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From 2d5b6d3bb4813306ba5aa9ba03a56fe686bc6d4c Mon Sep 17 00:00:00 2001
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From: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>
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Date: Wed, 30 Jul 2014 05:05:19 -0500
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Subject: [PATCH] PowerPC: multirach memcmp for PowerPC64
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commit 07253fcf7b03535b26c81ee216d284ed7f1e250b
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Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
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Date: Fri Dec 13 14:32:31 2013 -0500
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---
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string/memcmp.c | 6 +++-
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sysdeps/powerpc/powerpc64/multiarch/Makefile | 3 +-
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.../powerpc/powerpc64/multiarch/ifunc-impl-list.c | 8 +++++
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.../powerpc/powerpc64/multiarch/memcmp-power4.S | 41 ++++++++++++++++++++++
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.../powerpc/powerpc64/multiarch/memcmp-power7.S | 41 ++++++++++++++++++++++
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sysdeps/powerpc/powerpc64/multiarch/memcmp-ppc64.c | 33 +++++++++++++++++
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sysdeps/powerpc/powerpc64/multiarch/memcmp.c | 39 ++++++++++++++++++++
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7 files changed, 169 insertions(+), 2 deletions(-)
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create mode 100644 sysdeps/powerpc/powerpc64/multiarch/memcmp-power4.S
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create mode 100644 sysdeps/powerpc/powerpc64/multiarch/memcmp-power7.S
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create mode 100644 sysdeps/powerpc/powerpc64/multiarch/memcmp-ppc64.c
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create mode 100644 sysdeps/powerpc/powerpc64/multiarch/memcmp.c
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diff --git a/string/memcmp.c b/string/memcmp.c
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index a73cc19..4a3ef58 100644
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--- a/string/memcmp.c
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+++ b/string/memcmp.c
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@@ -30,6 +30,10 @@
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#undef memcmp
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+#ifndef MEMCMP
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+# define MEMCMP memcmp
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+#endif
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+
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#ifdef _LIBC
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# include <memcopy.h>
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@@ -308,7 +312,7 @@ memcmp_not_common_alignment (srcp1, srcp2, len)
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}
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int
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-memcmp (s1, s2, len)
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+MEMCMP (s1, s2, len)
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const __ptr_t s1;
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const __ptr_t s2;
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size_t len;
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diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
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index 638c102..c0bc520 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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@@ -1,4 +1,5 @@
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ifeq ($(subdir),string)
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sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
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- memcpy-power4 memcpy-ppc64
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+ memcpy-power4 memcpy-ppc64 memcmp-power7 memcmp-power4 \
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+ memcmp-ppc64
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endif
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diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
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index 5090af4..295ebca 100644
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--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
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+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
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@@ -62,5 +62,13 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_ppc))
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#endif
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+ /* Support sysdeps/powerpc/powerpc64/multiarch/memcmp.c. */
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+ IFUNC_IMPL (i, name, memcmp,
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+ IFUNC_IMPL_ADD (array, i, memcmp, hwcap & PPC_FEATURE_HAS_VSX,
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+ __memcmp_power7)
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+ IFUNC_IMPL_ADD (array, i, memcmp, hwcap & PPC_FEATURE_POWER4,
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+ __memcmp_power4)
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+ IFUNC_IMPL_ADD (array, i, memcmp, 1, __memcmp_ppc))
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+
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return i;
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}
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diff --git a/sysdeps/powerpc/powerpc64/multiarch/memcmp-power4.S b/sysdeps/powerpc/powerpc64/multiarch/memcmp-power4.S
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new file mode 100644
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index 0000000..12db42c
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--- /dev/null
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+++ b/sysdeps/powerpc/powerpc64/multiarch/memcmp-power4.S
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@@ -0,0 +1,41 @@
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+/* Optimized memcmp implementation for PowerPC64/POWER4.
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+ Copyright (C) 2013-2014 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 <sysdep.h>
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+
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+#undef EALIGN
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+#define EALIGN(name, alignt, words) \
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+ .section ".text"; \
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+ ENTRY_2(__memcmp_power4) \
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+ .align ALIGNARG(alignt); \
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+ EALIGN_W_##words; \
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+ BODY_LABEL(__memcmp_power4): \
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+ cfi_startproc;
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+
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+#undef END
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+#define END(name) \
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+ cfi_endproc; \
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+ TRACEBACK(__memcmp_power4) \
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+ END_2(__memcmp_power4)
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+
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+#undef libc_hidden_builtin_def
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+#define libc_hidden_builtin_def(name)
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+#undef weak_alias
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+#define weak_alias(name,alias)
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+
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+#include <sysdeps/powerpc/powerpc64/power4/memcmp.S>
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diff --git a/sysdeps/powerpc/powerpc64/multiarch/memcmp-power7.S b/sysdeps/powerpc/powerpc64/multiarch/memcmp-power7.S
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new file mode 100644
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index 0000000..4898a88
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--- /dev/null
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+++ b/sysdeps/powerpc/powerpc64/multiarch/memcmp-power7.S
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@@ -0,0 +1,41 @@
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+/* Optimized memcmp implementation for PowerPC64/POWER7.
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+ Copyright (C) 2013-2014 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 <sysdep.h>
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+
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+#undef EALIGN
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+#define EALIGN(name, alignt, words) \
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+ .section ".text"; \
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+ ENTRY_2(__memcmp_power7) \
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+ .align ALIGNARG(alignt); \
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+ EALIGN_W_##words; \
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+ BODY_LABEL(__memcmp_power7): \
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+ cfi_startproc;
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+
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+#undef END
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+#define END(name) \
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+ cfi_endproc; \
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+ TRACEBACK(__memcmp_power7) \
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+ END_2(__memcmp_power7)
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+
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+#undef libc_hidden_builtin_def
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+#define libc_hidden_builtin_def(name)
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+#undef weak_alias
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+#define weak_alias(name,alias)
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+
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+#include <sysdeps/powerpc/powerpc64/power7/memcmp.S>
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diff --git a/sysdeps/powerpc/powerpc64/multiarch/memcmp-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/memcmp-ppc64.c
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new file mode 100644
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index 0000000..1a39d4a
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--- /dev/null
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+++ b/sysdeps/powerpc/powerpc64/multiarch/memcmp-ppc64.c
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@@ -0,0 +1,33 @@
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+/* Copyright (C) 2013-2014 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 MEMCMP __memcmp_ppc
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+#undef weak_alias
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+#define weak_alias(name, aliasname) \
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+ extern __typeof (__memcmp_ppc) aliasname \
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+ __attribute__ ((weak, alias ("__memcmp_ppc")));
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+#if !defined(NOT_IN_libc) && defined(SHARED)
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+# undef libc_hidden_builtin_def
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+# define libc_hidden_builtin_def(name) \
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+ __hidden_ver1(__memcmp_ppc, __GI_memcmp, __memcmp_ppc);
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+#endif
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+
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+extern __typeof (memcmp) __memcmp_ppc attribute_hidden;
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+
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+#include <string/memcmp.c>
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diff --git a/sysdeps/powerpc/powerpc64/multiarch/memcmp.c b/sysdeps/powerpc/powerpc64/multiarch/memcmp.c
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new file mode 100644
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index 0000000..af90f0a
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--- /dev/null
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+++ b/sysdeps/powerpc/powerpc64/multiarch/memcmp.c
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@@ -0,0 +1,39 @@
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+/* Multiple versions of memcmp. PowerPC64 version.
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+ Copyright (C) 2013-2014 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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+/* Define multiple versions only for definition in libc. */
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+#ifndef NOT_IN_libc
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+# include <string.h>
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+# include <shlib-compat.h>
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+# include "init-arch.h"
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+
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+extern __typeof (memcmp) __memcmp_ppc attribute_hidden;
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+extern __typeof (memcmp) __memcmp_power4 attribute_hidden;
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+extern __typeof (memcmp) __memcmp_power7 attribute_hidden;
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+
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+/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
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+ ifunc symbol properly. */
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+libc_ifunc (memcmp,
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+ (hwcap & PPC_FEATURE_HAS_VSX)
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+ ? __memcmp_power7 :
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+ (hwcap & PPC_FEATURE_POWER4)
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+ ? __memcmp_power4
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+ : __memcmp_ppc);
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+#else
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+#include <string/memcmp.c>
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+#endif
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--
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1.8.3.1
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