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[Bug target/30652] SSE expansion is missing for isinf() and other fpclassify functions
- From: "rth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 1 Feb 2007 00:28:23 -0000
- Subject: [Bug target/30652] SSE expansion is missing for isinf() and other fpclassify functions
- References: <bug-30652-1649@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from rth at gcc dot gnu dot org 2007-02-01 00:28 -------
The generic implementation, including for SSE, is
isgreater (abs(f), FLT_MAX)
For isfinite, use islessequal instead. For isnan, one can use
isunordered(f, f)
For isnormal, it'd be
isgreaterequal(abs(f), FLT_MIN) & islessequal(abs(f), FLT_MAX)
which is less likely to be friendly to inline.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30652