[Bug target/52479] New: SH Target: SH4A DFmode fsca tests failing

[olegendo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52479

             Bug #: 52479
           Summary: SH Target: SH4A DFmode fsca tests failing
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: olege...@gcc.gnu.org
                CC: kkoj...@gcc.gnu.org
            Target: sh4a-*-*


As of rev 184877 the following SH4A target tests are failing:

gcc.target/sh/sh4a-cos.c scan-assembler fsca
gcc.target/sh/sh4a-sin.c scan-assembler fsca
gcc.target/sh/sh4a-sincos.c scan-assembler-times fsca 1

These tests check whether the fsca instruction is used for DFmode standard sin
and cos functions when -ffast-math is specified. 

While using fsca for SFmode and -ffast-math makes sense, for DFmode I think the
results might be too imprecise.  I would like to propose to remove the DFmode
fsca code altogether.


Using built-in specs.
COLLECT_GCC=sh-elf-gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/sh-elf/4.8.0/lto-wrapper
Target: sh-elf
Configured with: ../gcc-trunk/configure --target=sh-elf --prefix=/usr/local
--enable-languages=c,c++ --enable-multilib --disable-libssp --disable-nls
--disable-werror --enable-lto --with-newlib --with-gnu-as --with-gnu-ld
--with-system-zlib
Thread model: single
gcc version 4.8.0 20120304 (experimental) (GCC)