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| author | Neil Booth <neil@daikokuya.co.uk> | 2007-10-13 03:34:08 +0000 |
|---|---|---|
| committer | Neil Booth <neil@daikokuya.co.uk> | 2007-10-13 03:34:08 +0000 |
| commit | c799fe9ed9ad1a713f516a037f7684287848ac2e (patch) | |
| tree | 8888ac339c412dc0e0865955cada7ea57933db86 /llvm/lib/Support/APFloat.cpp | |
| parent | f86204baf42d0170904e1bf0705365ba8ee401ca (diff) | |
| download | bcm5719-llvm-c799fe9ed9ad1a713f516a037f7684287848ac2e.tar.gz bcm5719-llvm-c799fe9ed9ad1a713f516a037f7684287848ac2e.zip | |
If the power of 5 is exact, and the reciprocal exact, the error is zero not one half-ulps. This prevents an infinite loop in rare cases.
llvm-svn: 42950
Diffstat (limited to 'llvm/lib/Support/APFloat.cpp')
| -rw-r--r-- | llvm/lib/Support/APFloat.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Support/APFloat.cpp b/llvm/lib/Support/APFloat.cpp index 65ec7857255..a4c1affb7a3 100644 --- a/llvm/lib/Support/APFloat.cpp +++ b/llvm/lib/Support/APFloat.cpp @@ -1947,7 +1947,7 @@ APFloat::roundSignificandWithExponent(const integerPart *decSigParts, excessPrecision = calcSemantics.precision; } /* Extra half-ulp lost in reciprocal of exponent. */ - powHUerr = 1 + powStatus != opOK; + powHUerr = (powStatus == opOK && calcLostFraction == lfExactlyZero) ? 0: 2; } /* Both multiplySignificand and divideSignificand return the |
