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authorLiubov Dmitrieva <liubov.dmitrieva@gmail.com>2011-10-15 11:10:08 -0400
committerUlrich Drepper <drepper@gmail.com>2011-10-15 11:10:08 -0400
commitbe13f7bff66e1850f9057dd813d6e7be022d9516 (patch)
treed918a146db9072ad120f0010481c53d9b450c9a5 /wcsmbs
parent556a2007974ed39a68c87a8b5181f8057ecd0d6f (diff)
downloadglibc-be13f7bff66e1850f9057dd813d6e7be022d9516.tar.gz
Optimized memcmp and wmemcmp for x86-64 and x86-32
Diffstat (limited to 'wcsmbs')
-rw-r--r--wcsmbs/wmemcmp.c21
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;