S390: Refactor ifunc implementations and enable ifunc-test-framework.

On s390 all ifunc resolvers were implemented in multiarch/ifunc-resolve.c.
The resulting single object files has undefined references to all ifunc-functions.
This patch introduces one multiarch/<func>.c file for each of memcpy, memcmp
and memset with the function specific ifunc resolver. The different function
implementations are now implemented in multiarch/<func>-s390x.S
(moved from multiarch/<func>.S).

The new multiarch/ifunc-resolve.h file contains the ifunc-resolver macro
and other helper-macros. They are merged and are now used in common for
32/64bit. Therefore the __<func>_g5/__<func>_z900 functions were renamed to
__<func>_default.

This patch also enables testing the ifunc implementations by implementing
the function __libc_ifunc_impl_list. It uses the helper-macros of ifunc-resolve.h.

ChangeLog:

	* sysdeps/s390/s390-32/multiarch/Makefile (sysdep_routines):
	Remove ifunc-resolve, add memset-s390, memcpy-s390, memcmp-s390.
	* sysdeps/s390/s390-32/multiarch/ifunc-resolve.c: Delete File.
	* sysdeps/s390/s390-32/multiarch/memcmp.S: Move to ...
	* sysdeps/s390/s390-32/multiarch/memcmp-s390.S: ... here.
	(memcmp, bcmp): Use __memcmp_default as alias source.
	* sysdeps/s390/s390-32/multiarch/memcmp.c: New File.
	* sysdeps/s390/s390-32/memcmp.S (__memcmp_g5):
	Rename to __memcmp_default.
	* sysdeps/s390/s390-32/multiarch/memcpy.S: Move to ...
	* sysdeps/s390/s390-32/multiarch/memcpy-s390.S: ... here.
	(memcpy): Use __memcpy_default as alias source.
	* sysdeps/s390/s390-32/multiarch/memcpy.c: New File.
	* sysdeps/s390/s390-32/memcpy.S (__memcpy_g5):
	Rename to __memcpy_default.
	* sysdeps/s390/s390-32/multiarch/memset.S: Move to ...
	* sysdeps/s390/s390-32/multiarch/memset-s390.S: ... here.
	(memset): Use __memset_default as alias source.
	* sysdeps/s390/s390-32/multiarch/memset.c: New File.
	* sysdeps/s390/s390-32/memset.S (__memset_g5):
	Rename to __memset_default.
	* sysdeps/s390/s390-64/multiarch/Makefile (sysdep_routines):
	Remove ifunc-resolve, add memset-s390x, memcpy-s390x, memcmp-s390x.
	* sysdeps/s390/s390-64/multiarch/ifunc-resolve.c: Delete File.
	* sysdeps/s390/s390-64/multiarch/memcmp.S: Move to ...
	* sysdeps/s390/s390-64/multiarch/memcmp-s390x.S: ... here.
	(memcmp, bcmp): Use __memcmp_default as alias source.
	* sysdeps/s390/s390-64/multiarch/memcmp.c: New File.
	* sysdeps/s390/s390-64/memcmp.S (__memcmp_z900):
	Rename to __memcmp_default.
	* sysdeps/s390/s390-64/multiarch/memcpy.S: Move to ...
	* sysdeps/s390/s390-64/multiarch/memcpy-s390x.S: ... here.
	(memcpy): Use __memcpy_default as alias source.
	* sysdeps/s390/s390-64/multiarch/memcpy.c: New File.
	* sysdeps/s390/s390-64/memcpy.S (__memcpy_z900):
	Rename to __memcpy_default.
	* sysdeps/s390/s390-64/multiarch/memset.S: Move to ...
	* sysdeps/s390/s390-64/multiarch/memset-s390x.S: ... here.
	(memset): Use __memset_default as alias source.
	* sysdeps/s390/s390-64/multiarch/memset.c: New File.
	* sysdeps/s390/s390-64/memset.S (__memset_z900):
	Rename to __memset_default.
	* sysdeps/s390/multiarch/ifunc-resolve.h: New File.
	* sysdeps/s390/multiarch/ifunc-impl-list.c: New File.

1 files changed, 24 insertions, 0 deletions

diff --git a/sysdeps/s390/s390-64/multiarch/memcmp.c b/sysdeps/s390/s390-64/multiarch/memcmp.c
new file mode 100644
index 0000000000..a3607e4472
--- /dev/null
+++ b/sysdeps/s390/s390-64/multiarch/memcmp.c
@@ -0,0 +1,24 @@
+/* Multiple versions of memcmp.
+   Copyright (C) 2015 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)
+# include <ifunc-resolve.h>
+
+s390_libc_ifunc (memcmp)
+asm(".weak bcmp ; bcmp = memcmp");
+#endif