Mercurial > repos > blastem
comparison backend_x86.c @ 567:8e395210f50f
Refactor gen_x86 to use an interface more like gen_arm and to remove the need for the caller to decide whether an 8-bit or 32-bit displacement is needed in the rdisp functions. Update m68k_to_x86 to use the new version of the gen_x86 functions and do some minor refactoring there in the process
author | Michael Pavone <pavone@retrodev.com> |
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date | Sun, 02 Mar 2014 14:45:36 -0800 |
parents | |
children | 2dde38c1744f |
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566:624dd5106060 | 567:8e395210f50f |
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1 #include "backend.h" | |
2 #include "gen_x86.h" | |
3 | |
4 void cycles(cpu_options *opts, uint32_t num) | |
5 { | |
6 add_ir(&opts->code, num, opts->cycles, SZ_D); | |
7 } | |
8 | |
9 void check_cycles_int(cpu_options *opts, uint32_t address) | |
10 { | |
11 code_info *code = &opts->code; | |
12 cmp_rr(code, opts->cycles, opts->limit, SZ_D); | |
13 code_ptr jmp_off = code->cur+1; | |
14 jcc(code, CC_NC, jmp_off+1); | |
15 mov_ir(code, address, opts->scratch1, SZ_D); | |
16 call(code, opts->handle_cycle_limit_int); | |
17 *jmp_off = code->cur - (jmp_off+1); | |
18 } | |
19 | |
20 void check_cycles(cpu_options * opts) | |
21 { | |
22 code_info *code = &opts->code; | |
23 cmp_rr(code, opts->cycles, opts->limit, SZ_D); | |
24 check_alloc_code(code, MAX_INST_LEN*2); | |
25 code_ptr jmp_off = code->cur+1; | |
26 jcc(code, CC_NC, jmp_off+1); | |
27 call(code, opts->handle_cycle_limit); | |
28 *jmp_off = code->cur - (jmp_off+1); | |
29 } |