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316b884219
The ifunc handling for strncmp 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 strncmp variants. * sysdeps/s390/Makefile (sysdep_routines): Add strncmp variants. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Refactor ifunc handling for strncmp. * sysdeps/s390/multiarch/strncmp-c.c: Move to ... * sysdeps/s390/strncmp-c.c: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/strncmp-vx.S: Move to ... * sysdeps/s390/strncmp-vx.S: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/strncmp.c: Move to ... * sysdeps/s390/strncmp.c: ... here and adjust ifunc handling. * sysdeps/s390/ifunc-strncmp.h: New file.
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/* strncmp variant information on S/390 version.
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Copyright (C) 2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#if defined USE_MULTIARCH && IS_IN (libc) \
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&& ! defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
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# define HAVE_STRNCMP_IFUNC 1
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#else
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# define HAVE_STRNCMP_IFUNC 0
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#endif
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#ifdef HAVE_S390_VX_ASM_SUPPORT
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# define HAVE_STRNCMP_IFUNC_AND_VX_SUPPORT HAVE_STRNCMP_IFUNC
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#else
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# define HAVE_STRNCMP_IFUNC_AND_VX_SUPPORT 0
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#endif
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#if defined HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT
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# define STRNCMP_DEFAULT STRNCMP_Z13
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# define HAVE_STRNCMP_C 0
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# define HAVE_STRNCMP_Z13 1
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#else
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# define STRNCMP_DEFAULT STRNCMP_C
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# define HAVE_STRNCMP_C 1
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# define HAVE_STRNCMP_Z13 HAVE_STRNCMP_IFUNC_AND_VX_SUPPORT
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#endif
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#if HAVE_STRNCMP_C
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# define STRNCMP_C __strncmp_c
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#else
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# define STRNCMP_C NULL
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#endif
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#if HAVE_STRNCMP_Z13
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# define STRNCMP_Z13 __strncmp_vx
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#else
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# define STRNCMP_Z13 NULL
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#endif
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