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Add support for letting the client choose different flavors of NaNs. Testcase to be

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added in clang.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72606 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mike Stump
2009-05-30 03:49:43 +00:00
parent 51b16f4737
commit c5ca713b80
2 changed files with 17 additions and 10 deletions
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18
lib/Support/APFloat.cpp
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@ -598,12 +598,18 @@ APFloat::copySignificand(const APFloat &rhs)
/* Make this number a NaN, with an arbitrary but deterministic value
for the significand. If double or longer, this is a signalling NaN,
which may not be ideal. */
which may not be ideal. If float, this is QNaN(0). */
void
APFloat::makeNaN(void)
APFloat::makeNaN(unsigned type)
{
category = fcNaN;
APInt::tcSet(significandParts(), ~0U, partCount());
// FIXME: Add double and long double support for QNaN(0).
if (semantics->precision == 24 && semantics->maxExponent == 127) {
type |= 0x7fc00000U;
type &= ~0x80000000U;
} else
type = ~0U;
APInt::tcSet(significandParts(), type, partCount());
}
APFloat &
@ -662,16 +668,16 @@ APFloat::APFloat(const fltSemantics &ourSemantics, integerPart value)
}
APFloat::APFloat(const fltSemantics &ourSemantics,
fltCategory ourCategory, bool negative)
fltCategory ourCategory, bool negative, unsigned type)
{
assertArithmeticOK(ourSemantics);
initialize(&ourSemantics);
category = ourCategory;
sign = negative;
if(category == fcNormal)
if (category == fcNormal)
category = fcZero;
else if (ourCategory == fcNaN)
makeNaN();
makeNaN(type);
}
APFloat::APFloat(const fltSemantics &ourSemantics, const char *text)