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glibc/sysdeps/i386/i686/multiarch/bcopy-sse2-unaligned.S

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i386: memcpy functions with SSE2 unaligned load/store These new memcpy functions are the 32-bit version of x86_64 SSE2 unaligned memcpy. Memcpy average performace benefit is 18% on Silvermont, other platforms also improved about 35%, benchmarked on Silvermont, Haswell, Ivy Bridge, Sandy Bridge and Westmere, performance results attached in https://sourceware.org/ml/libc-alpha/2014-07/msg00157.html * sysdeps/i386/i686/multiarch/bcopy-sse2-unaligned.S: New file. * sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S: Likewise. * sysdeps/i386/i686/multiarch/memmove-sse2-unaligned.S: Likewise. * sysdeps/i386/i686/multiarch/mempcpy-sse2-unaligned.S: Likewise. * sysdeps/i386/i686/multiarch/bcopy.S: Select the sse2_unaligned version if bit_Fast_Unaligned_Load is set. * sysdeps/i386/i686/multiarch/memcpy.S: Likewise. * sysdeps/i386/i686/multiarch/memcpy_chk.S: Likewise. * sysdeps/i386/i686/multiarch/memmove.S: Likewise. * sysdeps/i386/i686/multiarch/memmove_chk.S: Likewise. * sysdeps/i386/i686/multiarch/mempcpy.S: Likewise. * sysdeps/i386/i686/multiarch/mempcpy_chk.S: Likewise. * sysdeps/i386/i686/multiarch/Makefile (sysdep_routines): Add bcopy-sse2-unaligned, memcpy-sse2-unaligned, memmove-sse2-unaligned and mempcpy-sse2-unaligned. * sysdeps/i386/i686/multiarch/ifunc-impl-list.c (MAX_IFUNC): Set to 4. (__libc_ifunc_impl_list): Test __bcopy_sse2_unaligned, __memmove_chk_sse2_unaligned, __memmove_sse2_unaligned, __memcpy_chk_sse2_unaligned, __memcpy_sse2_unaligned, __mempcpy_chk_sse2_unaligned, and __mempcpy_sse2_unaligned.
2014-12-29 11:39:46 +00:00
#define USE_AS_MEMMOVE
#define USE_AS_BCOPY
#define MEMCPY __bcopy_sse2_unaligned
#include "memcpy-sse2-unaligned.S"
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