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annotate backend_x86.c @ 620:9d6fed6501ba

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Fix handling of code writes for Z80 core. This seems to get things close to being back to where they were before the big refactor that broke the Z80 core. Some problems remain. Notably the sound driver in Sonic 2 is still quite broken.
author Michael Pavone <pavone@retrodev.com>
date Mon, 29 Dec 2014 23:08:39 -0800
parents 39d7d463ed5b
children 6aa29ac33f1a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
1 #include "backend.h"
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
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2 #include "gen_x86.h"
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
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3
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
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4 void cycles(cpu_options *opts, uint32_t num)
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
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5 {
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
Michael Pavone <pavone@retrodev.com>
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6 add_ir(&opts->code, num, opts->cycles, SZ_D);
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
Michael Pavone <pavone@retrodev.com>
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7 }
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
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8
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
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9 void check_cycles_int(cpu_options *opts, uint32_t address)
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
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10 {
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
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11 code_info *code = &opts->code;
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
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12 cmp_rr(code, opts->cycles, opts->limit, SZ_D);
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
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13 code_ptr jmp_off = code->cur+1;
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
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14 jcc(code, CC_NC, jmp_off+1);
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
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15 mov_ir(code, address, opts->scratch1, SZ_D);
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
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16 call(code, opts->handle_cycle_limit_int);
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
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17 *jmp_off = code->cur - (jmp_off+1);
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
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18 }
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
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19
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20 void check_cycles(cpu_options * opts)
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
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21 {
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
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22 code_info *code = &opts->code;
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
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23 cmp_rr(code, opts->cycles, opts->limit, SZ_D);
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
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24 check_alloc_code(code, MAX_INST_LEN*2);
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
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25 code_ptr jmp_off = code->cur+1;
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
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26 jcc(code, CC_NC, jmp_off+1);
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
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27 call(code, opts->handle_cycle_limit);
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
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28 *jmp_off = code->cur - (jmp_off+1);
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
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29 }
589
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30
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f0061e3d2ad9 Fix a few bugs introduced in the Z80 core from the adjustments to fit with the code gen refactor
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31 void check_code_prologue(code_info *code)
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32 {
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33 check_alloc_code(code, MAX_INST_LEN*4);
f0061e3d2ad9 Fix a few bugs introduced in the Z80 core from the adjustments to fit with the code gen refactor
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34 }
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35
593
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36 code_ptr gen_mem_fun(cpu_options * opts, memmap_chunk const * memmap, uint32_t num_chunks, ftype fun_type, code_ptr *after_inc)
589
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37 {
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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38 code_info *code = &opts->code;
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39 code_ptr start = code->cur;
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40 check_cycles(opts);
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41 cycles(opts, opts->bus_cycles);
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ea80559c67cb WIP effort to update z80 core for code gen changes
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42 if (after_inc) {
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43 *after_inc = code->cur;
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44 }
589
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45 if (opts->address_size == SZ_D && opts->address_mask < 0xFFFFFFFF) {
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46 and_ir(code, opts->address_mask, opts->scratch1, SZ_D);
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47 }
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48 code_ptr lb_jcc = NULL, ub_jcc = NULL;
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49 uint8_t is_write = fun_type == WRITE_16 || fun_type == WRITE_8;
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50 uint8_t adr_reg = is_write ? opts->scratch2 : opts->scratch1;
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51 uint16_t access_flag = is_write ? MMAP_WRITE : MMAP_READ;
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52 uint8_t size = (fun_type == READ_16 || fun_type == WRITE_16) ? SZ_W : SZ_B;
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53 for (uint32_t chunk = 0; chunk < num_chunks; chunk++)
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54 {
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55 if (memmap[chunk].start > 0) {
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56 cmp_ir(code, memmap[chunk].start, adr_reg, opts->address_size);
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57 lb_jcc = code->cur + 1;
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58 jcc(code, CC_C, code->cur + 2);
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59 }
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60 if (memmap[chunk].end < opts->max_address) {
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61 cmp_ir(code, memmap[chunk].end, adr_reg, opts->address_size);
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62 ub_jcc = code->cur + 1;
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63 jcc(code, CC_NC, code->cur + 2);
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64 }
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65
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66 if (memmap[chunk].mask != opts->address_mask) {
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67 and_ir(code, memmap[chunk].mask, adr_reg, opts->address_size);
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68 }
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69 void * cfun;
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70 switch (fun_type)
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71 {
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72 case READ_16:
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73 cfun = memmap[chunk].read_16;
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74 break;
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75 case READ_8:
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76 cfun = memmap[chunk].read_8;
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77 break;
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78 case WRITE_16:
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79 cfun = memmap[chunk].write_16;
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80 break;
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81 case WRITE_8:
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82 cfun = memmap[chunk].write_8;
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83 break;
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84 default:
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85 cfun = NULL;
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diff changeset
86 }
604
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87 if(memmap[chunk].flags & access_flag) {
589
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88 if (memmap[chunk].flags & MMAP_PTR_IDX) {
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diff changeset
89 if (memmap[chunk].flags & MMAP_FUNC_NULL) {
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diff changeset
90 cmp_irdisp(code, 0, opts->context_reg, opts->mem_ptr_off + sizeof(void*) * memmap[chunk].ptr_index, SZ_PTR);
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91 code_ptr not_null = code->cur + 1;
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diff changeset
92 jcc(code, CC_NZ, code->cur + 2);
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diff changeset
93 call(code, opts->save_context);
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diff changeset
94 #ifdef X86_64
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diff changeset
95 if (is_write) {
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diff changeset
96 if (opts->scratch2 != RDI) {
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diff changeset
97 mov_rr(code, opts->scratch2, RDI, opts->address_size);
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98 }
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diff changeset
99 mov_rr(code, opts->scratch1, RDX, size);
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100 } else {
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diff changeset
101 push_r(code, opts->context_reg);
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102 mov_rr(code, opts->scratch1, RDI, opts->address_size);
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103 }
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104 test_ir(code, 8, RSP, opts->address_size);
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diff changeset
105 code_ptr adjust_rsp = code->cur + 1;
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106 jcc(code, CC_NZ, code->cur + 2);
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diff changeset
107 call(code, cfun);
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108 code_ptr no_adjust = code->cur + 1;
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109 jmp(code, code->cur + 2);
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110 *adjust_rsp = code->cur - (adjust_rsp + 1);
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diff changeset
111 sub_ir(code, 8, RSP, SZ_PTR);
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diff changeset
112 call(code, cfun);
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113 add_ir(code, 8, RSP, SZ_PTR);
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114 *no_adjust = code->cur - (no_adjust + 1);
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115 #else
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116 if (is_write) {
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117 push_r(code, opts->scratch1);
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118 } else {
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119 push_r(code, opts->context_reg);//save opts->context_reg for later
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120 }
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121 push_r(code, opts->context_reg);
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122 push_r(code, is_write ? opts->scratch2 : opts->scratch1);
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123 call(code, cfun);
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124 add_ir(code, is_write ? 12 : 8, RSP, opts->address_size);
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diff changeset
125 #endif
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126 if (is_write) {
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127 mov_rr(code, RAX, opts->context_reg, SZ_PTR);
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128 } else {
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129 pop_r(code, opts->context_reg);
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130 mov_rr(code, RAX, opts->scratch1, size);
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131 }
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132 jmp(code, opts->load_context);
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133
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134 *not_null = code->cur - (not_null + 1);
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135 }
604
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136 if ((opts->byte_swap || memmap[chunk].flags & MMAP_BYTESWAP) && size == SZ_B) {
589
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137 xor_ir(code, 1, adr_reg, opts->address_size);
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138 }
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139 if (opts->address_size != SZ_D) {
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140 movzx_rr(code, adr_reg, adr_reg, opts->address_size, SZ_D);
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141 }
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diff changeset
142 add_rdispr(code, opts->context_reg, opts->mem_ptr_off + sizeof(void*) * memmap[chunk].ptr_index, adr_reg, SZ_PTR);
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143 if (is_write) {
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diff changeset
144 mov_rrind(code, opts->scratch1, opts->scratch2, size);
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145
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146 } else {
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diff changeset
147 mov_rindr(code, opts->scratch1, opts->scratch1, size);
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148 }
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149 } else {
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diff changeset
150 uint8_t tmp_size = size;
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diff changeset
151 if (size == SZ_B) {
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152 if ((memmap[chunk].flags & MMAP_ONLY_ODD) || (memmap[chunk].flags & MMAP_ONLY_EVEN)) {
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diff changeset
153 bt_ir(code, 0, adr_reg, opts->address_size);
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diff changeset
154 code_ptr good_addr = code->cur + 1;
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diff changeset
155 jcc(code, (memmap[chunk].flags & MMAP_ONLY_ODD) ? CC_C : CC_NC, code->cur + 2);
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diff changeset
156 if (!is_write) {
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diff changeset
157 mov_ir(code, 0xFF, opts->scratch1, SZ_B);
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158 }
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diff changeset
159 retn(code);
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diff changeset
160 *good_addr = code->cur - (good_addr + 1);
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diff changeset
161 shr_ir(code, 1, adr_reg, opts->address_size);
604
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diff changeset
162 } else if (opts->byte_swap || memmap[chunk].flags & MMAP_BYTESWAP) {
589
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diff changeset
163 xor_ir(code, 1, adr_reg, opts->address_size);
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164 }
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diff changeset
165 } else if ((memmap[chunk].flags & MMAP_ONLY_ODD) || (memmap[chunk].flags & MMAP_ONLY_EVEN)) {
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diff changeset
166 tmp_size = SZ_B;
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diff changeset
167 shr_ir(code, 1, adr_reg, opts->address_size);
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diff changeset
168 if ((memmap[chunk].flags & MMAP_ONLY_EVEN) && is_write) {
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diff changeset
169 shr_ir(code, 8, opts->scratch1, SZ_W);
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170 }
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diff changeset
171 }
595
68f86ca4bb32 Add a couple of missing checks for the byte_swap and address_size parameters in gen_mem_fun
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diff changeset
172 if (opts->address_size != SZ_D) {
68f86ca4bb32 Add a couple of missing checks for the byte_swap and address_size parameters in gen_mem_fun
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diff changeset
173 movzx_rr(code, adr_reg, adr_reg, opts->address_size, SZ_D);
68f86ca4bb32 Add a couple of missing checks for the byte_swap and address_size parameters in gen_mem_fun
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diff changeset
174 }
589
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diff changeset
175 if ((intptr_t)memmap[chunk].buffer <= 0x7FFFFFFF && (intptr_t)memmap[chunk].buffer >= -2147483648) {
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
176 if (is_write) {
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diff changeset
177 mov_rrdisp(code, opts->scratch1, opts->scratch2, (intptr_t)memmap[chunk].buffer, tmp_size);
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diff changeset
178 } else {
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diff changeset
179 mov_rdispr(code, opts->scratch1, (intptr_t)memmap[chunk].buffer, opts->scratch1, tmp_size);
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180 }
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diff changeset
181 } else {
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diff changeset
182 if (is_write) {
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diff changeset
183 push_r(code, opts->scratch1);
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diff changeset
184 mov_ir(code, (intptr_t)memmap[chunk].buffer, opts->scratch1, SZ_PTR);
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diff changeset
185 add_rr(code, opts->scratch1, opts->scratch2, SZ_PTR);
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diff changeset
186 pop_r(code, opts->scratch1);
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diff changeset
187 mov_rrind(code, opts->scratch1, opts->scratch2, tmp_size);
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diff changeset
188 } else {
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diff changeset
189 mov_ir(code, (intptr_t)memmap[chunk].buffer, opts->scratch2, SZ_PTR);
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diff changeset
190 mov_rindexr(code, opts->scratch2, opts->scratch1, 1, opts->scratch1, tmp_size);
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191 }
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192 }
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diff changeset
193 if (size != tmp_size && !is_write) {
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diff changeset
194 if (memmap[chunk].flags & MMAP_ONLY_EVEN) {
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diff changeset
195 shl_ir(code, 8, opts->scratch1, SZ_W);
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diff changeset
196 mov_ir(code, 0xFF, opts->scratch1, SZ_B);
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diff changeset
197 } else {
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diff changeset
198 or_ir(code, 0xFF00, opts->scratch1, SZ_W);
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199 }
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200 }
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diff changeset
201 }
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diff changeset
202 if (is_write && (memmap[chunk].flags & MMAP_CODE)) {
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diff changeset
203 mov_rr(code, opts->scratch2, opts->scratch1, opts->address_size);
620
9d6fed6501ba Fix handling of code writes for Z80 core. This seems to get things close to being back to where they were before the big refactor that broke the Z80 core. Some problems remain. Notably the sound driver in Sonic 2 is still quite broken.
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parents: 604
diff changeset
204 shr_ir(code, opts->ram_flags_shift, opts->scratch1, opts->address_size);
589
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
205 bt_rrdisp(code, opts->scratch1, opts->context_reg, opts->ram_flags_off, opts->address_size);
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diff changeset
206 code_ptr not_code = code->cur + 1;
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diff changeset
207 jcc(code, CC_NC, code->cur + 2);
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diff changeset
208 call(code, opts->save_context);
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diff changeset
209 #ifdef X86_32
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diff changeset
210 push_r(code, opts->context_reg);
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diff changeset
211 push_r(code, opts->scratch2);
620
9d6fed6501ba Fix handling of code writes for Z80 core. This seems to get things close to being back to where they were before the big refactor that broke the Z80 core. Some problems remain. Notably the sound driver in Sonic 2 is still quite broken.
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parents: 604
diff changeset
212 #else
9d6fed6501ba Fix handling of code writes for Z80 core. This seems to get things close to being back to where they were before the big refactor that broke the Z80 core. Some problems remain. Notably the sound driver in Sonic 2 is still quite broken.
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diff changeset
213 if (opts->scratch2 != RDI) {
9d6fed6501ba Fix handling of code writes for Z80 core. This seems to get things close to being back to where they were before the big refactor that broke the Z80 core. Some problems remain. Notably the sound driver in Sonic 2 is still quite broken.
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diff changeset
214 mov_rr(code, opts->scratch2, RDI, opts->address_size);
9d6fed6501ba Fix handling of code writes for Z80 core. This seems to get things close to being back to where they were before the big refactor that broke the Z80 core. Some problems remain. Notably the sound driver in Sonic 2 is still quite broken.
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parents: 604
diff changeset
215 }
589
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
216 #endif
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diff changeset
217 call(code, opts->handle_code_write);
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diff changeset
218 #ifdef X86_32
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diff changeset
219 add_ir(code, 8, RSP, SZ_D);
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diff changeset
220 #endif
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diff changeset
221 mov_rr(code, RAX, opts->context_reg, SZ_PTR);
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diff changeset
222 call(code, opts->load_context);
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223 *not_code = code->cur - (not_code+1);
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224 }
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diff changeset
225 retn(code);
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diff changeset
226 } else if (cfun) {
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diff changeset
227 call(code, opts->save_context);
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diff changeset
228 #ifdef X86_64
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229 if (is_write) {
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diff changeset
230 if (opts->scratch2 != RDI) {
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diff changeset
231 mov_rr(code, opts->scratch2, RDI, opts->address_size);
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232 }
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diff changeset
233 mov_rr(code, opts->scratch1, RDX, size);
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diff changeset
234 } else {
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diff changeset
235 push_r(code, opts->context_reg);
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diff changeset
236 mov_rr(code, opts->scratch1, RDI, opts->address_size);
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diff changeset
237 }
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diff changeset
238 test_ir(code, 8, RSP, SZ_D);
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diff changeset
239 code_ptr adjust_rsp = code->cur + 1;
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diff changeset
240 jcc(code, CC_NZ, code->cur + 2);
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diff changeset
241 call(code, cfun);
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diff changeset
242 code_ptr no_adjust = code->cur + 1;
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diff changeset
243 jmp(code, code->cur + 2);
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diff changeset
244 *adjust_rsp = code->cur - (adjust_rsp + 1);
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diff changeset
245 sub_ir(code, 8, RSP, SZ_PTR);
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
246 call(code, cfun);
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diff changeset
247 add_ir(code, 8, RSP, SZ_PTR);
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diff changeset
248 *no_adjust = code->cur - (no_adjust+1);
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diff changeset
249 #else
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diff changeset
250 if (is_write) {
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diff changeset
251 push_r(code, opts->scratch1);
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diff changeset
252 } else {
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diff changeset
253 push_r(code, opts->context_reg);//save opts->context_reg for later
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
254 }
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diff changeset
255 push_r(code, opts->context_reg);
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diff changeset
256 push_r(code, is_write ? opts->scratch2 : opts->scratch1);
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diff changeset
257 call(code, cfun);
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diff changeset
258 add_ir(code, is_write ? 12 : 8, RSP, SZ_D);
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
259 #endif
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diff changeset
260 if (is_write) {
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diff changeset
261 mov_rr(code, RAX, opts->context_reg, SZ_PTR);
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diff changeset
262 } else {
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diff changeset
263 pop_r(code, opts->context_reg);
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diff changeset
264 mov_rr(code, RAX, opts->scratch1, size);
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
265 }
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diff changeset
266 jmp(code, opts->load_context);
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
267 } else {
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
268 //Not sure the best course of action here
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diff changeset
269 if (!is_write) {
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diff changeset
270 mov_ir(code, size == SZ_B ? 0xFF : 0xFFFF, opts->scratch1, size);
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
271 }
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diff changeset
272 retn(code);
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diff changeset
273 }
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
274 if (lb_jcc) {
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diff changeset
275 *lb_jcc = code->cur - (lb_jcc+1);
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
276 lb_jcc = NULL;
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diff changeset
277 }
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
278 if (ub_jcc) {
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
279 *ub_jcc = code->cur - (ub_jcc+1);
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
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diff changeset
280 ub_jcc = NULL;
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diff changeset
281 }
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diff changeset
282 }
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
Michael Pavone <pavone@retrodev.com>
parents: 567
diff changeset
283 if (!is_write) {
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
Michael Pavone <pavone@retrodev.com>
parents: 567
diff changeset
284 mov_ir(code, size == SZ_B ? 0xFF : 0xFFFF, opts->scratch1, size);
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
Michael Pavone <pavone@retrodev.com>
parents: 567
diff changeset
285 }
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
Michael Pavone <pavone@retrodev.com>
parents: 567
diff changeset
286 retn(code);
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
Michael Pavone <pavone@retrodev.com>
parents: 567
diff changeset
287 return start;
2dde38c1744f Split gen_mem_fun out of m68k_core_x86 and make it more generic so it can be used by the Z80 core
Michael Pavone <pavone@retrodev.com>
parents: 567
diff changeset
288 }