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| author | Eli Friedman <eli.friedman@gmail.com> | 2011-10-07 23:40:49 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2011-10-07 23:40:49 +0000 |
| commit | 9eb6b4d91b83448ec818089754c74bbdcf7dfd7a (patch) | |
| tree | bc23b23e593554a3b01ef19bded7a7f71ff22db6 /lib/Support/APFloat.cpp | |
| parent | d2fdb4a28560688be5cbc5b2b0c305ec7207cbd0 (diff) | |
Fix APInt::operator*= so that it computes the correct result for large integers where there is unsigned overflow. Fix APFloat::toString so that it doesn't depend on the incorrect behavior in common cases (and computes the correct result in some rare cases). Fixes PR11086.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141441 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support/APFloat.cpp')
| -rw-r--r-- | lib/Support/APFloat.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Support/APFloat.cpp b/lib/Support/APFloat.cpp index b32dfeb956..5307829ed8 100644 --- a/lib/Support/APFloat.cpp +++ b/lib/Support/APFloat.cpp @@ -3455,7 +3455,7 @@ void APFloat::toString(SmallVectorImpl<char> &Str, // <= semantics->precision + e * 137 / 59 // (log_2(5) ~ 2.321928 < 2.322034 ~ 137/59) - unsigned precision = semantics->precision + 137 * texp / 59; + unsigned precision = semantics->precision + (137 * texp + 136) / 59; // Multiply significand by 5^e. // N * 5^0101 == N * 5^(1*1) * 5^(0*2) * 5^(1*4) * 5^(0*8) |