[Bug target/39228] [4.3/4.4 Regression] 387 optimised __builtin_isinf() gives incorrect result

[uros at gcc dot gnu dot org]

------- Comment #6 from uros at gcc dot gnu dot org  2009-02-19 12:44 -------
Subject: Bug 39228

Author: uros
Date: Thu Feb 19 12:44:40 2009
New Revision: 144295

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=144295
Log:
        PR target/39228
        * config/i386/i386.md (isinfxf2): Split from isinf<mode>2.
        (UNSPEC_FXAM_MEM): New unspec.
        (fxam<mode>2_i387_with_temp): New insn and split pattern.
        (isinf<mode>2): Use MODEF mode iterator.  Force operand[1] through
        memory using fxam<mode>2_i387_with_temp to remove excess precision.

testsuite/ChangeLog:

        PR target/39228
        * gcc.c-torture/execute/pr39228.c: New test.


Added:
    branches/gcc-4_3-branch/gcc/testsuite/gcc.c-torture/execute/pr39228.c
Modified:
    branches/gcc-4_3-branch/gcc/ChangeLog
    branches/gcc-4_3-branch/gcc/config/i386/i386.md
    branches/gcc-4_3-branch/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39228