diff options
| author | uros <uros@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-10-26 17:54:50 +0000 |
|---|---|---|
| committer | uros <uros@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-10-26 17:54:50 +0000 |
| commit | 113702f604dd2b4c30118a51e410bd603223cfc8 (patch) | |
| tree | f77b722f6470dec4c6e4d13c1f5218250646f0c2 /libgcc | |
| parent | 8bd4cb0808e21b288e4c85baf090372f4fe25b17 (diff) | |
| download | gcc-113702f604dd2b4c30118a51e410bd603223cfc8.tar.gz | |
* config/i386/crtfastmath.c (set_fast_math): Use __builtin_ia32_fxsave.
Clear only fxsave.mxcsr_mask. Use saved mxcsr from fxsave structure
when appropriate. Correct structure element types.
* config/i386/t-crtfm (crtfastmath.o): Compile with -mfxsr, remove
-minline-all-stringops from compile flags.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@192855 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libgcc')
| -rw-r--r-- | libgcc/ChangeLog | 10 | ||||
| -rw-r--r-- | libgcc/config/i386/crtfastmath.c | 39 | ||||
| -rw-r--r-- | libgcc/config/i386/t-crtfm | 2 |
3 files changed, 32 insertions, 19 deletions
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog index 3f17f3f1769..3f073ab12eb 100644 --- a/libgcc/ChangeLog +++ b/libgcc/ChangeLog @@ -1,10 +1,18 @@ +2012-10-26 Uros Bizjak <ubizjak@gmail.com> + + * config/i386/crtfastmath.c (set_fast_math): Use __builtin_ia32_fxsave. + Clear only fxsave.mxcsr_mask. Use saved mxcsr from fxsave structure + when appropriate. Correct structure element types. + * config/i386/t-crtfm (crtfastmath.o): Compile with -mfxsr, remove + -minline-all-stringops from compile flags. + 2012-10-25 Ralf Corsépius <ralf.corsepius@rtems.org> * config.host (sparc64-*-rtems*): Remove sparc/t-elf. 2012-10-25 Ralf Corsépius <ralf.corsepius@rtems.org> - * config.host (sh*-*-rtems*): Add sh*-*-elf*'s extra_parts. + * config.host (sh*-*-rtems*): Add sh*-*-elf*'s extra_parts. 2012-10-25 Sebastian Huber <sebastian.huber@embedded-brains.de> diff --git a/libgcc/config/i386/crtfastmath.c b/libgcc/config/i386/crtfastmath.c index 7abe500e981..e923d8f4669 100644 --- a/libgcc/config/i386/crtfastmath.c +++ b/libgcc/config/i386/crtfastmath.c @@ -91,36 +91,41 @@ set_fast_math (void) return; #endif /* __sun__ && __svr4__ */ - mxcsr = __builtin_ia32_stmxcsr () | MXCSR_FTZ; - if (edx & bit_FXSAVE) { /* Check if DAZ is available. */ struct { - unsigned short int cwd; - unsigned short int swd; - unsigned short int twd; - unsigned short int fop; - long int fip; - long int fcs; - long int foo; - long int fos; - long int mxcsr; - long int mxcsr_mask; - long int st_space[32]; - long int xmm_space[32]; - long int padding[56]; + unsigned short cwd; + unsigned short swd; + unsigned short twd; + unsigned short fop; + unsigned int fip; + unsigned int fcs; + unsigned int foo; + unsigned int fos; + unsigned int mxcsr; + unsigned int mxcsr_mask; + unsigned int st_space[32]; + unsigned int xmm_space[32]; + unsigned int padding[56]; } __attribute__ ((aligned (16))) fxsave; - __builtin_memset (&fxsave, 0, sizeof (fxsave)); + /* This is necessary since some implementations of FXSAVE + do not modify reserved areas within the image. */ + fxsave.mxcsr_mask = 0; + + __builtin_ia32_fxsave (&fxsave); - asm volatile ("fxsave %0" : "=m" (fxsave) : "m" (fxsave)); + mxcsr = fxsave.mxcsr; if (fxsave.mxcsr_mask & MXCSR_DAZ) mxcsr |= MXCSR_DAZ; } + else + mxcsr = __builtin_ia32_stmxcsr (); + mxcsr |= MXCSR_FTZ; __builtin_ia32_ldmxcsr (mxcsr); } #else diff --git a/libgcc/config/i386/t-crtfm b/libgcc/config/i386/t-crtfm index 46ce70bbb21..b9da06bfd20 100644 --- a/libgcc/config/i386/t-crtfm +++ b/libgcc/config/i386/t-crtfm @@ -1,4 +1,4 @@ # This is an endfile, Use -minline-all-stringops to ensure # that __builtin_memset doesn't refer to the lib function memset(). crtfastmath.o: $(srcdir)/config/i386/crtfastmath.c - $(gcc_compile) -msse -minline-all-stringops -c $< + $(gcc_compile) -mfxsr -msse -c $< |