mirror of
https://github.com/Oibaf66/uae-wii.git
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50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
/*
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* UAE - The Un*x Amiga Emulator
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*
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* MC68000 emulation - machine dependent bits
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*
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* Copyright 1996 Bernd Schmidt
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*/
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struct flag_struct {
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unsigned int c;
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unsigned int z;
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unsigned int n;
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unsigned int v;
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unsigned int x;
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};
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extern struct flag_struct regflags;
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#define ZFLG (regflags.z)
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#define NFLG (regflags.n)
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#define CFLG (regflags.c)
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#define VFLG (regflags.v)
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#define XFLG (regflags.x)
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static __inline__ int cctrue(const int cc)
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{
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switch(cc){
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case 0: return 1; /* T */
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case 1: return 0; /* F */
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case 2: return !CFLG && !ZFLG; /* HI */
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case 3: return CFLG || ZFLG; /* LS */
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case 4: return !CFLG; /* CC */
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case 5: return CFLG; /* CS */
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case 6: return !ZFLG; /* NE */
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case 7: return ZFLG; /* EQ */
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case 8: return !VFLG; /* VC */
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case 9: return VFLG; /* VS */
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case 10:return !NFLG; /* PL */
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case 11:return NFLG; /* MI */
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case 12:return NFLG == VFLG; /* GE */
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case 13:return NFLG != VFLG; /* LT */
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case 14:return !ZFLG && (NFLG == VFLG); /* GT */
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case 15:return ZFLG || (NFLG != VFLG); /* LE */
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}
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abort();
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return 0;
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}
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