c02b195ede
split.c: made the "split" return the actual result instead of just 0. [Oliver Stöneberg] clifront.c: made the identation of the CPU device in -listdevices the same like the others [Oliver Stöneberg] i386.c: gave some fatalerror() calls in the i386 proper messages [Oliver Stöneberg] ssem.c: fixed compilation of SSEM core with SSEM_DISASM_ON_UNIMPL [Oliver Stöneberg] srcclean.c: small wording change in the srcclean summary [Oliver Stöneberg] sdl/window.c: fixed a potential memory leak in sdlwindow_video_window_create() [Oliver Stöneberg]
54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
// Pentium+ specific opcodes
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static void PENTIUMOP(rdmsr)(i386_state *cpustate) // Opcode 0x0f 32
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{
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// TODO
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CYCLES(cpustate,CYCLES_RDMSR);
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}
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static void PENTIUMOP(wrmsr)(i386_state *cpustate) // Opcode 0x0f 30
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{
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// TODO
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CYCLES(cpustate,1); // TODO: correct cycle count
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}
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static void PENTIUMOP(rdtsc)(i386_state *cpustate) // Opcode 0x0f 31
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{
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UINT64 ts = cpustate->tsc + (cpustate->base_cycles - cpustate->cycles);
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REG32(EAX) = (UINT32)(ts);
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REG32(EDX) = (UINT32)(ts >> 32);
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CYCLES(cpustate,CYCLES_RDTSC);
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}
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static void I386OP(cyrix_unknown)(i386_state *cpustate) // Opcode 0x0f 74
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{
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CYCLES(cpustate,1);
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}
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static void PENTIUMOP(cmpxchg8b_m64)(i386_state *cpustate) // Opcode 0x0f c7
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{
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UINT8 modm = FETCH(cpustate);
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if( modm >= 0xc0 ) {
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fatalerror("pentium: cmpxchg8b_m64 - invalid modm");
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} else {
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UINT32 ea = GetEA(cpustate,modm);
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UINT64 value = READ64(cpustate,ea);
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UINT64 edx_eax = (((UINT64) REG32(EDX)) << 32) | REG32(EAX);
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UINT64 ecx_ebx = (((UINT64) REG32(ECX)) << 32) | REG32(EBX);
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if( value == edx_eax ) {
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WRITE64(cpustate,ea, ecx_ebx);
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cpustate->ZF = 1;
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CYCLES(cpustate,CYCLES_CMPXCHG_REG_MEM_T);
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} else {
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REG32(EDX) = (UINT32) (value >> 32);
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REG32(EAX) = (UINT32) (value >> 0);
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cpustate->ZF = 0;
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CYCLES(cpustate,CYCLES_CMPXCHG_REG_MEM_F);
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}
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}
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}
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