On 12/07/14 10:07, Uros Bizjak wrote:
Hello!
Attached patch optimizes ix86_atomic_assign_expand_fenv by using
register form of "fnstsw %ax" instead of "fnstsw <mem>". This way a
memory RW cycle is removed for a temporary.
Hi Uros,
The patch you attached seems to be the hook implementation for alpha...
Kyrill
2014-07-12 Uros Bizjak <ubiz...@gmail.com>
* config/i386/i386-builtin-types.def: Add USHORT_FTYPE_VOID.
Remove VOID_FTYPE_PUSHORT.
* config/i386/i386.c (bdesc_special_args) <__builtin_ia32_fnstsw>:
Change code to USHORT_FTYPE_VOID.
(ix86_expand_special_args_builtin): Handle USHORT_FTYPE_VOID.
(ix86_expand_builtin): Remove IX86_BUILTIN_FNSTSW handling.
(ix86_atomic_assign_expand_fenv): Update for
__builtin_ia32_fnstsw changes.
* config/i386/i386.md (x86_fnstsw_1): Set length unconditionally to 2.
(fnstsw): Change operand 0 to nonimmediate operand.
Bootstrapped and regression tested on x86_64-linux-gnu {,-m32} and
committed to mainline SVN.
Uros.
