From: Ulrich Drepper <drepper@redhat.com>
Date: Fri, 3 Jul 2009 10:01:57 +0000 (-0700)
Subject: Align functions to 16-byte boundary.
X-Git-Tag: fedora/glibc-2.10.90-4~1^2~43
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d6485c981b2b5aa4eb7cedc1ed1508183cb686f8;p=thirdparty%2Fglibc.git

Align functions to 16-byte boundary.

Some of the new multi-arch string functions for x86-64 were
not aligned to 16 byte boundarie,s possibly creating unnecessary
cache line misses and delays.
---

diff --git a/ChangeLog b/ChangeLog
index 53fcf2a1f85..8b02c0cba52 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2009-07-03  Ulrich Drepper  <drepper@redhat.com>
+
+	* sysdeps/x86_64/multiarch/strcmp.S: Make sure functions are all
+	aligned to 16 byte boundaries.
+	* sysdeps/x86_64/multiarch/strcpy.S: Likewise.
+	* sysdeps/x86_64/multiarch/strlen.S: Likewise.
+	* sysdeps/x86_64/multiarch/rawmemchr.S: Likewise.
+
 2009-07-02  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* config.h.in (HAVE_SSE4_SUPPORT): New macro.
diff --git a/sysdeps/x86_64/multiarch/rawmemchr.S b/sysdeps/x86_64/multiarch/rawmemchr.S
index 93ca6316334..d4f265f4300 100644
--- a/sysdeps/x86_64/multiarch/rawmemchr.S
+++ b/sysdeps/x86_64/multiarch/rawmemchr.S
@@ -77,6 +77,7 @@ __rawmemchr_sse42:
 # undef ENTRY
 # define ENTRY(name) \
 	.type __rawmemchr_sse2, @function; \
+	.align 16; \
 	__rawmemchr_sse2: cfi_startproc; \
 	CALL_MCOUNT
 # undef END
diff --git a/sysdeps/x86_64/multiarch/strcmp.S b/sysdeps/x86_64/multiarch/strcmp.S
index 2f4bf17d956..37985036aa1 100644
--- a/sysdeps/x86_64/multiarch/strcmp.S
+++ b/sysdeps/x86_64/multiarch/strcmp.S
@@ -1659,6 +1659,7 @@ LABEL(unaligned_table):
 # undef ENTRY
 # define ENTRY(name) \
 	.type STRCMP_SSE2, @function; \
+	.align 16; \
 	STRCMP_SSE2: cfi_startproc; \
 	CALL_MCOUNT
 # undef END
diff --git a/sysdeps/x86_64/multiarch/strcpy.S b/sysdeps/x86_64/multiarch/strcpy.S
index 9920b0ec74b..25cd01307df 100644
--- a/sysdeps/x86_64/multiarch/strcpy.S
+++ b/sysdeps/x86_64/multiarch/strcpy.S
@@ -1896,6 +1896,7 @@ LABEL(unaligned_table):
 # undef ENTRY
 # define ENTRY(name) \
 	.type STRCPY_SSE2, @function; \
+	.align 16; \
 	STRCPY_SSE2: cfi_startproc; \
 	CALL_MCOUNT
 # undef END
diff --git a/sysdeps/x86_64/multiarch/strlen.S b/sysdeps/x86_64/multiarch/strlen.S
index 79e6a977ecf..82b03ccc28c 100644
--- a/sysdeps/x86_64/multiarch/strlen.S
+++ b/sysdeps/x86_64/multiarch/strlen.S
@@ -77,6 +77,7 @@ __strlen_sse42:
 # undef ENTRY
 # define ENTRY(name) \
 	.type __strlen_sse2, @function; \
+	.align 16; \
 	__strlen_sse2: cfi_startproc; \
 	CALL_MCOUNT
 # undef END