diff options
Diffstat (limited to 'lib/Support/APFloat.cpp')
| -rw-r--r-- | lib/Support/APFloat.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Support/APFloat.cpp b/lib/Support/APFloat.cpp index b42a168bae..ed261a4194 100644 --- a/lib/Support/APFloat.cpp +++ b/lib/Support/APFloat.cpp @@ -1770,6 +1770,12 @@ APFloat::opStatus APFloat::roundToIntegral(roundingMode rounding_mode) { opStatus fs; assertArithmeticOK(*semantics); + // If the exponent is large enough, we know that this value is already + // integral, and the arithmetic below would potentially cause it to saturate + // to +/-Inf. Bail out early instead. + if (exponent+1 >= (int)semanticsPrecision(*semantics)) + return opOK; + // The algorithm here is quite simple: we add 2^(p-1), where p is the // precision of our format, and then subtract it back off again. The choice // of rounding modes for the addition/subtraction determines the rounding mode |