diff options
Diffstat (limited to 'trunk/src/emu/cpu/i86/modrm.h')
-rw-r--r-- | trunk/src/emu/cpu/i86/modrm.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/trunk/src/emu/cpu/i86/modrm.h b/trunk/src/emu/cpu/i86/modrm.h new file mode 100644 index 00000000000..5919ebf230a --- /dev/null +++ b/trunk/src/emu/cpu/i86/modrm.h @@ -0,0 +1,119 @@ +static struct +{ + struct + { + WREGS w[256]; + BREGS b[256]; + } reg; + struct + { + WREGS w[256]; + BREGS b[256]; + } RM; +} Mod_RM; + +#define RegWord(ModRM) cpustate->regs.w[Mod_RM.reg.w[ModRM]] +#define RegByte(ModRM) cpustate->regs.b[Mod_RM.reg.b[ModRM]] + +#define GetRMWord(ModRM) \ + ((ModRM) >= 0xc0 ? cpustate->regs.w[Mod_RM.RM.w[ModRM]] : ( (*GetEA[ModRM])(cpustate), ReadWord( cpustate->ea ) )) + +#define PutbackRMWord(ModRM,val) \ +{ \ + if (ModRM >= 0xc0) cpustate->regs.w[Mod_RM.RM.w[ModRM]]=val; \ + else WriteWord(cpustate->ea,val); \ +} + +#define GetnextRMWord ReadWord(cpustate->ea+2) + +#define GetRMWordOffset(offs) \ + ReadWord(cpustate->ea-cpustate->eo+(UINT16)(cpustate->eo+offs)) + +#define GetRMByteOffset(offs) \ + ReadByte(cpustate->ea-cpustate->eo+(UINT16)(cpustate->eo+offs)) + +#define PutRMWord(ModRM,val) \ +{ \ + if (ModRM >= 0xc0) \ + cpustate->regs.w[Mod_RM.RM.w[ModRM]]=val; \ + else { \ + (*GetEA[ModRM])(cpustate); \ + WriteWord( cpustate->ea ,val); \ + } \ +} + +#define PutRMWordOffset(offs, val) \ + WriteWord( cpustate->ea-cpustate->eo+(UINT16)(cpustate->eo+offs), val) + +#define PutRMByteOffset(offs, val) \ + WriteByte( cpustate->ea-cpustate->eo+(UINT16)(cpustate->eo+offs), val) + +#define PutImmRMWord(ModRM) \ +{ \ + WORD val; \ + if (ModRM >= 0xc0) \ + FETCHWORD(cpustate->regs.w[Mod_RM.RM.w[ModRM]]) \ + else { \ + (*GetEA[ModRM])(cpustate); \ + FETCHWORD(val) \ + WriteWord( cpustate->ea , val); \ + } \ +} + +#define GetRMByte(ModRM) \ + ((ModRM) >= 0xc0 ? cpustate->regs.b[Mod_RM.RM.b[ModRM]] : ReadByte( (*GetEA[ModRM])(cpustate) )) + +#define PutRMByte(ModRM,val) \ +{ \ + if (ModRM >= 0xc0) \ + cpustate->regs.b[Mod_RM.RM.b[ModRM]]=val; \ + else \ + WriteByte( (*GetEA[ModRM])(cpustate) ,val); \ +} + +#define PutImmRMByte(ModRM) \ +{ \ + if (ModRM >= 0xc0) \ + cpustate->regs.b[Mod_RM.RM.b[ModRM]]=FETCH; \ + else { \ + (*GetEA[ModRM])(cpustate); \ + WriteByte( cpustate->ea , FETCH ); \ + } \ +} + +#define PutbackRMByte(ModRM,val) \ +{ \ + if (ModRM >= 0xc0) \ + cpustate->regs.b[Mod_RM.RM.b[ModRM]]=val; \ + else \ + WriteByte(cpustate->ea,val); \ +} + +#define DEF_br8(dst,src) \ + unsigned ModRM = FETCHOP; \ + unsigned src = RegByte(ModRM); \ + unsigned dst = GetRMByte(ModRM) + +#define DEF_wr16(dst,src) \ + unsigned ModRM = FETCHOP; \ + unsigned src = RegWord(ModRM); \ + unsigned dst = GetRMWord(ModRM) + +#define DEF_r8b(dst,src) \ + unsigned ModRM = FETCHOP; \ + unsigned dst = RegByte(ModRM); \ + unsigned src = GetRMByte(ModRM) + +#define DEF_r16w(dst,src) \ + unsigned ModRM = FETCHOP; \ + unsigned dst = RegWord(ModRM); \ + unsigned src = GetRMWord(ModRM) + +#define DEF_ald8(dst,src) \ + unsigned src = FETCHOP; \ + unsigned dst = cpustate->regs.b[AL] + +#define DEF_axd16(dst,src) \ + unsigned src = FETCHOP; \ + unsigned dst = cpustate->regs.w[AX]; \ + src += (FETCH << 8) |