From 13efa86ece61bf84daca50cab30db1b0902fe2db Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Thu, 30 Jun 2016 07:57:07 -0700 Subject: Check Prefer_ERMS in memmove/memcpy/mempcpy/memset Although the Enhanced REP MOVSB/STOSB (ERMS) implementations of memmove, memcpy, mempcpy and memset aren't used by the current processors, this patch adds Prefer_ERMS check in memmove, memcpy, mempcpy and memset so that they can be used in the future. * sysdeps/x86/cpu-features.h (bit_arch_Prefer_ERMS): New. (index_arch_Prefer_ERMS): Likewise. * sysdeps/x86_64/multiarch/memcpy.S (__new_memcpy): Return __memcpy_erms for Prefer_ERMS. * sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S (__memmove_erms): Enabled for libc.a. * ysdeps/x86_64/multiarch/memmove.S (__libc_memmove): Return __memmove_erms or Prefer_ERMS. * sysdeps/x86_64/multiarch/mempcpy.S (__mempcpy): Return __mempcpy_erms for Prefer_ERMS. * sysdeps/x86_64/multiarch/memset.S (memset): Return __memset_erms for Prefer_ERMS. --- ChangeLog | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'ChangeLog') diff --git a/ChangeLog b/ChangeLog index 9131b1f889..082422866d 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,18 @@ +2016-06-30 H.J. Lu + + * sysdeps/x86/cpu-features.h (bit_arch_Prefer_ERMS): New. + (index_arch_Prefer_ERMS): Likewise. + * sysdeps/x86_64/multiarch/memcpy.S (__new_memcpy): Return + __memcpy_erms for Prefer_ERMS. + * sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S + (__memmove_erms): Enabled for libc.a. + * ysdeps/x86_64/multiarch/memmove.S (__libc_memmove): Return + __memmove_erms or Prefer_ERMS. + * sysdeps/x86_64/multiarch/mempcpy.S (__mempcpy): Return + __mempcpy_erms for Prefer_ERMS. + * sysdeps/x86_64/multiarch/memset.S (memset): Return + __memset_erms for Prefer_ERMS. + 2016-06-30 Andreas Schwab [BZ #20262] -- cgit v1.2.3