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| author | liuhongt <hongtao.liu@intel.com> | 2022-12-12 15:43:58 +0800 |
|---|---|---|
| committer | liuhongt <hongtao.liu@intel.com> | 2022-12-26 09:11:44 +0800 |
| commit | e54375d85d4aa5889869c2672158083b2106b623 (patch) | |
| tree | 5570081bb54818c753f2f39d2fd1c5ebc230c8be /gcc/config | |
| parent | bc38aee755ddd50496f9a1d517a9cdd86301967d (diff) | |
| download | gcc-e54375d85d4aa5889869c2672158083b2106b623.zip gcc-e54375d85d4aa5889869c2672158083b2106b623.tar.gz gcc-e54375d85d4aa5889869c2672158083b2106b623.tar.bz2 | |
x86: Add a new option -mdaz-ftz to enable FTZ and DAZ flags in MXCSR.
if (mdaz-ftz)
link crtfastmath.o
else if ((Ofast || ffast-math || funsafe-math-optimizations)
&& !shared && !mno-daz-ftz)
link crtfastmath.o
else
Don't link crtfastmath.o
gcc/ChangeLog:
PR target/55522
PR target/36821
* config/i386/gnu-user-common.h (GNU_USER_TARGET_MATHFILE_SPEC):
Link crtfastmath.o whenever -mdaz-ftz is specified. Don't link
crtfastmath.o when -share or -mno-daz-ftz is specified.
* config/i386/i386.opt (mdaz-ftz): New option.
* doc/invoke.texi (x86 options): Document mftz-daz.
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/i386/gnu-user-common.h | 2 | ||||
| -rw-r--r-- | gcc/config/i386/i386.opt | 4 |
2 files changed, 5 insertions, 1 deletions
diff --git a/gcc/config/i386/gnu-user-common.h b/gcc/config/i386/gnu-user-common.h index 9910cd6..f910524 100644 --- a/gcc/config/i386/gnu-user-common.h +++ b/gcc/config/i386/gnu-user-common.h @@ -47,7 +47,7 @@ along with GCC; see the file COPYING3. If not see /* Similar to standard GNU userspace, but adding -ffast-math support. */ #define GNU_USER_TARGET_MATHFILE_SPEC \ - "%{Ofast|ffast-math|funsafe-math-optimizations:%{!shared:crtfastmath.o%s}} \ + "%{mdaz-ftz:crtfastmath.o%s;Ofast|ffast-math|funsafe-math-optimizations:%{!shared:%{!mno-daz-ftz:crtfastmath.o%s}}} \ %{mpc32:crtprec32.o%s} \ %{mpc64:crtprec64.o%s} \ %{mpc80:crtprec80.o%s}" diff --git a/gcc/config/i386/i386.opt b/gcc/config/i386/i386.opt index fb4e57a..0b7df42 100644 --- a/gcc/config/i386/i386.opt +++ b/gcc/config/i386/i386.opt @@ -420,6 +420,10 @@ mpc80 Target RejectNegative Set 80387 floating-point precision to 80-bit. +mdaz-ftz +Target +Set the FTZ and DAZ Flags. + mpreferred-stack-boundary= Target RejectNegative Joined UInteger Var(ix86_preferred_stack_boundary_arg) Attempt to keep stack aligned to this power of 2. |