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convertFromInteger, as originally written, expected sign-extended

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input.  APInt unfortunately zero-extends signed integers, so Dale
modified the function to expect zero-extended input.  Make this
assumption explicit in the function name.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42732 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Neil Booth 2007-10-07 11:45:55 +00:00
parent 33d4c92e78
commit ccf596a53e
6 changed files with 14 additions and 12 deletions
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4
include/llvm/ADT/APFloat.h
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@ -194,8 +194,8 @@ namespace llvm {
opStatus convert(const fltSemantics &, roundingMode);
opStatus convertToInteger(integerPart *, unsigned int, bool,
roundingMode) const;
opStatus convertFromInteger(const integerPart *, unsigned int, bool,
roundingMode);
opStatus convertFromZeroExtendedInteger(const integerPart *, unsigned int,
bool, roundingMode);
opStatus convertFromString(const char *, roundingMode);
APInt convertToAPInt() const;
double convertToDouble() const;

4
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -3234,8 +3234,8 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
const uint64_t zero[] = {0, 0};
APFloat apf = APFloat(APInt(MVT::getSizeInBits(VT), 2, zero));
uint64_t x = 1ULL << ShiftAmt;
(void)apf.convertFromInteger(&x, MVT::getSizeInBits(NVT), false,
APFloat::rmNearestTiesToEven);
(void)apf.convertFromZeroExtendedInteger
(&x, MVT::getSizeInBits(NVT), false, APFloat::rmNearestTiesToEven);
Tmp2 = DAG.getConstantFP(apf, VT);
Tmp3 = DAG.getSetCC(TLI.getSetCCResultTy(),
Node->getOperand(0), Tmp2, ISD::SETLT);

2
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -1595,7 +1595,7 @@ SDOperand SelectionDAG::getNode(unsigned Opcode, MVT::ValueType VT,
case ISD::SINT_TO_FP: {
const uint64_t zero[] = {0, 0};
APFloat apf = APFloat(APInt(MVT::getSizeInBits(VT), 2, zero));
(void)apf.convertFromInteger(&Val,
(void)apf.convertFromZeroExtendedInteger(&Val,
MVT::getSizeInBits(Operand.getValueType()),
Opcode==ISD::SINT_TO_FP,
APFloat::rmNearestTiesToEven);

4
lib/ExecutionEngine/ExecutionEngine.cpp
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@ -396,7 +396,7 @@ GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
else if (CE->getType() == Type::X86_FP80Ty) {
const uint64_t zero[] = {0, 0};
APFloat apf = APFloat(APInt(80, 2, zero));
(void)apf.convertFromInteger(GV.IntVal.getRawData(),
(void)apf.convertFromZeroExtendedInteger(GV.IntVal.getRawData(),
GV.IntVal.getBitWidth(), false,
APFloat::rmNearestTiesToEven);
GV.IntVal = apf.convertToAPInt();
@ -412,7 +412,7 @@ GenericValue ExecutionEngine::getConstantValue(const Constant *C) {
else if (CE->getType() == Type::X86_FP80Ty) {
const uint64_t zero[] = { 0, 0};
APFloat apf = APFloat(APInt(80, 2, zero));
(void)apf.convertFromInteger(GV.IntVal.getRawData(),
(void)apf.convertFromZeroExtendedInteger(GV.IntVal.getRawData(),
GV.IntVal.getBitWidth(), true,
APFloat::rmNearestTiesToEven);
GV.IntVal = apf.convertToAPInt();

10
lib/Support/APFloat.cpp
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@ -1247,8 +1247,8 @@ APFloat::mod(const APFloat &rhs, roundingMode rounding_mode)
if (fs==opInvalidOp)
return fs;
fs = V.convertFromInteger(x, parts * integerPartWidth, true,
rmNearestTiesToEven);
fs = V.convertFromZeroExtendedInteger(x, parts * integerPartWidth, true,
rmNearestTiesToEven);
assert(fs==opOK); // should always work
fs = V.multiply(rhs, rounding_mode);
@ -1576,9 +1576,11 @@ APFloat::convertFromUnsignedInteger(integerPart *parts,
return normalize(rounding_mode, lost_fraction);
}
/* FIXME: should this just take a const APInt reference? */
APFloat::opStatus
APFloat::convertFromInteger(const integerPart *parts, unsigned int width,
bool isSigned, roundingMode rounding_mode)
APFloat::convertFromZeroExtendedInteger(const integerPart *parts,
unsigned int width, bool isSigned,
roundingMode rounding_mode)
{
unsigned int partCount = partCountForBits(width);
opStatus status;

2
lib/VMCore/ConstantFold.cpp
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@ -216,7 +216,7 @@ Constant *llvm::ConstantFoldCastInstruction(unsigned opc, const Constant *V,
uint32_t BitWidth = cast<IntegerType>(SrcTy)->getBitWidth();
APFloat apf = APFloat(APInt(DestTy->getPrimitiveSizeInBits(),
2, zero));
(void)apf.convertFromInteger(api.getRawData(), BitWidth,
(void)apf.convertFromZeroExtendedInteger(api.getRawData(), BitWidth,
opc==Instruction::SIToFP,
APFloat::rmNearestTiesToEven);
return ConstantFP::get(DestTy, apf);