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authorStefan Liebler <stli@linux.ibm.com>2018-12-18 13:57:22 +0100
committerStefan Liebler <stli@linux.ibm.com>2018-12-18 13:57:22 +0100
commitc09c1b6f014a45f6c4ba189f5ae94b1fb1a2982a (patch)
tree3830b2e009abdbd30ddcfa6968521b15a68d785d /sysdeps/s390/wcschrnul.c
parentcf3ccc31a3d76a9b4db410d3087055c3aff2b71b (diff)
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S390: Refactor wcschrnul ifunc handling.
The ifunc handling for wcschrnul is adjusted in order to omit ifunc
if the minimum architecture level already supports newer CPUs by default.
Unfortunately the c ifunc variant can't be omitted at all as it is used
by the z13 ifunc variant as fallback if the pointers are not 4-byte aligned.

ChangeLog:

	* sysdeps/s390/multiarch/Makefile
	(sysdep_routines): Remove wcschrnul variants.
	* sysdeps/s390/Makefile (sysdep_routines): Add wcschrnul variants.
	* sysdeps/s390/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Refactor ifunc handling for wcschrnul.
	* sysdeps/s390/multiarch/wcschrnul-c.c: Move to ...
	* sysdeps/s390/wcschrnul-c.c: ... here and adjust ifunc handling.
	* sysdeps/s390/multiarch/wcschrnul-vx.S: Move to ...
	* sysdeps/s390/wcschrnul-vx.S: ... here and adjust ifunc handling.
	* sysdeps/s390/multiarch/wcschrnul.c: Move to ...
	* sysdeps/s390/wcschrnul.c: ... here and adjust ifunc handling.
	* sysdeps/s390/ifunc-wcschrnul.h: New file.
Diffstat (limited to 'sysdeps/s390/wcschrnul.c')
-rw-r--r--sysdeps/s390/wcschrnul.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/sysdeps/s390/wcschrnul.c b/sysdeps/s390/wcschrnul.c
new file mode 100644
index 0000000000..ab5aaf0402
--- /dev/null
+++ b/sysdeps/s390/wcschrnul.c
@@ -0,0 +1,39 @@
+/* Multiple versions of wcschrnul.
+   Copyright (C) 2015-2018 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 <ifunc-wcschrnul.h>
+
+#if HAVE_WCSCHRNUL_IFUNC
+# include <wchar.h>
+# include <ifunc-resolve.h>
+
+# if HAVE_WCSCHRNUL_C
+extern __typeof (__wcschrnul) WCSCHRNUL_C attribute_hidden;
+# endif
+
+# if HAVE_WCSCHRNUL_Z13
+extern __typeof (__wcschrnul) WCSCHRNUL_Z13 attribute_hidden;
+# endif
+
+s390_libc_ifunc_expr (__wcschrnul, __wcschrnul,
+		      (HAVE_WCSCHRNUL_Z13 && (hwcap & HWCAP_S390_VX))
+		      ? WCSCHRNUL_Z13
+		      : WCSCHRNUL_DEFAULT
+		      )
+weak_alias (__wcschrnul, wcschrnul)
+#endif