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llvm.sqrt(-0.0) is defined.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46500 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2008-01-29 07:00:44 +00:00
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@ -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>