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UserspaceEmulator: Check the right flags in FCMOV

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Also make FCMOVNB do an actual CMOV and not a copy of FILD_m32
This commit is contained in:
Hendiadyoin1 2021-07-23 00:44:00 +02:00 • committed by Linus Groh
parent 8108aaca39
commit 5d2a4bd18d
1 changed files with 8 additions and 7 deletions
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15
Userland/DevTools/UserspaceEmulator/SoftFPU.cpp
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@ -437,19 +437,20 @@ void SoftFPU::FCMOVB(const X86::Instruction& insn)
}
void SoftFPU::FCMOVNB(const X86::Instruction& insn)
{
VERIFY(!insn.modrm().is_register());
auto m32int = (i32)insn.modrm().read32(m_cpu, insn).value();
// FIXME: Respect shadow values
fpu_push((long double)m32int);
VERIFY(insn.modrm().is_register());
if (!m_cpu.cf())
fpu_set(0, fpu_get(insn.modrm().rm()));
}
void SoftFPU::FCMOVBE(const X86::Instruction& insn)
{
if (m_cpu.cf() | m_cpu.zf())
VERIFY(insn.modrm().is_register());
if (m_cpu.cf() || m_cpu.zf())
fpu_set(0, fpu_get(insn.modrm().rm()));
}
void SoftFPU::FCMOVNBE(const X86::Instruction& insn)
{
if (!(m_cpu.cf() | m_cpu.zf()))
VERIFY(insn.modrm().is_register());
if (!(m_cpu.cf() || m_cpu.zf()))
fpu_set(0, fpu_get(insn.modrm().rm()));
}
@ -462,7 +463,7 @@ void SoftFPU::FCMOVU(const X86::Instruction& insn)
void SoftFPU::FCMOVNU(const X86::Instruction& insn)
{
VERIFY(insn.modrm().is_register());
if (m_cpu.pf())
if (!m_cpu.pf())
fpu_set(0, fpu_get((insn.modrm().reg_fpu())));
}