108 lines
2.4 KiB
C
108 lines
2.4 KiB
C
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static int opAAA(uint32_t fetchdat)
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{
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flags_rebuild();
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if ((flags & A_FLAG) || ((AL & 0xF) > 9))
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{
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AL += 6;
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AH++;
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flags |= (A_FLAG | C_FLAG);
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}
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else
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flags &= ~(A_FLAG | C_FLAG);
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AL &= 0xF;
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CLOCK_CYCLES(is486 ? 3 : 4);
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return 0;
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}
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static int opAAD(uint32_t fetchdat)
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{
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int base = getbytef();
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if (cpu_manufacturer != MANU_INTEL) base = 10;
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AL = (AH * base) + AL;
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AH = 0;
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setznp16(AX);
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CLOCK_CYCLES((is486) ? 14 : 19);
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return 0;
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}
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static int opAAM(uint32_t fetchdat)
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{
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int base = getbytef();
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if (!base || cpu_manufacturer != MANU_INTEL) base = 10;
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AH = AL / base;
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AL %= base;
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setznp16(AX);
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CLOCK_CYCLES((is486) ? 15 : 17);
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return 0;
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}
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static int opAAS(uint32_t fetchdat)
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{
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flags_rebuild();
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if ((flags & A_FLAG) || ((AL & 0xF) > 9))
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{
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AL -= 6;
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AH--;
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flags |= (A_FLAG | C_FLAG);
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}
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else
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flags &= ~(A_FLAG | C_FLAG);
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AL &= 0xF;
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CLOCK_CYCLES(is486 ? 3 : 4);
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return 0;
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}
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static int opDAA(uint32_t fetchdat)
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{
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uint16_t tempw;
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flags_rebuild();
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if ((flags & A_FLAG) || ((AL & 0xf) > 9))
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{
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int tempi = ((uint16_t)AL) + 6;
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AL += 6;
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flags |= A_FLAG;
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if (tempi & 0x100) flags |= C_FLAG;
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}
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if ((flags & C_FLAG) || (AL > 0x9f))
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{
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AL += 0x60;
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flags |= C_FLAG;
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}
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tempw = flags & (C_FLAG | A_FLAG);
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setznp8(AL);
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flags_rebuild();
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flags |= tempw;
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CLOCK_CYCLES(4);
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return 0;
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}
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static int opDAS(uint32_t fetchdat)
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{
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uint16_t tempw;
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flags_rebuild();
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if ((flags & A_FLAG) || ((AL & 0xf) > 9))
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{
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int tempi = ((uint16_t)AL) - 6;
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AL -= 6;
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flags |= A_FLAG;
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if (tempi & 0x100) flags |= C_FLAG;
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}
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if ((flags & C_FLAG) || (AL > 0x9f))
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{
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AL -= 0x60;
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flags |= C_FLAG;
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}
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tempw = flags & (C_FLAG | A_FLAG);
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setznp8(AL);
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flags_rebuild();
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flags |= tempw;
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CLOCK_CYCLES(4);
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return 0;
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}
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