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79 lines
3.4 KiB

Backport of the addition of
sysdeps/powerpc/powerpc64/multiarch/strncat-power7.c
from the following:
commit 9f2f36e5a91c2ce6edba5415e176155eb1008ae1
Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date: Tue Dec 23 13:39:23 2014 -0500
powerpc: Optimized strncat for POWER7/PPC64
With 3eb38795dbbbd816 (Simplify strncat) the generic algorithms uses
strlen, strnlen, and memcpy. This is faster than POWER7 current
implementation, especially for unaligned strings (where POWER7 code
uses byte-byte operations).
This patch removes the assembly implementation and uses a multiarch
specialization based on default algorithm calling optimized POWER7
symbols.
ChangeLog:
2015-01-13 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
* sysdeps/powerpc/powerpc64/multiarch/strncat-power7.c: New file.
* sysdeps/powerpc/powerpc64/multiarch/strncat-power7.S: Remove file.
* sysdeps/powerpc/powerpc64/power7/strncat.S: Likewise.
plus the addition of strncat-power7 to
sysdeps/powerpc/powerpc64/multiarch/Makefile
diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
index 7ebfc7e..74ae710 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile
@@ -8,6 +8,7 @@ sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
stpcpy-power8 stpcpy-power7 stpcpy-ppc64 \
strcat-power8 strcat-power7 strcat-ppc64 \
strcpy-power8 strcpy-power7 strcpy-ppc64 \
+ strncat-power7 \
rawmemchr-ppc64 strlen-power7 strlen-ppc64 strnlen-power7 \
strnlen-ppc64 strcasecmp-power7 strcasecmp_l-power7 \
strncase-power7 strncase_l-power7 strncmp-power7 \
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncat-power7.c b/sysdeps/powerpc/powerpc64/multiarch/strncat-power7.c
new file mode 100644
index 0000000..39b1aeb
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncat-power7.c
@@ -0,0 +1,31 @@
+/* Copyright (C) 2015 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/ >. */
+
+#include <string.h>
+
+#define STRNCAT __strncat_power7
+
+extern __typeof (strncat) __strncat_power7 attribute_hidden;
+extern __typeof (strlen) __strlen_power7 attribute_hidden;
+extern __typeof (strnlen) __strnlen_power7 attribute_hidden;
+extern __typeof (memcpy) __memcpy_power7 attribute_hidden;
+
+#define strlen __strlen_power7
+#define __strnlen __strnlen_power7
+#define memcpy __memcpy_power7
+
+#include <string/strncat.c>