| 1 | /* Multiple versions of memset. |
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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 | /* Define multiple versions only for definition in libc. */ |
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| 20 | #if defined SHARED && IS_IN (libc) |
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| 21 | /* Redefine memset so that the compiler won't complain about the type |
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| 22 | mismatch with the IFUNC selector in strong_alias, below. */ |
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| 23 | # undef memset |
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| 24 | # define memset __redirect_memset |
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| 25 | # include <string.h> |
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| 26 | # include <shlib-compat.h> |
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| 27 | # include "init-arch.h" |
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| 28 | |
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| 29 | extern __typeof (__redirect_memset) __libc_memset; |
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| 30 | |
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| 31 | extern __typeof (__redirect_memset) __memset_ppc attribute_hidden; |
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| 32 | extern __typeof (__redirect_memset) __memset_power4 attribute_hidden; |
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| 33 | extern __typeof (__redirect_memset) __memset_power6 attribute_hidden; |
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| 34 | extern __typeof (__redirect_memset) __memset_power7 attribute_hidden; |
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| 35 | extern __typeof (__redirect_memset) __memset_power8 attribute_hidden; |
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| 36 | # ifdef __LITTLE_ENDIAN__ |
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| 37 | extern __typeof (__redirect_memset) __memset_power10 attribute_hidden; |
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| 38 | # endif |
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| 39 | |
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| 40 | /* Avoid DWARF definition DIE on ifunc symbol so that GDB can handle |
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| 41 | ifunc symbol properly. */ |
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| 42 | libc_ifunc (__libc_memset, |
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| 43 | # ifdef __LITTLE_ENDIAN__ |
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| 44 | (hwcap2 & PPC_FEATURE2_ARCH_3_1 |
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| 45 | && hwcap2 & PPC_FEATURE2_HAS_ISEL |
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| 46 | && hwcap & PPC_FEATURE_HAS_VSX |
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| 47 | && GLRO(dl_cache_line_size) == 128) |
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| 48 | ? __memset_power10 : |
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| 49 | # endif |
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| 50 | (hwcap2 & PPC_FEATURE2_ARCH_2_07 |
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| 51 | && hwcap & PPC_FEATURE_HAS_ALTIVEC |
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| 52 | && GLRO(dl_cache_line_size) == 128) |
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| 53 | ? __memset_power8 : |
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| 54 | (hwcap & PPC_FEATURE_ARCH_2_06 |
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| 55 | && GLRO(dl_cache_line_size) == 128) |
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| 56 | ? __memset_power7 : |
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| 57 | (hwcap & PPC_FEATURE_ARCH_2_05 |
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| 58 | && GLRO(dl_cache_line_size) == 128) |
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| 59 | ? __memset_power6 : |
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| 60 | (hwcap & PPC_FEATURE_POWER4 |
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| 61 | && GLRO(dl_cache_line_size) == 128) |
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| 62 | ? __memset_power4 |
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| 63 | : __memset_ppc); |
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| 64 | |
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| 65 | #undef memset |
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| 66 | strong_alias (__libc_memset, memset); |
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| 67 | libc_hidden_ver (__libc_memset, memset); |
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| 68 | #endif |
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| 69 | |
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