| 1 | /* memset -- set memory area to CH/0 |
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| 2 | Optimized version for x86-64. |
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| 3 | Copyright (C) 2002-2022 Free Software Foundation, Inc. |
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| 4 | This file is part of the GNU C Library. |
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| 5 | |
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| 6 | The GNU C Library is free software; you can redistribute it and/or |
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| 7 | modify it under the terms of the GNU Lesser General Public |
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| 8 | License as published by the Free Software Foundation; either |
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| 9 | version 2.1 of the License, or (at your option) any later version. |
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| 10 | |
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| 11 | The GNU C Library is distributed in the hope that it will be useful, |
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | Lesser General Public License for more details. |
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| 15 | |
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| 16 | You should have received a copy of the GNU Lesser General Public |
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| 17 | License along with the GNU C Library; if not, see |
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| 18 | <https://www.gnu.org/licenses/>. */ |
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| 19 | |
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| 20 | #include <sysdep.h> |
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| 21 | #define USE_WITH_SSE2 1 |
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| 22 | |
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| 23 | #define VEC_SIZE 16 |
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| 24 | #define MOV_SIZE 3 |
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| 25 | #define RET_SIZE 1 |
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| 26 | |
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| 27 | #define VEC(i) xmm##i |
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| 28 | #define VMOVU movups |
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| 29 | #define VMOVA movaps |
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| 30 | |
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| 31 | # define MEMSET_SET_VEC0_AND_SET_RETURN(d, r) \ |
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| 32 | movd d, %xmm0; \ |
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| 33 | movq r, %rax; \ |
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| 34 | punpcklbw %xmm0, %xmm0; \ |
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| 35 | punpcklwd %xmm0, %xmm0; \ |
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| 36 | pshufd $0, %xmm0, %xmm0 |
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| 37 | |
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| 38 | # define WMEMSET_SET_VEC0_AND_SET_RETURN(d, r) \ |
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| 39 | movd d, %xmm0; \ |
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| 40 | pshufd $0, %xmm0, %xmm0; \ |
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| 41 | movq r, %rax |
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| 42 | |
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| 43 | # define MEMSET_VDUP_TO_VEC0_HIGH() |
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| 44 | # define MEMSET_VDUP_TO_VEC0_LOW() |
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| 45 | |
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| 46 | # define WMEMSET_VDUP_TO_VEC0_HIGH() |
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| 47 | # define WMEMSET_VDUP_TO_VEC0_LOW() |
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| 48 | |
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| 49 | #define SECTION(p) p |
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| 50 | |
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| 51 | #ifndef MEMSET_SYMBOL |
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| 52 | # define MEMSET_CHK_SYMBOL(p,s) p |
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| 53 | # define MEMSET_SYMBOL(p,s) memset |
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| 54 | #endif |
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| 55 | |
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| 56 | #ifndef WMEMSET_SYMBOL |
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| 57 | # define WMEMSET_CHK_SYMBOL(p,s) p |
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| 58 | # define WMEMSET_SYMBOL(p,s) __wmemset |
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| 59 | #endif |
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| 60 | |
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| 61 | #include "multiarch/memset-vec-unaligned-erms.S" |
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| 62 | |
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| 63 | libc_hidden_builtin_def (memset) |
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| 64 | |
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| 65 | #if IS_IN (libc) |
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| 66 | libc_hidden_def (__wmemset) |
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| 67 | weak_alias (__wmemset, wmemset) |
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| 68 | libc_hidden_weak (wmemset) |
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| 69 | #endif |
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| 70 | |
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