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914a4e0557
The ifunc handling for strcpy 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. Note: The fallback s390-32/s390-64 ifunc variants with mvst instruction are now moved to the unified strcpy-z900.S file which can be used for 31/64bit. The s390-32/s390-64 files multiarch/strcpy.c and strcpy.S are deleted. ChangeLog: * sysdeps/s390/multiarch/Makefile (sysdep_routines): Remove strcpy variants. * sysdeps/s390/Makefile (sysdep_routines): Add strcpy variants. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Refactor ifunc handling for strcpy. * sysdeps/s390/multiarch/strcpy-vx.S: Move to ... * sysdeps/s390/strcpy-vx.S: ... here and adjust ifunc handling. * sysdeps/s390/multiarch/strcpy.c: Move to ... * sysdeps/s390/strcpy.c: ... here and adjust ifunc handling. * sysdeps/s390/ifunc-strcpy.h: New file. * sysdeps/s390/s390-64/strcpy.S: Move to ... * sysdeps/s390/strcpy-z900.S: ... here and adjust to be usable for 31/64bit and ifunc handling. * sysdeps/s390/s390-32/multiarch/strcpy.c: Delete file. * sysdeps/s390/s390-64/multiarch/strcpy.c: Likewise. * sysdeps/s390/s390-32/strcpy.S: Likewise.
53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/* strcpy 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_STRCPY_IFUNC 1
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#else
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# define HAVE_STRCPY_IFUNC 0
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#endif
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#ifdef HAVE_S390_VX_ASM_SUPPORT
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# define HAVE_STRCPY_IFUNC_AND_VX_SUPPORT HAVE_STRCPY_IFUNC
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#else
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# define HAVE_STRCPY_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 STRCPY_DEFAULT STRCPY_Z13
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# define HAVE_STRCPY_Z900_G5 0
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# define HAVE_STRCPY_Z13 1
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#else
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# define STRCPY_DEFAULT STRCPY_Z900_G5
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# define HAVE_STRCPY_Z900_G5 1
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# define HAVE_STRCPY_Z13 HAVE_STRCPY_IFUNC_AND_VX_SUPPORT
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#endif
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#if HAVE_STRCPY_Z900_G5
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# define STRCPY_Z900_G5 __strcpy_default
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#else
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# define STRCPY_Z900_G5 NULL
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#endif
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#if HAVE_STRCPY_Z13
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# define STRCPY_Z13 __strcpy_vx
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#else
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# define STRCPY_Z13 NULL
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#endif
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