| 1 | /* wcsnlen dispatch for RTLD and non-multiarch .c files |
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| 2 | Copyright (C) 2022-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | /* wcsnlen non-multiarch build is split into two files, |
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| 20 | wcsnlen-generic.c and wcsnlen.S. The wcsnlen.S build is for |
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| 21 | ISA level >= 2 uses the optimized assembly implementations in |
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| 22 | multiarch/wcsnlen*.S. This must be split into two files because |
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| 23 | we cannot include C code from assembly or vice versa. */ |
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| 24 | |
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| 25 | #include <isa-level.h> |
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| 26 | |
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| 27 | #if MINIMUM_X86_ISA_LEVEL >= 2 |
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| 28 | |
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| 29 | # define WCSNLEN __wcsnlen |
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| 30 | /* This symbol must stay linked to the name in wcslen.S. */ |
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| 31 | #if IS_IN (rtld) |
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| 32 | # define OVERFLOW_STRLEN __wcslen |
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| 33 | #else |
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| 34 | # define OVERFLOW_STRLEN HIDDEN_JUMPTARGET (__wcslen) |
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| 35 | #endif |
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| 36 | |
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| 37 | # define DEFAULT_IMPL_V2 "multiarch/wcsnlen-sse4_1.S" |
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| 38 | # define DEFAULT_IMPL_V3 "multiarch/wcsnlen-avx2.S" |
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| 39 | # define DEFAULT_IMPL_V4 "multiarch/wcsnlen-evex.S" |
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| 40 | |
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| 41 | /* isa-default-impl.h expects DEFAULT_IMPL_V1 to be defined but it |
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| 42 | should never be used from here. */ |
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| 43 | # define DEFAULT_IMPL_V1 "ERROR -- Invalid ISA IMPL" |
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| 44 | |
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| 45 | # include "isa-default-impl.h" |
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| 46 | |
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| 47 | weak_alias (__wcsnlen, wcsnlen) |
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| 48 | libc_hidden_def (__wcsnlen) |
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| 49 | #endif |
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| 50 | |
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