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Added FENI/FDISI for 8087.

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This commit is contained in:
SarahW 2020-01-24 20:33:59 +00:00
commit ea4dd4047c
2 changed files with 31 additions and 2 deletions
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27
src/x87_ops_misc.h
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@ -1,3 +1,30 @@
static int opFDISI(uint32_t fetchdat)
{
FP_ENTER();
cpu_state.pc++;
if (fpu_type == FPU_8087)
{
cpu_state.npxc |= FPCW_DISI;
CLOCK_CYCLES(x87_timings.fdisi_eni);
}
else
CLOCK_CYCLES(x87_timings.fnop);
return 0;
}
static int opFENI(uint32_t fetchdat)
{
FP_ENTER();
cpu_state.pc++;
if (fpu_type == FPU_8087)
{
cpu_state.npxc &= ~FPCW_DISI;
CLOCK_CYCLES(x87_timings.fdisi_eni);
}
else
CLOCK_CYCLES(x87_timings.fnop);
return 0;
}
static int opFSTSW_AX(uint32_t fetchdat)
{
FP_ENTER();