177 lines
4.3 KiB
C
177 lines
4.3 KiB
C
static int opCMC(uint32_t fetchdat)
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{
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flags_rebuild();
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flags ^= C_FLAG;
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cycles -= 2;
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return 0;
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}
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static int opCLC(uint32_t fetchdat)
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{
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flags_rebuild();
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flags &= ~C_FLAG;
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cycles -= 2;
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return 0;
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}
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static int opCLD(uint32_t fetchdat)
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{
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flags &= ~D_FLAG;
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cycles -= 2;
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return 0;
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}
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static int opCLI(uint32_t fetchdat)
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{
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if (!IOPLp)
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{
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x86gpf(NULL,0);
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}
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else
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flags &= ~I_FLAG;
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cycles -= 3;
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return 0;
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}
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static int opSTC(uint32_t fetchdat)
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{
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flags_rebuild();
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flags |= C_FLAG;
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cycles -= 2;
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return 0;
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}
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static int opSTD(uint32_t fetchdat)
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{
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flags |= D_FLAG;
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cycles -= 2;
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return 0;
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}
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static int opSTI(uint32_t fetchdat)
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{
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if (!IOPLp)
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{
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x86gpf(NULL,0);
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}
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else
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flags |= I_FLAG;
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cycles -= 2;
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return 0;
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}
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static int opSAHF(uint32_t fetchdat)
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{
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flags_rebuild();
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flags = (flags & 0xff00) | (AH & 0xd5) | 2;
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cycles -= 3;
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return 0;
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}
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static int opLAHF(uint32_t fetchdat)
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{
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flags_rebuild();
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AH = flags & 0xff;
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cycles -= 3;
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return 0;
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}
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static int opPUSHF(uint32_t fetchdat)
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{
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if (ssegs) ss = oldss;
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if ((eflags & VM_FLAG) && (IOPL < 3))
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{
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x86gpf(NULL,0);
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return 0;
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}
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flags_rebuild();
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PUSH_W(flags);
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cycles -= 4;
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return 0;
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}
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static int opPUSHFD(uint32_t fetchdat)
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{
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uint16_t tempw;
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if (ssegs) ss=oldss;
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if ((eflags & VM_FLAG) && (IOPL < 3))
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{
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x86gpf(NULL, 0);
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return 0;
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}
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if (CPUID) tempw = eflags & 0x24;
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else tempw = eflags & 4;
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flags_rebuild();
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PUSH_L(flags | (tempw << 16));
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cycles -= 4;
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return 0;
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}
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static int opPOPF_286(uint32_t fetchdat)
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{
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uint16_t tempw;
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if (ssegs) ss = oldss;
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if ((eflags & VM_FLAG) && (IOPL < 3))
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{
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x86gpf(NULL, 0);
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return 0;
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}
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tempw = POP_W(); if (abrt) return 0;
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if (!(msw & 1)) flags = (flags & 0x7000) | (tempw & 0x0fd5) | 2;
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else if (!(CPL)) flags = (tempw & 0x7fd5) | 2;
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else if (IOPLp) flags = (flags & 0x3000) | (tempw & 0x4fd5) | 2;
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else flags = (flags & 0x3200) | (tempw & 0x4dd5) | 2;
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flags_extract();
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cycles -= 5;
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return 0;
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}
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static int opPOPF(uint32_t fetchdat)
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{
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uint16_t tempw;
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if (ssegs) ss = oldss;
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if ((eflags & VM_FLAG) && (IOPL < 3))
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{
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x86gpf(NULL, 0);
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return 0;
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}
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tempw = POP_W(); if (abrt) return 0;
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if (!(CPL) || !(msw & 1)) flags = (tempw & 0xffd5) | 2;
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else if (IOPLp) flags = (flags & 0x3000) | (tempw & 0xcfd5) | 2;
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else flags = (flags & 0x3200) | (tempw & 0xcdd5) | 2;
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flags_extract();
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cycles -= 5;
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return 0;
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}
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static int opPOPFD(uint32_t fetchdat)
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{
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uint32_t templ;
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if (ssegs) ss = oldss;
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if ((eflags & VM_FLAG) && (IOPL < 3))
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{
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x86gpf(NULL, 0);
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return 0;
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}
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templ = POP_L(); if (abrt) return 0;
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if (!(CPL) || !(msw & 1)) flags = (templ & 0xffd5) | 2;
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else if (IOPLp) flags = (flags & 0x3000) | (templ & 0xcfd5) | 2;
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else flags = (flags & 0x3200) | (templ & 0xcdd5) | 2;
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templ &= is486 ? 0x240000 : 0;
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templ |= ((eflags&3) << 16);
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if (CPUID) eflags = (templ >> 16) & 0x27;
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else if (is486) eflags = (templ >> 16) & 7;
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else eflags = (templ >> 16) & 3;
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flags_extract();
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cycles -= 5;
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return 0;
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}
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