powerpc: Use generic wcschr optimization

This patch removes the power6 wcschr optimization and uses generic
implementation instead.  Currently, both power6 and power7 IFUNC variant
resulting binary are essentially the same and the generic implementation
with unrolling loop set to 8 also results in similar performance.

Checked on powerpc64-linux-gnu.

	* sysdeps/powerpc/Makefile [$(subdir) == wcsmbs] (CFLAGS-wcschr.c):
	New rule.
	* sysdeps/powerpc/power6/wcschr.c: Remove file.
	* sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-power6.c:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-power7.c:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-ppc32.c:
	Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/wcschr.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/wcschr-power6.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/wcschr-power7.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/wcschr-ppc64.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/wcschr.c: Likewise.
	* sysdeps/powerpc/powerpc64/power6/wcschr.c: Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
	[$(subdir) == wcsmbs] (sysdeps_routines): Remove wcschr-power6 and
	wcschr-power7.
	(CFLAGS-wcschr-power7.c, CFLAGS-wcschr-power6.c): Remove rule.
	* sysdeps/powerpc/powerpc64/multiarch/Makefile: Likewise.
	* sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c:
	Remove wcschr optimizations.
	* sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c: Likewise.

15 files changed, 3 insertions, 362 deletions

diff --git a/sysdeps/powerpc/Makefile b/sysdeps/powerpc/Makefile
index ba137e4cad..35cf1c624b 100644
--- a/sysdeps/powerpc/Makefile
+++ b/sysdeps/powerpc/Makefile
@@ -49,4 +49,5 @@ endif
 
 ifeq ($(subdir),wcsmbs)
 CFLAGS-wcscpy.c += -DUNROLL_NTIMES=8
+CFLAGS-wcschr.c += -DUNROLL_NTIMES=8
 endif
diff --git a/sysdeps/powerpc/power6/wcschr.c b/sysdeps/powerpc/power6/wcschr.c
deleted file mode 100644
index e3f93569dd..0000000000
--- a/sysdeps/powerpc/power6/wcschr.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/* wcschr.c - Wide Character Search for POWER6+.
-   Copyright (C) 2012-2019 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; see the file COPYING.LIB.  If
-   not, see <http://www.gnu.org/licenses/>.  */
-
-#include <wchar.h>
-
-#ifndef WCSCHR
-# define WCSCHR __wcschr
-# define DEFAULT_WCSCHR
-#endif
-
-/* Find the first occurrence of WC in WCS.  */
-wchar_t *
-WCSCHR (const wchar_t *wcs, const wchar_t wc)
-{
-  const wchar_t *wcs2 = wcs + 1;
-
-  if (*wcs == wc)
-    return (wchar_t *) wcs;
-  if (*wcs == L'\0')
-    return NULL;
-
-  do
-    {
-      wcs += 2;
-
-      if (*wcs2 == wc)
-        return (wchar_t *) wcs2;
-      if (*wcs2 == L'\0')
-        return NULL;
-       wcs2 += 2;
-
-      if (*wcs == wc)
-        return (wchar_t *) wcs;
-      if (*wcs == L'\0')
-        return NULL;
-      wcs += 2;
-
-      if (*wcs2 == wc)
-        return (wchar_t *) wcs2;
-      if (*wcs2 == L'\0')
-        return NULL;
-      wcs2 += 2;
-
-      if (*wcs == wc)
-        return (wchar_t *) wcs;
-      if (*wcs == L'\0')
-        return NULL;
-      wcs += 2;
-
-      if (*wcs2 == wc)
-        return (wchar_t *) wcs2;
-      if (*wcs2 == L'\0')
-        return NULL;
-      wcs2 += 2;
-
-      if (*wcs == wc)
-        return (wchar_t *) wcs;
-      if (*wcs == L'\0')
-        return NULL;
-      wcs += 2;
-
-      if (*wcs2 == wc)
-        return (wchar_t *) wcs2;
-      if (*wcs2 == L'\0')
-        return NULL;
-      wcs2 += 2;
-
-      if (*wcs == wc)
-        return (wchar_t *) wcs;
-    }
-  while (*wcs != L'\0');
-
-  return NULL;
-}
-#ifdef DEFAULT_WCSCHR
-libc_hidden_def (__wcschr)
-weak_alias (__wcschr, wcschr)
-libc_hidden_weak (wcschr)
-#else
-libc_hidden_def (wcschr)
-#endif
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
index f5141bc5b5..bb87c56b4d 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
@@ -17,11 +17,8 @@ CFLAGS-strncase_l-power7.c += -mcpu=power7 -funroll-loops
 endif
 
 ifeq ($(subdir),wcsmbs)
-sysdep_routines += wcschr-power7 wcschr-power6 wcschr-ppc32 \
-		   wcsrchr-power7 wcsrchr-power6 wcsrchr-ppc32
+sysdep_routines += wcsrchr-power7 wcsrchr-power6 wcsrchr-ppc32
 
-CFLAGS-wcschr-power7.c += -mcpu=power7
-CFLAGS-wcschr-power6.c += -mcpu=power6
 CFLAGS-wcsrchr-power7.c += -mcpu=power7
 CFLAGS-wcsrchr-power6.c += -mcpu=power6
 endif
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
index ae581d62f8..7624c3d5f0 100644
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
@@ -187,17 +187,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 	      IFUNC_IMPL_ADD (array, i, strchr, 1,
 			      __strchr_ppc))
 
-  /* Support sysdeps/powerpc/powerpc32/power4/multiarch/wcschr.c.  */
-  IFUNC_IMPL (i, name, wcschr,
-	      IFUNC_IMPL_ADD (array, i, wcschr,
-			      hwcap & PPC_FEATURE_HAS_VSX,
-			      __wcschr_power7)
-	      IFUNC_IMPL_ADD (array, i, wcschr,
-			      hwcap & PPC_FEATURE_ARCH_2_05,
-			      __wcschr_power6)
-	      IFUNC_IMPL_ADD (array, i, wcschr, 1,
-			      __wcschr_ppc))
-
   /* Support sysdeps/powerpc/powerpc32/power4/multiarch/wcsrchr.c.  */
   IFUNC_IMPL (i, name, wcsrchr,
 	      IFUNC_IMPL_ADD (array, i, wcsrchr,
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-power6.c b/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-power6.c
deleted file mode 100644
index 516f0f8584..0000000000
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-power6.c
+++ /dev/null
@@ -1,26 +0,0 @@
-/* wcschr.c - Wide Character Search for powerpc32/power6.
-   Copyright (C) 2013-2019 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; see the file COPYING.LIB.  If
-   not, see <http://www.gnu.org/licenses/>.  */
-
-#include <wchar.h>
-
-#define WCSCHR __wcschr_power6
-
-#undef libc_hidden_def
-#define libc_hidden_def(name)
-
-#include <sysdeps/powerpc/power6/wcschr.c>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-power7.c b/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-power7.c
deleted file mode 100644
index 5dc52659e8..0000000000
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-power7.c
+++ /dev/null
@@ -1,26 +0,0 @@
-/* wcschr.c - Wide Character Search for powerpc32/power7.
-   Copyright (C) 2013-2019 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; see the file COPYING.LIB.  If
-   not, see <http://www.gnu.org/licenses/>.  */
-
-#include <wchar.h>
-
-#define WCSCHR __wcschr_power7
-
-#undef libc_hidden_def
-#define libc_hidden_def(name)
-
-#include <sysdeps/powerpc/power6/wcschr.c>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-ppc32.c b/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-ppc32.c
deleted file mode 100644
index 55873fbcf4..0000000000
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-ppc32.c
+++ /dev/null
@@ -1,43 +0,0 @@
-/* Copyright (C) 2013-2019 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 <wchar.h>
-
-#if IS_IN (libc)
-# undef libc_hidden_weak
-# define libc_hidden_weak(name)
-
-# undef weak_alias
-# undef libc_hidden_def
-
-# ifdef SHARED
-#  define libc_hidden_def(name)  \
-    __hidden_ver1 (__wcschr_ppc, __GI_wcschr, __wcschr_ppc); \
-    strong_alias (__wcschr_ppc, __wcschr_ppc_1); \
-    __hidden_ver1 (__wcschr_ppc_1, __GI___wcschr, __wcschr_ppc_1);
-#  define weak_alias(name,alias)
-# else
-#  define weak_alias(name, alias) \
-    _weak_alias(__wcschr_ppc, __wcschr)
-#  define libc_hidden_def(name)
-# endif /* SHARED  */
-#endif
-
-extern __typeof (wcschr) __wcschr_ppc;
-
-#define WCSCHR  __wcschr_ppc
-#include <wcsmbs/wcschr.c>
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr.c b/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr.c
deleted file mode 100644
index c8379a2dca..0000000000
--- a/sysdeps/powerpc/powerpc32/power4/multiarch/wcschr.c
+++ /dev/null
@@ -1,41 +0,0 @@
-/* Multiple versions of wcschr
-   Copyright (C) 2013-2019 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/>.  */
-
-#if IS_IN (libc)
-# define wcschr __redirect_wcschr
-# include <wchar.h>
-# include <shlib-compat.h>
-# include "init-arch.h"
-
-extern __typeof (__redirect_wcschr) __wcschr_ppc attribute_hidden;
-extern __typeof (__redirect_wcschr) __wcschr_power6 attribute_hidden;
-extern __typeof (__redirect_wcschr) __wcschr_power7 attribute_hidden;
-
-extern __typeof (__redirect_wcschr) __libc_wcschr;
-
-libc_ifunc (__libc_wcschr,
-	     (hwcap & PPC_FEATURE_HAS_VSX)
-             ? __wcschr_power7 :
-	       (hwcap & PPC_FEATURE_ARCH_2_05)
-	       ? __wcschr_power6
-             : __wcschr_ppc);
-#undef wcschr
-weak_alias (__libc_wcschr, wcschr)
-#else
-#include <wcsmbs/wcschr.c>
-#endif
diff --git a/sysdeps/powerpc/powerpc64/multiarch/Makefile b/sysdeps/powerpc/powerpc64/multiarch/Makefile
index 3913ef580e..c70f4a2b5a 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/multiarch/Makefile
@@ -39,11 +39,8 @@ CFLAGS-strncase_l-power7.c += -mcpu=power7 -funroll-loops
 endif
 
 ifeq ($(subdir),wcsmbs)
-sysdep_routines += wcschr-power7 wcschr-power6 wcschr-ppc64 \
-		   wcsrchr-power7 wcsrchr-power6 wcsrchr-ppc64
+sysdep_routines += wcsrchr-power7 wcsrchr-power6 wcsrchr-ppc64
 
-CFLAGS-wcschr-power7.c += -mcpu=power7
-CFLAGS-wcschr-power6.c += -mcpu=power6
 CFLAGS-wcsrchr-power7.c += -mcpu=power7
 CFLAGS-wcsrchr-power6.c += -mcpu=power6
 endif
diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
index 06d33d71e0..9b1e4d141d 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
@@ -261,17 +261,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
 			      __strncasecmp_l_ppc))
 
   /* Support sysdeps/powerpc/powerpc64/multiarch/wcschr.c.  */
-  IFUNC_IMPL (i, name, wcschr,
-	      IFUNC_IMPL_ADD (array, i, wcschr,
-			      hwcap & PPC_FEATURE_HAS_VSX,
-			      __wcschr_power7)
-	      IFUNC_IMPL_ADD (array, i, wcschr,
-			      hwcap & PPC_FEATURE_ARCH_2_05,
-			      __wcschr_power6)
-	      IFUNC_IMPL_ADD (array, i, wcschr, 1,
-			      __wcschr_ppc))
-
-  /* Support sysdeps/powerpc/powerpc64/multiarch/wcschr.c.  */
   IFUNC_IMPL (i, name, wcsrchr,
 	      IFUNC_IMPL_ADD (array, i, wcsrchr,
 			      hwcap & PPC_FEATURE_HAS_VSX,
diff --git a/sysdeps/powerpc/powerpc64/multiarch/wcschr-power6.c b/sysdeps/powerpc/powerpc64/multiarch/wcschr-power6.c
deleted file mode 100644
index 029608c512..0000000000
--- a/sysdeps/powerpc/powerpc64/multiarch/wcschr-power6.c
+++ /dev/null
@@ -1,19 +0,0 @@
-/* wcschr.c - Wide Character Search for powerpc64/power6.
-   Copyright (C) 2013-2019 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; see the file COPYING.LIB.  If
-   not, see <http://www.gnu.org/licenses/>.  */
-
-#include <sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-power6.c>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/wcschr-power7.c b/sysdeps/powerpc/powerpc64/multiarch/wcschr-power7.c
deleted file mode 100644
index 9b11103976..0000000000
--- a/sysdeps/powerpc/powerpc64/multiarch/wcschr-power7.c
+++ /dev/null
@@ -1,19 +0,0 @@
-/* wcschr.c - Wide Character Search for powerpc64/power7.
-   Copyright (C) 2013-2019 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; see the file COPYING.LIB.  If
-   not, see <http://www.gnu.org/licenses/>.  */
-
-#include <sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-power7.c>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/wcschr-ppc64.c b/sysdeps/powerpc/powerpc64/multiarch/wcschr-ppc64.c
deleted file mode 100644
index f956fc0aa2..0000000000
--- a/sysdeps/powerpc/powerpc64/multiarch/wcschr-ppc64.c
+++ /dev/null
@@ -1,18 +0,0 @@
-/* Copyright (C) 2013-2019 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 <sysdeps/powerpc/powerpc32/power4/multiarch/wcschr-ppc32.c>
diff --git a/sysdeps/powerpc/powerpc64/multiarch/wcschr.c b/sysdeps/powerpc/powerpc64/multiarch/wcschr.c
deleted file mode 100644
index 0a279f0dd2..0000000000
--- a/sysdeps/powerpc/powerpc64/multiarch/wcschr.c
+++ /dev/null
@@ -1,43 +0,0 @@
-/* Multiple versions of wcschr
-   Copyright (C) 2013-2019 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/>.  */
-
-#if IS_IN (libc)
-# define wcschr __redirect_wcschr
-# define __wcschr __redirect___wcschr
-# include <wchar.h>
-# include <shlib-compat.h>
-# include "init-arch.h"
-
-extern __typeof (wcschr) __wcschr_ppc attribute_hidden;
-extern __typeof (wcschr) __wcschr_power6 attribute_hidden;
-extern __typeof (wcschr) __wcschr_power7 attribute_hidden;
-# undef wcschr
-# undef __wcschr
-
-libc_ifunc_redirected (__redirect___wcschr, __wcschr,
-		       (hwcap & PPC_FEATURE_HAS_VSX)
-		       ? __wcschr_power7
-		       : (hwcap & PPC_FEATURE_ARCH_2_05)
-			 ? __wcschr_power6
-			 : __wcschr_ppc);
-weak_alias (__wcschr, wcschr)
-#else
-#undef libc_hidden_def
-#define libc_hidden_def(a)
-#include <wcsmbs/wcschr.c>
-#endif
diff --git a/sysdeps/powerpc/powerpc64/power6/wcschr.c b/sysdeps/powerpc/powerpc64/power6/wcschr.c
deleted file mode 100644
index ae04a130cc..0000000000
--- a/sysdeps/powerpc/powerpc64/power6/wcschr.c
+++ /dev/null
@@ -1 +0,0 @@
-#include <sysdeps/powerpc/power6/wcschr.c>