| 1 | /* Enumerate available IFUNC implementations of a function. ARM version. |
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| 2 | Copyright (C) 2013-2024 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 | #include <stdbool.h> |
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| 20 | #include <string.h> |
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| 21 | #include <ldsodefs.h> |
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| 22 | #include <sysdep.h> |
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| 23 | #include <ifunc-impl-list.h> |
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| 24 | |
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| 25 | /* Fill ARRAY of MAX elements with IFUNC implementations for function |
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| 26 | NAME and return the number of valid entries. */ |
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| 27 | |
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| 28 | size_t |
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| 29 | __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, |
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| 30 | size_t max) |
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| 31 | { |
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| 32 | size_t i = max; |
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| 33 | |
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| 34 | bool use_neon = true; |
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| 35 | #ifdef __ARM_NEON__ |
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| 36 | # define __memcpy_neon memcpy |
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| 37 | # define __memchr_neon memchr |
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| 38 | #else |
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| 39 | use_neon = (GLRO(dl_hwcap) & HWCAP_ARM_NEON) != 0; |
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| 40 | #endif |
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| 41 | |
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| 42 | #ifndef __ARM_NEON__ |
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| 43 | bool use_vfp = true; |
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| 44 | # ifdef __SOFTFP__ |
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| 45 | use_vfp = (GLRO(dl_hwcap) & HWCAP_ARM_VFP) != 0; |
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| 46 | # endif |
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| 47 | #endif |
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| 48 | |
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| 49 | IFUNC_IMPL (i, name, memcpy, |
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| 50 | IFUNC_IMPL_ADD (array, i, memcpy, use_neon, __memcpy_neon) |
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| 51 | #ifndef __ARM_NEON__ |
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| 52 | IFUNC_IMPL_ADD (array, i, memcpy, use_vfp, __memcpy_vfp) |
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| 53 | #endif |
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| 54 | IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_arm)); |
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| 55 | |
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| 56 | IFUNC_IMPL (i, name, memchr, |
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| 57 | IFUNC_IMPL_ADD (array, i, memchr, use_neon, __memchr_neon) |
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| 58 | IFUNC_IMPL_ADD (array, i, memchr, 1, __memchr_noneon)); |
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| 59 | |
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| 60 | return 0; |
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| 61 | } |
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| 62 | |
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