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UserspaceEmulator: Support FLDL2E / FLDPI, fix typos, use M_LN2 constant

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This commit is contained in:
Brendan Coles 2021-03-09 13:56:43 +00:00 • committed by Andreas Kling
parent 54bd2ee738
commit 0c46918b73
1 changed files with 16 additions and 9 deletions
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25
Userland/DevTools/UserspaceEmulator/SoftCPU.cpp
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@ -1504,7 +1504,7 @@ void SoftCPU::FDIV_RM32(const X86::Instruction& insn)
auto new_f32 = insn.modrm().read32(*this, insn);
// FIXME: Respect shadow values
auto f32 = bit_cast<float>(new_f32.value());
// FIXME: Raise IA on + infinity / +-infinitiy, +-0 / +-0, raise Z on finite / +-0
// FIXME: Raise IA on + infinity / +-infinity, +-0 / +-0, raise Z on finite / +-0
fpu_set(0, fpu_get(0) / f32);
}
}
@ -1517,7 +1517,7 @@ void SoftCPU::FDIVR_RM32(const X86::Instruction& insn)
auto new_f32 = insn.modrm().read32(*this, insn);
// FIXME: Respect shadow values
auto f32 = bit_cast<float>(new_f32.value());
// FIXME: Raise IA on + infinity / +-infinitiy, +-0 / +-0, raise Z on finite / +-0
// FIXME: Raise IA on + infinity / +-infinity, +-0 / +-0, raise Z on finite / +-0
fpu_set(0, f32 / fpu_get(0));
}
}
@ -1587,8 +1587,15 @@ void SoftCPU::FLDL2T(const X86::Instruction&)
fpu_push(log2f(10.0f));
}
void SoftCPU::FLDL2E(const X86::Instruction&) { TODO_INSN(); }
void SoftCPU::FLDPI(const X86::Instruction&) { TODO_INSN(); }
void SoftCPU::FLDL2E(const X86::Instruction&)
{
fpu_push(log2f(M_E));
}
void SoftCPU::FLDPI(const X86::Instruction&)
{
fpu_push(M_PI);
}
void SoftCPU::FLDLG2(const X86::Instruction&)
{
@ -1597,7 +1604,7 @@ void SoftCPU::FLDLG2(const X86::Instruction&)
void SoftCPU::FLDLN2(const X86::Instruction&)
{
fpu_push(logf(2.0f));
fpu_push(M_LN2);
}
void SoftCPU::FLDZ(const X86::Instruction&)
@ -1854,7 +1861,7 @@ void SoftCPU::FDIV_RM64(const X86::Instruction& insn)
auto new_f64 = insn.modrm().read64(*this, insn);
// FIXME: Respect shadow values
auto f64 = bit_cast<double>(new_f64.value());
// FIXME: Raise IA on + infinity / +-infinitiy, +-0 / +-0, raise Z on finite / +-0
// FIXME: Raise IA on + infinity / +-infinity, +-0 / +-0, raise Z on finite / +-0
fpu_set(0, fpu_get(0) / f64);
}
}
@ -1869,7 +1876,7 @@ void SoftCPU::FDIVR_RM64(const X86::Instruction& insn)
auto new_f64 = insn.modrm().read64(*this, insn);
// FIXME: Respect shadow values
auto f64 = bit_cast<double>(new_f64.value());
// FIXME: Raise IA on + infinity / +-infinitiy, +-0 / +-0, raise Z on finite / +-0
// FIXME: Raise IA on + infinity / +-infinity, +-0 / +-0, raise Z on finite / +-0
fpu_set(0, f64 / fpu_get(0));
}
}
@ -1984,7 +1991,7 @@ void SoftCPU::FIDIV_RM16(const X86::Instruction& insn)
void SoftCPU::FDIVRP(const X86::Instruction& insn)
{
VERIFY(insn.modrm().is_register());
// FIXME: Raise IA on + infinity / +-infinitiy, +-0 / +-0, raise Z on finite / +-0
// FIXME: Raise IA on + infinity / +-infinity, +-0 / +-0, raise Z on finite / +-0
fpu_set(insn.modrm().register_index(), fpu_get(0) / fpu_get(insn.modrm().register_index()));
fpu_pop();
}
@ -2001,7 +2008,7 @@ void SoftCPU::FIDIVR_RM16(const X86::Instruction& insn)
void SoftCPU::FDIVP(const X86::Instruction& insn)
{
VERIFY(insn.modrm().is_register());
// FIXME: Raise IA on + infinity / +-infinitiy, +-0 / +-0, raise Z on finite / +-0
// FIXME: Raise IA on + infinity / +-infinity, +-0 / +-0, raise Z on finite / +-0
fpu_set(insn.modrm().register_index(), fpu_get(insn.modrm().register_index()) / fpu_get(0));
fpu_pop();
}