From ff3ca3743a00af749258cc242457b648d65a1537 Mon Sep 17 00:00:00 2001 From: Stefan Liebler Date: Tue, 18 Dec 2018 13:57:10 +0100 Subject: S390: Refactor strlen ifunc handling. The ifunc handling for strlen is adjusted in order to omit ifunc variants if those will never be used as the minimum architecture level already supports newer CPUs by default. Glibc internal calls will then also use the "newer" ifunc variant. ChangeLog: * sysdeps/s390/multiarch/Makefile (sysdep_routines): Remove strlen variants. * sysdeps/s390/Makefile (sysdep_routines): Add strlen variants. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Refactor ifunc handling for strlen. * sysdeps/s390/multiarch/strlen-c.c: Move to ... * sysdeps/s390/strlen-c.c: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/strlen-vx.S: Move to ... * sysdeps/s390/strlen-vx.S: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/strlen.c: Move to ... * sysdeps/s390/strlen.c: ... here and adjust ifunc handling. * sysdeps/s390/ifunc-strlen.h: New file. --- sysdeps/s390/strlen.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 sysdeps/s390/strlen.c (limited to 'sysdeps/s390/strlen.c') diff --git a/sysdeps/s390/strlen.c b/sysdeps/s390/strlen.c new file mode 100644 index 0000000000..6ba0fe86fe --- /dev/null +++ b/sysdeps/s390/strlen.c @@ -0,0 +1,40 @@ +/* Multiple versions of strlen. + 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 + . */ + +#include + +#if HAVE_STRLEN_IFUNC +# define strlen __redirect_strlen +# include +# include +# undef strlen + +# if HAVE_STRLEN_C +extern __typeof (__redirect_strlen) STRLEN_C attribute_hidden; +# endif + +# if HAVE_STRLEN_Z13 +extern __typeof (__redirect_strlen) STRLEN_Z13 attribute_hidden; +# endif + +s390_libc_ifunc_expr (__redirect_strlen, strlen, + (HAVE_STRLEN_Z13 && (hwcap & HWCAP_S390_VX)) + ? STRLEN_Z13 + : STRLEN_DEFAULT + ) +#endif -- cgit 1.4.1