Mercurial > repos > blastem
diff m68k_core_x86.c @ 985:751280fb4494
Fix interrupt latency from STOP instruction status reg changes. Fix modified code patching when non-standard aliases are used. This fixes the demo MDEM's First
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Sun, 24 Apr 2016 21:23:28 -0700 |
| parents | 902c53d9c16f |
| children | f680fe746a7d |
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--- a/m68k_core_x86.c Sun Apr 24 14:30:15 2016 -0700 +++ b/m68k_core_x86.c Sun Apr 24 21:23:28 2016 -0700 @@ -2121,18 +2121,20 @@ swap_ssp_usp(opts); } 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); + 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); + //set int pending flag so interrupt fires immediately after stop is done + mov_irdisp(code, 1, opts->gen.context_reg, offsetof(m68k_context, int_pending), SZ_B); } void translate_m68k_trapv(m68k_options *opts, m68kinst *inst) @@ -2185,9 +2187,10 @@ 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); + m68k_options * options = context->options; + //TODO: Modify gen_mem_fun so that it passes the raw address instead of the masked one, then remove the OR below + uint32_t inst_start = get_instruction_start(options, context->native_code_map, address | 0xE00000); if (inst_start) { - m68k_options * options = context->options; code_info *code = &options->gen.code; code_ptr dst = get_native_address(context->options, inst_start); code_info orig = {dst, dst + 128, 0};