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8803f01e93
This changeset adds a baseline implementation of memcmp and bcmp for amd64. The same code is used for both functions with conditional code were the behaviour differs (we need more precise output for the memcmp case). FreeBSD documents that memcmp returns the difference between the mismatching characters. Slightly faster code would be possible could we relax this requirement to the ISO/IEC 9899:1999 requirement of merely returning a negative/positive integer or zero. Performance is better than bionic and glibc, except for long strings were the two are 13% faster. This could be because they use SSE4 ptest which we cannot use in a baseline kernel. Sponsored by: The FreeBSD Foundation Approved by: mjg Differential Revision: https://reviews.freebsd.org/D41442 |
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| .. | ||
| amd64_archlevel.c | ||
| bcmp.S | ||
| bcopy.c | ||
| bzero.c | ||
| Makefile.inc | ||
| memcmp.S | ||
| memcpy.S | ||
| memmove.S | ||
| memset.S | ||
| stpcpy.S | ||
| strcat.S | ||
| strchrnul.S | ||
| strcmp.S | ||
| strcpy.c | ||
| strlen.S | ||