From f737f66b63911549f2dc82a5b940cb219b6e661e Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Thu, 20 Aug 2015 13:57:22 -0700 Subject: Add i386 strcmp family multiarch functions --- sysdeps/i386/multiarch/strncase_l.c | 53 +++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 sysdeps/i386/multiarch/strncase_l.c (limited to 'sysdeps/i386/multiarch/strncase_l.c') diff --git a/sysdeps/i386/multiarch/strncase_l.c b/sysdeps/i386/multiarch/strncase_l.c new file mode 100644 index 0000000000..279b3ce007 --- /dev/null +++ b/sysdeps/i386/multiarch/strncase_l.c @@ -0,0 +1,53 @@ +/* Multiple versions of strncasecmp_l. + All versions must be listed in ifunc-impl-list.c. + 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 + . */ + +/* Define multiple versions only for the definition in lib. */ +#if IS_IN (libc) +/* Redefine strncasecmp_l so that the compiler won't complain about the type + mismatch with the IFUNC selector in strong_alias, below. */ +# undef strncasecmp_l +# define strncasecmp_l __redirect_strncasecmp_l +# include +# undef strncasecmp_l + +# include + +extern __typeof (__redirect_strncasecmp_l) __strncasecmp_l_i386 attribute_hidden; +extern __typeof (__redirect_strncasecmp_l) __strncasecmp_l_ssse3 attribute_hidden; +extern __typeof (__redirect_strncasecmp_l) __strncasecmp_l_sse4_2 attribute_hidden; + +/* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle + ifunc symbol properly. */ +extern __typeof (__redirect_strncasecmp_l) __strncasecmp_l; +extern void *strncasecmp_l_ifunc (void) __asm__ ("__strncasecmp_l"); + +void * +strncasecmp_l_ifunc (void) +{ + if (HAS_CPU_FEATURE (SSE4_2)) + return __strncasecmp_l_sse4_2; + else if (HAS_CPU_FEATURE (SSSE3)) + return __strncasecmp_l_ssse3; + + return __strncasecmp_l_i386; +} +__asm__ (".type __strncasecmp_l, %gnu_indirect_function"); + +weak_alias (__strncasecmp_l, strncasecmp_l) +#endif -- cgit 1.4.1