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authorWilco Dijkstra <wdijkstr@arm.com>2015-08-05 15:58:15 +0100
committerWilco Dijkstra <wdijkstr@arm.com>2015-08-05 16:24:04 +0100
commit05a910f7b420c2b831f35ba90e61c80f001c0606 (patch)
treeea10fa59974d0e2e3b5f43d490aca37bc2b787ad /string/string.h
parentf29ac72effae859140bb0d7fffdb1e6cef0ffed0 (diff)
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Improve performance of mempcpy by inlining and using memcpy. Enable
this for all targets except sparc which has an optimized mempcpy
implementation.
Diffstat (limited to 'string/string.h')
-rw-r--r--string/string.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/string/string.h b/string/string.h
index 54a4d39a53..3ab71038ee 100644
--- a/string/string.h
+++ b/string/string.h
@@ -636,6 +636,25 @@ extern char *basename (const char *__filename) __THROW __nonnull ((1));
 # endif
 #endif
 
+#if defined __USE_GNU && defined __OPTIMIZE__ \
+    && defined __extern_always_inline && __GNUC_PREREQ (3,2)
+# if !defined _FORCE_INLINES && !defined _HAVE_STRING_ARCH_mempcpy
+
+#undef mempcpy
+#undef __mempcpy
+#define mempcpy(dest, src, n) __mempcpy_inline (dest, src, n)
+#define __mempcpy(dest, src, n) __mempcpy_inline (dest, src, n)
+
+__extern_always_inline void *
+__mempcpy_inline (void *__restrict __dest,
+		  const void *__restrict __src, size_t __n)
+{
+  return (char *) memcpy (__dest, __src, __n) + __n;
+}
+
+# endif
+#endif
+
 __END_DECLS
 
 #endif /* string.h  */