From fda2d6aca32ad6a4d546ab3a7dd708de78e18c3a Mon Sep 17 00:00:00 2001
From: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>
Date: Wed, 30 Jul 2014 05:49:36 -0500
Subject: [PATCH] PowerPC: multiarch strncmp for PowerPC64
commit 24c2c3b99699b7cb7cc3c251d9bd504b2cde6a45
Author: Adhemerval Zanella <azanella@linux.vnet.ibm.com>
Date: Fri Dec 13 14:48:48 2013 -0500
---
sysdeps/powerpc/powerpc64/multiarch/Makefile | 3 +-
.../powerpc/powerpc64/multiarch/ifunc-impl-list.c | 9 +++++
.../powerpc/powerpc64/multiarch/strncmp-power4.S | 38 ++++++++++++++++++++
.../powerpc/powerpc64/multiarch/strncmp-power7.S | 39 ++++++++++++++++++++
.../powerpc/powerpc64/multiarch/strncmp-ppc64.S | 41 ++++++++++++++++++++++
sysdeps/powerpc/powerpc64/multiarch/strncmp.c | 37 +++++++++++++++++++
6 files changed, 166 insertions(+), 1 deletion(-)
create mode 100644 sysdeps/powerpc/powerpc64/multiarch/strncmp-power4.S
create mode 100644 sysdeps/powerpc/powerpc64/multiarch/strncmp-power7.S
create mode 100644 sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S
create mode 100644 sysdeps/powerpc/powerpc64/multiarch/strncmp.c
diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
index 4dca756..22baf1c 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile
@@ -7,7 +7,8 @@ sysdep_routines += memcpy-power7 memcpy-a2 memcpy-power6 memcpy-cell \
memrchr-power7 memrchr-ppc64 rawmemchr-power7 \
rawmemchr-ppc64 strlen-power7 strlen-ppc64 strnlen-power7 \
strnlen-ppc64 strcasecmp-power7 strcasecmp_l-power7 \
- strncase-power7 strncase_l-power7
+ strncase-power7 strncase_l-power7 strncmp-power7 \
+ strncmp-power4 strncmp-ppc64
CFLAGS-strncase-power7.c += -mcpu=power7 -funroll-loops
CFLAGS-strncase_l-power7.c += -mcpu=power7 -funroll-loops
diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
index 4b8fb22..67f75a5 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
@@ -77,6 +77,15 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
__strlen_power7)
IFUNC_IMPL_ADD (array, i, strlen, 1,
__strlen_ppc))
+
+ /* Support sysdeps/powerpc/powerpc64/multiarch/strncmp.c. */
+ IFUNC_IMPL (i, name, strncmp,
+ IFUNC_IMPL_ADD (array, i, strncmp, hwcap & PPC_FEATURE_HAS_VSX,
+ __strncmp_power7)
+ IFUNC_IMPL_ADD (array, i, strncmp, hwcap & PPC_FEATURE_POWER4,
+ __strncmp_power4)
+ IFUNC_IMPL_ADD (array, i, strncmp, 1,
+ __strncmp_ppc))
#endif
/* Support sysdeps/powerpc/powerpc64/multiarch/memcmp.c. */
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncmp-power4.S b/sysdeps/powerpc/powerpc64/multiarch/strncmp-power4.S
new file mode 100644
index 0000000..62cebbc
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncmp-power4.S
@@ -0,0 +1,38 @@
+/* Copyright (C) 2013-2014 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 <sysdep.h>
+
+#undef EALIGN
+#define EALIGN(name,alignt,words) \
+ .section ".text"; \
+ ENTRY_2(__strncmp_power4) \
+ .align ALIGNARG(alignt); \
+ EALIGN_W_##words; \
+ BODY_LABEL(__strncmp_power4): \
+ cfi_startproc;
+
+#undef END
+#define END(name) \
+ cfi_endproc; \
+ TRACEBACK(__strncmp_power4) \
+ END_2(__strncmp_power4)
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+
+#include <sysdeps/powerpc/powerpc64/power4/strncmp.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncmp-power7.S b/sysdeps/powerpc/powerpc64/multiarch/strncmp-power7.S
new file mode 100644
index 0000000..b0d607a
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncmp-power7.S
@@ -0,0 +1,39 @@
+/* Copyright (C) 2013-2014 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 <sysdep.h>
+
+#undef EALIGN
+#define EALIGN(name,alignt,words) \
+ .section ".text"; \
+ ENTRY_2(__strncmp_power7) \
+ .align ALIGNARG(alignt); \
+ EALIGN_W_##words; \
+ BODY_LABEL(__strncmp_power7): \
+ cfi_startproc;
+
+#undef END
+#define END(name) \
+ cfi_endproc; \
+ TRACEBACK(__strncmp_power7) \
+ END_2(__strncmp_power7)
+
+
+#undef libc_hidden_builtin_def
+#define libc_hidden_builtin_def(name)
+
+#include <sysdeps/powerpc/powerpc64/power7/strncmp.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S b/sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S
new file mode 100644
index 0000000..25b7f26
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncmp-ppc64.S
@@ -0,0 +1,41 @@
+/* Copyright (C) 2013-2014 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 <sysdep.h>
+
+#if defined SHARED && !defined NOT_IN_libc
+#undef EALIGN
+#define EALIGN(name,alignt,words) \
+ .section ".text"; \
+ ENTRY_2(__strncmp_ppc) \
+ .align ALIGNARG(alignt); \
+ EALIGN_W_##words; \
+ BODY_LABEL(__strncmp_ppc): \
+ cfi_startproc;
+
+#undef END
+#define END(name) \
+ cfi_endproc; \
+ TRACEBACK(__strncmp_ppc) \
+ END_2(__strncmp_ppc)
+
+# undef libc_hidden_builtin_def
+# define libc_hidden_builtin_def(name) \
+ .globl __GI_strncmp; __GI_strncmp = __strncmp_ppc
+#endif
+
+#include <sysdeps/powerpc/powerpc64/strncmp.S>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/strncmp.c b/sysdeps/powerpc/powerpc64/multiarch/strncmp.c
new file mode 100644
index 0000000..9829d69
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/multiarch/strncmp.c
@@ -0,0 +1,37 @@
+/* Multiple versions of strncmp.
+ Copyright (C) 2013-2014 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/>. */
+
+/* Define multiple versions only for definition in libc. */
+#if defined SHARED && !defined NOT_IN_libc
+# include <string.h>
+# include <shlib-compat.h>
+# include "init-arch.h"
+
+extern __typeof (strncmp) __strncmp_ppc attribute_hidden;
+extern __typeof (strncmp) __strncmp_power4 attribute_hidden;
+extern __typeof (strncmp) __strncmp_power7 attribute_hidden;
+
+/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle
+ ifunc symbol properly. */
+libc_ifunc (strncmp,
+ (hwcap & PPC_FEATURE_HAS_VSX)
+ ? __strncmp_power7 :
+ (hwcap & PPC_FEATURE_POWER4)
+ ? __strncmp_power4
+ : __strncmp_ppc);
+#endif
--
1.8.3.1