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| author | Dan Gohman <gohman@apple.com> | 2011-12-17 00:04:22 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2011-12-17 00:04:22 +0000 |
| commit | 518cda42b9dc8b8acb382ae3f49141985f706459 (patch) | |
| tree | 58a5083e95eafbb678def679f707ecf7d4415ccf /llvm/lib/Bitcode | |
| parent | 27886c6c1efd95ddda693f2f77a301956505b11d (diff) | |
| download | llvm-518cda42b9dc8b8acb382ae3f49141985f706459.zip llvm-518cda42b9dc8b8acb382ae3f49141985f706459.tar.gz llvm-518cda42b9dc8b8acb382ae3f49141985f706459.tar.bz2 | |
The powers that be have decided that LLVM IR should now support 16-bit
"half precision" floating-point with a first-class type.
This patch adds basic IR support (but not codegen support).
llvm-svn: 146786
Diffstat (limited to 'llvm/lib/Bitcode')
| -rw-r--r-- | llvm/lib/Bitcode/Reader/BitcodeReader.cpp | 7 | ||||
| -rw-r--r-- | llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | 3 |
2 files changed, 8 insertions, 2 deletions
diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp index d584015..b86d6e0 100644 --- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp +++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp @@ -565,6 +565,9 @@ bool BitcodeReader::ParseTypeTableBody() { case bitc::TYPE_CODE_VOID: // VOID ResultTy = Type::getVoidTy(Context); break; + case bitc::TYPE_CODE_HALF: // HALF + ResultTy = Type::getHalfTy(Context); + break; case bitc::TYPE_CODE_FLOAT: // FLOAT ResultTy = Type::getFloatTy(Context); break; @@ -1032,7 +1035,9 @@ bool BitcodeReader::ParseConstants() { case bitc::CST_CODE_FLOAT: { // FLOAT: [fpval] if (Record.empty()) return Error("Invalid FLOAT record"); - if (CurTy->isFloatTy()) + if (CurTy->isHalfTy()) + V = ConstantFP::get(Context, APFloat(APInt(16, (uint16_t)Record[0]))); + else if (CurTy->isFloatTy()) V = ConstantFP::get(Context, APFloat(APInt(32, (uint32_t)Record[0]))); else if (CurTy->isDoubleTy()) V = ConstantFP::get(Context, APFloat(APInt(64, Record[0]))); diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp index d980163..f890786 100644 --- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp +++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp @@ -266,6 +266,7 @@ static void WriteTypeTable(const ValueEnumerator &VE, BitstreamWriter &Stream) { switch (T->getTypeID()) { default: llvm_unreachable("Unknown type!"); case Type::VoidTyID: Code = bitc::TYPE_CODE_VOID; break; + case Type::HalfTyID: Code = bitc::TYPE_CODE_HALF; break; case Type::FloatTyID: Code = bitc::TYPE_CODE_FLOAT; break; case Type::DoubleTyID: Code = bitc::TYPE_CODE_DOUBLE; break; case Type::X86_FP80TyID: Code = bitc::TYPE_CODE_X86_FP80; break; @@ -826,7 +827,7 @@ static void WriteConstants(unsigned FirstVal, unsigned LastVal, } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) { Code = bitc::CST_CODE_FLOAT; Type *Ty = CFP->getType(); - if (Ty->isFloatTy() || Ty->isDoubleTy()) { + if (Ty->isHalfTy() || Ty->isFloatTy() || Ty->isDoubleTy()) { Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue()); } else if (Ty->isX86_FP80Ty()) { // api needed to prevent premature destruction |