i686: Implement IFUNC selectors in C

	* sysdeps/i386/i686/multiarch/Makefile (sysdep_routines): Add
	bcopy-ia32, bzero-ia32, rawmemchr-ia32 memchr-ia32,
	memcmp-ia32, memcpy-ia32, memmove-ia32, mempcpy-ia32,
	memset-ia32, strcat-ia32, strchr-ia32, strrchr-ia32,
	strcpy-ia32, strcmp-ia32, strcspn-ia32, strpbrk-ia32,
	strspn-ia32, strlen-ia32, stpcpy-ia32, stpncpy-ia32,
	memcpy_chk-nonshared, mempcpy_chk-nonshared,
	memmove_chk-nonshared and memset_chk-nonshared
	* sysdeps/i386/i686/multiarch/bcopy-ia32.S: New file.
	* sysdeps/i386/i686/multiarch/bcopy.c: Likewise.
	* sysdeps/i386/i686/multiarch/bzero-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/bzero.c: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-memmove.h: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-memset.h: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-sse2-bsf.h: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-sse2-ssse3.h: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-sse2.h: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-sse4_2.h: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-ssse3-sse4_2.h: Likewise.
	* sysdeps/i386/i686/multiarch/memchr-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/memchr.c: Likewise.
	* sysdeps/i386/i686/multiarch/memcmp-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcmp.c: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy_chk-nonshared.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy_chk.c: Likewise.
	* sysdeps/i386/i686/multiarch/memmove-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/memmove.c: Likewise.
	* sysdeps/i386/i686/multiarch/memmove_chk-nonshared.S: Likewise.
	* sysdeps/i386/i686/multiarch/memmove_chk.c: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy_chk-nonshared.S: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy_chk.c: Likewise.
	* sysdeps/i386/i686/multiarch/memrchr.c: Likewise.
	* sysdeps/i386/i686/multiarch/memset-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/memset.c: Likewise.
	* sysdeps/i386/i686/multiarch/memset_chk-nonshared.S: Likewise.
	* sysdeps/i386/i686/multiarch/rawmemchr-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/rawmemchr.c: Likewise.
	* sysdeps/i386/i686/multiarch/stpcpy-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/stpcpy-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/stpcpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/stpncpy-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/stpncpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/strcasecmp.c: Likewise.
	* sysdeps/i386/i686/multiarch/strcasecmp_l.c: Likewise.
	* sysdeps/i386/i686/multiarch/strcat-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcat.c: Likewise.
	* sysdeps/i386/i686/multiarch/strchr-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strchr.c: Likewise.
	* sysdeps/i386/i686/multiarch/strcmp-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcmp.c: Likewise.
	* sysdeps/i386/i686/multiarch/strcpy-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/strcspn-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcspn.c: Likewise.
	* sysdeps/i386/i686/multiarch/strlen-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strlen.c: Likewise.
	* sysdeps/i386/i686/multiarch/strncase.c: Likewise.
	* sysdeps/i386/i686/multiarch/strncase_l.c: Likewise.
	* sysdeps/i386/i686/multiarch/strncat.c: Likewise.
	* sysdeps/i386/i686/multiarch/strncmp.c: Likewise.
	* sysdeps/i386/i686/multiarch/strncpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/strnlen.c: Likewise.
	* sysdeps/i386/i686/multiarch/strpbrk-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strpbrk.c: Likewise.
	* sysdeps/i386/i686/multiarch/strrchr-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strrchr.c: Likewise.
	* sysdeps/i386/i686/multiarch/strspn-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strspn.c: Likewise.
	* sysdeps/i386/i686/multiarch/wcschr.c: Likewise.
	* sysdeps/i386/i686/multiarch/wcscmp.c: Likewise.
	* sysdeps/i386/i686/multiarch/wcscpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/wcslen.c: Likewise.
	* sysdeps/i386/i686/multiarch/wcsrchr.c: Likewise.
	* sysdeps/i386/i686/multiarch/wmemcmp.c: Likewise.
	* sysdeps/i386/i686/multiarch/bcopy.S: Removed.
	* sysdeps/i386/i686/multiarch/bzero.S: Likewise.
	* sysdeps/i386/i686/multiarch/memchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy_chk.S: Likewise.
	* sysdeps/i386/i686/multiarch/memmove.S: Likewise.
	* sysdeps/i386/i686/multiarch/memmove_chk.S: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy_chk.S: Likewise.
	* sysdeps/i386/i686/multiarch/memrchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/memset.S: Likewise.
	* sysdeps/i386/i686/multiarch/memset_chk.S: Likewise.
	* sysdeps/i386/i686/multiarch/rawmemchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/stpcpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/stpncpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcasecmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcasecmp_l.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcat.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcspn.S: Likewise.
	* sysdeps/i386/i686/multiarch/strlen.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncase.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncase_l.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncat.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/strnlen.S: Likewise.
	* sysdeps/i386/i686/multiarch/strpbrk.S: Likewise.
	* sysdeps/i386/i686/multiarch/strrchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/strspn.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcschr.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcscmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcscpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcslen.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcsrchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/wmemcmp.S: Likewise.

1 files changed, 33 insertions, 0 deletions

diff --git a/sysdeps/i386/i686/multiarch/strcmp-ia32.S b/sysdeps/i386/i686/multiarch/strcmp-ia32.S
new file mode 100644
index 0000000000..2e87f19986
--- /dev/null
+++ b/sysdeps/i386/i686/multiarch/strcmp-ia32.S
@@ -0,0 +1,33 @@
+/* strcmp optimized for i686.
+   All versions must be listed in ifunc-impl-list.c.
+   Copyright (C) 2017 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 strcmp __strcmp_ia32
+
+# ifdef SHARED
+#  undef libc_hidden_builtin_def
+/* IFUNC doesn't work with the hidden functions in shared library since
+   they will be called without setting up EBX needed for PLT which is
+   used by IFUNC.  */
+#  define libc_hidden_builtin_def(name) \
+	.globl __GI_strcmp; __GI_strcmp = strcmp
+# endif
+#endif
+
+#include <sysdeps/i386/i686/strcmp.S>