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b42f8cad52
This patch optimizes strstr function for power >= 7 systems. Performance gain is obtained using aligned memory access and usage of cmpb instruction for quicker comparison. The average improvement of this optimization is ~40%. Tested on ppc64 and ppc64le. 2015-07-16 Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com> * sysdeps/powerpc/powerpc64/multiarch/Makefile: Add strstr(). * sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c: Likewise. * sysdeps/powerpc/powerpc64/power7/strstr.S: New File. * sysdeps/powerpc/powerpc64/multiarch/strstr-power7.S: New File. * sysdeps/powerpc/powerpc64/multiarch/strstr-ppc64.c: New File. * sysdeps/powerpc/powerpc64/multiarch/strstr.c: New File. |
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|---|---|---|
| .. | ||
| 970 | ||
| a2 | ||
| bits | ||
| cell | ||
| fpu | ||
| multiarch | ||
| power4 | ||
| power5 | ||
| power5+ | ||
| power6 | ||
| power6x | ||
| power7 | ||
| power8 | ||
| __longjmp-common.S | ||
| __longjmp.S | ||
| addmul_1.S | ||
| backtrace.c | ||
| bsd-_setjmp.S | ||
| bsd-setjmp.S | ||
| bzero.S | ||
| configure | ||
| configure.ac | ||
| crti.S | ||
| crtn.S | ||
| dl-dtprocnum.h | ||
| dl-irel.h | ||
| dl-machine.c | ||
| dl-machine.h | ||
| dl-trampoline.S | ||
| entry.h | ||
| ffsll.c | ||
| hp-timing.h | ||
| Implies | ||
| lshift.S | ||
| Makefile | ||
| memcpy.S | ||
| memset.S | ||
| mul_1.S | ||
| ppc-mcount.S | ||
| register-dump.h | ||
| rtld-memset.c | ||
| setjmp-common.S | ||
| setjmp.S | ||
| stackguard-macros.h | ||
| start.S | ||
| stpcpy.S | ||
| strchr.S | ||
| strcmp.S | ||
| strcpy.S | ||
| strcspn.S | ||
| strlen.S | ||
| strncmp.S | ||
| strpbrk.S | ||
| strspn.S | ||
| strtok_r.S | ||
| strtok.S | ||
| submul_1.S | ||
| sysdep.h | ||
| tls-macros.h | ||
| tst-audit.h | ||