52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
#define SSATB(val) (((val) < -128) ? -128 : (((val) > 127) ? 127 : (val)))
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#define SSATW(val) (((val) < -32768) ? -32768 : (((val) > 32767) ? 32767 : (val)))
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#define USATB(val) (((val) < 0) ? 0 : (((val) > 255) ? 255 : (val)))
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#define USATW(val) (((val) < 0) ? 0 : (((val) > 65535) ? 65535 : (val)))
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#define MMX_GETREGP(r) MMP[r]
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#define MMX_GETREG(r) *(MMP[r])
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#define MMX_SETEXP(r) \
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*(MMEP[r]) = 0xffff
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#define MMX_GETSRC() \
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if (cpu_mod == 3) { \
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src = MMX_GETREG(cpu_rm); \
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CLOCK_CYCLES(1); \
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} else { \
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SEG_CHECK_READ(cpu_state.ea_seg); \
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src.q = readmemq(easeg, cpu_state.eaaddr); \
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if (cpu_state.abrt) \
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return 1; \
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CLOCK_CYCLES(2); \
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}
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#define MMX_ENTER() \
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if (!cpu_has_feature(CPU_FEATURE_MMX)) { \
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cpu_state.pc = cpu_state.oldpc; \
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x86illegal(); \
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return 1; \
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} \
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if (cr0 & 0xc) { \
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x86_int(7); \
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return 1; \
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} \
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x87_set_mmx()
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static int
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opEMMS(UNUSED(uint32_t fetchdat))
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{
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if (!cpu_has_feature(CPU_FEATURE_MMX)) {
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cpu_state.pc = cpu_state.oldpc;
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x86illegal();
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return 1;
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}
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if (cr0 & 0xc) {
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x86_int(7);
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return 1;
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}
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x87_emms();
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CLOCK_CYCLES(100); /*Guess*/
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return 0;
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}
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