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| author | Liubov Dmitrieva <liubov.dmitrieva@gmail.com> | 2011-10-15 11:10:08 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-15 11:10:08 -0400 |
| commit | be13f7bff66e1850f9057dd813d6e7be022d9516 (patch) | |
| tree | d918a146db9072ad120f0010481c53d9b450c9a5 /wcsmbs | |
| parent | 556a2007974ed39a68c87a8b5181f8057ecd0d6f (diff) | |
| download | glibc-be13f7bff66e1850f9057dd813d6e7be022d9516.tar.gz glibc-be13f7bff66e1850f9057dd813d6e7be022d9516.tar.xz glibc-be13f7bff66e1850f9057dd813d6e7be022d9516.zip | |
Optimized memcmp and wmemcmp for x86-64 and x86-32
Diffstat (limited to 'wcsmbs')
| -rw-r--r-- | wcsmbs/wmemcmp.c | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/wcsmbs/wmemcmp.c b/wcsmbs/wmemcmp.c index c6a321b89d..e7edc87164 100644 --- a/wcsmbs/wmemcmp.c +++ b/wcsmbs/wmemcmp.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1996, 1997 Free Software Foundation, Inc. +/* Copyright (C) 1996, 1997i, 2011 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996. @@ -19,9 +19,12 @@ #include <wchar.h> +#ifndef WMEMCMP +# define wmemcmp +#endif int -wmemcmp (s1, s2, n) +WMEMCMP (s1, s2, n) const wchar_t *s1; const wchar_t *s2; size_t n; @@ -34,19 +37,19 @@ wmemcmp (s1, s2, n) c1 = (wint_t) s1[0]; c2 = (wint_t) s2[0]; if (c1 - c2 != 0) - return c1 - c2; + return c1 > c2 ? 1 : -1; c1 = (wint_t) s1[1]; c2 = (wint_t) s2[1]; if (c1 - c2 != 0) - return c1 - c2; + return c1 > c2 ? 1 : -1; c1 = (wint_t) s1[2]; c2 = (wint_t) s2[2]; if (c1 - c2 != 0) - return c1 - c2; + return c1 > c2 ? 1 : -1; c1 = (wint_t) s1[3]; c2 = (wint_t) s2[3]; if (c1 - c2 != 0) - return c1 - c2; + return c1 > c2 ? 1 : -1; s1 += 4; s2 += 4; n -= 4; @@ -57,7 +60,7 @@ wmemcmp (s1, s2, n) c1 = (wint_t) s1[0]; c2 = (wint_t) s2[0]; if (c1 - c2 != 0) - return c1 - c2; + return c1 > c2 ? 1 : -1; ++s1; ++s2; --n; @@ -67,7 +70,7 @@ wmemcmp (s1, s2, n) c1 = (wint_t) s1[0]; c2 = (wint_t) s2[0]; if (c1 - c2 != 0) - return c1 - c2; + return c1 > c2 ? 1 : -1; ++s1; ++s2; --n; @@ -77,7 +80,7 @@ wmemcmp (s1, s2, n) c1 = (wint_t) s1[0]; c2 = (wint_t) s2[0]; if (c1 - c2 != 0) - return c1 - c2; + return c1 > c2 ? 1 : -1; } return 0; |