[Bug target/30652] SSE expansion is missing for isinf() and other fpclassify functions

[ubizjak at gmail dot com]

------- Comment #3 from ubizjak at gmail dot com  2007-02-01 08:16 -------
(In reply to comment #2)
> The generic implementation, including for SSE, is 

I don't think we want to be too generic there. We should not implement proposed
transformations as part of fold_builtin_classify() [builtins.c] as this would
penalize soft-float targets too much. In this case, we would trade one call to
isinf() to calls to __unorddf2 and__ledf2 plus fabs() bit-manipulation. For
isnan(), we trade the call to isnan to the call to __unorddf2.

IMO, we still need optabs here...


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30652