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From fda2d6aca32ad6a4d546ab3a7dd708de78e18c3a 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 05:49:36 -0500
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Subject: [PATCH] PowerPC: multiarch strncmp for PowerPC64
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commit 24c2c3b99699b7cb7cc3c251d9bd504b2cde6a45
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Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
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Date: Fri Dec 13 14:48:48 2013 -0500
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---
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sysdeps/powerpc/powerpc64/multiarch/Makefile | 3 +-
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.../powerpc/powerpc64/multiarch/ifunc-impl-list.c | 9 +++++
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.../powerpc/powerpc64/multiarch/strncmp-power4.S | 38 ++++++++++++++++++++
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.../powerpc/powerpc64/multiarch/strncmp-power7.S | 39 ++++++++++++++++++++
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.../powerpc/powerpc64/multiarch/strncmp-ppc64.S | 41 ++++++++++++++++++++++
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sysdeps/powerpc/powerpc64/multiarch/strncmp.c | 37 +++++++++++++++++++
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6 files changed, 166 insertions(+), 1 deletion(-)
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create mode 100644 sysdeps/powerpc/powerpc64/multiarch/strncmp-power4.S
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create mode 100644 sysdeps/powerpc/powerpc64/multiarch/strncmp-power7.S
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create mode 100644 sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S
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create mode 100644 sysdeps/powerpc/powerpc64/multiarch/strncmp.c
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diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
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index 4dca756..22baf1c 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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@@ -7,7 +7,8 @@ sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
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memrchr-power7 memrchr-ppc64 rawmemchr-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
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+ strncase-power7 strncase_l-power7 strncmp-power7 \
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+ strncmp-power4 strncmp-ppc64
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CFLAGS-strncase-power7.c += -mcpu=power7 -funroll-loops
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CFLAGS-strncase_l-power7.c += -mcpu=power7 -funroll-loops
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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 4b8fb22..67f75a5 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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@@ -77,6 +77,15 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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__strlen_power7)
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IFUNC_IMPL_ADD (array, i, strlen, 1,
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__strlen_ppc))
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+
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+ /* Support sysdeps/powerpc/powerpc64/multiarch/strncmp.c. */
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+ IFUNC_IMPL (i, name, strncmp,
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+ IFUNC_IMPL_ADD (array, i, strncmp, hwcap & PPC_FEATURE_HAS_VSX,
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+ __strncmp_power7)
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+ IFUNC_IMPL_ADD (array, i, strncmp, hwcap & PPC_FEATURE_POWER4,
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+ __strncmp_power4)
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+ IFUNC_IMPL_ADD (array, i, strncmp, 1,
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+ __strncmp_ppc))
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#endif
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/* Support sysdeps/powerpc/powerpc64/multiarch/memcmp.c. */
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diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncmp-power4.S b/sysdeps/powerpc/powerpc64/multiarch/strncmp-power4.S
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new file mode 100644
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index 0000000..62cebbc
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--- /dev/null
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+++ b/sysdeps/powerpc/powerpc64/multiarch/strncmp-power4.S
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@@ -0,0 +1,38 @@
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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(__strncmp_power4) \
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+ .align ALIGNARG(alignt); \
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+ EALIGN_W_##words; \
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+ BODY_LABEL(__strncmp_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(__strncmp_power4) \
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+ END_2(__strncmp_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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+
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+#include <sysdeps/powerpc/powerpc64/power4/strncmp.S>
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diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncmp-power7.S b/sysdeps/powerpc/powerpc64/multiarch/strncmp-power7.S
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new file mode 100644
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index 0000000..b0d607a
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--- /dev/null
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+++ b/sysdeps/powerpc/powerpc64/multiarch/strncmp-power7.S
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@@ -0,0 +1,39 @@
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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(__strncmp_power7) \
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+ .align ALIGNARG(alignt); \
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+ EALIGN_W_##words; \
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+ BODY_LABEL(__strncmp_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(__strncmp_power7) \
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+ END_2(__strncmp_power7)
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+
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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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+
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+#include <sysdeps/powerpc/powerpc64/power7/strncmp.S>
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diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S b/sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S
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new file mode 100644
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index 0000000..25b7f26
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--- /dev/null
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+++ b/sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S
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@@ -0,0 +1,41 @@
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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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+#if defined SHARED && !defined NOT_IN_libc
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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(__strncmp_ppc) \
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+ .align ALIGNARG(alignt); \
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+ EALIGN_W_##words; \
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+ BODY_LABEL(__strncmp_ppc): \
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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(__strncmp_ppc) \
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+ END_2(__strncmp_ppc)
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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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+ .globl __GI_strncmp; __GI_strncmp = __strncmp_ppc
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+#endif
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+
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+#include <sysdeps/powerpc/powerpc64/strncmp.S>
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diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncmp.c b/sysdeps/powerpc/powerpc64/multiarch/strncmp.c
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new file mode 100644
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index 0000000..9829d69
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--- /dev/null
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+++ b/sysdeps/powerpc/powerpc64/multiarch/strncmp.c
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@@ -0,0 +1,37 @@
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+/* Multiple versions of strncmp.
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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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+#if defined SHARED && !defined 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 (strncmp) __strncmp_ppc attribute_hidden;
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+extern __typeof (strncmp) __strncmp_power4 attribute_hidden;
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+extern __typeof (strncmp) __strncmp_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 (strncmp,
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+ (hwcap & PPC_FEATURE_HAS_VSX)
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+ ? __strncmp_power7 :
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+ (hwcap & PPC_FEATURE_POWER4)
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+ ? __strncmp_power4
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+ : __strncmp_ppc);
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+#endif
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--
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1.8.3.1
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