285 lines
8.1 KiB
C
285 lines
8.1 KiB
C
static int opCMC(uint32_t fetchdat)
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{
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flags_rebuild();
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cpu_state.flags ^= C_FLAG;
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CLOCK_CYCLES(2);
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PREFETCH_RUN(2, 1, -1, 0,0,0,0, 0);
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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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cpu_state.flags &= ~C_FLAG;
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CLOCK_CYCLES(2);
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PREFETCH_RUN(2, 1, -1, 0,0,0,0, 0);
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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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cpu_state.flags &= ~D_FLAG;
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CLOCK_CYCLES(2);
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PREFETCH_RUN(2, 1, -1, 0,0,0,0, 0);
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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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if ((!(cpu_state.eflags & VM_FLAG) && (cr4 & CR4_PVI)) ||
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((cpu_state.eflags & VM_FLAG) && (cr4 & CR4_VME)))
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{
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cpu_state.eflags &= ~VIF_FLAG;
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}
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else
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{
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x86gpf(NULL,0);
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return 1;
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}
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}
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else
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cpu_state.flags &= ~I_FLAG;
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CLOCK_CYCLES(3);
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PREFETCH_RUN(3, 1, -1, 0,0,0,0, 0);
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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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cpu_state.flags |= C_FLAG;
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CLOCK_CYCLES(2);
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PREFETCH_RUN(2, 1, -1, 0,0,0,0, 0);
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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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cpu_state.flags |= D_FLAG;
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CLOCK_CYCLES(2);
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PREFETCH_RUN(2, 1, -1, 0,0,0,0, 0);
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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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if ((!(cpu_state.eflags & VM_FLAG) && (cr4 & CR4_PVI)) ||
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((cpu_state.eflags & VM_FLAG) && (cr4 & CR4_VME)))
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{
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if (cpu_state.eflags & VIP_FLAG)
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{
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x86gpf(NULL,0);
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return 1;
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}
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else
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cpu_state.eflags |= VIF_FLAG;
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}
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else
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{
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x86gpf(NULL,0);
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return 1;
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}
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}
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else
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cpu_state.flags |= I_FLAG;
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CPU_BLOCK_END();
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CLOCK_CYCLES(2);
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PREFETCH_RUN(2, 1, -1, 0,0,0,0, 0);
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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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cpu_state.flags = (cpu_state.flags & 0xff00) | (AH & 0xd5) | 2;
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CLOCK_CYCLES(3);
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PREFETCH_RUN(3, 1, -1, 0,0,0,0, 0);
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#if (defined(USE_DYNAREC) && defined(USE_NEW_DYNAREC))
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codegen_flags_changed = 0;
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#endif
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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 = cpu_state.flags & 0xff;
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CLOCK_CYCLES(3);
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PREFETCH_RUN(3, 1, -1, 0,0,0,0, 0);
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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 ((cpu_state.eflags & VM_FLAG) && (IOPL < 3))
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{
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if (cr4 & CR4_VME)
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{
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uint16_t temp;
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flags_rebuild();
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temp = (cpu_state.flags & ~I_FLAG) | 0x3000;
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if (cpu_state.eflags & VIF_FLAG)
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temp |= I_FLAG;
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PUSH_W(temp);
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}
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else
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{
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x86gpf(NULL,0);
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return 1;
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}
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}
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else
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{
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flags_rebuild();
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PUSH_W(cpu_state.flags);
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}
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CLOCK_CYCLES(4);
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PREFETCH_RUN(4, 1, -1, 0,0,1,0, 0);
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return cpu_state.abrt;
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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 ((cpu_state.eflags & VM_FLAG) && (IOPL < 3))
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{
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x86gpf(NULL, 0);
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return 1;
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}
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if (cpu_CR4_mask & CR4_VME) tempw = cpu_state.eflags & 0x3c;
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else if (CPUID) tempw = cpu_state.eflags & 0x24;
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else tempw = cpu_state.eflags & 4;
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flags_rebuild();
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PUSH_L(cpu_state.flags | (tempw << 16));
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CLOCK_CYCLES(4);
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PREFETCH_RUN(4, 1, -1, 0,0,0,1, 0);
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return cpu_state.abrt;
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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 ((cpu_state.eflags & VM_FLAG) && (IOPL < 3))
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{
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x86gpf(NULL, 0);
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return 1;
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}
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tempw = POP_W(); if (cpu_state.abrt) return 1;
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if (!(msw & 1)) cpu_state.flags = (cpu_state.flags & 0x7000) | (tempw & 0x0fd5) | 2;
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else if (!(CPL)) cpu_state.flags = (tempw & 0x7fd5) | 2;
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else if (IOPLp) cpu_state.flags = (cpu_state.flags & 0x3000) | (tempw & 0x4fd5) | 2;
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else cpu_state.flags = (cpu_state.flags & 0x3200) | (tempw & 0x4dd5) | 2;
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flags_extract();
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CLOCK_CYCLES(5);
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PREFETCH_RUN(5, 1, -1, 1,0,0,0, 0);
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#if (defined(USE_DYNAREC) && defined(USE_NEW_DYNAREC))
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codegen_flags_changed = 0;
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#endif
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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 ((cpu_state.eflags & VM_FLAG) && (IOPL < 3))
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{
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if (cr4 & CR4_VME)
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{
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uint32_t old_esp = ESP;
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tempw = POP_W();
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if (cpu_state.abrt)
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{
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ESP = old_esp;
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return 1;
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}
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if ((tempw & T_FLAG) || ((tempw & I_FLAG) && (cpu_state.eflags & VIP_FLAG)))
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{
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ESP = old_esp;
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x86gpf(NULL, 0);
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return 1;
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}
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if (tempw & I_FLAG)
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cpu_state.eflags |= VIF_FLAG;
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else
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cpu_state.eflags &= ~VIF_FLAG;
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cpu_state.flags = (cpu_state.flags & 0x3200) | (tempw & 0x4dd5) | 2;
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}
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else
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{
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x86gpf(NULL, 0);
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return 1;
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}
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}
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else
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{
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tempw = POP_W();
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if (cpu_state.abrt)
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return 1;
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if (!(CPL) || !(msw & 1))
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cpu_state.flags = (tempw & 0x7fd5) | 2;
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else if (IOPLp)
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cpu_state.flags = (cpu_state.flags & 0x3000) | (tempw & 0x4fd5) | 2;
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else
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cpu_state.flags = (cpu_state.flags & 0x3200) | (tempw & 0x4dd5) | 2;
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}
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flags_extract();
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CLOCK_CYCLES(5);
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PREFETCH_RUN(5, 1, -1, 1,0,0,0, 0);
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#if (defined(USE_DYNAREC) && defined(USE_NEW_DYNAREC))
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codegen_flags_changed = 0;
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#endif
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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 ((cpu_state.eflags & VM_FLAG) && (IOPL < 3))
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{
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x86gpf(NULL, 0);
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return 1;
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}
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templ = POP_L(); if (cpu_state.abrt) return 1;
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if (!(CPL) || !(msw & 1)) cpu_state.flags = (templ & 0x7fd5) | 2;
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else if (IOPLp) cpu_state.flags = (cpu_state.flags & 0x3000) | (templ & 0x4fd5) | 2;
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else cpu_state.flags = (cpu_state.flags & 0x3200) | (templ & 0x4dd5) | 2;
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templ &= (is486 || isibm486) ? 0x3c0000 : 0;
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templ |= ((cpu_state.eflags&3) << 16);
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if (cpu_CR4_mask & CR4_VME) cpu_state.eflags = (templ >> 16) & 0x3f;
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else if (CPUID) cpu_state.eflags = (templ >> 16) & 0x27;
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else if (is486 || isibm486) cpu_state.eflags = (templ >> 16) & 7;
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else cpu_state.eflags = (templ >> 16) & 3;
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flags_extract();
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CLOCK_CYCLES(5);
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PREFETCH_RUN(5, 1, -1, 0,1,0,0, 0);
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#if (defined(USE_DYNAREC) && defined(USE_NEW_DYNAREC))
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codegen_flags_changed = 0;
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#endif
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return 0;
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}
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