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