diff options
Diffstat (limited to 'z80_to_x86.c')
| -rw-r--r-- | z80_to_x86.c | 28 |
1 files changed, 10 insertions, 18 deletions
diff --git a/z80_to_x86.c b/z80_to_x86.c index 15e42b5..13f952a 100644 --- a/z80_to_x86.c +++ b/z80_to_x86.c @@ -879,20 +879,11 @@ void translate_z80inst(z80inst * inst, z80_context * context, uint16_t address, } break; case Z80_HALT: { + code_ptr loop_top = code->cur; + //this isn't terribly efficient, but it's good enough for now cycles(&opts->gen, 4); - mov_ir(code, address, opts->gen.scratch1, SZ_W); - uint8_t * call_inst = code->cur; - mov_rr(code, opts->gen.limit, opts->gen.scratch2, SZ_D); - sub_rr(code, opts->gen.cycles, opts->gen.scratch2, SZ_D); - and_ir(code, 0xFFFFFFFC, opts->gen.scratch2, SZ_D); - add_rr(code, opts->gen.scratch2, opts->gen.cycles, SZ_D); - cmp_rr(code, opts->gen.limit, opts->gen.cycles, SZ_D); - code_ptr skip_last = code->cur+1; - jcc(code, CC_NB, code->cur+2); - cycles(&opts->gen, 4); - *skip_last = code->cur - (skip_last+1); - call(code, opts->gen.handle_cycle_limit_int); - jmp(code, call_inst); + check_cycles_int(&opts->gen, address); + jmp(code, loop_top); break; } case Z80_DI: @@ -908,7 +899,7 @@ void translate_z80inst(z80inst * inst, z80_context * context, uint16_t address, mov_irdisp(code, 1, opts->gen.context_reg, offsetof(z80_context, iff1), SZ_B); mov_irdisp(code, 1, opts->gen.context_reg, offsetof(z80_context, iff2), SZ_B); //interrupt enable has a one-instruction latency, minimum instruction duration is 4 cycles - add_irdisp(code, 4, opts->gen.context_reg, offsetof(z80_context, int_enable_cycle), SZ_D); + add_irdisp(code, 4*opts->gen.clock_divider, opts->gen.context_reg, offsetof(z80_context, int_enable_cycle), SZ_D); call(code, opts->do_sync); break; case Z80_IM: @@ -1932,7 +1923,7 @@ void translate_z80_stream(z80_context * context, uint32_t address) } while (opts->gen.deferred); } -void init_z80_opts(z80_options * options, memmap_chunk const * chunks, uint32_t num_chunks) +void init_z80_opts(z80_options * options, memmap_chunk const * chunks, uint32_t num_chunks, uint32_t clock_divider) { memset(options, 0, sizeof(*options)); @@ -1942,6 +1933,7 @@ void init_z80_opts(z80_options * options, memmap_chunk const * chunks, uint32_t options->gen.address_mask = 0xFFFF; options->gen.max_address = 0x10000; options->gen.bus_cycles = 3; + options->gen.clock_divider = clock_divider; options->gen.mem_ptr_off = offsetof(z80_context, mem_pointers); options->gen.ram_flags_off = offsetof(z80_context, ram_code_flags); options->gen.ram_flags_shift = 7; @@ -1968,18 +1960,18 @@ void init_z80_opts(z80_options * options, memmap_chunk const * chunks, uint32_t options->regs[Z80_AF] = -1; options->regs[Z80_IX] = RDX; options->regs[Z80_IY] = R8; - + options->gen.scratch1 = R13; options->gen.scratch2 = R14; #else memset(options->regs, -1, sizeof(options->regs)); options->regs[Z80_A] = RAX; options->regx[Z80_SP] = RBX; - + options->gen.scratch1 = RCX; options->gen.scratch2 = RDX; #endif - + options->gen.context_reg = RSI; options->gen.cycles = RBP; options->gen.limit = RDI; |