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Add a FIXME

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llvm-svn: 34828
This commit is contained in:
Reid Spencer 2007-03-02 02:01:34 +00:00
parent 1be4796f45
commit 39b817765b
1 changed files with 3 additions and 0 deletions
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lib/Support/APInt.cpp
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@ -1239,6 +1239,9 @@ APInt APInt::sqrt() const {
}
// Make sure we return the closest approximation
// FIXME: This still has an off-by-one error in it. Test case:
// 190 bits: sqrt(694114394047834196220892040454508646882614255319893124270) =
// 26346050824513229049493703285 (not 26346050824513229049493703284)
APInt square(x_old * x_old);
APInt nextSquare((x_old + 1) * (x_old +1));
if (this->ult(square))