diff options
Diffstat (limited to 'm68k_to_x86.c')
| -rw-r--r-- | m68k_to_x86.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/m68k_to_x86.c b/m68k_to_x86.c index f83165c..fa05030 100644 --- a/m68k_to_x86.c +++ b/m68k_to_x86.c @@ -1249,6 +1249,89 @@ uint8_t * translate_m68k_lea(uint8_t * dst, m68kinst * inst, x86_68k_options * o return dst; } +uint8_t * translate_m68k_pea(uint8_t * dst, m68kinst * inst, x86_68k_options * opts) +{ + uint8_t sec_reg; + switch(inst->src.addr_mode) + { + case MODE_AREG_INDIRECT: + dst = cycles(dst, BUS); + if (opts->aregs[inst->src.params.regs.pri] >= 0) { + dst = mov_rr(dst, opts->aregs[inst->src.params.regs.pri], SCRATCH1, SZ_D); + } else { + dst = mov_rdisp8r(dst, CONTEXT, offsetof(m68k_context, aregs) + 4 * inst->src.params.regs.pri, SCRATCH1, SZ_D); + } + break; + case MODE_AREG_DISPLACE: + dst = cycles(dst, 8); + if (opts->aregs[inst->src.params.regs.pri] >= 0) { + dst = mov_rr(dst, opts->aregs[inst->src.params.regs.pri], SCRATCH1, SZ_D); + } else { + dst = mov_rdisp8r(dst, CONTEXT, reg_offset(&(inst->src)), SCRATCH1, SZ_D); + } + dst = add_ir(dst, inst->src.params.regs.displacement, SCRATCH1, SZ_D); + break; + case MODE_AREG_INDEX_DISP8: + dst = cycles(dst, 6);//TODO: Check to make sure this is correct + if (opts->aregs[inst->src.params.regs.pri] >= 0) { + dst = mov_rr(dst, opts->aregs[inst->src.params.regs.pri], SCRATCH1, SZ_D); + } else { + dst = mov_rdisp8r(dst, CONTEXT, reg_offset(&(inst->src)), 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) { + dst = add_rr(dst, opts->aregs[sec_reg], SCRATCH1, SZ_D); + } else { + dst = add_rdisp8r(dst, CONTEXT, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, SCRATCH1, SZ_D); + } + } else { + if (opts->dregs[sec_reg] >= 0) { + dst = add_rr(dst, opts->dregs[sec_reg], SCRATCH1, SZ_D); + } else { + dst = add_rdisp8r(dst, CONTEXT, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, SCRATCH1, SZ_D); + } + } + } else { + if (inst->src.params.regs.sec & 0x10) { + if (opts->aregs[sec_reg] >= 0) { + dst = movsx_rr(dst, opts->aregs[sec_reg], SCRATCH2, SZ_W, SZ_D); + } else { + dst = movsx_rdisp8r(dst, CONTEXT, offsetof(m68k_context, aregs) + sizeof(uint32_t)*sec_reg, SCRATCH2, SZ_W, SZ_D); + } + } else { + if (opts->dregs[sec_reg] >= 0) { + dst = movsx_rr(dst, opts->dregs[sec_reg], SCRATCH2, SZ_W, SZ_D); + } else { + dst = movsx_rdisp8r(dst, CONTEXT, offsetof(m68k_context, dregs) + sizeof(uint32_t)*sec_reg, SCRATCH2, SZ_W, SZ_D); + } + } + dst = add_rr(dst, SCRATCH2, SCRATCH1, SZ_D); + } + if (inst->src.params.regs.displacement) { + dst = add_ir(dst, inst->src.params.regs.displacement, SCRATCH1, SZ_D); + } + break; + case MODE_PC_DISPLACE: + dst = cycles(dst, 8); + dst = mov_ir(dst, inst->src.params.regs.displacement + inst->address+2, SCRATCH1, SZ_D); + break; + case MODE_ABSOLUTE: + case MODE_ABSOLUTE_SHORT: + dst = cycles(dst, (inst->src.addr_mode == MODE_ABSOLUTE) ? BUS * 3 : BUS * 2); + dst = mov_ir(dst, inst->src.params.immed, SCRATCH1, SZ_D); + break; + default: + printf("address mode %d not implemented (lea src)\n", inst->src.addr_mode); + exit(1); + } + dst = sub_ir(dst, 4, opts->aregs[7], SZ_D); + dst = mov_rr(dst, opts->aregs[7], SCRATCH2, SZ_D); + dst = call(dst, (uint8_t *)m68k_write_long_lowfirst); + return dst; +} + uint8_t * translate_m68k_bsr(uint8_t * dst, m68kinst * inst, x86_68k_options * opts) { int32_t disp = inst->src.params.immed; @@ -1867,6 +1950,8 @@ uint8_t * translate_m68k(uint8_t * dst, m68kinst * inst, x86_68k_options * opts) return translate_m68k_move(dst, inst, opts); } else if(inst->op == M68K_LEA) { return translate_m68k_lea(dst, inst, opts); + } else if(inst->op == M68K_PEA) { + return translate_m68k_pea(dst, inst, opts); } else if(inst->op == M68K_BSR) { return translate_m68k_bsr(dst, inst, opts); } else if(inst->op == M68K_BCC) { |