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33 lines
750 B
33 lines
750 B
#include "Endianness.h"
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#include "preprocessor/llvm_includes_start.h"
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#include <llvm/IR/IntrinsicInst.h>
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#include <llvm/Support/Host.h>
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#include "preprocessor/llvm_includes_end.h"
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#include "Type.h"
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namespace dev
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{
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namespace eth
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{
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namespace jit
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{
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llvm::Value* Endianness::bswapIfLE(llvm::IRBuilder<>& _builder, llvm::Value* _word)
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{
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if (llvm::sys::IsLittleEndianHost)
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{
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if (auto constant = llvm::dyn_cast<llvm::ConstantInt>(_word))
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return _builder.getInt(constant->getValue().byteSwap());
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// OPT: Cache func declaration?
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auto bswapFunc = llvm::Intrinsic::getDeclaration(_builder.GetInsertBlock()->getParent()->getParent(), llvm::Intrinsic::bswap, Type::Word);
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return _builder.CreateCall(bswapFunc, _word);
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}
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return _word;
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}
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}
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}
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}
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