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a55e2da270
This patch was based on the __memcmp_power8 and the recent __strlen_power10. Improvements from __memcmp_power8: 1. Don't need alignment code. On POWER10 lxvp and lxvl do not generate alignment interrupts, so they are safe for use on caching-inhibited memory. Notice that the comparison on the main loop will wait for both VSR to be ready. Therefore aligning one of the input address does not improve performance. In order to align both registers a vperm is necessary which add too much overhead. 2. Uses new POWER10 instructions This code uses lxvp to decrease contention on load by loading 32 bytes per instruction. The vextractbm is used to have a smaller tail code for calculating the return value. 3. Performance improvement This version has around 35% better performance on average. I saw no performance regressions for any length or alignment. Thanks Matheus for helping me out with some details. Co-authored-by: Matheus Castanho <msc@linux.ibm.com> Reviewed-by: Raphael M Zinsly <rzinsly@linux.ibm.com>
43 lines
1.9 KiB
Makefile
43 lines
1.9 KiB
Makefile
ifeq ($(subdir),string)
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sysdep_routines += memcpy-power8-cached memcpy-power7 memcpy-a2 memcpy-power6 \
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memcpy-cell memcpy-power4 memcpy-ppc64 \
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memcmp-power8 memcmp-power7 memcmp-power4 memcmp-ppc64 \
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memset-power7 memset-power6 memset-power4 \
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memset-ppc64 memset-power8 \
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mempcpy-power7 mempcpy-ppc64 \
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memchr-power8 memchr-power7 memchr-ppc64 \
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memrchr-power8 memrchr-power7 memrchr-ppc64 \
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rawmemchr-power7 rawmemchr-ppc64 \
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strlen-power7 strlen-ppc64 \
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strnlen-power8 strnlen-power7 strnlen-ppc64 \
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strcasecmp-power7 strcasecmp_l-power7 \
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strncase-power7 strncase_l-power7 \
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strncmp-power8 strncmp-power7 \
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strncmp-power4 strncmp-ppc64 \
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strchr-power8 strchr-power7 strchr-ppc64 \
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strchrnul-power8 strchrnul-power7 strchrnul-ppc64 \
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strcpy-power8 strcpy-power7 strcpy-ppc64 stpcpy-power8 \
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stpcpy-power7 stpcpy-ppc64 \
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strrchr-power8 strrchr-power7 strrchr-ppc64 \
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strncat-power8 strncat-power7 strncat-ppc64 \
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strncpy-power7 strncpy-ppc64 \
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stpncpy-power8 stpncpy-power7 stpncpy-ppc64 \
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strcmp-power8 strcmp-power7 strcmp-ppc64 \
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strcat-power8 strcat-power7 strcat-ppc64 \
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memmove-power7 memmove-ppc64 wordcopy-ppc64 bcopy-ppc64 \
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strncpy-power8 strstr-power7 strstr-ppc64 \
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strspn-power8 strspn-ppc64 strcspn-power8 strcspn-ppc64 \
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strlen-power8 strcasestr-power8 strcasestr-ppc64 \
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strcasecmp-ppc64 strcasecmp-power8 strncase-ppc64 \
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strncase-power8
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ifneq (,$(filter %le,$(config-machine)))
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sysdep_routines += memcmp-power10 memcpy-power10 memmove-power10 memset-power10 \
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rawmemchr-power9 rawmemchr-power10 \
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strcmp-power9 strncmp-power9 strcpy-power9 stpcpy-power9 \
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strlen-power9 strncpy-power9 stpncpy-power9 strlen-power10
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endif
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CFLAGS-strncase-power7.c += -mcpu=power7 -funroll-loops
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CFLAGS-strncase_l-power7.c += -mcpu=power7 -funroll-loops
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endif
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