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Fix internal representation of fp80 to be the

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same as a normal i80 {low64, high16} rather
than its own {high64, low16}.  A depressing number
of places know about this; I think I got them all.
Bitcode readers and writers convert back to the old
form to avoid breaking compatibility.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67562 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen
2009-03-23 21:16:53 +00:00
parent ad20778705
commit 1b25cb2416
9 changed files with 97 additions and 27 deletions
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10
lib/Bitcode/Reader/BitcodeReader.cpp
View File

@@ -801,9 +801,13 @@ bool BitcodeReader::ParseConstants() {
V = ConstantFP::get(APFloat(APInt(32, (uint32_t)Record[0])));
else if (CurTy == Type::DoubleTy)
V = ConstantFP::get(APFloat(APInt(64, Record[0])));
else if (CurTy == Type::X86_FP80Ty)
V = ConstantFP::get(APFloat(APInt(80, 2, &Record[0])));
else if (CurTy == Type::FP128Ty)
else if (CurTy == Type::X86_FP80Ty) {
// Bits are not stored the same way as a normal i80 APInt, compensate.
uint64_t Rearrange[2];
Rearrange[0] = (Record[1] & 0xffffLL) | (Record[0] << 16);
Rearrange[1] = Record[0] >> 48;
V = ConstantFP::get(APFloat(APInt(80, 2, Rearrange)));
} else if (CurTy == Type::FP128Ty)
V = ConstantFP::get(APFloat(APInt(128, 2, &Record[0]), true));
else if (CurTy == Type::PPC_FP128Ty)
V = ConstantFP::get(APFloat(APInt(128, 2, &Record[0])));

5
lib/Bitcode/Writer/BitcodeWriter.cpp
View File

@@ -559,10 +559,11 @@ static void WriteConstants(unsigned FirstVal, unsigned LastVal,
Record.push_back(CFP->getValueAPF().bitcastToAPInt().getZExtValue());
} else if (Ty == Type::X86_FP80Ty) {
// api needed to prevent premature destruction
// bits are not in the same order as a normal i80 APInt, compensate.
APInt api = CFP->getValueAPF().bitcastToAPInt();
const uint64_t *p = api.getRawData();
Record.push_back(p[0]);
Record.push_back((uint16_t)p[1]);
Record.push_back((p[1] << 48) | (p[0] >> 16));
Record.push_back(p[0] & 0xffffLL);
} else if (Ty == Type::FP128Ty || Ty == Type::PPC_FP128Ty) {
APInt api = CFP->getValueAPF().bitcastToAPInt();
const uint64_t *p = api.getRawData();