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Initial submission of the PCem-Experimental source code.

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This commit is contained in:
OBattler
2016-06-26 00:34:39 +02:00
parent 09d7c4384f
commit fd2a5bc9f5
610 changed files with 184352 additions and 0 deletions
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107
src/x86_ops_bcd.h Normal file
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static int opAAA(uint32_t fetchdat)
{
flags_rebuild();
if ((flags & A_FLAG) || ((AL & 0xF) > 9))
{
AL += 6;
AH++;
flags |= (A_FLAG | C_FLAG);
}
else
flags &= ~(A_FLAG | C_FLAG);
AL &= 0xF;
CLOCK_CYCLES(is486 ? 3 : 4);
return 0;
}
static int opAAD(uint32_t fetchdat)
{
int base = getbytef();
if (cpu_manufacturer != MANU_INTEL) base = 10;
AL = (AH * base) + AL;
AH = 0;
setznp16(AX);
CLOCK_CYCLES((is486) ? 14 : 19);
return 0;
}
static int opAAM(uint32_t fetchdat)
{
int base = getbytef();
if (!base || cpu_manufacturer != MANU_INTEL) base = 10;
AH = AL / base;
AL %= base;
setznp16(AX);
CLOCK_CYCLES((is486) ? 15 : 17);
return 0;
}
static int opAAS(uint32_t fetchdat)
{
flags_rebuild();
if ((flags & A_FLAG) || ((AL & 0xF) > 9))
{
AL -= 6;
AH--;
flags |= (A_FLAG | C_FLAG);
}
else
flags &= ~(A_FLAG | C_FLAG);
AL &= 0xF;
CLOCK_CYCLES(is486 ? 3 : 4);
return 0;
}
static int opDAA(uint32_t fetchdat)
{
uint16_t tempw;
flags_rebuild();
if ((flags & A_FLAG) || ((AL & 0xf) > 9))
{
int tempi = ((uint16_t)AL) + 6;
AL += 6;
flags |= A_FLAG;
if (tempi & 0x100) flags |= C_FLAG;
}
if ((flags & C_FLAG) || (AL > 0x9f))
{
AL += 0x60;
flags |= C_FLAG;
}
tempw = flags & (C_FLAG | A_FLAG);
setznp8(AL);
flags_rebuild();
flags |= tempw;
CLOCK_CYCLES(4);
return 0;
}
static int opDAS(uint32_t fetchdat)
{
uint16_t tempw;
flags_rebuild();
if ((flags & A_FLAG) || ((AL & 0xf) > 9))
{
int tempi = ((uint16_t)AL) - 6;
AL -= 6;
flags |= A_FLAG;
if (tempi & 0x100) flags |= C_FLAG;
}
if ((flags & C_FLAG) || (AL > 0x9f))
{
AL -= 0x60;
flags |= C_FLAG;
}
tempw = flags & (C_FLAG | A_FLAG);
setznp8(AL);
flags_rebuild();
flags |= tempw;
CLOCK_CYCLES(4);
return 0;
}