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| author | Chris Lattner <sabre@nondot.org> | 2008-01-29 07:00:44 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-01-29 07:00:44 +0000 |
| commit | 103e2d760f3fb81d426319389106a8aeb21a584d (patch) | |
| tree | 1a6075633e3e7b57b53b3eb329bf435a1f6b681f | |
| parent | 2454a2e0c3372a92439fc08bb651b995e3beb3eb (diff) | |
llvm.sqrt(-0.0) is defined.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46500 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | docs/LangRef.html | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html index a2ee339bc0..90ba0cc058 100644 --- a/docs/LangRef.html +++ b/docs/LangRef.html @@ -4677,7 +4677,9 @@ types however. The '<tt>llvm.sqrt</tt>' intrinsics return the sqrt of the specified operand, returning the same value as the libm '<tt>sqrt</tt>' functions would. Unlike <tt>sqrt</tt> in libm, however, <tt>llvm.sqrt</tt> has undefined behavior for -negative numbers (which allows for better optimization). +negative numbers other than -0.0 (which allows for better optimization, because +there is no need to worry about errno being set). <tt>llvm.sqrt(-0.0)</tt> is +defined to return -0.0 like IEEE sqrt. </p> <h5>Arguments:</h5> |