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UserspaceEmulator: Implement FISUB_RM32

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This commit is contained in:
Andreas Kling 2020-11-14 15:34:19 +01:00
parent ca85ecc032
commit 677af891b4
1 changed files with 14 additions and 1 deletions
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15
DevTools/UserspaceEmulator/SoftCPU.cpp
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@ -1657,7 +1657,20 @@ void SoftCPU::FCMOVBE(const X86::Instruction& insn)
void SoftCPU::FICOMP_RM32(const X86::Instruction&) { TODO_INSN(); }
void SoftCPU::FCMOVU(const X86::Instruction&) { TODO_INSN(); }
void SoftCPU::FISUB_RM32(const X86::Instruction&) { TODO_INSN(); }
void SoftCPU::FISUB_RM32(const X86::Instruction& insn)
{
if (insn.modrm().is_register()) {
fpu_set(0, fpu_get(insn.modrm().register_index()) - fpu_get(0));
} else {
auto new_f32 = insn.modrm().read32(*this, insn);
// FIXME: Respect shadow values
auto f32 = bit_cast<float>(new_f32.value());
auto f64 = (double)f32;
fpu_set(0, fpu_get(0) - f64);
}
}
void SoftCPU::FISUBR_RM32(const X86::Instruction&) { TODO_INSN(); }
void SoftCPU::FUCOMPP(const X86::Instruction&) { TODO_INSN(); }
void SoftCPU::FIDIV_RM32(const X86::Instruction&) { TODO_INSN(); }