[cfe-commits] r72718 - /cfe/trunk/include/clang/AST/Builtins.def
clattner at apple.com
Tue Jun 2 10:52:50 PDT 2009
On Jun 2, 2009, at 10:45 AM, Eli Friedman wrote:
>>> URL: http://llvm.org/viewvc/llvm-project?rev=72718&view=rev
>>> Add builtin declarations for the variants of sin and cos.
>> Nice. I don't think sin/cos set errno though, unlike sqrt. Aren't
>> const functions?
> I don't think glibc sets it, but I don't know about other
> implementations; see
> http://opengroup.org/onlinepubs/007908775/xsh/sin.html .
Getting sin/cos set to be readnone at the codegen level is really
important for performance. How should we handle this on targets where
it is safe? On MacOS, none of the libm functions set errno, but with
glibc things are more complex.
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