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The IBM 386/486 cpu's are based on modified Intel 386 designs and, as such, should behave like the them on the x86 flag ops.

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TC1995
2022-07-15 12:34:41 +02:00
parent 6b63feb6ac
commit b80fda4280
1 changed files with 2 additions and 2 deletions
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src/cpu/x86_ops_flag.h
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@@ -266,11 +266,11 @@ static int opPOPFD(uint32_t fetchdat)
else if (IOPLp) cpu_state.flags = (cpu_state.flags & 0x3000) | (templ & 0x4fd5) | 2;
else cpu_state.flags = (cpu_state.flags & 0x3200) | (templ & 0x4dd5) | 2;
templ &= (is486 || isibm486) ? 0x3c0000 : 0;
templ &= (is486) ? 0x3c0000 : 0;
templ |= ((cpu_state.eflags&3) << 16);
if (cpu_CR4_mask & CR4_VME) cpu_state.eflags = (templ >> 16) & 0x3f;
else if (CPUID) cpu_state.eflags = (templ >> 16) & 0x27;
else if (is486 || isibm486) cpu_state.eflags = (templ >> 16) & 7;
else if (is486) cpu_state.eflags = (templ >> 16) & 7;
else cpu_state.eflags = (templ >> 16) & 3;
flags_extract();