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Added Pentium and Pentium MMX emulation.

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This commit is contained in:
TomW 2014-11-17 20:41:02 +00:00
commit 13226a2bd4
13 changed files with 1536 additions and 16 deletions
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63
src/x86_ops_atomic.h
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@ -109,6 +109,69 @@ static int opCMPXCHG_l_a32(uint32_t fetchdat)
return 0;
}
static int opCMPXCHG8B_a16(uint32_t fetchdat)
{
uint32_t temp, temp_hi, temp2 = EAX, temp2_hi = EDX;
if (!is486)
{
pc = oldpc;
x86illegal();
return 0;
}
fetch_ea_16(fetchdat);
temp = geteal();
temp_hi = readmeml(easeg, eaaddr + 4); if (abrt) return 0;
if (EAX == temp && EDX == temp_hi)
{
seteal(EBX);
writememl(easeg, eaaddr+4, ECX);
}
else
{
EAX = temp;
EDX = temp_hi;
}
if (abrt) return 0;
flags_rebuild();
if (temp == temp2 && temp_hi == temp2_hi)
flags |= Z_FLAG;
else
flags &= ~Z_FLAG;
cycles -= (mod == 3) ? 6 : 10;
return 0;
}
static int opCMPXCHG8B_a32(uint32_t fetchdat)
{
uint32_t temp, temp_hi, temp2 = EAX, temp2_hi = EDX;
if (!is486)
{
pc = oldpc;
x86illegal();
return 0;
}
fetch_ea_32(fetchdat);
temp = geteal();
temp_hi = readmeml(easeg, eaaddr + 4); if (abrt) return 0;
if (EAX == temp && EDX == temp_hi)
{
seteal(EBX);
writememl(easeg, eaaddr+4, ECX);
}
else
{
EAX = temp;
EDX = temp_hi;
}
if (abrt) return 0;
flags_rebuild();
if (temp == temp2 && temp_hi == temp2_hi)
flags |= Z_FLAG;
else
flags &= ~Z_FLAG;
cycles -= (mod == 3) ? 6 : 10;
return 0;
}
static int opXADD_b_a16(uint32_t fetchdat)
{
uint8_t temp;