizeof(int32_t) * NATIVE_CHUNK_SIZE);
- memset(native_code_map[chunk].offsets, 0xFF, sizeof(int32_t) * NATIVE_CHUNK_SIZE);
- }
- uint32_t offset = address % NATIVE_CHUNK_SIZE;
- native_code_map[chunk].offsets[offset] = native_addr-native_code_map[chunk].base;
- for(address++,size-=2; size; address++,size-=2) {
- chunk = address / NATIVE_CHUNK_SIZE;
- offset = address % NATIVE_CHUNK_SIZE;
- if (!native_code_map[chunk].base) {
- native_code_map[chunk].base = native_addr;
- native_code_map[chunk].offsets = malloc(sizeof(int32_t) * NATIVE_CHUNK_SIZE);
- memset(native_code_map[chunk].offsets, 0xFF, sizeof(int32_t) * NATIVE_CHUNK_SIZE);
- }
- native_code_map[chunk].offsets[offset] = EXTENSION_WORD;
- }
-}
-
-uint8_t get_native_inst_size(m68k_options * opts, uint32_t address)
-{
- if (address < 0xE00000) {
- return 0;
- }
- uint32_t slot = (address & 0xFFFF)/1024;
- return opts->gen.ram_inst_sizes[slot][((address & 0xFFFF)/2)%512];
-}
-
-void translate_m68k_move(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- int8_t reg, flags_reg, sec_reg;
- uint8_t dir = 0;
- int32_t offset;
- int32_t inc_amount, dec_amount;
- x86_ea src;
- translate_m68k_src(inst, &src, opts);
- reg = native_reg(&(inst->dst), opts);
- if (inst->dst.addr_mode != MODE_AREG) {
- //update statically set flags
- set_flag(opts, 0, FLAG_V);
- set_flag(opts, 0, FLAG_C);
- }
-
- if (inst->dst.addr_mode != MODE_AREG) {
- if (src.mode == MODE_REG_DIRECT) {
- flags_reg = src.base;
- } else {
- if (reg >= 0) {
- flags_reg = reg;
- } else {
- if(src.mode == MODE_REG_DISPLACE8) {
- mov_rdispr(code, src.base, src.disp, opts->gen.scratch1, inst->extra.size);
- } else {
- mov_ir(code, src.disp, opts->gen.scratch1, inst->extra.size);
- }
- src.mode = MODE_REG_DIRECT;
- flags_reg = src.base = opts->gen.scratch1;
- }
- }
- }
- uint8_t size = inst->extra.size;
- switch(inst->dst.addr_mode)
- {
- case MODE_AREG:
- size = OPSIZE_LONG;
- case MODE_REG:
- if (reg >= 0) {
- if (src.mode == MODE_REG_DIRECT) {
- mov_rr(code, src.base, reg, size);
- } else if (src.mode == MODE_REG_DISPLACE8) {
- mov_rdispr(code, src.base, src.disp, reg, size);
- } else {
- mov_ir(code, src.disp, reg, size);
- }
- } else if(src.mode == MODE_REG_DIRECT) {
- mov_rrdisp(code, src.base, opts->gen.context_reg, reg_offset(&(inst->dst)), size);
- } else {
- mov_irdisp(code, src.disp, opts->gen.context_reg, reg_offset(&(inst->dst)), size);
- }
- if (inst->dst.addr_mode != MODE_AREG) {
- cmp_ir(code, 0, flags_reg, size);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- }
- break;
- case MODE_AREG_PREDEC:
- dec_amount = inst->extra.size == OPSIZE_WORD ? 2 : (inst->extra.size == OPSIZE_LONG ? 4 : (inst->dst.params.regs.pri == 7 ? 2 : 1));
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- sub_ir(code, dec_amount, opts->aregs[inst->dst.params.regs.pri], SZ_D);
- } else {
- sub_irdisp(code, dec_amount, opts->gen.context_reg, reg_offset(&(inst->dst)), SZ_D);
- }
- case MODE_AREG_INDIRECT:
- case MODE_AREG_POSTINC:
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->dst.params.regs.pri], opts->gen.scratch2, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->dst)), opts->gen.scratch2, SZ_D);
- }
- if (src.mode == MODE_REG_DIRECT) {
- if (src.base != opts->gen.scratch1) {
- mov_rr(code, src.base, opts->gen.scratch1, inst->extra.size);
- }
- } else if (src.mode == MODE_REG_DISPLACE8) {
- mov_rdispr(code, src.base, src.disp, opts->gen.scratch1, inst->extra.size);
- } else {
- mov_ir(code, src.disp, opts->gen.scratch1, inst->extra.size);
- }
- if (inst->dst.addr_mode != MODE_AREG) {
- cmp_ir(code, 0, flags_reg, inst->extra.size);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- }
- m68k_write_size(opts, inst->extra.size);
-
- if (inst->dst.addr_mode == MODE_AREG_POSTINC) {
- inc_amount = inst->extra.size == OPSIZE_WORD ? 2 : (inst->extra.size == OPSIZE_LONG ? 4 : (inst->dst.params.regs.pri == 7 ? 2 : 1));
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- add_ir(code, inc_amount, opts->aregs[inst->dst.params.regs.pri], SZ_D);
- } else {
- add_irdisp(code, inc_amount, opts->gen.context_reg, reg_offset(&(inst->dst)), SZ_D);
- }
- }
- break;
- case MODE_AREG_DISPLACE:
- cycles(&opts->gen, BUS);
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->dst.params.regs.pri], opts->gen.scratch2, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->dst)), opts->gen.scratch2, SZ_D);
- }
- add_ir(code, inst->dst.params.regs.displacement, opts->gen.scratch2, SZ_D);
- if (src.mode == MODE_REG_DIRECT) {
- if (src.base != opts->gen.scratch1) {
- mov_rr(code, src.base, opts->gen.scratch1, inst->extra.size);
- }
- } else if (src.mode == MODE_REG_DISPLACE8) {
- mov_rdispr(code, src.base, src.disp, opts->gen.scratch1, inst->extra.size);
- } else {
- mov_ir(code, src.disp, opts->gen.scratch1, inst->extra.size);
- }
- if (inst->dst.addr_mode != MODE_AREG) {
- cmp_ir(code, 0, flags_reg, inst->extra.size);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- }
- m68k_write_size(opts, inst->extra.size);
- break;
- case MODE_AREG_INDEX_DISP8:
- cycles(&opts->gen, 6);//TODO: Check to make sure this is correct
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->dst.params.regs.pri], opts->gen.scratch2, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->dst)), opts->gen.scratch2, SZ_D);
- }
- sec_reg = (inst->dst.params.regs.sec >> 1) & 0x7;
- if (inst->dst.params.regs.sec & 1) {
- if (inst->dst.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_D);
- }
- }
- } else {
- if (src.base == opts->gen.scratch1) {
- push_r(code, opts->gen.scratch1);
- }
- if (inst->dst.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch1, opts->gen.scratch2, SZ_D);
- if (src.base == opts->gen.scratch1) {
- pop_r(code, opts->gen.scratch1);
- }
- }
- if (inst->dst.params.regs.displacement) {
- add_ir(code, inst->dst.params.regs.displacement, opts->gen.scratch2, SZ_D);
- }
- if (src.mode == MODE_REG_DIRECT) {
- if (src.base != opts->gen.scratch1) {
- mov_rr(code, src.base, opts->gen.scratch1, inst->extra.size);
- }
- } else if (src.mode == MODE_REG_DISPLACE8) {
- mov_rdispr(code, src.base, src.disp, opts->gen.scratch1, inst->extra.size);
- } else {
- mov_ir(code, src.disp, opts->gen.scratch1, inst->extra.size);
- }
- if (inst->dst.addr_mode != MODE_AREG) {
- cmp_ir(code, 0, flags_reg, inst->extra.size);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- }
- m68k_write_size(opts, inst->extra.size);
- break;
- case MODE_PC_DISPLACE:
- cycles(&opts->gen, BUS);
- mov_ir(code, inst->dst.params.regs.displacement + inst->address+2, opts->gen.scratch2, SZ_D);
- if (src.mode == MODE_REG_DIRECT) {
- if (src.base != opts->gen.scratch1) {
- mov_rr(code, src.base, opts->gen.scratch1, inst->extra.size);
- }
- } else if (src.mode == MODE_REG_DISPLACE8) {
- mov_rdispr(code, src.base, src.disp, opts->gen.scratch1, inst->extra.size);
- } else {
- mov_ir(code, src.disp, opts->gen.scratch1, inst->extra.size);
- }
- if (inst->dst.addr_mode != MODE_AREG) {
- cmp_ir(code, 0, flags_reg, inst->extra.size);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- }
- m68k_write_size(opts, inst->extra.size);
- break;
- case MODE_PC_INDEX_DISP8:
- cycles(&opts->gen, 6);//TODO: Check to make sure this is correct
- mov_ir(code, inst->address, opts->gen.scratch2, SZ_D);
- sec_reg = (inst->dst.params.regs.sec >> 1) & 0x7;
- if (inst->dst.params.regs.sec & 1) {
- if (inst->dst.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_D);
- }
- }
- } else {
- if (src.base == opts->gen.scratch1) {
- push_r(code, opts->gen.scratch1);
- }
- if (inst->dst.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch1, opts->gen.scratch2, SZ_D);
- if (src.base == opts->gen.scratch1) {
- pop_r(code, opts->gen.scratch1);
- }
- }
- if (inst->dst.params.regs.displacement) {
- add_ir(code, inst->dst.params.regs.displacement, opts->gen.scratch2, SZ_D);
- }
- if (src.mode == MODE_REG_DIRECT) {
- if (src.base != opts->gen.scratch1) {
- mov_rr(code, src.base, opts->gen.scratch1, inst->extra.size);
- }
- } else if (src.mode == MODE_REG_DISPLACE8) {
- mov_rdispr(code, src.base, src.disp, opts->gen.scratch1, inst->extra.size);
- } else {
- mov_ir(code, src.disp, opts->gen.scratch1, inst->extra.size);
- }
- if (inst->dst.addr_mode != MODE_AREG) {
- cmp_ir(code, 0, flags_reg, inst->extra.size);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- }
- m68k_write_size(opts, inst->extra.size);
- break;
- case MODE_ABSOLUTE:
- case MODE_ABSOLUTE_SHORT:
- if (src.mode == MODE_REG_DIRECT) {
- if (src.base != opts->gen.scratch1) {
- mov_rr(code, src.base, opts->gen.scratch1, inst->extra.size);
- }
- } else if (src.mode == MODE_REG_DISPLACE8) {
- mov_rdispr(code, src.base, src.disp, opts->gen.scratch1, inst->extra.size);
- } else {
- mov_ir(code, src.disp, opts->gen.scratch1, inst->extra.size);
- }
- if (inst->dst.addr_mode == MODE_ABSOLUTE) {
- cycles(&opts->gen, BUS*2);
- } else {
- cycles(&opts->gen, BUS);
- }
- mov_ir(code, inst->dst.params.immed, opts->gen.scratch2, SZ_D);
- if (inst->dst.addr_mode != MODE_AREG) {
- cmp_ir(code, 0, flags_reg, inst->extra.size);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- }
- m68k_write_size(opts, inst->extra.size);
- break;
- default:
- m68k_disasm(inst, disasm_buf);
- printf("%X: %s\naddress mode %d not implemented (move dst)\n", inst->address, disasm_buf, inst->dst.addr_mode);
- exit(1);
- }
-
- //add cycles for prefetch
- cycles(&opts->gen, BUS);
-}
-
-void translate_m68k_movem(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- int8_t bit,reg,sec_reg;
- uint8_t early_cycles;
- if(inst->src.addr_mode == MODE_REG) {
- //reg to mem
- early_cycles = 8;
- int8_t dir;
- switch (inst->dst.addr_mode)
- {
- case MODE_AREG_INDIRECT:
- case MODE_AREG_PREDEC:
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->dst.params.regs.pri], opts->gen.scratch2, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->dst)), opts->gen.scratch2, SZ_D);
- }
- break;
- case MODE_AREG_DISPLACE:
- early_cycles += BUS;
- reg = opts->gen.scratch2;
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->dst.params.regs.pri], opts->gen.scratch2, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->dst)), opts->gen.scratch2, SZ_D);
- }
- add_ir(code, inst->dst.params.regs.displacement, opts->gen.scratch2, SZ_D);
- break;
- case MODE_AREG_INDEX_DISP8:
- early_cycles += 6;
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->dst.params.regs.pri], opts->gen.scratch2, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->dst)), opts->gen.scratch2, SZ_D);
- }
- sec_reg = (inst->dst.params.regs.sec >> 1) & 0x7;
- if (inst->dst.params.regs.sec & 1) {
- if (inst->dst.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_D);
- }
- }
- } else {
- if (inst->dst.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch1, opts->gen.scratch2, SZ_D);
- }
- if (inst->dst.params.regs.displacement) {
- add_ir(code, inst->dst.params.regs.displacement, opts->gen.scratch2, SZ_D);
- }
- break;
- case MODE_PC_DISPLACE:
- early_cycles += BUS;
- mov_ir(code, inst->dst.params.regs.displacement + inst->address+2, opts->gen.scratch2, SZ_D);
- break;
- case MODE_PC_INDEX_DISP8:
- early_cycles += 6;
- mov_ir(code, inst->address+2, opts->gen.scratch2, SZ_D);
- sec_reg = (inst->dst.params.regs.sec >> 1) & 0x7;
- if (inst->dst.params.regs.sec & 1) {
- if (inst->dst.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_D);
- }
- }
- } else {
- if (inst->dst.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch1, opts->gen.scratch2, SZ_D);
- }
- if (inst->dst.params.regs.displacement) {
- add_ir(code, inst->dst.params.regs.displacement, opts->gen.scratch2, SZ_D);
- }
- break;
- case MODE_ABSOLUTE:
- early_cycles += 4;
- case MODE_ABSOLUTE_SHORT:
- early_cycles += 4;
- mov_ir(code, inst->dst.params.immed, opts->gen.scratch2, SZ_D);
- break;
- default:
- m68k_disasm(inst, disasm_buf);
- printf("%X: %s\naddress mode %d not implemented (movem dst)\n", inst->address, disasm_buf, inst->dst.addr_mode);
- exit(1);
- }
- if (inst->dst.addr_mode == MODE_AREG_PREDEC) {
- reg = 15;
- dir = -1;
- } else {
- reg = 0;
- dir = 1;
- }
- cycles(&opts->gen, early_cycles);
- for(bit=0; reg < 16 && reg >= 0; reg += dir, bit++) {
- if (inst->src.params.immed & (1 << bit)) {
- if (inst->dst.addr_mode == MODE_AREG_PREDEC) {
- sub_ir(code, (inst->extra.size == OPSIZE_LONG) ? 4 : 2, opts->gen.scratch2, SZ_D);
- }
- push_r(code, opts->gen.scratch2);
- if (reg > 7) {
- if (opts->aregs[reg-8] >= 0) {
- mov_rr(code, opts->aregs[reg-8], opts->gen.scratch1, inst->extra.size);
- } else {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * (reg-8), opts->gen.scratch1, inst->extra.size);
- }
- } else {
- if (opts->dregs[reg] >= 0) {
- mov_rr(code, opts->dregs[reg], opts->gen.scratch1, inst->extra.size);
- } else {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t) * (reg), opts->gen.scratch1, inst->extra.size);
- }
- }
- if (inst->extra.size == OPSIZE_LONG) {
- call(code, opts->write_32_lowfirst);
- } else {
- call(code, opts->write_16);
- }
- pop_r(code, opts->gen.scratch2);
- if (inst->dst.addr_mode != MODE_AREG_PREDEC) {
- add_ir(code, (inst->extra.size == OPSIZE_LONG) ? 4 : 2, opts->gen.scratch2, SZ_D);
- }
- }
- }
- if (inst->dst.addr_mode == MODE_AREG_PREDEC) {
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->gen.scratch2, opts->aregs[inst->dst.params.regs.pri], SZ_D);
- } else {
- mov_rrdisp(code, opts->gen.scratch2, opts->gen.context_reg, reg_offset(&(inst->dst)), SZ_D);
- }
- }
- } else {
- //mem to reg
- early_cycles = 4;
- switch (inst->src.addr_mode)
- {
- case MODE_AREG_INDIRECT:
- case MODE_AREG_POSTINC:
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_D);
- }
- break;
- case MODE_AREG_DISPLACE:
- early_cycles += BUS;
- reg = opts->gen.scratch2;
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_D);
- }
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- break;
- case MODE_AREG_INDEX_DISP8:
- early_cycles += 6;
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_D);
- }
- sec_reg = (inst->src.params.regs.sec >> 1) & 0x7;
- if (inst->src.params.regs.sec & 1) {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- }
- } else {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch2, opts->gen.scratch1, SZ_D);
- }
- if (inst->src.params.regs.displacement) {
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- }
- break;
- case MODE_PC_DISPLACE:
- early_cycles += BUS;
- mov_ir(code, inst->src.params.regs.displacement + inst->address+2, opts->gen.scratch1, SZ_D);
- break;
- case MODE_PC_INDEX_DISP8:
- early_cycles += 6;
- mov_ir(code, inst->address+2, opts->gen.scratch1, SZ_D);
- sec_reg = (inst->src.params.regs.sec >> 1) & 0x7;
- if (inst->src.params.regs.sec & 1) {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- }
- } else {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch2, opts->gen.scratch1, SZ_D);
- }
- if (inst->src.params.regs.displacement) {
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- }
- break;
- case MODE_ABSOLUTE:
- early_cycles += 4;
- case MODE_ABSOLUTE_SHORT:
- early_cycles += 4;
- mov_ir(code, inst->src.params.immed, opts->gen.scratch1, SZ_D);
- break;
- default:
- m68k_disasm(inst, disasm_buf);
- printf("%X: %s\naddress mode %d not implemented (movem src)\n", inst->address, disasm_buf, inst->src.addr_mode);
- exit(1);
- }
- cycles(&opts->gen, early_cycles);
- for(reg = 0; reg < 16; reg ++) {
- if (inst->dst.params.immed & (1 << reg)) {
- push_r(code, opts->gen.scratch1);
- if (inst->extra.size == OPSIZE_LONG) {
- call(code, opts->read_32);
- } else {
- call(code, opts->read_16);
- }
- if (inst->extra.size == OPSIZE_WORD) {
- movsx_rr(code, opts->gen.scratch1, opts->gen.scratch1, SZ_W, SZ_D);
- }
- if (reg > 7) {
- if (opts->aregs[reg-8] >= 0) {
- mov_rr(code, opts->gen.scratch1, opts->aregs[reg-8], SZ_D);
- } else {
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * (reg-8), SZ_D);
- }
- } else {
- if (opts->dregs[reg] >= 0) {
- mov_rr(code, opts->gen.scratch1, opts->dregs[reg], SZ_D);
- } else {
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t) * (reg), SZ_D);
- }
- }
- pop_r(code, opts->gen.scratch1);
- add_ir(code, (inst->extra.size == OPSIZE_LONG) ? 4 : 2, opts->gen.scratch1, SZ_D);
- }
- }
- if (inst->src.addr_mode == MODE_AREG_POSTINC) {
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->gen.scratch1, opts->aregs[inst->src.params.regs.pri], SZ_D);
- } else {
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, reg_offset(&(inst->src)), SZ_D);
- }
- }
- }
- //prefetch
- cycles(&opts->gen, 4);
-}
-
-void translate_m68k_clr(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- set_flag(opts, 0, FLAG_N);
- set_flag(opts, 0, FLAG_V);
- set_flag(opts, 0, FLAG_C);
- set_flag(opts, 1, FLAG_Z);
- int8_t reg = native_reg(&(inst->dst), opts);
- if (reg >= 0) {
- cycles(&opts->gen, (inst->extra.size == OPSIZE_LONG ? 6 : 4));
- xor_rr(code, reg, reg, inst->extra.size);
- return;
- }
- x86_ea dst_op;
- translate_m68k_dst(inst, &dst_op, opts, 1);
- if (dst_op.mode == MODE_REG_DIRECT) {
- xor_rr(code, dst_op.base, dst_op.base, inst->extra.size);
- } else {
- mov_irdisp(code, 0, dst_op.base, dst_op.disp, inst->extra.size);
- }
- m68k_save_result(inst, opts);
-}
-
-void translate_m68k_ext(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- x86_ea dst_op;
- uint8_t dst_size = inst->extra.size;
- inst->extra.size--;
- translate_m68k_dst(inst, &dst_op, opts, 0);
- if (dst_op.mode == MODE_REG_DIRECT) {
- movsx_rr(code, dst_op.base, dst_op.base, inst->extra.size, dst_size);
- cmp_ir(code, 0, dst_op.base, dst_size);
- } else {
- movsx_rdispr(code, dst_op.base, dst_op.disp, opts->gen.scratch1, inst->extra.size, dst_size);
- cmp_ir(code, 0, opts->gen.scratch1, dst_size);
- mov_rrdisp(code, opts->gen.scratch1, dst_op.base, dst_op.disp, dst_size);
- }
- inst->extra.size = dst_size;
- set_flag(opts, 0, FLAG_V);
- set_flag(opts, 0, FLAG_C);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- //M68K EXT only operates on registers so no need for a call to save result here
-}
-
-void translate_m68k_lea(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- int8_t dst_reg = native_reg(&(inst->dst), opts), sec_reg;
- switch(inst->src.addr_mode)
- {
- case MODE_AREG_INDIRECT:
- cycles(&opts->gen, BUS);
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- if (dst_reg >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], dst_reg, SZ_D);
- } else {
- mov_rrdisp(code, opts->aregs[inst->src.params.regs.pri], opts->gen.context_reg, offsetof(m68k_context, aregs) + 4 * inst->dst.params.regs.pri, SZ_D);
- }
- } else {
- if (dst_reg >= 0) {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + 4 * inst->src.params.regs.pri, dst_reg, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + 4 * inst->src.params.regs.pri, opts->gen.scratch1, SZ_D);
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, offsetof(m68k_context, aregs) + 4 * inst->dst.params.regs.pri, SZ_D);
- }
- }
- break;
- case MODE_AREG_DISPLACE:
- cycles(&opts->gen, 8);
- if (dst_reg >= 0) {
- if (inst->src.params.regs.pri != inst->dst.params.regs.pri) {
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], dst_reg, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), dst_reg, SZ_D);
- }
- }
- add_ir(code, inst->src.params.regs.displacement, dst_reg, SZ_D);
- } else {
- if (inst->src.params.regs.pri != inst->dst.params.regs.pri) {
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rrdisp(code, opts->aregs[inst->src.params.regs.pri], opts->gen.context_reg, reg_offset(&(inst->dst)), SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_D);
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, reg_offset(&(inst->dst)), SZ_D);
- }
- }
- add_irdisp(code, inst->src.params.regs.displacement, opts->gen.context_reg, reg_offset(&(inst->dst)), SZ_D);
- }
- break;
- case MODE_AREG_INDEX_DISP8:
- cycles(&opts->gen, 12);
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch2, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch2, SZ_D);
- }
- sec_reg = (inst->src.params.regs.sec >> 1) & 0x7;
- if (inst->src.params.regs.sec & 1) {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_D);
- }
- }
- } else {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch1, opts->gen.scratch2, SZ_D);
- }
- if (inst->src.params.regs.displacement) {
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch2, SZ_D);
- }
- if (dst_reg >= 0) {
- mov_rr(code, opts->gen.scratch2, dst_reg, SZ_D);
- } else {
- mov_rrdisp(code, opts->gen.scratch2, opts->gen.context_reg, reg_offset(&(inst->dst)), SZ_D);
- }
- break;
- case MODE_PC_DISPLACE:
- cycles(&opts->gen, 8);
- if (dst_reg >= 0) {
- mov_ir(code, inst->src.params.regs.displacement + inst->address+2, dst_reg, SZ_D);
- } else {
- mov_irdisp(code, inst->src.params.regs.displacement + inst->address+2, opts->gen.context_reg, offsetof(m68k_context, aregs) + 4 * inst->dst.params.regs.pri, SZ_D);
- }
- break;
- case MODE_PC_INDEX_DISP8:
- cycles(&opts->gen, BUS*3);
- mov_ir(code, inst->address+2, opts->gen.scratch1, SZ_D);
- sec_reg = (inst->src.params.regs.sec >> 1) & 0x7;
- if (inst->src.params.regs.sec & 1) {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- }
- } else {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch2, opts->gen.scratch1, SZ_D);
- }
- if (inst->src.params.regs.displacement) {
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- }
- if (dst_reg >= 0) {
- mov_rr(code, opts->gen.scratch1, dst_reg, SZ_D);
- } else {
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, reg_offset(&(inst->dst)), SZ_D);
- }
- break;
- case MODE_ABSOLUTE:
- case MODE_ABSOLUTE_SHORT:
- cycles(&opts->gen, (inst->src.addr_mode == MODE_ABSOLUTE) ? BUS * 3 : BUS * 2);
- if (dst_reg >= 0) {
- mov_ir(code, inst->src.params.immed, dst_reg, SZ_D);
- } else {
- mov_irdisp(code, inst->src.params.immed, opts->gen.context_reg, reg_offset(&(inst->dst)), SZ_D);
- }
- break;
- default:
- m68k_disasm(inst, disasm_buf);
- printf("%X: %s\naddress mode %d not implemented (lea src)\n", inst->address, disasm_buf, inst->src.addr_mode);
- exit(1);
- }
-}
-
-void translate_m68k_pea(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- uint8_t sec_reg;
- switch(inst->src.addr_mode)
- {
- case MODE_AREG_INDIRECT:
- cycles(&opts->gen, BUS);
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + 4 * inst->src.params.regs.pri, opts->gen.scratch1, SZ_D);
- }
- break;
- case MODE_AREG_DISPLACE:
- cycles(&opts->gen, 8);
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_D);
- }
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- break;
- case MODE_AREG_INDEX_DISP8:
- cycles(&opts->gen, 6);//TODO: Check to make sure this is correct
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_D);
- }
- sec_reg = (inst->src.params.regs.sec >> 1) & 0x7;
- if (inst->src.params.regs.sec & 1) {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- }
- } else {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch2, opts->gen.scratch1, SZ_D);
- }
- if (inst->src.params.regs.displacement) {
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- }
- break;
- case MODE_PC_DISPLACE:
- cycles(&opts->gen, 8);
- mov_ir(code, inst->src.params.regs.displacement + inst->address+2, opts->gen.scratch1, SZ_D);
- break;
- case MODE_ABSOLUTE:
- case MODE_ABSOLUTE_SHORT:
- cycles(&opts->gen, (inst->src.addr_mode == MODE_ABSOLUTE) ? BUS * 3 : BUS * 2);
- mov_ir(code, inst->src.params.immed, opts->gen.scratch1, SZ_D);
- break;
- default:
- m68k_disasm(inst, disasm_buf);
- printf("%X: %s\naddress mode %d not implemented (lea src)\n", inst->address, disasm_buf, inst->src.addr_mode);
- exit(1);
- }
- sub_ir(code, 4, opts->aregs[7], SZ_D);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- call(code, opts->write_32_lowfirst);
-}
-
-void translate_m68k_bsr(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- int32_t disp = inst->src.params.immed;
- uint32_t after = inst->address + (inst->variant == VAR_BYTE ? 2 : 4);
- //TODO: Add cycles in the right place relative to pushing the return address on the stack
- cycles(&opts->gen, 10);
- mov_ir(code, after, opts->gen.scratch1, SZ_D);
- sub_ir(code, 4, opts->aregs[7], SZ_D);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- call(code, opts->write_32_highfirst);
- code_ptr dest_addr = get_native_address(opts->gen.native_code_map, (inst->address+2) + disp);
- if (!dest_addr) {
- opts->gen.deferred = defer_address(opts->gen.deferred, (inst->address+2) + disp, code->cur + 1);
- //dummy address to be replaced later
- dest_addr = code->cur + 256;
- }
- jmp(code, dest_addr);
-}
-
-uint8_t m68k_eval_cond(m68k_options * opts, uint8_t cc)
-{
- uint8_t cond = CC_NZ;
- switch (cc)
- {
- case COND_HIGH:
- cond = CC_Z;
- case COND_LOW_SAME:
- flag_to_reg(opts, FLAG_Z, opts->gen.scratch1);
- or_flag_to_reg(opts, FLAG_C, opts->gen.scratch1);
- break;
- case COND_CARRY_CLR:
- cond = CC_Z;
- case COND_CARRY_SET:
- check_flag(opts, FLAG_C);
- break;
- case COND_NOT_EQ:
- cond = CC_Z;
- case COND_EQ:
- check_flag(opts, FLAG_Z);
- break;
- case COND_OVERF_CLR:
- cond = CC_Z;
- case COND_OVERF_SET:
- check_flag(opts, FLAG_V);
- break;
- case COND_PLUS:
- cond = CC_Z;
- case COND_MINUS:
- check_flag(opts, FLAG_N);
- break;
- case COND_GREATER_EQ:
- cond = CC_Z;
- case COND_LESS:
- cmp_flags(opts, FLAG_N, FLAG_V);
- break;
- case COND_GREATER:
- cond = CC_Z;
- case COND_LESS_EQ:
- flag_to_reg(opts, FLAG_V, opts->gen.scratch1);
- xor_flag_to_reg(opts, FLAG_N, opts->gen.scratch1);
- or_flag_to_reg(opts, FLAG_Z, opts->gen.scratch1);
- break;
- }
- return cond;
-}
-
-void translate_m68k_bcc(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- cycles(&opts->gen, 10);//TODO: Adjust this for branch not taken case
- int32_t disp = inst->src.params.immed;
- uint32_t after = inst->address + 2;
- code_ptr dest_addr = get_native_address(opts->gen.native_code_map, after + disp);
- if (inst->extra.cond == COND_TRUE) {
- if (!dest_addr) {
- opts->gen.deferred = defer_address(opts->gen.deferred, after + disp, code->cur + 1);
- //dummy address to be replaced later, make sure it generates a 4-byte displacement
- dest_addr = code->cur + 256;
- }
- jmp(code, dest_addr);
- } else {
- uint8_t cond = m68k_eval_cond(opts, inst->extra.cond);
- if (!dest_addr) {
- opts->gen.deferred = defer_address(opts->gen.deferred, after + disp, code->cur + 2);
- //dummy address to be replaced later, make sure it generates a 4-byte displacement
- dest_addr = code->cur + 256;
- }
- jcc(code, cond, dest_addr);
- }
-}
-
-void translate_m68k_scc(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- uint8_t cond = inst->extra.cond;
- x86_ea dst_op;
- inst->extra.size = OPSIZE_BYTE;
- translate_m68k_dst(inst, &dst_op, opts, 1);
- if (cond == COND_TRUE || cond == COND_FALSE) {
- if ((inst->dst.addr_mode == MODE_REG || inst->dst.addr_mode == MODE_AREG) && inst->extra.cond == COND_TRUE) {
- cycles(&opts->gen, 6);
- } else {
- cycles(&opts->gen, BUS);
- }
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_ir(code, cond == COND_TRUE ? 0xFF : 0, dst_op.base, SZ_B);
- } else {
- mov_irdisp(code, cond == COND_TRUE ? 0xFF : 0, dst_op.base, dst_op.disp, SZ_B);
- }
- } else {
- uint8_t cc = m68k_eval_cond(opts, cond);
- check_alloc_code(code, 6*MAX_INST_LEN);
- code_ptr true_off = code->cur + 1;
- jcc(code, cc, code->cur+2);
- cycles(&opts->gen, BUS);
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_ir(code, 0, dst_op.base, SZ_B);
- } else {
- mov_irdisp(code, 0, dst_op.base, dst_op.disp, SZ_B);
- }
- code_ptr end_off = code->cur+1;
- jmp(code, code->cur+2);
- *true_off = code->cur - (true_off+1);
- cycles(&opts->gen, 6);
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_ir(code, 0xFF, dst_op.base, SZ_B);
- } else {
- mov_irdisp(code, 0xFF, dst_op.base, dst_op.disp, SZ_B);
- }
- *end_off = code->cur - (end_off+1);
- }
- m68k_save_result(inst, opts);
-}
-
-void translate_m68k_jmp_jsr(m68k_options * opts, m68kinst * inst)
-{
- uint8_t is_jsr = inst->op == M68K_JSR;
- code_info *code = &opts->gen.code;
- code_ptr dest_addr;
- uint8_t sec_reg;
- uint32_t after;
- uint32_t m68k_addr;
- switch(inst->src.addr_mode)
- {
- case MODE_AREG_INDIRECT:
- cycles(&opts->gen, BUS*2);
- if (is_jsr) {
- mov_ir(code, inst->address + 2, opts->gen.scratch1, SZ_D);
- sub_ir(code, 4, opts->aregs[7], SZ_D);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- call(code, opts->write_32_highfirst);
- }
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + 4 * inst->src.params.regs.pri, opts->gen.scratch1, SZ_D);
- }
- call(code, opts->native_addr);
- jmp_r(code, opts->gen.scratch1);
- break;
- case MODE_AREG_DISPLACE:
- cycles(&opts->gen, BUS*2);
- if (is_jsr) {
- mov_ir(code, inst->address + 4, opts->gen.scratch1, SZ_D);
- sub_ir(code, 4, opts->aregs[7], SZ_D);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- call(code, opts->write_32_highfirst);
- }
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + 4 * inst->src.params.regs.pri, opts->gen.scratch1, SZ_D);
- }
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- call(code, opts->native_addr);
- jmp_r(code, opts->gen.scratch1);
- break;
- case MODE_AREG_INDEX_DISP8:
- cycles(&opts->gen, BUS*3);//TODO: CHeck that this is correct
- if (is_jsr) {
- mov_ir(code, inst->address + 4, opts->gen.scratch1, SZ_D);
- sub_ir(code, 4, opts->aregs[7], SZ_D);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- call(code, opts->write_32_highfirst);
- }
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_D);
- }
- sec_reg = (inst->src.params.regs.sec >> 1) & 0x7;
- if (inst->src.params.regs.sec & 1) {
- //32-bit index register
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- }
- } else {
- //16-bit index register
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch2, opts->gen.scratch1, SZ_D);
- }
- if (inst->src.params.regs.displacement) {
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- }
- call(code, opts->native_addr);
- jmp_r(code, opts->gen.scratch1);
- break;
- case MODE_PC_DISPLACE:
- //TODO: Add cycles in the right place relative to pushing the return address on the stack
- cycles(&opts->gen, 10);
- if (is_jsr) {
- mov_ir(code, inst->address + 4, opts->gen.scratch1, SZ_D);
- sub_ir(code, 4, opts->aregs[7], SZ_D);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- call(code, opts->write_32_highfirst);
- }
- m68k_addr = inst->src.params.regs.displacement + inst->address + 2;
- if ((m68k_addr & 0xFFFFFF) < 0x400000) {
- dest_addr = get_native_address(opts->gen.native_code_map, m68k_addr);
- if (!dest_addr) {
- opts->gen.deferred = defer_address(opts->gen.deferred, m68k_addr, code->cur + 1);
- //dummy address to be replaced later, make sure it generates a 4-byte displacement
- dest_addr = code->cur + 256;
- }
- jmp(code, dest_addr);
- } else {
- mov_ir(code, m68k_addr, opts->gen.scratch1, SZ_D);
- call(code, opts->native_addr);
- jmp_r(code, opts->gen.scratch1);
- }
- break;
- case MODE_PC_INDEX_DISP8:
- cycles(&opts->gen, BUS*3);//TODO: CHeck that this is correct
- if (is_jsr) {
- mov_ir(code, inst->address + 4, opts->gen.scratch1, SZ_D);
- sub_ir(code, 4, opts->aregs[7], SZ_D);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- call(code, opts->write_32_highfirst);
- }
- mov_ir(code, inst->address+2, opts->gen.scratch1, SZ_D);
- sec_reg = (inst->src.params.regs.sec >> 1) & 0x7;
- if (inst->src.params.regs.sec & 1) {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- add_rr(code, opts->aregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- add_rr(code, opts->dregs[sec_reg], opts->gen.scratch1, SZ_D);
- } else {
- add_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch1, SZ_D);
- }
- }
- } else {
- if (inst->src.params.regs.sec & 0x10) {
- if (opts->aregs[sec_reg] >= 0) {
- movsx_rr(code, opts->aregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- } else {
- if (opts->dregs[sec_reg] >= 0) {
- movsx_rr(code, opts->dregs[sec_reg], opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movsx_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, opts->gen.scratch2, SZ_W, SZ_D);
- }
- }
- add_rr(code, opts->gen.scratch2, opts->gen.scratch1, SZ_D);
- }
- if (inst->src.params.regs.displacement) {
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- }
- call(code, opts->native_addr);
- jmp_r(code, opts->gen.scratch1);
- break;
- case MODE_ABSOLUTE:
- case MODE_ABSOLUTE_SHORT:
- //TODO: Add cycles in the right place relative to pushing the return address on the stack
- cycles(&opts->gen, inst->src.addr_mode == MODE_ABSOLUTE ? 12 : 10);
- if (is_jsr) {
- mov_ir(code, inst->address + (inst->src.addr_mode == MODE_ABSOLUTE ? 6 : 4), opts->gen.scratch1, SZ_D);
- sub_ir(code, 4, opts->aregs[7], SZ_D);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- call(code, opts->write_32_highfirst);
- }
- m68k_addr = inst->src.params.immed;
- if ((m68k_addr & 0xFFFFFF) < 0x400000) {
- dest_addr = get_native_address(opts->gen.native_code_map, m68k_addr);
- if (!dest_addr) {
- opts->gen.deferred = defer_address(opts->gen.deferred, m68k_addr, code->cur + 1);
- //dummy address to be replaced later, make sure it generates a 4-byte displacement
- dest_addr = code->cur + 256;
- }
- jmp(code, dest_addr);
- } else {
- mov_ir(code, m68k_addr, opts->gen.scratch1, SZ_D);
- call(code, opts->native_addr);
- jmp_r(code, opts->gen.scratch1);
- }
- break;
- default:
- m68k_disasm(inst, disasm_buf);
- printf("%s\naddress mode %d not yet supported (%s)\n", disasm_buf, inst->src.addr_mode, is_jsr ? "jsr" : "jmp");
- exit(1);
- }
-}
-
-void translate_m68k_rts(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- //TODO: Add cycles
- mov_rr(code, opts->aregs[7], opts->gen.scratch1, SZ_D);
- add_ir(code, 4, opts->aregs[7], SZ_D);
- call(code, opts->read_32);
- call(code, opts->native_addr);
- jmp_r(code, opts->gen.scratch1);
-}
-
-void translate_m68k_dbcc(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- //best case duration
- cycles(&opts->gen, 10);
- code_ptr skip_loc = NULL;
- //TODO: Check if COND_TRUE technically valid here even though
- //it's basically a slow NOP
- if (inst->extra.cond != COND_FALSE) {
- uint8_t cond = m68k_eval_cond(opts, inst->extra.cond);
- check_alloc_code(code, 6*MAX_INST_LEN);
- skip_loc = code->cur + 1;
- jcc(code, cond, code->cur + 2);
- }
- if (opts->dregs[inst->dst.params.regs.pri] >= 0) {
- sub_ir(code, 1, opts->dregs[inst->dst.params.regs.pri], SZ_W);
- cmp_ir(code, -1, opts->dregs[inst->dst.params.regs.pri], SZ_W);
- } else {
- sub_irdisp(code, 1, opts->gen.context_reg, offsetof(m68k_context, dregs) + 4 * inst->dst.params.regs.pri, SZ_W);
- cmp_irdisp(code, -1, opts->gen.context_reg, offsetof(m68k_context, dregs) + 4 * inst->dst.params.regs.pri, SZ_W);
- }
- code_ptr loop_end_loc = code->cur + 1;
- jcc(code, CC_Z, code->cur + 2);
- uint32_t after = inst->address + 2;
- code_ptr dest_addr = get_native_address(opts->gen.native_code_map, after + inst->src.params.immed);
- if (!dest_addr) {
- opts->gen.deferred = defer_address(opts->gen.deferred, after + inst->src.params.immed, code->cur + 1);
- //dummy address to be replaced later, make sure it generates a 4-byte displacement
- dest_addr = code->cur + 256;
- }
- jmp(code, dest_addr);
- *loop_end_loc = code->cur - (loop_end_loc+1);
- if (skip_loc) {
- cycles(&opts->gen, 2);
- *skip_loc = code->cur - (skip_loc+1);
- cycles(&opts->gen, 2);
- } else {
- cycles(&opts->gen, 4);
- }
-}
-
-void translate_m68k_link(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- int8_t reg = native_reg(&(inst->src), opts);
- //compensate for displacement word
- cycles(&opts->gen, BUS);
- sub_ir(code, 4, opts->aregs[7], SZ_D);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- if (reg >= 0) {
- mov_rr(code, reg, opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_D);
- }
- call(code, opts->write_32_highfirst);
- if (reg >= 0) {
- mov_rr(code, opts->aregs[7], reg, SZ_D);
- } else {
- mov_rrdisp(code, opts->aregs[7], opts->gen.context_reg, reg_offset(&(inst->src)), SZ_D);
- }
- add_ir(code, inst->dst.params.immed, opts->aregs[7], SZ_D);
- //prefetch
- cycles(&opts->gen, BUS);
-}
-
-void translate_m68k_movep(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- int8_t reg;
- cycles(&opts->gen, BUS*2);
- if (inst->src.addr_mode == MODE_REG) {
- if (opts->aregs[inst->dst.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->dst.params.regs.pri], opts->gen.scratch2, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->dst)), opts->gen.scratch2, SZ_D);
- }
- if (inst->dst.params.regs.displacement) {
- add_ir(code, inst->dst.params.regs.displacement, opts->gen.scratch2, SZ_D);
- }
- reg = native_reg(&(inst->src), opts);
- if (inst->extra.size == OPSIZE_LONG) {
- if (reg >= 0) {
- mov_rr(code, reg, opts->gen.scratch1, SZ_D);
- shr_ir(code, 24, opts->gen.scratch1, SZ_D);
- push_r(code, opts->gen.scratch2);
- call(code, opts->write_8);
- pop_r(code, opts->gen.scratch2);
- mov_rr(code, reg, opts->gen.scratch1, SZ_D);
- shr_ir(code, 16, opts->gen.scratch1, SZ_D);
-
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src))+3, opts->gen.scratch1, SZ_B);
- push_r(code, opts->gen.scratch2);
- call(code, opts->write_8);
- pop_r(code, opts->gen.scratch2);
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src))+2, opts->gen.scratch1, SZ_B);
- }
- add_ir(code, 2, opts->gen.scratch2, SZ_D);
- push_r(code, opts->gen.scratch2);
- call(code, opts->write_8);
- pop_r(code, opts->gen.scratch2);
- add_ir(code, 2, opts->gen.scratch2, SZ_D);
- }
- if (reg >= 0) {
- mov_rr(code, reg, opts->gen.scratch1, SZ_W);
- shr_ir(code, 8, opts->gen.scratch1, SZ_W);
- push_r(code, opts->gen.scratch2);
- call(code, opts->write_8);
- pop_r(code, opts->gen.scratch2);
- mov_rr(code, reg, opts->gen.scratch1, SZ_W);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src))+1, opts->gen.scratch1, SZ_B);
- push_r(code, opts->gen.scratch2);
- call(code, opts->write_8);
- pop_r(code, opts->gen.scratch2);
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_B);
- }
- add_ir(code, 2, opts->gen.scratch2, SZ_D);
- call(code, opts->write_8);
- } else {
- if (opts->aregs[inst->src.params.regs.pri] >= 0) {
- mov_rr(code, opts->aregs[inst->src.params.regs.pri], opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, reg_offset(&(inst->src)), opts->gen.scratch1, SZ_D);
- }
- if (inst->src.params.regs.displacement) {
- add_ir(code, inst->src.params.regs.displacement, opts->gen.scratch1, SZ_D);
- }
- reg = native_reg(&(inst->dst), opts);
- if (inst->extra.size == OPSIZE_LONG) {
- if (reg >= 0) {
- push_r(code, opts->gen.scratch1);
- call(code, opts->read_8);
- shl_ir(code, 24, opts->gen.scratch1, SZ_D);
- mov_rr(code, opts->gen.scratch1, reg, SZ_D);
- pop_r(code, opts->gen.scratch1);
- add_ir(code, 2, opts->gen.scratch1, SZ_D);
- push_r(code, opts->gen.scratch1);
- call(code, opts->read_8);
- shl_ir(code, 16, opts->gen.scratch1, SZ_D);
- or_rr(code, opts->gen.scratch1, reg, SZ_D);
- } else {
- push_r(code, opts->gen.scratch1);
- call(code, opts->read_8);
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, reg_offset(&(inst->dst))+3, SZ_B);
- pop_r(code, opts->gen.scratch1);
- add_ir(code, 2, opts->gen.scratch1, SZ_D);
- push_r(code, opts->gen.scratch1);
- call(code, opts->read_8);
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, reg_offset(&(inst->dst))+2, SZ_B);
- }
- pop_r(code, opts->gen.scratch1);
- add_ir(code, 2, opts->gen.scratch1, SZ_D);
- }
- push_r(code, opts->gen.scratch1);
- call(code, opts->read_8);
- if (reg >= 0) {
-
- shl_ir(code, 8, opts->gen.scratch1, SZ_W);
- mov_rr(code, opts->gen.scratch1, reg, SZ_W);
- pop_r(code, opts->gen.scratch1);
- add_ir(code, 2, opts->gen.scratch1, SZ_D);
- call(code, opts->read_8);
- mov_rr(code, opts->gen.scratch1, reg, SZ_B);
- } else {
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, reg_offset(&(inst->dst))+1, SZ_B);
- pop_r(code, opts->gen.scratch1);
- add_ir(code, 2, opts->gen.scratch1, SZ_D);
- call(code, opts->read_8);
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, reg_offset(&(inst->dst)), SZ_B);
- }
- }
-}
-
-void translate_m68k_cmp(m68k_options * opts, m68kinst * inst)
-{
- code_info *code = &opts->gen.code;
- uint8_t size = inst->extra.size;
- x86_ea src_op, dst_op;
- translate_m68k_src(inst, &src_op, opts);
- if (inst->dst.addr_mode == MODE_AREG_POSTINC) {
- push_r(code, opts->gen.scratch1);
- translate_m68k_dst(inst, &dst_op, opts, 0);
- pop_r(code, opts->gen.scratch2);
- src_op.base = opts->gen.scratch2;
- } else {
- translate_m68k_dst(inst, &dst_op, opts, 0);
- if (inst->dst.addr_mode == MODE_AREG && size == OPSIZE_WORD) {
- size = OPSIZE_LONG;
- }
- }
- cycles(&opts->gen, BUS);
- if (src_op.mode == MODE_REG_DIRECT) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- cmp_rr(code, src_op.base, dst_op.base, size);
- } else {
- cmp_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, size);
- }
- } else if (src_op.mode == MODE_REG_DISPLACE8) {
- cmp_rdispr(code, src_op.base, src_op.disp, dst_op.base, size);
- } else {
- if (dst_op.mode == MODE_REG_DIRECT) {
- cmp_ir(code, src_op.disp, dst_op.base, size);
- } else {
- cmp_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, size);
- }
- }
- set_flag_cond(opts, CC_C, FLAG_C);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag_cond(opts, CC_O, FLAG_V);
-}
-
-typedef void (*shift_ir_t)(code_info *code, uint8_t val, uint8_t dst, uint8_t size);
-typedef void (*shift_irdisp_t)(code_info *code, uint8_t val, uint8_t dst_base, int32_t disp, uint8_t size);
-typedef void (*shift_clr_t)(code_info *code, uint8_t dst, uint8_t size);
-typedef void (*shift_clrdisp_t)(code_info *code, uint8_t dst_base, int32_t disp, uint8_t size);
-
-void translate_shift(m68k_options * opts, m68kinst * inst, x86_ea *src_op, x86_ea * dst_op, shift_ir_t shift_ir, shift_irdisp_t shift_irdisp, shift_clr_t shift_clr, shift_clrdisp_t shift_clrdisp, shift_ir_t special, shift_irdisp_t special_disp)
-{
- code_info *code = &opts->gen.code;
- code_ptr end_off = NULL;
- code_ptr nz_off = NULL;
- code_ptr z_off = NULL;
- if (inst->src.addr_mode == MODE_UNUSED) {
- cycles(&opts->gen, BUS);
- //Memory shift
- shift_ir(code, 1, dst_op->base, SZ_W);
- } else {
- cycles(&opts->gen, inst->extra.size == OPSIZE_LONG ? 8 : 6);
- if (src_op->mode == MODE_IMMED) {
- if (src_op->disp != 1 && inst->op == M68K_ASL) {
- set_flag(opts, 0, FLAG_V);
- for (int i = 0; i < src_op->disp; i++) {
- if (dst_op->mode == MODE_REG_DIRECT) {
- shift_ir(code, 1, dst_op->base, inst->extra.size);
- } else {
- shift_irdisp(code, 1, dst_op->base, dst_op->disp, inst->extra.size);
- }
- check_alloc_code(code, 2*MAX_INST_LEN);
- code_ptr after_flag_set = code->cur + 1;
- jcc(code, CC_NO, code->cur + 2);
- set_flag(opts, 1, FLAG_V);
- *after_flag_set = code->cur - (after_flag_set+1);
- }
- } else {
- if (dst_op->mode == MODE_REG_DIRECT) {
- shift_ir(code, src_op->disp, dst_op->base, inst->extra.size);
- } else {
- shift_irdisp(code, src_op->disp, dst_op->base, dst_op->disp, inst->extra.size);
- }
- set_flag_cond(opts, CC_O, FLAG_V);
- }
- } else {
- if (src_op->base != RCX) {
- if (src_op->mode == MODE_REG_DIRECT) {
- mov_rr(code, src_op->base, RCX, SZ_B);
- } else {
- mov_rdispr(code, src_op->base, src_op->disp, RCX, SZ_B);
- }
-
- }
- and_ir(code, 63, RCX, SZ_D);
- check_alloc_code(code, 7*MAX_INST_LEN);
- nz_off = code->cur + 1;
- jcc(code, CC_NZ, code->cur + 2);
- //Flag behavior for shift count of 0 is different for x86 than 68K
- if (dst_op->mode == MODE_REG_DIRECT) {
- cmp_ir(code, 0, dst_op->base, inst->extra.size);
- } else {
- cmp_irdisp(code, 0, dst_op->base, dst_op->disp, inst->extra.size);
- }
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag(opts, 0, FLAG_C);
- //For other instructions, this flag will be set below
- if (inst->op == M68K_ASL) {
- set_flag(opts, 0, FLAG_V);
- }
- z_off = code->cur + 1;
- jmp(code, code->cur + 2);
- *nz_off = code->cur - (nz_off + 1);
- //add 2 cycles for every bit shifted
- add_rr(code, RCX, CYCLES, SZ_D);
- add_rr(code, RCX, CYCLES, SZ_D);
- if (inst->op == M68K_ASL) {
- //ASL has Overflow flag behavior that depends on all of the bits shifted through the MSB
- //Easiest way to deal with this is to shift one bit at a time
- set_flag(opts, 0, FLAG_V);
- check_alloc_code(code, 5*MAX_INST_LEN);
- code_ptr loop_start = code->cur;
- if (dst_op->mode == MODE_REG_DIRECT) {
- shift_ir(code, 1, dst_op->base, inst->extra.size);
- } else {
- shift_irdisp(code, 1, dst_op->base, dst_op->disp, inst->extra.size);
- }
- code_ptr after_flag_set = code->cur + 1;
- jcc(code, CC_NO, code->cur + 2);
- set_flag(opts, 1, FLAG_V);
- *after_flag_set = code->cur - (after_flag_set+1);
- loop(code, loop_start);
- } else {
- //x86 shifts modulo 32 for operand sizes less than 64-bits
- //but M68K shifts modulo 64, so we need to check for large shifts here
- cmp_ir(code, 32, RCX, SZ_B);
- check_alloc_code(code, 14*MAX_INST_LEN);
- code_ptr norm_shift_off = code->cur + 1;
- jcc(code, CC_L, code->cur + 2);
- if (special) {
- code_ptr after_flag_set = NULL;
- if (inst->extra.size == OPSIZE_LONG) {
- code_ptr neq_32_off = code->cur + 1;
- jcc(code, CC_NZ, code->cur + 2);
-
- //set the carry bit to the lsb
- if (dst_op->mode == MODE_REG_DIRECT) {
- special(code, 1, dst_op->base, SZ_D);
- } else {
- special_disp(code, 1, dst_op->base, dst_op->disp, SZ_D);
- }
- set_flag_cond(opts, CC_C, FLAG_C);
- after_flag_set = code->cur + 1;
- jmp(code, code->cur + 2);
- *neq_32_off = code->cur - (neq_32_off+1);
- }
- set_flag(opts, 0, FLAG_C);
- if (after_flag_set) {
- *after_flag_set = code->cur - (after_flag_set+1);
- }
- set_flag(opts, 1, FLAG_Z);
- set_flag(opts, 0, FLAG_N);
- if (dst_op->mode == MODE_REG_DIRECT) {
- xor_rr(code, dst_op->base, dst_op->base, inst->extra.size);
- } else {
- mov_irdisp(code, 0, dst_op->base, dst_op->disp, inst->extra.size);
- }
- } else {
- if (dst_op->mode == MODE_REG_DIRECT) {
- shift_ir(code, 31, dst_op->base, inst->extra.size);
- shift_ir(code, 1, dst_op->base, inst->extra.size);
- } else {
- shift_irdisp(code, 31, dst_op->base, dst_op->disp, inst->extra.size);
- shift_irdisp(code, 1, dst_op->base, dst_op->disp, inst->extra.size);
- }
-
- }
- end_off = code->cur + 1;
- jmp(code, code->cur + 2);
- *norm_shift_off = code->cur - (norm_shift_off+1);
- if (dst_op->mode == MODE_REG_DIRECT) {
- shift_clr(code, dst_op->base, inst->extra.size);
- } else {
- shift_clrdisp(code, dst_op->base, dst_op->disp, inst->extra.size);
- }
- }
- }
-
- }
- if (!special && end_off) {
- *end_off = code->cur - (end_off + 1);
- }
- set_flag_cond(opts, CC_C, FLAG_C);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- if (special && end_off) {
- *end_off = code->cur - (end_off + 1);
- }
- //set X flag to same as C flag
- if (opts->flag_regs[FLAG_C] >= 0) {
- flag_to_flag(opts, FLAG_C, FLAG_X);
- } else {
- set_flag_cond(opts, CC_C, FLAG_X);
- }
- if (z_off) {
- *z_off = code->cur - (z_off + 1);
- }
- if (inst->op != M68K_ASL) {
- set_flag(opts, 0, FLAG_V);
- }
- if (inst->src.addr_mode == MODE_UNUSED) {
- m68k_save_result(inst, opts);
- }
-}
-
-#define BIT_SUPERVISOR 5
-
-void translate_m68k(m68k_options * opts, m68kinst * inst)
-{
- code_ptr end_off, zero_off, norm_off;
- uint8_t dst_reg;
- code_info *code = &opts->gen.code;
- check_cycles_int(&opts->gen, inst->address);
- if (inst->op == M68K_MOVE) {
- return translate_m68k_move(opts, inst);
- } else if(inst->op == M68K_LEA) {
- return translate_m68k_lea(opts, inst);
- } else if(inst->op == M68K_PEA) {
- return translate_m68k_pea(opts, inst);
- } else if(inst->op == M68K_BSR) {
- return translate_m68k_bsr(opts, inst);
- } else if(inst->op == M68K_BCC) {
- return translate_m68k_bcc(opts, inst);
- } else if(inst->op == M68K_JMP) {
- return translate_m68k_jmp_jsr(opts, inst);
- } else if(inst->op == M68K_JSR) {
- return translate_m68k_jmp_jsr(opts, inst);
- } else if(inst->op == M68K_RTS) {
- return translate_m68k_rts(opts, inst);
- } else if(inst->op == M68K_DBCC) {
- return translate_m68k_dbcc(opts, inst);
- } else if(inst->op == M68K_CLR) {
- return translate_m68k_clr(opts, inst);
- } else if(inst->op == M68K_MOVEM) {
- return translate_m68k_movem(opts, inst);
- } else if(inst->op == M68K_LINK) {
- return translate_m68k_link(opts, inst);
- } else if(inst->op == M68K_EXT) {
- return translate_m68k_ext(opts, inst);
- } else if(inst->op == M68K_SCC) {
- return translate_m68k_scc(opts, inst);
- } else if(inst->op == M68K_MOVEP) {
- return translate_m68k_movep(opts, inst);
- } else if(inst->op == M68K_INVALID) {
- if (inst->src.params.immed == 0x7100) {
- return retn(code);
- }
- mov_ir(code, inst->address, opts->gen.scratch1, SZ_D);
- return call(code, (code_ptr)m68k_invalid);
- } else if(inst->op == M68K_CMP) {
- return translate_m68k_cmp(opts, inst);
- }
- x86_ea src_op, dst_op;
- if (inst->src.addr_mode != MODE_UNUSED) {
- translate_m68k_src(inst, &src_op, opts);
- }
- if (inst->dst.addr_mode != MODE_UNUSED) {
- translate_m68k_dst(inst, &dst_op, opts, 0);
- }
- uint8_t size;
- switch(inst->op)
- {
- case M68K_ABCD:
- if (src_op.base != opts->gen.scratch2) {
- if (src_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, src_op.base, opts->gen.scratch2, SZ_B);
- } else {
- mov_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch2, SZ_B);
- }
- }
- if (dst_op.base != opts->gen.scratch1) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, dst_op.base, opts->gen.scratch1, SZ_B);
- } else {
- mov_rdispr(code, dst_op.base, dst_op.disp, opts->gen.scratch1, SZ_B);
- }
- }
- flag_to_carry(opts, FLAG_X);
- jcc(code, CC_NC, code->cur + 5);
- add_ir(code, 1, opts->gen.scratch1, SZ_B);
- call(code, (code_ptr)bcd_add);
- reg_to_flag(opts, CH, FLAG_C);
- reg_to_flag(opts, CH, FLAG_X);
- cmp_ir(code, 0, opts->gen.scratch1, SZ_B);
- jcc(code, CC_Z, code->cur + 4);
- set_flag(opts, 0, FLAG_Z);
- if (dst_op.base != opts->gen.scratch1) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, opts->gen.scratch1, dst_op.base, SZ_B);
- } else {
- mov_rrdisp(code, opts->gen.scratch1, dst_op.base, dst_op.disp, SZ_B);
- }
- }
- m68k_save_result(inst, opts);
- break;
- case M68K_ADD:
- cycles(&opts->gen, BUS);
- size = inst->dst.addr_mode == MODE_AREG ? OPSIZE_LONG : inst->extra.size;
- if (src_op.mode == MODE_REG_DIRECT) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- add_rr(code, src_op.base, dst_op.base, size);
- } else {
- add_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, size);
- }
- } else if (src_op.mode == MODE_REG_DISPLACE8) {
- add_rdispr(code, src_op.base, src_op.disp, dst_op.base, size);
- } else {
- if (dst_op.mode == MODE_REG_DIRECT) {
- add_ir(code, src_op.disp, dst_op.base, size);
- } else {
- add_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, size);
- }
- }
- if (inst->dst.addr_mode != MODE_AREG) {
- set_flag_cond(opts, CC_C, FLAG_C);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag_cond(opts, CC_O, FLAG_V);
- if (opts->flag_regs[FLAG_C] >= 0) {
- flag_to_flag(opts, FLAG_C, FLAG_X);
- } else {
- set_flag_cond(opts, CC_C, FLAG_X);
- }
- }
- m68k_save_result(inst, opts);
- break;
- case M68K_ADDX: {
- cycles(&opts->gen, BUS);
- flag_to_carry(opts, FLAG_X);
- if (src_op.mode == MODE_REG_DIRECT) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- adc_rr(code, src_op.base, dst_op.base, inst->extra.size);
- } else {
- adc_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, inst->extra.size);
- }
- } else if (src_op.mode == MODE_REG_DISPLACE8) {
- adc_rdispr(code, src_op.base, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- if (dst_op.mode == MODE_REG_DIRECT) {
- adc_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- adc_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- set_flag_cond(opts, CC_C, FLAG_C);
-
- check_alloc_code(code, 2*MAX_INST_LEN);
- code_ptr after_flag_set = code->cur + 1;
- jcc(code, CC_Z, code->cur + 2);
- set_flag(opts, 0, FLAG_Z);
- *after_flag_set = code->cur - (after_flag_set+1);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag_cond(opts, CC_O, FLAG_V);
- if (opts->flag_regs[FLAG_C] >= 0) {
- flag_to_flag(opts, FLAG_C, FLAG_X);
- } else {
- set_flag_cond(opts, CC_C, FLAG_X);
- }
- m68k_save_result(inst, opts);
- break;
- }
- case M68K_AND:
- cycles(&opts->gen, BUS);
- if (src_op.mode == MODE_REG_DIRECT) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- and_rr(code, src_op.base, dst_op.base, inst->extra.size);
- } else {
- and_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, inst->extra.size);
- }
- } else if (src_op.mode == MODE_REG_DISPLACE8) {
- and_rdispr(code, src_op.base, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- if (dst_op.mode == MODE_REG_DIRECT) {
- and_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- and_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- set_flag(opts, 0, FLAG_C);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag(opts, 0, FLAG_V);
- m68k_save_result(inst, opts);
- break;
- case M68K_ANDI_CCR:
- case M68K_ANDI_SR:
- cycles(&opts->gen, 20);
- //TODO: If ANDI to SR, trap if not in supervisor mode
- if (!(inst->src.params.immed & 0x1)) {
- set_flag(opts, 0, FLAG_C);
- }
- if (!(inst->src.params.immed & 0x2)) {
- set_flag(opts, 0, FLAG_V);
- }
- if (!(inst->src.params.immed & 0x4)) {
- set_flag(opts, 0, FLAG_Z);
- }
- if (!(inst->src.params.immed & 0x8)) {
- set_flag(opts, 0, FLAG_N);
- }
- if (!(inst->src.params.immed & 0x10)) {
- set_flag(opts, 0, FLAG_X);
- }
- if (inst->op == M68K_ANDI_SR) {
- and_irdisp(code, inst->src.params.immed >> 8, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- if (!((inst->src.params.immed >> 8) & (1 << BIT_SUPERVISOR))) {
- //leave supervisor mode
- mov_rr(code, opts->aregs[7], opts->gen.scratch1, SZ_B);
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, opts->aregs[7], SZ_B);
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, SZ_B);
- }
- if (inst->src.params.immed & 0x700) {
- call(code, opts->do_sync);
- }
- }
- break;
- case M68K_ASL:
- case M68K_LSL:
- translate_shift(opts, inst, &src_op, &dst_op, shl_ir, shl_irdisp, shl_clr, shl_clrdisp, shr_ir, shr_irdisp);
- break;
- case M68K_ASR:
- translate_shift(opts, inst, &src_op, &dst_op, sar_ir, sar_irdisp, sar_clr, sar_clrdisp, NULL, NULL);
- break;
- case M68K_LSR:
- translate_shift(opts, inst, &src_op, &dst_op, shr_ir, shr_irdisp, shr_clr, shr_clrdisp, shl_ir, shl_irdisp);
- break;
- case M68K_BCHG:
- case M68K_BCLR:
- case M68K_BSET:
- case M68K_BTST:
- cycles(&opts->gen, inst->extra.size == OPSIZE_BYTE ? 4 : (
- inst->op == M68K_BTST ? 6 : (inst->op == M68K_BCLR ? 10 : 8))
- );
- if (src_op.mode == MODE_IMMED) {
- if (inst->extra.size == OPSIZE_BYTE) {
- src_op.disp &= 0x7;
- }
- if (inst->op == M68K_BTST) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- bt_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- bt_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- }
- } else if (inst->op == M68K_BSET) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- bts_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- bts_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- }
- } else if (inst->op == M68K_BCLR) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- btr_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- btr_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- }
- } else {
- if (dst_op.mode == MODE_REG_DIRECT) {
- btc_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- btc_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- } else {
- if (src_op.mode == MODE_REG_DISPLACE8 || (inst->dst.addr_mode != MODE_REG && src_op.base != opts->gen.scratch1 && src_op.base != opts->gen.scratch2)) {
- if (dst_op.base == opts->gen.scratch1) {
- push_r(code, opts->gen.scratch2);
- if (src_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, src_op.base, opts->gen.scratch2, SZ_B);
- } else {
- mov_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch2, SZ_B);
- }
- src_op.base = opts->gen.scratch2;
- } else {
- if (src_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, src_op.base, opts->gen.scratch1, SZ_B);
- } else {
- mov_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch1, SZ_B);
- }
- src_op.base = opts->gen.scratch1;
- }
- }
- uint8_t size = inst->extra.size;
- if (dst_op.mode == MODE_REG_DISPLACE8) {
- if (src_op.base != opts->gen.scratch1 && src_op.base != opts->gen.scratch2) {
- if (src_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, src_op.base, opts->gen.scratch1, SZ_D);
- } else {
- mov_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch1, SZ_D);
- src_op.mode = MODE_REG_DIRECT;
- }
- src_op.base = opts->gen.scratch1;
- }
- //b### with register destination is modulo 32
- //x86 with a memory destination isn't modulo anything
- //so use an and here to force the value to be modulo 32
- and_ir(code, 31, opts->gen.scratch1, SZ_D);
- } else if(inst->dst.addr_mode != MODE_REG) {
- //b### with memory destination is modulo 8
- //x86-64 doesn't support 8-bit bit operations
- //so we fake it by forcing the bit number to be modulo 8
- and_ir(code, 7, src_op.base, SZ_D);
- size = SZ_D;
- }
- if (inst->op == M68K_BTST) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- bt_rr(code, src_op.base, dst_op.base, size);
- } else {
- bt_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, size);
- }
- } else if (inst->op == M68K_BSET) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- bts_rr(code, src_op.base, dst_op.base, size);
- } else {
- bts_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, size);
- }
- } else if (inst->op == M68K_BCLR) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- btr_rr(code, src_op.base, dst_op.base, size);
- } else {
- btr_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, size);
- }
- } else {
- if (dst_op.mode == MODE_REG_DIRECT) {
- btc_rr(code, src_op.base, dst_op.base, size);
- } else {
- btc_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, size);
- }
- }
- if (src_op.base == opts->gen.scratch2) {
- pop_r(code, opts->gen.scratch2);
- }
- }
- //x86 sets the carry flag to the value of the bit tested
- //68K sets the zero flag to the complement of the bit tested
- set_flag_cond(opts, CC_NC, FLAG_Z);
- if (inst->op != M68K_BTST) {
- m68k_save_result(inst, opts);
- }
- break;
- case M68K_CHK:
- {
- cycles(&opts->gen, 6);
- if (dst_op.mode == MODE_REG_DIRECT) {
- cmp_ir(code, 0, dst_op.base, inst->extra.size);
- } else {
- cmp_irdisp(code, 0, dst_op.base, dst_op.disp, inst->extra.size);
- }
- uint32_t isize;
- switch(inst->src.addr_mode)
- {
- case MODE_AREG_DISPLACE:
- case MODE_AREG_INDEX_DISP8:
- case MODE_ABSOLUTE_SHORT:
- case MODE_PC_INDEX_DISP8:
- case MODE_PC_DISPLACE:
- case MODE_IMMEDIATE:
- isize = 4;
- break;
- case MODE_ABSOLUTE:
- isize = 6;
- break;
- default:
- isize = 2;
- }
- //make sure we won't start a new chunk in the middle of these branches
- check_alloc_code(code, MAX_INST_LEN * 11);
- code_ptr passed = code->cur + 1;
- jcc(code, CC_GE, code->cur + 2);
- set_flag(opts, 1, FLAG_N);
- mov_ir(code, VECTOR_CHK, opts->gen.scratch2, SZ_D);
- mov_ir(code, inst->address+isize, opts->gen.scratch1, SZ_D);
- jmp(code, opts->trap);
- *passed = code->cur - (passed+1);
- if (dst_op.mode == MODE_REG_DIRECT) {
- if (src_op.mode == MODE_REG_DIRECT) {
- cmp_rr(code, src_op.base, dst_op.base, inst->extra.size);
- } else if(src_op.mode == MODE_REG_DISPLACE8) {
- cmp_rdispr(code, src_op.base, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- cmp_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- }
- } else if(dst_op.mode == MODE_REG_DISPLACE8) {
- if (src_op.mode == MODE_REG_DIRECT) {
- cmp_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, inst->extra.size);
- } else {
- cmp_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- passed = code->cur + 1;
- jcc(code, CC_LE, code->cur + 2);
- set_flag(opts, 0, FLAG_N);
- mov_ir(code, VECTOR_CHK, opts->gen.scratch2, SZ_D);
- mov_ir(code, inst->address+isize, opts->gen.scratch1, SZ_D);
- jmp(code, opts->trap);
- *passed = code->cur - (passed+1);
- cycles(&opts->gen, 4);
- break;
- }
- case M68K_DIVS:
- case M68K_DIVU:
- {
- check_alloc_code(code, MAX_NATIVE_SIZE);
- //TODO: cycle exact division
- cycles(&opts->gen, inst->op == M68K_DIVS ? 158 : 140);
- set_flag(opts, 0, FLAG_C);
- push_r(code, RDX);
- push_r(code, RAX);
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, dst_op.base, RAX, SZ_D);
- } else {
- mov_rdispr(code, dst_op.base, dst_op.disp, RAX, SZ_D);
- }
- if (src_op.mode == MODE_IMMED) {
- mov_ir(code, (src_op.disp & 0x8000) && inst->op == M68K_DIVS ? src_op.disp | 0xFFFF0000 : src_op.disp, opts->gen.scratch2, SZ_D);
- } else if (src_op.mode == MODE_REG_DIRECT) {
- if (inst->op == M68K_DIVS) {
- movsx_rr(code, src_op.base, opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movzx_rr(code, src_op.base, opts->gen.scratch2, SZ_W, SZ_D);
- }
- } else if (src_op.mode == MODE_REG_DISPLACE8) {
- if (inst->op == M68K_DIVS) {
- movsx_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movzx_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch2, SZ_W, SZ_D);
- }
- }
- cmp_ir(code, 0, opts->gen.scratch2, SZ_D);
- check_alloc_code(code, 6*MAX_INST_LEN);
- code_ptr not_zero = code->cur + 1;
- jcc(code, CC_NZ, code->cur + 2);
- pop_r(code, RAX);
- pop_r(code, RDX);
- mov_ir(code, VECTOR_INT_DIV_ZERO, opts->gen.scratch2, SZ_D);
- mov_ir(code, inst->address+2, opts->gen.scratch1, SZ_D);
- jmp(code, opts->trap);
- *not_zero = code->cur - (not_zero+1);
- if (inst->op == M68K_DIVS) {
- cdq(code);
- } else {
- xor_rr(code, RDX, RDX, SZ_D);
- }
- if (inst->op == M68K_DIVS) {
- idiv_r(code, opts->gen.scratch2, SZ_D);
- } else {
- div_r(code, opts->gen.scratch2, SZ_D);
- }
- code_ptr skip_sec_check;
- if (inst->op == M68K_DIVS) {
- cmp_ir(code, 0x8000, RAX, SZ_D);
- skip_sec_check = code->cur + 1;
- jcc(code, CC_GE, code->cur + 2);
- cmp_ir(code, -0x8000, RAX, SZ_D);
- norm_off = code->cur + 1;
- jcc(code, CC_L, code->cur + 2);
- } else {
- cmp_ir(code, 0x10000, RAX, SZ_D);
- norm_off = code->cur + 1;
- jcc(code, CC_NC, code->cur + 2);
- }
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, RDX, dst_op.base, SZ_W);
- shl_ir(code, 16, dst_op.base, SZ_D);
- mov_rr(code, RAX, dst_op.base, SZ_W);
- } else {
- mov_rrdisp(code, RDX, dst_op.base, dst_op.disp, SZ_W);
- shl_irdisp(code, 16, dst_op.base, dst_op.disp, SZ_D);
- mov_rrdisp(code, RAX, dst_op.base, dst_op.disp, SZ_W);
- }
- cmp_ir(code, 0, RAX, SZ_W);
- pop_r(code, RAX);
- pop_r(code, RDX);
- set_flag(opts, 0, FLAG_V);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- end_off = code->cur + 1;
- jmp(code, code->cur + 2);
- *norm_off = code->cur - (norm_off + 1);
- if (inst->op == M68K_DIVS) {
- *skip_sec_check = code->cur - (skip_sec_check+1);
- }
- pop_r(code, RAX);
- pop_r(code, RDX);
- set_flag(opts, 1, FLAG_V);
- *end_off = code->cur - (end_off + 1);
- break;
- }
- case M68K_EOR:
- cycles(&opts->gen, BUS);
- if (src_op.mode == MODE_REG_DIRECT) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- xor_rr(code, src_op.base, dst_op.base, inst->extra.size);
- } else {
- xor_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, inst->extra.size);
- }
- } else if (src_op.mode == MODE_REG_DISPLACE8) {
- xor_rdispr(code, src_op.base, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- if (dst_op.mode == MODE_REG_DIRECT) {
- xor_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- xor_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- set_flag(opts, 0, FLAG_C);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag(opts, 0, FLAG_V);
- m68k_save_result(inst, opts);
- break;
- case M68K_EORI_CCR:
- case M68K_EORI_SR:
- cycles(&opts->gen, 20);
- //TODO: If ANDI to SR, trap if not in supervisor mode
- if (inst->src.params.immed & 0x1) {
- xor_flag(opts, 1, FLAG_C);
- }
- if (inst->src.params.immed & 0x2) {
- xor_flag(opts, 1, FLAG_V);
- }
- if (inst->src.params.immed & 0x4) {
- xor_flag(opts, 1, FLAG_Z);
- }
- if (inst->src.params.immed & 0x8) {
- xor_flag(opts, 1, FLAG_N);
- }
- if (inst->src.params.immed & 0x10) {
- xor_flag(opts, 1, FLAG_X);
- }
- if (inst->op == M68K_ORI_SR) {
- xor_irdisp(code, inst->src.params.immed >> 8, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- if (inst->src.params.immed & 0x700) {
- call(code, opts->do_sync);
- }
- }
- break;
- case M68K_EXG:
- cycles(&opts->gen, 6);
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, dst_op.base, opts->gen.scratch2, SZ_D);
- if (src_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, src_op.base, dst_op.base, SZ_D);
- mov_rr(code, opts->gen.scratch2, src_op.base, SZ_D);
- } else {
- mov_rdispr(code, src_op.base, src_op.disp, dst_op.base, SZ_D);
- mov_rrdisp(code, opts->gen.scratch2, src_op.base, src_op.disp, SZ_D);
- }
- } else {
- mov_rdispr(code, dst_op.base, dst_op.disp, opts->gen.scratch2, SZ_D);
- if (src_op.mode == MODE_REG_DIRECT) {
- mov_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, SZ_D);
- mov_rr(code, opts->gen.scratch2, src_op.base, SZ_D);
- } else {
- mov_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch1, SZ_D);
- mov_rrdisp(code, opts->gen.scratch1, dst_op.base, dst_op.disp, SZ_D);
- mov_rrdisp(code, opts->gen.scratch2, src_op.base, src_op.disp, SZ_D);
- }
- }
- break;
- case M68K_ILLEGAL:
- call(code, opts->gen.save_context);
-#ifdef X86_64
- mov_rr(code, opts->gen.context_reg, RDI, SZ_PTR);
-#else
- push_r(code, opts->gen.context_reg);
-#endif
- call(code, (code_ptr)print_regs_exit);
- break;
- case M68K_MOVE_FROM_SR:
- //TODO: Trap if not in system mode
- call(code, opts->get_sr);
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, opts->gen.scratch1, dst_op.base, SZ_W);
- } else {
- mov_rrdisp(code, opts->gen.scratch1, dst_op.base, dst_op.disp, SZ_W);
- }
- m68k_save_result(inst, opts);
- break;
- case M68K_MOVE_CCR:
- case M68K_MOVE_SR:
- //TODO: Privilege check for MOVE to SR
- if (src_op.mode == MODE_IMMED) {
- set_flag(opts, src_op.disp & 0x1, FLAG_C);
- set_flag(opts, (src_op.disp >> 1) & 0x1, FLAG_V);
- set_flag(opts, (src_op.disp >> 2) & 0x1, FLAG_Z);
- set_flag(opts, (src_op.disp >> 3) & 0x1, FLAG_N);
- set_flag(opts, (src_op.disp >> 4) & 0x1, FLAG_X);
- if (inst->op == M68K_MOVE_SR) {
- mov_irdisp(code, (src_op.disp >> 8), opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- if (!((inst->src.params.immed >> 8) & (1 << BIT_SUPERVISOR))) {
- //leave supervisor mode
- mov_rr(code, opts->aregs[7], opts->gen.scratch1, SZ_D);
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, opts->aregs[7], SZ_D);
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, SZ_D);
- }
- call(code, opts->do_sync);
- }
- cycles(&opts->gen, 12);
- } else {
- if (src_op.base != opts->gen.scratch1) {
- if (src_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, src_op.base, opts->gen.scratch1, SZ_W);
- } else {
- mov_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch1, SZ_W);
- }
- }
- call(code, inst->op == M68K_MOVE_SR ? opts->set_sr : opts->set_ccr);
- cycles(&opts->gen, 12);
-
- }
- break;
- case M68K_MOVE_USP:
- cycles(&opts->gen, BUS);
- //TODO: Trap if not in supervisor mode
- //bt_irdisp(code, BIT_SUPERVISOR, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- if (inst->src.addr_mode == MODE_UNUSED) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, dst_op.base, SZ_D);
- } else {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, opts->gen.scratch1, SZ_D);
- mov_rrdisp(code, opts->gen.scratch1, dst_op.base, dst_op.disp, SZ_D);
- }
- } else {
- if (src_op.mode == MODE_REG_DIRECT) {
- mov_rrdisp(code, src_op.base, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, SZ_D);
- } else {
- mov_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch1, SZ_D);
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, SZ_D);
- }
- }
- break;
- //case M68K_MOVEP:
- case M68K_MULS:
- case M68K_MULU:
- cycles(&opts->gen, 70); //TODO: Calculate the actual value based on the value of the <ea> parameter
- if (src_op.mode == MODE_IMMED) {
- mov_ir(code, inst->op == M68K_MULU ? (src_op.disp & 0xFFFF) : ((src_op.disp & 0x8000) ? src_op.disp | 0xFFFF0000 : src_op.disp), opts->gen.scratch1, SZ_D);
- } else if (src_op.mode == MODE_REG_DIRECT) {
- if (inst->op == M68K_MULS) {
- movsx_rr(code, src_op.base, opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movzx_rr(code, src_op.base, opts->gen.scratch1, SZ_W, SZ_D);
- }
- } else {
- if (inst->op == M68K_MULS) {
- movsx_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch1, SZ_W, SZ_D);
- } else {
- movzx_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch1, SZ_W, SZ_D);
- }
- }
- if (dst_op.mode == MODE_REG_DIRECT) {
- dst_reg = dst_op.base;
- if (inst->op == M68K_MULS) {
- movsx_rr(code, dst_reg, dst_reg, SZ_W, SZ_D);
- } else {
- movzx_rr(code, dst_reg, dst_reg, SZ_W, SZ_D);
- }
- } else {
- dst_reg = opts->gen.scratch2;
- if (inst->op == M68K_MULS) {
- movsx_rdispr(code, dst_op.base, dst_op.disp, opts->gen.scratch2, SZ_W, SZ_D);
- } else {
- movzx_rdispr(code, dst_op.base, dst_op.disp, opts->gen.scratch2, SZ_W, SZ_D);
- }
- }
- imul_rr(code, opts->gen.scratch1, dst_reg, SZ_D);
- if (dst_op.mode == MODE_REG_DISPLACE8) {
- mov_rrdisp(code, dst_reg, dst_op.base, dst_op.disp, SZ_D);
- }
- set_flag(opts, 0, FLAG_V);
- set_flag(opts, 0, FLAG_C);
- cmp_ir(code, 0, dst_reg, SZ_D);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- break;
- //case M68K_NBCD:
- case M68K_NEG:
- cycles(&opts->gen, BUS);
- if (dst_op.mode == MODE_REG_DIRECT) {
- neg_r(code, dst_op.base, inst->extra.size);
- } else {
- neg_rdisp(code, dst_op.base, dst_op.disp, inst->extra.size);
- }
- set_flag_cond(opts, CC_C, FLAG_C);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag_cond(opts, CC_O, FLAG_V);
- if (opts->flag_regs[FLAG_C] >= 0) {
- flag_to_flag(opts, FLAG_C, FLAG_X);
- } else {
- set_flag_cond(opts, CC_C, FLAG_X);
- }
- m68k_save_result(inst, opts);
- break;
- case M68K_NEGX: {
- cycles(&opts->gen, BUS);
- if (dst_op.mode == MODE_REG_DIRECT) {
- if (dst_op.base == opts->gen.scratch1) {
- push_r(code, opts->gen.scratch2);
- xor_rr(code, opts->gen.scratch2, opts->gen.scratch2, inst->extra.size);
- flag_to_carry(opts, FLAG_X);
- sbb_rr(code, dst_op.base, opts->gen.scratch2, inst->extra.size);
- mov_rr(code, opts->gen.scratch2, dst_op.base, inst->extra.size);
- pop_r(code, opts->gen.scratch2);
- } else {
- xor_rr(code, opts->gen.scratch1, opts->gen.scratch1, inst->extra.size);
- flag_to_carry(opts, FLAG_X);
- sbb_rr(code, dst_op.base, opts->gen.scratch1, inst->extra.size);
- mov_rr(code, opts->gen.scratch1, dst_op.base, inst->extra.size);
- }
- } else {
- xor_rr(code, opts->gen.scratch1, opts->gen.scratch1, inst->extra.size);
- flag_to_carry(opts, FLAG_X);
- sbb_rdispr(code, dst_op.base, dst_op.disp, opts->gen.scratch1, inst->extra.size);
- mov_rrdisp(code, opts->gen.scratch1, dst_op.base, dst_op.disp, inst->extra.size);
- }
- set_flag_cond(opts, CC_C, FLAG_C);
- code_ptr after_flag_set = code->cur + 1;
- jcc(code, CC_Z, code->cur + 2);
- set_flag(opts, 0, FLAG_Z);
- *after_flag_set = code->cur - (after_flag_set+1);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag_cond(opts, CC_O, FLAG_V);
- if (opts->flag_regs[FLAG_C] >= 0) {
- flag_to_flag(opts, FLAG_C, FLAG_X);
- } else {
- set_flag_cond(opts, CC_C, FLAG_X);
- }
- m68k_save_result(inst, opts);
- break;
- }
- case M68K_NOP:
- cycles(&opts->gen, BUS);
- break;
- case M68K_NOT:
- if (dst_op.mode == MODE_REG_DIRECT) {
- not_r(code, dst_op.base, inst->extra.size);
- cmp_ir(code, 0, dst_op.base, inst->extra.size);
- } else {
- not_rdisp(code, dst_op.base, dst_op.disp, inst->extra.size);
- cmp_irdisp(code, 0, dst_op.base, dst_op.disp, inst->extra.size);
- }
-
- set_flag(opts, 0, FLAG_C);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag(opts, 0, FLAG_V);
- m68k_save_result(inst, opts);
- break;
- case M68K_OR:
- cycles(&opts->gen, BUS);
- if (src_op.mode == MODE_REG_DIRECT) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- or_rr(code, src_op.base, dst_op.base, inst->extra.size);
- } else {
- or_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, inst->extra.size);
- }
- } else if (src_op.mode == MODE_REG_DISPLACE8) {
- or_rdispr(code, src_op.base, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- if (dst_op.mode == MODE_REG_DIRECT) {
- or_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- or_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- set_flag(opts, 0, FLAG_C);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag(opts, 0, FLAG_V);
- m68k_save_result(inst, opts);
- break;
- case M68K_ORI_CCR:
- case M68K_ORI_SR:
- cycles(&opts->gen, 20);
- //TODO: If ANDI to SR, trap if not in supervisor mode
- if (inst->src.params.immed & 0x1) {
- set_flag(opts, 1, FLAG_C);
- }
- if (inst->src.params.immed & 0x2) {
- set_flag(opts, 1, FLAG_V);
- }
- if (inst->src.params.immed & 0x4) {
- set_flag(opts, 1, FLAG_Z);
- }
- if (inst->src.params.immed & 0x8) {
- set_flag(opts, 1, FLAG_N);
- }
- if (inst->src.params.immed & 0x10) {
- set_flag(opts, 1, FLAG_X);
- }
- if (inst->op == M68K_ORI_SR) {
- or_irdisp(code, inst->src.params.immed >> 8, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- if (inst->src.params.immed & 0x700) {
- call(code, opts->do_sync);
- }
- }
- break;
- case M68K_RESET:
- call(code, opts->gen.save_context);
-#ifdef X86_64
- mov_rr(code, opts->gen.context_reg, RDI, SZ_PTR);
-#else
- push_r(code, opts->gen.context_reg);
-#endif
- call(code, (code_ptr)print_regs_exit);
- break;
- case M68K_ROL:
- case M68K_ROR:
- set_flag(opts, 0, FLAG_V);
- if (inst->src.addr_mode == MODE_UNUSED) {
- cycles(&opts->gen, BUS);
- //Memory rotate
- if (inst->op == M68K_ROL) {
- rol_ir(code, 1, dst_op.base, inst->extra.size);
- } else {
- ror_ir(code, 1, dst_op.base, inst->extra.size);
- }
- set_flag_cond(opts, CC_C, FLAG_C);
- cmp_ir(code, 0, dst_op.base, inst->extra.size);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- m68k_save_result(inst, opts);
- } else {
- if (src_op.mode == MODE_IMMED) {
- cycles(&opts->gen, (inst->extra.size == OPSIZE_LONG ? 8 : 6) + src_op.disp*2);
- if (dst_op.mode == MODE_REG_DIRECT) {
- if (inst->op == M68K_ROL) {
- rol_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- ror_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- }
- } else {
- if (inst->op == M68K_ROL) {
- rol_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- } else {
- ror_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- set_flag_cond(opts, CC_C, FLAG_C);
- } else {
- if (src_op.mode == MODE_REG_DIRECT) {
- if (src_op.base != opts->gen.scratch1) {
- mov_rr(code, src_op.base, opts->gen.scratch1, SZ_B);
- }
- } else {
- mov_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch1, SZ_B);
- }
- and_ir(code, 63, opts->gen.scratch1, SZ_D);
- zero_off = code->cur + 1;
- jcc(code, CC_Z, code->cur + 2);
- add_rr(code, opts->gen.scratch1, CYCLES, SZ_D);
- add_rr(code, opts->gen.scratch1, CYCLES, SZ_D);
- cmp_ir(code, 32, opts->gen.scratch1, SZ_B);
- norm_off = code->cur + 1;
- jcc(code, CC_L, code->cur + 2);
- sub_ir(code, 32, opts->gen.scratch1, SZ_B);
- if (dst_op.mode == MODE_REG_DIRECT) {
- if (inst->op == M68K_ROL) {
- rol_ir(code, 31, dst_op.base, inst->extra.size);
- rol_ir(code, 1, dst_op.base, inst->extra.size);
- } else {
- ror_ir(code, 31, dst_op.base, inst->extra.size);
- ror_ir(code, 1, dst_op.base, inst->extra.size);
- }
- } else {
- if (inst->op == M68K_ROL) {
- rol_irdisp(code, 31, dst_op.base, dst_op.disp, inst->extra.size);
- rol_irdisp(code, 1, dst_op.base, dst_op.disp, inst->extra.size);
- } else {
- ror_irdisp(code, 31, dst_op.base, dst_op.disp, inst->extra.size);
- ror_irdisp(code, 1, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- *norm_off = code->cur - (norm_off+1);
- if (dst_op.mode == MODE_REG_DIRECT) {
- if (inst->op == M68K_ROL) {
- rol_clr(code, dst_op.base, inst->extra.size);
- } else {
- ror_clr(code, dst_op.base, inst->extra.size);
- }
- } else {
- if (inst->op == M68K_ROL) {
- rol_clrdisp(code, dst_op.base, dst_op.disp, inst->extra.size);
- } else {
- ror_clrdisp(code, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- set_flag_cond(opts, CC_C, FLAG_C);
- end_off = code->cur + 1;
- jmp(code, code->cur + 2);
- *zero_off = code->cur - (zero_off+1);
- set_flag(opts, 0, FLAG_C);
- *end_off = code->cur - (end_off+1);
- }
- if (dst_op.mode == MODE_REG_DIRECT) {
- cmp_ir(code, 0, dst_op.base, inst->extra.size);
- } else {
- cmp_irdisp(code, 0, dst_op.base, dst_op.disp, inst->extra.size);
- }
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- }
- break;
- case M68K_ROXL:
- case M68K_ROXR:
- set_flag(opts, 0, FLAG_V);
- if (inst->src.addr_mode == MODE_UNUSED) {
- cycles(&opts->gen, BUS);
- //Memory rotate
- flag_to_carry(opts, FLAG_X);
- if (inst->op == M68K_ROXL) {
- rcl_ir(code, 1, dst_op.base, inst->extra.size);
- } else {
- rcr_ir(code, 1, dst_op.base, inst->extra.size);
- }
- set_flag_cond(opts, CC_C, FLAG_C);
- if (opts->flag_regs[FLAG_C] < 0) {
- set_flag_cond(opts, CC_C, FLAG_X);
- }
- cmp_ir(code, 0, dst_op.base, inst->extra.size);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- if (opts->flag_regs[FLAG_C] >= 0) {
- flag_to_flag(opts, FLAG_C, FLAG_X);
- }
- m68k_save_result(inst, opts);
- } else {
- if (src_op.mode == MODE_IMMED) {
- cycles(&opts->gen, (inst->extra.size == OPSIZE_LONG ? 8 : 6) + src_op.disp*2);
- flag_to_carry(opts, FLAG_X);
- if (dst_op.mode == MODE_REG_DIRECT) {
- if (inst->op == M68K_ROXL) {
- rcl_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- rcr_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- }
- } else {
- if (inst->op == M68K_ROXL) {
- rcl_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- } else {
- rcr_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- set_flag_cond(opts, CC_C, FLAG_C);
- if (opts->flag_regs[FLAG_C] >= 0) {
- flag_to_flag(opts, FLAG_C, FLAG_X);
- } else {
- set_flag_cond(opts, CC_C, FLAG_X);
- }
- } else {
- if (src_op.mode == MODE_REG_DIRECT) {
- if (src_op.base != opts->gen.scratch1) {
- mov_rr(code, src_op.base, opts->gen.scratch1, SZ_B);
- }
- } else {
- mov_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch1, SZ_B);
- }
- and_ir(code, 63, opts->gen.scratch1, SZ_D);
- zero_off = code->cur + 1;
- jcc(code, CC_Z, code->cur + 2);
- add_rr(code, opts->gen.scratch1, CYCLES, SZ_D);
- add_rr(code, opts->gen.scratch1, CYCLES, SZ_D);
- cmp_ir(code, 32, opts->gen.scratch1, SZ_B);
- norm_off = code->cur + 1;
- jcc(code, CC_L, code->cur + 2);
- flag_to_carry(opts, FLAG_X);
- if (dst_op.mode == MODE_REG_DIRECT) {
- if (inst->op == M68K_ROXL) {
- rcl_ir(code, 31, dst_op.base, inst->extra.size);
- rcl_ir(code, 1, dst_op.base, inst->extra.size);
- } else {
- rcr_ir(code, 31, dst_op.base, inst->extra.size);
- rcr_ir(code, 1, dst_op.base, inst->extra.size);
- }
- } else {
- if (inst->op == M68K_ROXL) {
- rcl_irdisp(code, 31, dst_op.base, dst_op.disp, inst->extra.size);
- rcl_irdisp(code, 1, dst_op.base, dst_op.disp, inst->extra.size);
- } else {
- rcr_irdisp(code, 31, dst_op.base, dst_op.disp, inst->extra.size);
- rcr_irdisp(code, 1, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- set_flag_cond(opts, CC_C, FLAG_X);
- sub_ir(code, 32, opts->gen.scratch1, SZ_B);
- *norm_off = code->cur - (norm_off+1);
- flag_to_carry(opts, FLAG_X);
- if (dst_op.mode == MODE_REG_DIRECT) {
- if (inst->op == M68K_ROXL) {
- rcl_clr(code, dst_op.base, inst->extra.size);
- } else {
- rcr_clr(code, dst_op.base, inst->extra.size);
- }
- } else {
- if (inst->op == M68K_ROXL) {
- rcl_clrdisp(code, dst_op.base, dst_op.disp, inst->extra.size);
- } else {
- rcr_clrdisp(code, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- set_flag_cond(opts, CC_C, FLAG_C);
- if (opts->flag_regs[FLAG_C] >= 0) {
- flag_to_flag(opts, FLAG_C, FLAG_X);
- } else {
- set_flag_cond(opts, CC_C, FLAG_X);
- }
- end_off = code->cur + 1;
- jmp(code, code->cur + 2);
- *zero_off = code->cur - (zero_off+1);
- //Carry flag is set to X flag when count is 0, this is different from ROR/ROL
- flag_to_flag(opts, FLAG_X, FLAG_C);
- *end_off = code->cur - (end_off+1);
- }
- if (dst_op.mode == MODE_REG_DIRECT) {
- cmp_ir(code, 0, dst_op.base, inst->extra.size);
- } else {
- cmp_irdisp(code, 0, dst_op.base, dst_op.disp, inst->extra.size);
- }
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- }
- break;
- case M68K_RTE:
- //TODO: Trap if not in system mode
- //Read saved SR
- mov_rr(code, opts->aregs[7], opts->gen.scratch1, SZ_D);
- call(code, opts->read_16);
- add_ir(code, 2, opts->aregs[7], SZ_D);
- call(code, opts->set_sr);
- //Read saved PC
- mov_rr(code, opts->aregs[7], opts->gen.scratch1, SZ_D);
- call(code, opts->read_32);
- add_ir(code, 4, opts->aregs[7], SZ_D);
- //Check if we've switched to user mode and swap stack pointers if needed
- bt_irdisp(code, 5, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- end_off = code->cur + 1;
- jcc(code, CC_C, code->cur + 2);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, opts->aregs[7], SZ_D);
- mov_rrdisp(code, opts->gen.scratch2, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, SZ_D);
- *end_off = code->cur - (end_off+1);
- //Get native address, sync components, recalculate integer points and jump to returned address
- call(code, opts->native_addr_and_sync);
- jmp_r(code, opts->gen.scratch1);
- break;
- case M68K_RTR:
- //Read saved CCR
- mov_rr(code, opts->aregs[7], opts->gen.scratch1, SZ_D);
- call(code, opts->read_16);
- add_ir(code, 2, opts->aregs[7], SZ_D);
- call(code, opts->set_ccr);
- //Read saved PC
- mov_rr(code, opts->aregs[7], opts->gen.scratch1, SZ_D);
- call(code, opts->read_32);
- add_ir(code, 4, opts->aregs[7], SZ_D);
- //Get native address and jump to it
- call(code, opts->native_addr);
- jmp_r(code, opts->gen.scratch1);
- break;
- case M68K_SBCD: {
- if (src_op.base != opts->gen.scratch2) {
- if (src_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, src_op.base, opts->gen.scratch2, SZ_B);
- } else {
- mov_rdispr(code, src_op.base, src_op.disp, opts->gen.scratch2, SZ_B);
- }
- }
- if (dst_op.base != opts->gen.scratch1) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, dst_op.base, opts->gen.scratch1, SZ_B);
- } else {
- mov_rdispr(code, dst_op.base, dst_op.disp, opts->gen.scratch1, SZ_B);
- }
- }
- flag_to_carry(opts, FLAG_X);
- jcc(code, CC_NC, code->cur + 5);
- sub_ir(code, 1, opts->gen.scratch1, SZ_B);
- call(code, (code_ptr)bcd_sub);
- reg_to_flag(opts, CH, FLAG_C);
- reg_to_flag(opts, CH, FLAG_X);
- cmp_ir(code, 0, opts->gen.scratch1, SZ_B);
- code_ptr after_flag_set = code->cur+1;
- jcc(code, CC_Z, code->cur + 2);
- set_flag(opts, 0, FLAG_Z);
- *after_flag_set = code->cur - (after_flag_set+1);
- if (dst_op.base != opts->gen.scratch1) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, opts->gen.scratch1, dst_op.base, SZ_B);
- } else {
- mov_rrdisp(code, opts->gen.scratch1, dst_op.base, dst_op.disp, SZ_B);
- }
- }
- m68k_save_result(inst, opts);
- break;
- }
- case M68K_STOP: {
- //TODO: Trap if not in system mode
- //manual says 4 cycles, but it has to be at least 8 since it's a 2-word instruction
- //possibly even 12 since that's how long MOVE to SR takes
- cycles(&opts->gen, BUS*2);
- set_flag(opts, src_op.disp & 0x1, FLAG_C);
- set_flag(opts, (src_op.disp >> 1) & 0x1, FLAG_V);
- set_flag(opts, (src_op.disp >> 2) & 0x1, FLAG_Z);
- set_flag(opts, (src_op.disp >> 3) & 0x1, FLAG_N);
- set_flag(opts, (src_op.disp >> 4) & 0x1, FLAG_X);
- mov_irdisp(code, (src_op.disp >> 8), opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- if (!((inst->src.params.immed >> 8) & (1 << BIT_SUPERVISOR))) {
- //leave supervisor mode
- mov_rr(code, opts->aregs[7], opts->gen.scratch1, SZ_D);
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, opts->aregs[7], SZ_D);
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, SZ_D);
- }
- code_ptr loop_top = code->cur;
- call(code, opts->do_sync);
- cmp_rr(code, opts->gen.limit, opts->gen.cycles, SZ_D);
- code_ptr normal_cycle_up = code->cur + 1;
- jcc(code, CC_A, code->cur + 2);
- cycles(&opts->gen, BUS);
- code_ptr after_cycle_up = code->cur + 1;
- jmp(code, code->cur + 2);
- *normal_cycle_up = code->cur - (normal_cycle_up + 1);
- mov_rr(code, opts->gen.limit, opts->gen.cycles, SZ_D);
- *after_cycle_up = code->cur - (after_cycle_up+1);
- cmp_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, int_cycle), opts->gen.cycles, SZ_D);
- jcc(code, CC_C, loop_top);
- break;
- }
- case M68K_SUB:
- size = inst->dst.addr_mode == MODE_AREG ? OPSIZE_LONG : inst->extra.size;
- cycles(&opts->gen, BUS);
- if (src_op.mode == MODE_REG_DIRECT) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- sub_rr(code, src_op.base, dst_op.base, size);
- } else {
- sub_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, size);
- }
- } else if (src_op.mode == MODE_REG_DISPLACE8) {
- sub_rdispr(code, src_op.base, src_op.disp, dst_op.base, size);
- } else {
- if (dst_op.mode == MODE_REG_DIRECT) {
- sub_ir(code, src_op.disp, dst_op.base, size);
- } else {
- sub_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, size);
- }
- }
- if (inst->dst.addr_mode != MODE_AREG) {
- set_flag_cond(opts, CC_C, FLAG_C);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag_cond(opts, CC_O, FLAG_V);
- if (opts->flag_regs[FLAG_C] >= 0) {
- flag_to_flag(opts, FLAG_C, FLAG_X);
- } else {
- set_flag_cond(opts, CC_C, FLAG_X);
- }
- }
- m68k_save_result(inst, opts);
- break;
- case M68K_SUBX: {
- cycles(&opts->gen, BUS);
- flag_to_carry(opts, FLAG_X);
- if (src_op.mode == MODE_REG_DIRECT) {
- if (dst_op.mode == MODE_REG_DIRECT) {
- sbb_rr(code, src_op.base, dst_op.base, inst->extra.size);
- } else {
- sbb_rrdisp(code, src_op.base, dst_op.base, dst_op.disp, inst->extra.size);
- }
- } else if (src_op.mode == MODE_REG_DISPLACE8) {
- sbb_rdispr(code, src_op.base, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- if (dst_op.mode == MODE_REG_DIRECT) {
- sbb_ir(code, src_op.disp, dst_op.base, inst->extra.size);
- } else {
- sbb_irdisp(code, src_op.disp, dst_op.base, dst_op.disp, inst->extra.size);
- }
- }
- set_flag_cond(opts, CC_C, FLAG_C);
- if (opts->flag_regs[FLAG_C] < 0) {
- set_flag_cond(opts, CC_C, FLAG_X);
- }
- code_ptr after_flag_set = code->cur + 1;
- jcc(code, CC_Z, code->cur + 2);
- set_flag(opts, 0, FLAG_Z);
- *after_flag_set = code->cur - (after_flag_set+1);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag_cond(opts, CC_O, FLAG_V);
- if (opts->flag_regs[FLAG_C] >= 0) {
- flag_to_flag(opts, FLAG_C, FLAG_X);
- }
- m68k_save_result(inst, opts);
- break;
- }
- case M68K_SWAP:
- cycles(&opts->gen, BUS);
- if (src_op.mode == MODE_REG_DIRECT) {
- rol_ir(code, 16, src_op.base, SZ_D);
- cmp_ir(code, 0, src_op.base, SZ_D);
- } else{
- rol_irdisp(code, 16, src_op.base, src_op.disp, SZ_D);
- cmp_irdisp(code, 0, src_op.base, src_op.disp, SZ_D);
- }
-
- set_flag(opts, 0, FLAG_C);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag(opts, 0, FLAG_V);
- break;
- //case M68K_TAS:
- case M68K_TRAP:
- mov_ir(code, src_op.disp + VECTOR_TRAP_0, opts->gen.scratch2, SZ_D);
- mov_ir(code, inst->address+2, opts->gen.scratch1, SZ_D);
- jmp(code, opts->trap);
- break;
- //case M68K_TRAPV:
- case M68K_TST:
- cycles(&opts->gen, BUS);
- if (src_op.mode == MODE_REG_DIRECT) {
- cmp_ir(code, 0, src_op.base, inst->extra.size);
- } else { //M68000 doesn't support immedate operand for tst, so this must be MODE_REG_DISPLACE8
- cmp_irdisp(code, 0, src_op.base, src_op.disp, inst->extra.size);
- }
- set_flag(opts, 0, FLAG_C);
- set_flag_cond(opts, CC_Z, FLAG_Z);
- set_flag_cond(opts, CC_S, FLAG_N);
- set_flag(opts, 0, FLAG_V);
- break;
- case M68K_UNLK:
- cycles(&opts->gen, BUS);
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, dst_op.base, opts->aregs[7], SZ_D);
- } else {
- mov_rdispr(code, dst_op.base, dst_op.disp, opts->aregs[7], SZ_D);
- }
- mov_rr(code, opts->aregs[7], opts->gen.scratch1, SZ_D);
- call(code, opts->read_32);
- if (dst_op.mode == MODE_REG_DIRECT) {
- mov_rr(code, opts->gen.scratch1, dst_op.base, SZ_D);
- } else {
- mov_rrdisp(code, opts->gen.scratch1, dst_op.base, dst_op.disp, SZ_D);
- }
- add_ir(code, 4, opts->aregs[7], SZ_D);
- break;
- default:
- m68k_disasm(inst, disasm_buf);
- printf("%X: %s\ninstruction %d not yet implemented\n", inst->address, disasm_buf, inst->op);
- exit(1);
- }
-}
-
-uint8_t m68k_is_terminal(m68kinst * inst)
-{
- return inst->op == M68K_RTS || inst->op == M68K_RTE || inst->op == M68K_RTR || inst->op == M68K_JMP
- || inst->op == M68K_TRAP || inst->op == M68K_ILLEGAL || inst->op == M68K_INVALID || inst->op == M68K_RESET
- || (inst->op == M68K_BCC && inst->extra.cond == COND_TRUE);
-}
-
-void m68k_handle_deferred(m68k_context * context)
-{
- m68k_options * opts = context->options;
- process_deferred(&opts->gen.deferred, context, (native_addr_func)get_native_from_context);
- if (opts->gen.deferred) {
- translate_m68k_stream(opts->gen.deferred->address, context);
- }
-}
-
-void translate_m68k_stream(uint32_t address, m68k_context * context)
-{
- m68kinst instbuf;
- m68k_options * opts = context->options;
- code_info *code = &opts->gen.code;
- address &= 0xFFFFFF;
- if(get_native_address(opts->gen.native_code_map, address)) {
- return;
- }
- char disbuf[1024];
- uint16_t *encoded, *next;
- if ((address & 0xFFFFFF) < 0x400000) {
- encoded = context->mem_pointers[0] + (address & 0xFFFFFF)/2;
- } else if ((address & 0xFFFFFF) > 0xE00000) {
- encoded = context->mem_pointers[1] + (address & 0xFFFF)/2;
- } else {
- printf("attempt to translate non-memory address: %X\n", address);
- exit(1);
- }
- do {
- if (opts->address_log) {
- fprintf(opts->address_log, "%X\n", address);
- }
- do {
- if (address >= 0x400000 && address < 0xE00000) {
- xor_rr(code, RDI, RDI, SZ_D);
-#ifdef X86_32
- push_r(code, RDI);
-#endif
- call(code, (code_ptr)exit);
- break;
- }
- code_ptr existing = get_native_address(opts->gen.native_code_map, address);
- if (existing) {
- jmp(code, existing);
- break;
- }
- next = m68k_decode(encoded, &instbuf, address);
- if (instbuf.op == M68K_INVALID) {
- instbuf.src.params.immed = *encoded;
- }
- uint16_t m68k_size = (next-encoded)*2;
- address += m68k_size;
- encoded = next;
- //m68k_disasm(&instbuf, disbuf);
- //printf("%X: %s\n", instbuf.address, disbuf);
-
- //make sure the beginning of the code for an instruction is contiguous
- check_alloc_code(code, MAX_INST_LEN*4);
- code_ptr start = code->cur;
- translate_m68k(opts, &instbuf);
- code_ptr after = code->cur;
- map_native_address(context, instbuf.address, start, m68k_size, after-start);
- after;
- } while(!m68k_is_terminal(&instbuf));
- process_deferred(&opts->gen.deferred, context, (native_addr_func)get_native_from_context);
- if (opts->gen.deferred) {
- address = opts->gen.deferred->address;
- if ((address & 0xFFFFFF) < 0x400000) {
- encoded = context->mem_pointers[0] + (address & 0xFFFFFF)/2;
- } else if ((address & 0xFFFFFF) > 0xE00000) {
- encoded = context->mem_pointers[1] + (address & 0xFFFF)/2;
- } else {
- printf("attempt to translate non-memory address: %X\n", address);
- exit(1);
- }
- } else {
- encoded = NULL;
- }
- } while(encoded != NULL);
-}
-
-code_ptr get_native_address_trans(m68k_context * context, uint32_t address)
-{
- address &= 0xFFFFFF;
- code_ptr ret = get_native_address(context->native_code_map, address);
- if (!ret) {
- translate_m68k_stream(address, context);
- ret = get_native_address(context->native_code_map, address);
- }
- return ret;
-}
-
-void * m68k_retranslate_inst(uint32_t address, m68k_context * context)
-{
- m68k_options * opts = context->options;
- code_info *code = &opts->gen.code;
- uint8_t orig_size = get_native_inst_size(opts, address);
- code_ptr orig_start = get_native_address(context->native_code_map, address);
- uint32_t orig = address;
- code_info orig_code;
- orig_code.cur = orig_start;
- orig_code.last = orig_start + orig_size + 5;
- address &= 0xFFFF;
- uint16_t *after, *inst = context->mem_pointers[1] + address/2;
- m68kinst instbuf;
- after = m68k_decode(inst, &instbuf, orig);
- if (orig_size != MAX_NATIVE_SIZE) {
- deferred_addr * orig_deferred = opts->gen.deferred;
-
- //make sure the beginning of the code for an instruction is contiguous
- check_alloc_code(code, MAX_INST_LEN*4);
- code_ptr native_start = code->cur;
- translate_m68k(opts, &instbuf);
- code_ptr native_end = code->cur;
- uint8_t is_terminal = m68k_is_terminal(&instbuf);
- if ((native_end - native_start) <= orig_size) {
- code_ptr native_next;
- if (!is_terminal) {
- native_next = get_native_address(context->native_code_map, orig + (after-inst)*2);
- }
- if (is_terminal || (native_next && ((native_next == orig_start + orig_size) || (orig_size - (native_end - native_start)) > 5))) {
- remove_deferred_until(&opts->gen.deferred, orig_deferred);
- code_info tmp;
- tmp.cur = code->cur;
- tmp.last = code->last;
- code->cur = orig_code.cur;
- code->last = orig_code.last;
- translate_m68k(opts, &instbuf);
- native_end = orig_code.cur = code->cur;
- code->cur = tmp.cur;
- code->last = tmp.last;
- if (!is_terminal) {
- if (native_next == orig_start + orig_size && (native_next-native_end) < 2) {
- while (orig_code.cur < orig_start + orig_size) {
- *(orig_code.cur++) = 0x90; //NOP
- }
- } else {
- jmp(&orig_code, native_next);
- }
- }
- m68k_handle_deferred(context);
- return orig_start;
- }
- }
-
- map_native_address(context, instbuf.address, native_start, (after-inst)*2, MAX_NATIVE_SIZE);
-
- jmp(&orig_code, native_start);
- if (!m68k_is_terminal(&instbuf)) {
- code_ptr native_end = code->cur;
- code->cur = native_start + MAX_NATIVE_SIZE;
- code_ptr rest = get_native_address_trans(context, orig + (after-inst)*2);
- code_ptr tmp = code->cur;
- code->cur = native_end;
- jmp(code, rest);
- code->cur = tmp;
- } else {
- code->cur = native_start + MAX_NATIVE_SIZE;
- }
- m68k_handle_deferred(context);
- return native_start;
- } else {
- code_info tmp;
- tmp.cur = code->cur;
- tmp.last = code->last;
- code->cur = orig_code.cur;
- code->last = orig_code.last;
- translate_m68k(opts, &instbuf);
- if (!m68k_is_terminal(&instbuf)) {
- jmp(code, get_native_address_trans(context, orig + (after-inst)*2));
- }
- code->cur = tmp.cur;
- code->last = tmp.last;
- m68k_handle_deferred(context);
- return orig_start;
- }
-}
-
-m68k_context * m68k_handle_code_write(uint32_t address, m68k_context * context)
-{
- uint32_t inst_start = get_instruction_start(context->native_code_map, address | 0xFF0000);
- if (inst_start) {
- m68k_options * options = context->options;
- code_info *code = &options->gen.code;
- code_ptr dst = get_native_address(context->native_code_map, inst_start);
- code_info orig;
- orig.cur = dst;
- orig.last = dst + 128;
- mov_ir(&orig, inst_start, options->gen.scratch2, SZ_D);
-
- if (!options->retrans_stub) {
- options->retrans_stub = code->cur;
- call(code, options->gen.save_context);
- push_r(code, options->gen.context_reg);
-#ifdef X86_32
- push_r(code, options->gen.context_reg);
- push_r(code, options->gen.scratch2);
-#endif
- call(code, (code_ptr)m68k_retranslate_inst);
-#ifdef X86_32
- add_ir(code, 8, RSP, SZ_D);
-#endif
- pop_r(code, options->gen.context_reg);
- mov_rr(code, RAX, options->gen.scratch1, SZ_PTR);
- call(code, options->gen.load_context);
- jmp_r(code, options->gen.scratch1);
- }
- jmp(&orig, options->retrans_stub);
- }
- return context;
-}
-
-void insert_breakpoint(m68k_context * context, uint32_t address, code_ptr bp_handler)
-{
- static code_ptr bp_stub = NULL;
- m68k_options * opts = context->options;
- code_info native;
- native.cur = get_native_address_trans(context, address);
- native.last = native.cur + 128;
- code_ptr start_native = native.cur;
- mov_ir(&native, address, opts->gen.scratch1, SZ_D);
- if (!bp_stub) {
- code_info *code = &opts->gen.code;
- check_alloc_code(code, 5);
- bp_stub = code->cur;
- call(&native, bp_stub);
-
- //Calculate length of prologue
- check_cycles_int(&opts->gen, address);
- int check_int_size = code->cur-bp_stub;
- code->cur = bp_stub;
-
- //Save context and call breakpoint handler
- call(code, opts->gen.save_context);
- push_r(code, opts->gen.scratch1);
-#ifdef X86_64
- mov_rr(code, opts->gen.context_reg, RDI, SZ_PTR);
- mov_rr(code, opts->gen.scratch1, RSI, SZ_D);
-#else
- push_r(code, opts->gen.scratch1);
- push_r(code, opts->gen.context_reg);
-#endif
- call(code, bp_handler);
-#ifdef X86_32
- add_ir(code, 8, RSP, SZ_D);
-#endif
- mov_rr(code, RAX, opts->gen.context_reg, SZ_PTR);
- //Restore context
- call(code, opts->gen.load_context);
- pop_r(code, opts->gen.scratch1);
- //do prologue stuff
- cmp_rr(code, opts->gen.cycles, opts->gen.limit, SZ_D);
- code_ptr jmp_off = code->cur + 1;
- jcc(code, CC_NC, code->cur + 7);
- call(code, opts->gen.handle_cycle_limit_int);
- *jmp_off = code->cur - (jmp_off+1);
- //jump back to body of translated instruction
- pop_r(code, opts->gen.scratch1);
- add_ir(code, check_int_size - (native.cur-start_native), opts->gen.scratch1, SZ_PTR);
- jmp_r(code, opts->gen.scratch1);
- } else {
- call(&native, bp_stub);
- }
-}
-
-void remove_breakpoint(m68k_context * context, uint32_t address)
-{
- code_ptr native = get_native_address(context->native_code_map, address);
- check_cycles_int(context->options, address);
-}
-
-void start_68k_context(m68k_context * context, uint32_t address)
-{
- code_ptr addr = get_native_address_trans(context, address);
- m68k_options * options = context->options;
- options->start_context(addr, context);
-}
-
-void m68k_reset(m68k_context * context)
-{
- //TODO: Make this actually use the normal read functions
- context->aregs[7] = context->mem_pointers[0][0] << 16 | context->mem_pointers[0][1];
- uint32_t address = context->mem_pointers[0][2] << 16 | context->mem_pointers[0][3];
- start_68k_context(context, address);
-}
-
-code_ptr gen_mem_fun(cpu_options * opts, memmap_chunk * memmap, uint32_t num_chunks, ftype fun_type)
-{
- code_info *code = &opts->code;
- code_ptr start = code->cur;
- check_cycles(opts);
- cycles(opts, BUS);
- and_ir(code, 0xFFFFFF, opts->scratch1, SZ_D);
- code_ptr lb_jcc = NULL, ub_jcc = NULL;
- uint8_t is_write = fun_type == WRITE_16 || fun_type == WRITE_8;
- uint8_t adr_reg = is_write ? opts->scratch2 : opts->scratch1;
- uint16_t access_flag = is_write ? MMAP_WRITE : MMAP_READ;
- uint8_t size = (fun_type == READ_16 || fun_type == WRITE_16) ? SZ_W : SZ_B;
- for (uint32_t chunk = 0; chunk < num_chunks; chunk++)
- {
- if (memmap[chunk].start > 0) {
- cmp_ir(code, memmap[chunk].start, adr_reg, SZ_D);
- lb_jcc = code->cur + 1;
- jcc(code, CC_C, code->cur + 2);
- }
- if (memmap[chunk].end < 0x1000000) {
- cmp_ir(code, memmap[chunk].end, adr_reg, SZ_D);
- ub_jcc = code->cur + 1;
- jcc(code, CC_NC, code->cur + 2);
- }
-
- if (memmap[chunk].mask != 0xFFFFFF) {
- and_ir(code, memmap[chunk].mask, adr_reg, SZ_D);
- }
- void * cfun;
- switch (fun_type)
- {
- case READ_16:
- cfun = memmap[chunk].read_16;
- break;
- case READ_8:
- cfun = memmap[chunk].read_8;
- break;
- case WRITE_16:
- cfun = memmap[chunk].write_16;
- break;
- case WRITE_8:
- cfun = memmap[chunk].write_8;
- break;
- default:
- cfun = NULL;
- }
- if(memmap[chunk].buffer && memmap[chunk].flags & access_flag) {
- if (memmap[chunk].flags & MMAP_PTR_IDX) {
- if (memmap[chunk].flags & MMAP_FUNC_NULL) {
- cmp_irdisp(code, 0, opts->context_reg, offsetof(m68k_context, mem_pointers) + sizeof(void*) * memmap[chunk].ptr_index, SZ_PTR);
- code_ptr not_null = code->cur + 1;
- jcc(code, CC_NZ, code->cur + 2);
- call(code, opts->save_context);
-#ifdef X86_64
- if (is_write) {
- if (opts->scratch2 != RDI) {
- mov_rr(code, opts->scratch2, RDI, SZ_D);
- }
- mov_rr(code, opts->scratch1, RDX, size);
- } else {
- push_r(code, opts->context_reg);
- mov_rr(code, opts->scratch1, RDI, SZ_D);
- }
- test_ir(code, 8, RSP, SZ_D);
- code_ptr adjust_rsp = code->cur + 1;
- jcc(code, CC_NZ, code->cur + 2);
- call(code, cfun);
- code_ptr no_adjust = code->cur + 1;
- jmp(code, code->cur + 2);
- *adjust_rsp = code->cur - (adjust_rsp + 1);
- sub_ir(code, 8, RSP, SZ_PTR);
- call(code, cfun);
- add_ir(code, 8, RSP, SZ_PTR);
- *no_adjust = code->cur - (no_adjust + 1);
-#else
- if (is_write) {
- push_r(code, opts->scratch1);
- } else {
- push_r(code, opts->context_reg);//save opts->context_reg for later
- }
- push_r(code, opts->context_reg);
- push_r(code, is_write ? opts->scratch2 : opts->scratch1);
- call(code, cfun);
- add_ir(code, is_write ? 12 : 8, RSP, SZ_D);
-#endif
- if (is_write) {
- mov_rr(code, RAX, opts->context_reg, SZ_PTR);
- } else {
- pop_r(code, opts->context_reg);
- mov_rr(code, RAX, opts->scratch1, size);
- }
- jmp(code, opts->load_context);
-
- *not_null = code->cur - (not_null + 1);
- }
- if (size == SZ_B) {
- xor_ir(code, 1, adr_reg, SZ_D);
- }
- add_rdispr(code, opts->context_reg, offsetof(m68k_context, mem_pointers) + sizeof(void*) * memmap[chunk].ptr_index, adr_reg, SZ_PTR);
- if (is_write) {
- mov_rrind(code, opts->scratch1, opts->scratch2, size);
-
- } else {
- mov_rindr(code, opts->scratch1, opts->scratch1, size);
- }
- } else {
- uint8_t tmp_size = size;
- if (size == SZ_B) {
- if ((memmap[chunk].flags & MMAP_ONLY_ODD) || (memmap[chunk].flags & MMAP_ONLY_EVEN)) {
- bt_ir(code, 0, adr_reg, SZ_D);
- code_ptr good_addr = code->cur + 1;
- jcc(code, (memmap[chunk].flags & MMAP_ONLY_ODD) ? CC_C : CC_NC, code->cur + 2);
- if (!is_write) {
- mov_ir(code, 0xFF, opts->scratch1, SZ_B);
- }
- retn(code);
- *good_addr = code->cur - (good_addr + 1);
- shr_ir(code, 1, adr_reg, SZ_D);
- } else {
- xor_ir(code, 1, adr_reg, SZ_D);
- }
- } else if ((memmap[chunk].flags & MMAP_ONLY_ODD) || (memmap[chunk].flags & MMAP_ONLY_EVEN)) {
- tmp_size = SZ_B;
- shr_ir(code, 1, adr_reg, SZ_D);
- if ((memmap[chunk].flags & MMAP_ONLY_EVEN) && is_write) {
- shr_ir(code, 8, opts->scratch1, SZ_W);
- }
- }
- if ((intptr_t)memmap[chunk].buffer <= 0x7FFFFFFF && (intptr_t)memmap[chunk].buffer >= -2147483648) {
- if (is_write) {
- mov_rrdisp(code, opts->scratch1, opts->scratch2, (intptr_t)memmap[chunk].buffer, tmp_size);
- } else {
- mov_rdispr(code, opts->scratch1, (intptr_t)memmap[chunk].buffer, opts->scratch1, tmp_size);
- }
- } else {
- if (is_write) {
- push_r(code, opts->scratch1);
- mov_ir(code, (intptr_t)memmap[chunk].buffer, opts->scratch1, SZ_PTR);
- add_rr(code, opts->scratch1, opts->scratch2, SZ_PTR);
- pop_r(code, opts->scratch1);
- mov_rrind(code, opts->scratch1, opts->scratch2, tmp_size);
- } else {
- mov_ir(code, (intptr_t)memmap[chunk].buffer, opts->scratch2, SZ_PTR);
- mov_rindexr(code, opts->scratch2, opts->scratch1, 1, opts->scratch1, tmp_size);
- }
- }
- if (size != tmp_size && !is_write) {
- if (memmap[chunk].flags & MMAP_ONLY_EVEN) {
- shl_ir(code, 8, opts->scratch1, SZ_W);
- mov_ir(code, 0xFF, opts->scratch1, SZ_B);
- } else {
- or_ir(code, 0xFF00, opts->scratch1, SZ_W);
- }
- }
- }
- if (is_write && (memmap[chunk].flags & MMAP_CODE)) {
- mov_rr(code, opts->scratch2, opts->scratch1, SZ_D);
- shr_ir(code, 11, opts->scratch1, SZ_D);
- bt_rrdisp(code, opts->scratch1, opts->context_reg, offsetof(m68k_context, ram_code_flags), SZ_D);
- code_ptr not_code = code->cur + 1;
- jcc(code, CC_NC, code->cur + 2);
- call(code, opts->save_context);
-#ifdef X86_32
- push_r(code, opts->context_reg);
- push_r(code, opts->scratch2);
-#endif
- call(code, (code_ptr)m68k_handle_code_write);
-#ifdef X86_32
- add_ir(code, 8, RSP, SZ_D);
-#endif
- mov_rr(code, RAX, opts->context_reg, SZ_PTR);
- call(code, opts->load_context);
- *not_code = code->cur - (not_code+1);
- }
- retn(code);
- } else if (cfun) {
- call(code, opts->save_context);
-#ifdef X86_64
- if (is_write) {
- if (opts->scratch2 != RDI) {
- mov_rr(code, opts->scratch2, RDI, SZ_D);
- }
- mov_rr(code, opts->scratch1, RDX, size);
- } else {
- push_r(code, opts->context_reg);
- mov_rr(code, opts->scratch1, RDI, SZ_D);
- }
- test_ir(code, 8, RSP, SZ_D);
- code_ptr adjust_rsp = code->cur + 1;
- jcc(code, CC_NZ, code->cur + 2);
- call(code, cfun);
- code_ptr no_adjust = code->cur + 1;
- jmp(code, code->cur + 2);
- *adjust_rsp = code->cur - (adjust_rsp + 1);
- sub_ir(code, 8, RSP, SZ_PTR);
- call(code, cfun);
- add_ir(code, 8, RSP, SZ_PTR);
- *no_adjust = code->cur - (no_adjust+1);
-#else
- if (is_write) {
- push_r(code, opts->scratch1);
- } else {
- push_r(code, opts->context_reg);//save opts->context_reg for later
- }
- push_r(code, opts->context_reg);
- push_r(code, is_write ? opts->scratch2 : opts->scratch1);
- call(code, cfun);
- add_ir(code, is_write ? 12 : 8, RSP, SZ_D);
-#endif
- if (is_write) {
- mov_rr(code, RAX, opts->context_reg, SZ_PTR);
- } else {
- pop_r(code, opts->context_reg);
- mov_rr(code, RAX, opts->scratch1, size);
- }
- jmp(code, opts->load_context);
- } else {
- //Not sure the best course of action here
- if (!is_write) {
- mov_ir(code, size == SZ_B ? 0xFF : 0xFFFF, opts->scratch1, size);
- }
- retn(code);
- }
- if (lb_jcc) {
- *lb_jcc = code->cur - (lb_jcc+1);
- lb_jcc = NULL;
- }
- if (ub_jcc) {
- *ub_jcc = code->cur - (ub_jcc+1);
- ub_jcc = NULL;
- }
- }
- if (!is_write) {
- mov_ir(code, size == SZ_B ? 0xFF : 0xFFFF, opts->scratch1, size);
- }
- retn(code);
- return start;
-}
-
-void init_x86_68k_opts(m68k_options * opts, memmap_chunk * memmap, uint32_t num_chunks)
-{
- memset(opts, 0, sizeof(*opts));
- for (int i = 0; i < 8; i++)
- {
- opts->dregs[i] = opts->aregs[i] = -1;
- }
-#ifdef X86_64
- opts->dregs[0] = R10;
- opts->dregs[1] = R11;
- opts->dregs[2] = R12;
- opts->dregs[3] = R8;
- opts->aregs[0] = R13;
- opts->aregs[1] = R14;
- opts->aregs[2] = R9;
- opts->aregs[7] = R15;
-
- opts->flag_regs[0] = -1;
- opts->flag_regs[1] = RBX;
- opts->flag_regs[2] = RDX;
- opts->flag_regs[3] = BH;
- opts->flag_regs[4] = DH;
-
- opts->gen.scratch2 = RDI;
-#else
- opts->dregs[0] = RDX;
- opts->aregs[7] = RDI;
-
- for (int i = 0; i < 5; i++)
- {
- opts->flag_regs[i] = -1;
- }
- opts->gen.scratch2 = RBX;
-#endif
- opts->gen.context_reg = RSI;
- opts->gen.cycles = RAX;
- opts->gen.limit = RBP;
- opts->gen.scratch1 = RCX;
-
-
- opts->gen.native_code_map = malloc(sizeof(native_map_slot) * NATIVE_MAP_CHUNKS);
- memset(opts->gen.native_code_map, 0, sizeof(native_map_slot) * NATIVE_MAP_CHUNKS);
- opts->gen.deferred = NULL;
- opts->gen.ram_inst_sizes = malloc(sizeof(uint8_t *) * 64);
- memset(opts->gen.ram_inst_sizes, 0, sizeof(uint8_t *) * 64);
-
- code_info *code = &opts->gen.code;
- init_code_info(code);
-
- opts->gen.save_context = code->cur;
- for (int i = 0; i < 5; i++)
- if (opts->flag_regs[i] >= 0) {
- mov_rrdisp(code, opts->flag_regs[i], opts->gen.context_reg, offsetof(m68k_context, flags) + i, SZ_B);
- }
- for (int i = 0; i < 8; i++)
- {
- if (opts->dregs[i] >= 0) {
- mov_rrdisp(code, opts->dregs[i], opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t) * i, SZ_D);
- }
- if (opts->aregs[i] >= 0) {
- mov_rrdisp(code, opts->aregs[i], opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * i, SZ_D);
- }
- }
- mov_rrdisp(code, opts->gen.cycles, opts->gen.context_reg, offsetof(m68k_context, current_cycle), SZ_D);
- retn(code);
-
- opts->gen.load_context = code->cur;
- for (int i = 0; i < 5; i++)
- if (opts->flag_regs[i] >= 0) {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, flags) + i, opts->flag_regs[i], SZ_B);
- }
- for (int i = 0; i < 8; i++)
- {
- if (opts->dregs[i] >= 0) {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, dregs) + sizeof(uint32_t) * i, opts->dregs[i], SZ_D);
- }
- if (opts->aregs[i] >= 0) {
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * i, opts->aregs[i], SZ_D);
- }
- }
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, current_cycle), CYCLES, SZ_D);
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, target_cycle), LIMIT, SZ_D);
- retn(code);
-
- opts->start_context = (start_fun)code->cur;
-#ifdef X86_64
- if (opts->gen.scratch2 != RDI) {
- mov_rr(code, RDI, opts->gen.scratch2, SZ_PTR);
- }
- //save callee save registers
- push_r(code, RBP);
- push_r(code, R12);
- push_r(code, R13);
- push_r(code, R14);
- push_r(code, R15);
-#else
- //save callee save registers
- push_r(code, RBP);
- push_r(code, RBX);
- push_r(code, RSI);
- push_r(code, RDI);
-
- mov_rdispr(code, RSP, 20, opts->gen.scratch2, SZ_D);
- mov_rdispr(code, RSP, 24, opts->gen.context_reg, SZ_D);
-#endif
- call(code, opts->gen.load_context);
- call_r(code, opts->gen.scratch2);
- call(code, opts->gen.save_context);
-#ifdef X86_64
- //restore callee save registers
- pop_r(code, R15);
- pop_r(code, R14);
- pop_r(code, R13);
- pop_r(code, R12);
- pop_r(code, RBP);
-#else
- pop_r(code, RDI);
- pop_r(code, RSI);
- pop_r(code, RBX);
- pop_r(code, RBP);
-#endif
- retn(code);
-
- opts->native_addr = code->cur;
- call(code, opts->gen.save_context);
- push_r(code, opts->gen.context_reg);
-#ifdef X86_64
- mov_rr(code, opts->gen.context_reg, RDI, SZ_PTR); //move context to 1st arg reg
- mov_rr(code, opts->gen.scratch1, RSI, SZ_D); //move address to 2nd arg reg
-#else
- push_r(code, opts->gen.scratch1);
- push_r(code, opts->gen.context_reg);
-#endif
- call(code, (code_ptr)get_native_address_trans);
-#ifdef X86_32
- add_ir(code, 8, RSP, SZ_D);
-#endif
- mov_rr(code, RAX, opts->gen.scratch1, SZ_PTR); //move result to scratch reg
- pop_r(code, opts->gen.context_reg);
- call(code, opts->gen.load_context);
- retn(code);
-
- opts->native_addr_and_sync = code->cur;
- call(code, opts->gen.save_context);
- push_r(code, opts->gen.scratch1);
-#ifdef X86_64
- mov_rr(code, opts->gen.context_reg, RDI, SZ_PTR);
- xor_rr(code, RSI, RSI, SZ_D);
- test_ir(code, 8, RSP, SZ_PTR); //check stack alignment
- code_ptr do_adjust_rsp = code->cur + 1;
- jcc(code, CC_NZ, code->cur + 2);
- call(code, (code_ptr)sync_components);
- code_ptr no_adjust_rsp = code->cur + 1;
- jmp(code, code->cur + 2);
- *do_adjust_rsp = code->cur - (do_adjust_rsp+1);
- sub_ir(code, 8, RSP, SZ_PTR);
- call(code, (code_ptr)sync_components);
- add_ir(code, 8, RSP, SZ_PTR);
- *no_adjust_rsp = code->cur - (no_adjust_rsp+1);
- pop_r(code, RSI);
- push_r(code, RAX);
- mov_rr(code, RAX, RDI, SZ_PTR);
- call(code, (code_ptr)get_native_address_trans);
-#else
- //TODO: Add support for pushing a constant in gen_x86
- xor_rr(code, RAX, RAX, SZ_D);
- push_r(code, RAX);
- push_r(code, opts->gen.context_reg);
- call(code, (code_ptr)sync_components);
- add_ir(code, 8, RSP, SZ_D);
- pop_r(code, RSI); //restore saved address from opts->gen.scratch1
- push_r(code, RAX); //save context pointer for later
- push_r(code, RSI); //2nd arg -- address
- push_r(code, RAX); //1st arg -- context pointer
- call(code, (code_ptr)get_native_address_trans);
- add_ir(code, 8, RSP, SZ_D);
-#endif
-
- mov_rr(code, RAX, opts->gen.scratch1, SZ_PTR); //move result to scratch reg
- pop_r(code, opts->gen.context_reg);
- call(code, opts->gen.load_context);
- retn(code);
-
- opts->gen.handle_cycle_limit = code->cur;
- cmp_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, sync_cycle), CYCLES, SZ_D);
- code_ptr skip_sync = code->cur + 1;
- jcc(code, CC_C, code->cur + 2);
- opts->do_sync = code->cur;
- push_r(code, opts->gen.scratch1);
- push_r(code, opts->gen.scratch2);
- call(code, opts->gen.save_context);
-#ifdef X86_64
- mov_rr(code, opts->gen.context_reg, RDI, SZ_PTR);
- xor_rr(code, RSI, RSI, SZ_D);
- test_ir(code, 8, RSP, SZ_D);
- code_ptr adjust_rsp = code->cur + 1;
- jcc(code, CC_NZ, code->cur + 2);
- call(code, (code_ptr)sync_components);
- code_ptr no_adjust = code->cur + 1;
- jmp(code, code->cur + 2);
- *adjust_rsp = code->cur - (adjust_rsp + 1);
- sub_ir(code, 8, RSP, SZ_PTR);
- call(code, (code_ptr)sync_components);
- add_ir(code, 8, RSP, SZ_PTR);
- *no_adjust = code->cur - (no_adjust+1);
-#else
- //TODO: Add support for pushing a constant in gen_x86
- xor_rr(code, RAX, RAX, SZ_D);
- push_r(code, RAX);
- push_r(code, opts->gen.context_reg);
- call(code, (code_ptr)sync_components);
- add_ir(code, 8, RSP, SZ_D);
-#endif
- mov_rr(code, RAX, opts->gen.context_reg, SZ_PTR);
- call(code, opts->gen.load_context);
- pop_r(code, opts->gen.scratch2);
- pop_r(code, opts->gen.scratch1);
- *skip_sync = code->cur - (skip_sync+1);
- retn(code);
-
- opts->read_16 = gen_mem_fun(&opts->gen, memmap, num_chunks, READ_16);
- opts->read_8 = gen_mem_fun(&opts->gen, memmap, num_chunks, READ_8);
- opts->write_16 = gen_mem_fun(&opts->gen, memmap, num_chunks, WRITE_16);
- opts->write_8 = gen_mem_fun(&opts->gen, memmap, num_chunks, WRITE_8);
-
- opts->read_32 = code->cur;
- push_r(code, opts->gen.scratch1);
- call(code, opts->read_16);
- mov_rr(code, opts->gen.scratch1, opts->gen.scratch2, SZ_W);
- pop_r(code, opts->gen.scratch1);
- push_r(code, opts->gen.scratch2);
- add_ir(code, 2, opts->gen.scratch1, SZ_D);
- call(code, opts->read_16);
- pop_r(code, opts->gen.scratch2);
- movzx_rr(code, opts->gen.scratch1, opts->gen.scratch1, SZ_W, SZ_D);
- shl_ir(code, 16, opts->gen.scratch2, SZ_D);
- or_rr(code, opts->gen.scratch2, opts->gen.scratch1, SZ_D);
- retn(code);
-
- opts->write_32_lowfirst = code->cur;
- push_r(code, opts->gen.scratch2);
- push_r(code, opts->gen.scratch1);
- add_ir(code, 2, opts->gen.scratch2, SZ_D);
- call(code, opts->write_16);
- pop_r(code, opts->gen.scratch1);
- pop_r(code, opts->gen.scratch2);
- shr_ir(code, 16, opts->gen.scratch1, SZ_D);
- jmp(code, opts->write_16);
-
- opts->write_32_highfirst = code->cur;
- push_r(code, opts->gen.scratch1);
- push_r(code, opts->gen.scratch2);
- shr_ir(code, 16, opts->gen.scratch1, SZ_D);
- call(code, opts->write_16);
- pop_r(code, opts->gen.scratch2);
- pop_r(code, opts->gen.scratch1);
- add_ir(code, 2, opts->gen.scratch2, SZ_D);
- jmp(code, opts->write_16);
-
- opts->get_sr = code->cur;
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, status), opts->gen.scratch1, SZ_B);
- shl_ir(code, 8, opts->gen.scratch1, SZ_W);
- if (opts->flag_regs[FLAG_X] >= 0) {
- mov_rr(code, opts->flag_regs[FLAG_X], opts->gen.scratch1, SZ_B);
- } else {
- int8_t offset = offsetof(m68k_context, flags);
- if (offset) {
- mov_rdispr(code, opts->gen.context_reg, offset, opts->gen.scratch1, SZ_B);
- } else {
- mov_rindr(code, opts->gen.context_reg, opts->gen.scratch1, SZ_B);
- }
- }
- for (int flag = FLAG_N; flag <= FLAG_C; flag++)
- {
- shl_ir(code, 1, opts->gen.scratch1, SZ_B);
- if (opts->flag_regs[flag] >= 0) {
- or_rr(code, opts->flag_regs[flag], opts->gen.scratch1, SZ_B);
- } else {
- or_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, flags) + flag, opts->gen.scratch1, SZ_B);
- }
- }
- retn(code);
-
- opts->set_sr = code->cur;
- for (int flag = FLAG_C; flag >= FLAG_X; flag--)
- {
- rcr_ir(code, 1, opts->gen.scratch1, SZ_B);
- if (opts->flag_regs[flag] >= 0) {
- setcc_r(code, CC_C, opts->flag_regs[flag]);
- } else {
- int8_t offset = offsetof(m68k_context, flags) + flag;
- if (offset) {
- setcc_rdisp(code, CC_C, opts->gen.context_reg, offset);
- } else {
- setcc_rind(code, CC_C, opts->gen.context_reg);
- }
- }
- }
- shr_ir(code, 8, opts->gen.scratch1, SZ_W);
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- retn(code);
-
- opts->set_ccr = code->cur;
- for (int flag = FLAG_C; flag >= FLAG_X; flag--)
- {
- rcr_ir(code, 1, opts->gen.scratch1, SZ_B);
- if (opts->flag_regs[flag] >= 0) {
- setcc_r(code, CC_C, opts->flag_regs[flag]);
- } else {
- int8_t offset = offsetof(m68k_context, flags) + flag;
- if (offset) {
- setcc_rdisp(code, CC_C, opts->gen.context_reg, offset);
- } else {
- setcc_rind(code, CC_C, opts->gen.context_reg);
- }
- }
- }
- retn(code);
-
- opts->gen.handle_cycle_limit_int = code->cur;
- cmp_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, int_cycle), CYCLES, SZ_D);
- code_ptr do_int = code->cur + 1;
- jcc(code, CC_NC, code->cur + 2);
- cmp_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, sync_cycle), CYCLES, SZ_D);
- skip_sync = code->cur + 1;
- jcc(code, CC_C, code->cur + 2);
- call(code, opts->gen.save_context);
-#ifdef X86_64
- mov_rr(code, opts->gen.context_reg, RDI, SZ_PTR);
- mov_rr(code, opts->gen.scratch1, RSI, SZ_D);
- test_ir(code, 8, RSP, SZ_D);
- adjust_rsp = code->cur + 1;
- jcc(code, CC_NZ, code->cur + 2);
- call(code, (code_ptr)sync_components);
- no_adjust = code->cur + 1;
- jmp(code, code->cur + 2);
- *adjust_rsp = code->cur - (adjust_rsp + 1);
- sub_ir(code, 8, RSP, SZ_PTR);
- call(code, (code_ptr)sync_components);
- add_ir(code, 8, RSP, SZ_PTR);
- *no_adjust = code->cur - (no_adjust+1);
-#else
- push_r(code, opts->gen.scratch1);
- push_r(code, opts->gen.context_reg);
- call(code, (code_ptr)sync_components);
- add_ir(code, 8, RSP, SZ_D);
-#endif
- mov_rr(code, RAX, opts->gen.context_reg, SZ_PTR);
- jmp(code, opts->gen.load_context);
- *skip_sync = code->cur - (skip_sync+1);
- retn(code);
- *do_int = code->cur - (do_int+1);
- //set target cycle to sync cycle
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, sync_cycle), LIMIT, SZ_D);
- //swap USP and SSP if not already in supervisor mode
- bt_irdisp(code, 5, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- code_ptr already_supervisor = code->cur + 1;
- jcc(code, CC_C, code->cur + 2);
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, opts->gen.scratch2, SZ_D);
- mov_rrdisp(code, opts->aregs[7], opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, SZ_D);
- mov_rr(code, opts->gen.scratch2, opts->aregs[7], SZ_D);
- *already_supervisor = code->cur - (already_supervisor+1);
- //save PC
- sub_ir(code, 4, opts->aregs[7], SZ_D);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- call(code, opts->write_32_lowfirst);
- //save status register
- sub_ir(code, 2, opts->aregs[7], SZ_D);
- call(code, opts->get_sr);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- call(code, opts->write_16);
- //update status register
- and_irdisp(code, 0xF8, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, int_num), opts->gen.scratch1, SZ_B);
- or_ir(code, 0x20, opts->gen.scratch1, SZ_B);
- or_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- //calculate interrupt vector address
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, int_num), opts->gen.scratch1, SZ_D);
- mov_rrdisp(code, opts->gen.scratch1, opts->gen.context_reg, offsetof(m68k_context, int_ack), SZ_W);
- shl_ir(code, 2, opts->gen.scratch1, SZ_D);
- add_ir(code, 0x60, opts->gen.scratch1, SZ_D);
- call(code, opts->read_32);
- call(code, opts->native_addr_and_sync);
- cycles(&opts->gen, 24);
- //discard function return address
- pop_r(code, opts->gen.scratch2);
- jmp_r(code, opts->gen.scratch1);
-
- opts->trap = code->cur;
- push_r(code, opts->gen.scratch2);
- //swap USP and SSP if not already in supervisor mode
- bt_irdisp(code, 5, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- already_supervisor = code->cur + 1;
- jcc(code, CC_C, code->cur + 2);
- mov_rdispr(code, opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, opts->gen.scratch2, SZ_D);
- mov_rrdisp(code, opts->aregs[7], opts->gen.context_reg, offsetof(m68k_context, aregs) + sizeof(uint32_t) * 8, SZ_D);
- mov_rr(code, opts->gen.scratch2, opts->aregs[7], SZ_D);
- *already_supervisor = code->cur - (already_supervisor+1);
- //save PC
- sub_ir(code, 4, opts->aregs[7], SZ_D);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- call(code, opts->write_32_lowfirst);
- //save status register
- sub_ir(code, 2, opts->aregs[7], SZ_D);
- call(code, opts->get_sr);
- mov_rr(code, opts->aregs[7], opts->gen.scratch2, SZ_D);
- call(code, opts->write_16);
- //set supervisor bit
- or_irdisp(code, 0x20, opts->gen.context_reg, offsetof(m68k_context, status), SZ_B);
- //calculate vector address
- pop_r(code, opts->gen.scratch1);
- shl_ir(code, 2, opts->gen.scratch1, SZ_D);
- call(code, opts->read_32);
- call(code, opts->native_addr_and_sync);
- cycles(&opts->gen, 18);
- jmp_r(code, opts->gen.scratch1);
-}
-
-void init_68k_context(m68k_context * context, native_map_slot * native_code_map, void * opts)
-{
- memset(context, 0, sizeof(m68k_context));
- context->native_code_map = native_code_map;
- context->options = opts;
- context->int_cycle = 0xFFFFFFFF;
- context->status = 0x27;
-}
-