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| author | Dale Johannesen <dalej@apple.com> | 2009-08-12 18:04:11 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@apple.com> | 2009-08-12 18:04:11 +0000 |
| commit | 4e97a0f0cb1b1b266d2653e44eb31374f2685c2b (patch) | |
| tree | 5a77a984eca14f629e38f2a2cd972ba08557ad13 /lib/Support/APInt.cpp | |
| parent | a79eefd4f862af68dc9e77bed537581aa4f5f806 (diff) | |
| download | llvm-4e97a0f0cb1b1b266d2653e44eb31374f2685c2b.tar.gz llvm-4e97a0f0cb1b1b266d2653e44eb31374f2685c2b.tar.bz2 llvm-4e97a0f0cb1b1b266d2653e44eb31374f2685c2b.tar.xz | |
Add attempted idiotproofing comment per review.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78825 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support/APInt.cpp')
| -rw-r--r-- | lib/Support/APInt.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp index 6638fccfef..daf2244149 100644 --- a/lib/Support/APInt.cpp +++ b/lib/Support/APInt.cpp @@ -885,7 +885,7 @@ APInt llvm::APIntOps::RoundDoubleToAPInt(double Double, unsigned width) { return isNeg ? -Tmp : Tmp; } -/// RoundToDouble - This function convert this APInt to a double. +/// RoundToDouble - This function converts this APInt to a double. /// The layout for double is as following (IEEE Standard 754): /// -------------------------------------- /// | Sign Exponent Fraction Bias | @@ -895,6 +895,7 @@ APInt llvm::APIntOps::RoundDoubleToAPInt(double Double, unsigned width) { double APInt::roundToDouble(bool isSigned) const { // Handle the simple case where the value is contained in one uint64_t. + // It is wrong to optimize getWord(0) to VAL; there might be more than one word. if (isSingleWord() || getActiveBits() <= APINT_BITS_PER_WORD) { if (isSigned) { int64_t sext = (int64_t(getWord(0)) << (64-BitWidth)) >> (64-BitWidth); |