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Add a "loses information" return value to APFloat::convert

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and APFloat::convertToInteger.  Restore return value to
IEEE754.  Adjust all users accordingly.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57329 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen
2008-10-09 23:00:39 +00:00
parent 7111b02c73
commit 23a98551ab
15 changed files with 115 additions and 55 deletions
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3
lib/Target/CBackend/CBackend.cpp
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@@ -832,12 +832,13 @@ void CWriter::printConstantVector(ConstantVector *CP, bool Static) {
// only deal in IEEE FP).
//
static bool isFPCSafeToPrint(const ConstantFP *CFP) {
bool ignored;
// Do long doubles in hex for now.
if (CFP->getType()!=Type::FloatTy && CFP->getType()!=Type::DoubleTy)
return false;
APFloat APF = APFloat(CFP->getValueAPF()); // copy
if (CFP->getType()==Type::FloatTy)
APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
#if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
char Buffer[100];
sprintf(Buffer, "%a", APF.convertToDouble());