S390: Move utf16-utf32-z9.c to multiarch folder and use s390_libc_ifunc_expr macro.

The utf16-utf32-z9.c iconv module is using ifunc and thus the ifunc part should
be in multiarch folder.  Otherwise ifunc is used even if you configure
with --disable-multi-arch.

This patch moves the ifunc resolvers to the new file
sysdeps/s390/multiarch/utf16-utf32-z9.c. The resolvers are now implemented
with s390_libc_ifunc_expr macro instead of using gcc attribute ifunc directly.

The ifunc versions are implemented in sysdeps/s390/utf16-utf32-z9.c.
Each version is only implemented if needed or supported.  Therefore there is
a block at beginning of the file which selects the versions which should be
defined depending on support for multiarch, vector-support and used minimum
architecture level.  This block defines HAVE_[FROM|TO]_[C|VX] to 1 or 0.
The code below is rearranged and surrounded
by #if HAVE_[FROM|TO]_[C|VX] == 1.  There is no functional change.

ChangeLog:

	* sysdeps/s390/multiarch/utf16-utf32-z9.c: New File.
	* sysdeps/s390/utf16-utf32-z9.c: Move ifunc resolvers to multiarch
	folder and define ifunc versions depending on HAVE_[FROM|TO]_[C|VX].
	(HAVE_FROM_C, HAVE_FROM_VX, HAVE_TO_C, HAVE_TO_VX, FROM_LOOP_DEFAULT,
	FROM_LOOP_C, FROM_LOOP_VX, TO_LOOP_DEFAULT, TO_LOOP_C, TO_LOOP_VX):
	New Define.

1 files changed, 44 insertions, 0 deletions

diff --git a/sysdeps/s390/multiarch/utf16-utf32-z9.c b/sysdeps/s390/multiarch/utf16-utf32-z9.c
new file mode 100644
index 0000000..6e64169
--- /dev/null
+++ b/sysdeps/s390/multiarch/utf16-utf32-z9.c
@@ -0,0 +1,44 @@
+/* Conversion between UTF-16 and UTF-32 BE/internal - multiarch s390 version.
+
+   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/>.  */
+
+#include <sysdeps/s390/utf16-utf32-z9.c>
+#include <ifunc-resolve.h>
+
+#undef FROM_LOOP
+#define FROM_LOOP	__from_utf16_loop
+#undef TO_LOOP
+#define TO_LOOP		__to_utf16_loop
+
+#define _SINGLE_NAME(NAME) NAME##_single
+#define SINGLE_NAME(NAME) _SINGLE_NAME(NAME)
+strong_alias (SINGLE_NAME (FROM_LOOP_DEFAULT), SINGLE_NAME (FROM_LOOP))
+strong_alias (SINGLE_NAME (TO_LOOP_DEFAULT), SINGLE_NAME (TO_LOOP))
+
+/* Generate ifunc'ed loop functions for FROM/TO_LOOP.  */
+s390_libc_ifunc_expr (FROM_LOOP_DEFAULT, FROM_LOOP,
+		      (HAVE_FROM_VX && (hwcap & HWCAP_S390_VX))
+		      ? FROM_LOOP_VX
+		      : FROM_LOOP_DEFAULT);
+
+s390_libc_ifunc_expr (TO_LOOP_DEFAULT, TO_LOOP,
+		      (HAVE_TO_VX && (hwcap & HWCAP_S390_VX))
+		      ? TO_LOOP_VX
+		      : TO_LOOP_DEFAULT);
+
+#include <iconv/skeleton.c>