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Cyrix 6x86 emulation. Based on patch from leilei.

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Moved MOV TRx, reg to correct opcode - required by Award 430VX BIOS with 6x86.
This commit is contained in:
SarahW 2016-04-27 22:23:49 +01:00
commit 153c22e442
15 changed files with 1810 additions and 18 deletions
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52
src/x87_ops_arith.h
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@ -192,6 +192,32 @@ static int opFUCOMPP(uint32_t fetchdat)
return 0;
}
static int opFCOMI(uint32_t fetchdat)
{
FP_ENTER();
cpu_state.pc++;
if (fplog) pclog("FICOM\n");
flags_rebuild();
flags &= ~(Z_FLAG | P_FLAG | C_FLAG);
if (ST(0) == ST(fetchdat & 7)) flags |= Z_FLAG;
else if (ST(0) < ST(fetchdat & 7)) flags |= C_FLAG;
CLOCK_CYCLES(4);
return 0;
}
static int opFCOMIP(uint32_t fetchdat)
{
FP_ENTER();
cpu_state.pc++;
if (fplog) pclog("FICOMP\n");
flags_rebuild();
flags &= ~(Z_FLAG | P_FLAG | C_FLAG);
if (ST(0) == ST(fetchdat & 7)) flags |= Z_FLAG;
else if (ST(0) < ST(fetchdat & 7)) flags |= C_FLAG;
x87_pop();
CLOCK_CYCLES(4);
return 0;
}
static int opFDIV(uint32_t fetchdat)
{
FP_ENTER();
@ -374,3 +400,29 @@ static int opFUCOMP(uint32_t fetchdat)
CLOCK_CYCLES(4);
return 0;
}
static int opFUCOMI(uint32_t fetchdat)
{
FP_ENTER();
cpu_state.pc++;
if (fplog) pclog("FUCOMI\n");
flags_rebuild();
flags &= ~(Z_FLAG | P_FLAG | C_FLAG);
if (ST(0) == ST(fetchdat & 7)) flags |= Z_FLAG;
else if (ST(0) < ST(fetchdat & 7)) flags |= C_FLAG;
CLOCK_CYCLES(4);
return 0;
}
static int opFUCOMIP(uint32_t fetchdat)
{
FP_ENTER();
cpu_state.pc++;
if (fplog) pclog("FUCOMIP\n");
flags_rebuild();
flags &= ~(Z_FLAG | P_FLAG | C_FLAG);
if (ST(0) == ST(fetchdat & 7)) flags |= Z_FLAG;
else if (ST(0) < ST(fetchdat & 7)) flags |= C_FLAG;
x87_pop();
CLOCK_CYCLES(4);
return 0;
}