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Support lifting x87 80-bit float constants #393

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merged 2 commits into from
Sep 26, 2023
Merged

Support lifting x87 80-bit float constants #393

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23a7908
Support lifting x87 80-bit float constants
tetsuo-cpp Sep 22, 2023
df43565
Merge branch 'patchable-ir-main' into alex/x86-80fp-constant
tetsuo-cpp Sep 26, 2023
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7 changes: 7 additions & 0 deletions lib/Lifters/ValueLifter.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -352,6 +352,13 @@ ValueLifterImpl::Lift(llvm::ArrayRef<uint8_t> data, llvm::Type *type,
return llvm::ConstantFP::get(type, val.bitsToDouble());
}

case llvm::Type::X86_FP80TyID: {
const auto size = static_cast<uint64_t>(dl.getTypeStoreSize(type));
auto val = ConsumeBytesAsInt(data, size);
const llvm::APFloat float_val(llvm::APFloat::x87DoubleExtended(), val);
return llvm::ConstantFP::get(type, float_val);
}

default:
LOG(FATAL) << "Cannot initialize constant of unhandled LLVM type "
<< remill::LLVMThingToString(type) << " at " << std::hex
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