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authorH.J. Lu <hjl.tools@gmail.com>2016-06-30 07:57:07 -0700
committerH.J. Lu <hjl.tools@gmail.com>2016-06-30 07:58:11 -0700
commit13efa86ece61bf84daca50cab30db1b0902fe2db (patch)
treee6ed4e21bb720ba21d069d61064a057be6f999db /posix/fork.c
parent73fb56a4d51fd4437e4cde6dd3c8077a610f88a8 (diff)
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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.
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