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

["ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

Following testcase does not compile to inlined asm when -mfpmath=sse is used:

--cut here--
int test(double a)
{
        return isinf(a + 2.0);
}
--cut here--

gcc -O2 -msse3 -mfpmath=sse -fomit-frame-pointer:

test:
        movsd   .LC0, %xmm0
        addsd   4(%esp), %xmm0
        movsd   %xmm0, 4(%esp)
        jmp     isinf

An "isinf<mode>2" expander in config/i386/i386.md should be enhanced to expand
isinf() function to use SSE1/SSE2 FP bitops for -mfmpath=sse.


-- 
           Summary: SSE expansion is missing for isinf() and other
                    fpclassify functions
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ssemmx
          Severity: enhancement
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ubizjak at gmail dot com
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


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