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Honore the fixed bits of flags when pushing them to the stack, fixes #5093.

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OBattler
2025-05-17 21:02:06 +02:00
parent dc9101c00c
commit ddd271f6ee
3 changed files with 12 additions and 26 deletions
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4
src/codegen_new/codegen_ops_stack.c
View File

@@ -390,6 +390,8 @@ ropPUSHF(UNUSED(codeblock_t *block), ir_data_t *ir, UNUSED(uint8_t opcode), UNUS
uop_MOV_IMM(ir, IREG_oldpc, cpu_state.oldpc);
uop_CALL_FUNC(ir, flags_rebuild);
sp_reg = LOAD_SP_WITH_OFFSET(ir, -2);
uop_AND_IMM(ir, IREG_flags, IREG_flags, 0x7fd5);
uop_OR_IMM(ir, IREG_flags, IREG_flags, 0x0002);
uop_MEM_STORE_REG(ir, IREG_SS_base, sp_reg, IREG_flags);
SUB_SP(ir, 2);
@@ -406,6 +408,8 @@ ropPUSHFD(UNUSED(codeblock_t *block), ir_data_t *ir, UNUSED(uint8_t opcode), UNU
uop_MOV_IMM(ir, IREG_oldpc, cpu_state.oldpc);
uop_CALL_FUNC(ir, flags_rebuild);
uop_AND_IMM(ir, IREG_flags, IREG_flags, 0x7fd5);
uop_OR_IMM(ir, IREG_flags, IREG_flags, 0x0002);
if (cpu_CR4_mask & CR4_VME)
uop_AND_IMM(ir, IREG_temp0_W, IREG_eflags, 0x3c);
else if (CPUID)

15
src/cpu/x86_ops_flag.h
View File

@@ -121,6 +121,7 @@ opPUSHF(UNUSED(uint32_t fetchdat))
temp = (cpu_state.flags & ~I_FLAG) | 0x3000;
if (cpu_state.eflags & VIF_FLAG)
temp |= I_FLAG;
temp = (temp & 0x7fd5) | 2;
PUSH_W(temp);
} else {
x86gpf(NULL, 0);
@@ -128,6 +129,7 @@ opPUSHF(UNUSED(uint32_t fetchdat))
}
} else {
flags_rebuild();
cpu_state.flags = (cpu_state.flags & 0x7fd5) | 2;
PUSH_W(cpu_state.flags);
}
CLOCK_CYCLES(4);
@@ -149,6 +151,7 @@ opPUSHFD(UNUSED(uint32_t fetchdat))
else
tempw = cpu_state.eflags & 4;
flags_rebuild();
cpu_state.flags = (cpu_state.flags & 0x7fd5) | 2;
PUSH_L(cpu_state.flags | (tempw << 16));
CLOCK_CYCLES(4);
PREFETCH_RUN(4, 1, -1, 0, 0, 0, 1, 0);
@@ -160,23 +163,11 @@ opPOPF_186(UNUSED(uint32_t fetchdat))
{
uint16_t tempw;
if ((cpu_state.eflags & VM_FLAG) && (IOPL < 3)) {
x86gpf(NULL, 0);
return 1;
}
tempw = POP_W();
if (cpu_state.abrt)
return 1;
if (!(msw & 1))
cpu_state.flags = (cpu_state.flags & 0x7000) | (tempw & 0x0fd5) | 2;
else if (!(CPL))
cpu_state.flags = (tempw & 0x7fd5) | 2;
else if (IOPLp)
cpu_state.flags = (cpu_state.flags & 0x3000) | (tempw & 0x4fd5) | 2;
else
cpu_state.flags = (cpu_state.flags & 0x3200) | (tempw & 0x4dd5) | 2;
flags_extract();
#ifdef USE_DEBUG_REGS_486
rf_flag_no_clear = 1;

15
src/cpu/x86_ops_flag_2386.h
View File

@@ -121,6 +121,7 @@ opPUSHF(UNUSED(uint32_t fetchdat))
temp = (cpu_state.flags & ~I_FLAG) | 0x3000;
if (cpu_state.eflags & VIF_FLAG)
temp |= I_FLAG;
temp = (temp & 0x7fd5) | 2;
PUSH_W(temp);
} else {
x86gpf(NULL, 0);
@@ -128,6 +129,7 @@ opPUSHF(UNUSED(uint32_t fetchdat))
}
} else {
flags_rebuild();
cpu_state.flags = (cpu_state.flags & 0x7fd5) | 2;
PUSH_W(cpu_state.flags);
}
CLOCK_CYCLES(4);
@@ -149,6 +151,7 @@ opPUSHFD(UNUSED(uint32_t fetchdat))
else
tempw = cpu_state.eflags & 4;
flags_rebuild();
cpu_state.flags = (cpu_state.flags & 0x7fd5) | 2;
PUSH_L(cpu_state.flags | (tempw << 16));
CLOCK_CYCLES(4);
PREFETCH_RUN(4, 1, -1, 0, 0, 0, 1, 0);
@@ -160,23 +163,11 @@ opPOPF_186(UNUSED(uint32_t fetchdat))
{
uint16_t tempw;
if ((cpu_state.eflags & VM_FLAG) && (IOPL < 3)) {
x86gpf(NULL, 0);
return 1;
}
tempw = POP_W();
if (cpu_state.abrt)
return 1;
if (!(msw & 1))
cpu_state.flags = (cpu_state.flags & 0x7000) | (tempw & 0x0fd5) | 2;
else if (!(CPL))
cpu_state.flags = (tempw & 0x7fd5) | 2;
else if (IOPLp)
cpu_state.flags = (cpu_state.flags & 0x3000) | (tempw & 0x4fd5) | 2;
else
cpu_state.flags = (cpu_state.flags & 0x3200) | (tempw & 0x4dd5) | 2;
flags_extract();
rf_flag_no_clear = 1;