[Bug target/69225] gcc uses double precision instead of single float with -m32 -std=c99 -msoft-float

[hjl at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69225

--- Comment #7 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Tue Jan 12 00:30:30 2016
New Revision: 232249

URL: https://gcc.gnu.org/viewcvs?rev=232249&root=gcc&view=rev
Log:
Set FLT_EVAL_METHOD to 2 only if 387 FPU is used

When 387 FPU isn't used, there is no excess precision.  We should set
FLT_EVAL_METHOD to 2 only if 387 FPU is used.

gcc/

        PR target/69225
        * config/i386/i386.h (TARGET_FLT_EVAL_METHOD): Set to 2 only if
        TARGET_80387 is true.

gcc/testsuite

        PR target/69225
        * gcc.target/i386/pr69225-1.c: New test.
        * gcc.target/i386/pr69225-2.c: Likewise.
        * gcc.target/i386/pr69225-3.c: Likewise.
        * gcc.target/i386/pr69225-4.c: Likewise.
        * gcc.target/i386/pr69225-5.c: Likewise.
        * gcc.target/i386/pr69225-6.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr69225-1.c
    trunk/gcc/testsuite/gcc.target/i386/pr69225-2.c
    trunk/gcc/testsuite/gcc.target/i386/pr69225-3.c
    trunk/gcc/testsuite/gcc.target/i386/pr69225-4.c
    trunk/gcc/testsuite/gcc.target/i386/pr69225-5.c
    trunk/gcc/testsuite/gcc.target/i386/pr69225-6.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.h
    trunk/gcc/testsuite/ChangeLog