2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
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48 #ifndef included_clib_memcpy_avx2_h
49 #define included_clib_memcpy_avx2_h
52 #include <x86intrin.h>
55 clib_mov16 (u8 * dst, const u8 * src)
59 xmm0 = _mm_loadu_si128 ((const __m128i *) src);
60 _mm_storeu_si128 ((__m128i *) dst, xmm0);
64 clib_mov32 (u8 * dst, const u8 * src)
68 ymm0 = _mm256_loadu_si256 ((const __m256i *) src);
69 _mm256_storeu_si256 ((__m256i *) dst, ymm0);
73 clib_mov64 (u8 * dst, const u8 * src)
75 clib_mov32 ((u8 *) dst + 0 * 32, (const u8 *) src + 0 * 32);
76 clib_mov32 ((u8 *) dst + 1 * 32, (const u8 *) src + 1 * 32);
80 clib_mov128 (u8 * dst, const u8 * src)
82 clib_mov64 ((u8 *) dst + 0 * 64, (const u8 *) src + 0 * 64);
83 clib_mov64 ((u8 *) dst + 1 * 64, (const u8 *) src + 1 * 64);
87 clib_mov128blocks (u8 * dst, const u8 * src, size_t n)
89 __m256i ymm0, ymm1, ymm2, ymm3;
94 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 0 * 32));
97 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 1 * 32));
99 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 2 * 32));
101 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 3 * 32));
102 src = (const u8 *) src + 128;
103 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 0 * 32), ymm0);
104 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 1 * 32), ymm1);
105 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 2 * 32), ymm2);
106 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 3 * 32), ymm3);
107 dst = (u8 *) dst + 128;
112 clib_memcpy (void *dst, const void *src, size_t n)
114 uword dstu = (uword) dst;
115 uword srcu = (uword) src;
121 * Copy less than 16 bytes
127 *(u8 *) dstu = *(const u8 *) srcu;
128 srcu = (uword) ((const u8 *) srcu + 1);
129 dstu = (uword) ((u8 *) dstu + 1);
133 *(u16 *) dstu = *(const u16 *) srcu;
134 srcu = (uword) ((const u16 *) srcu + 1);
135 dstu = (uword) ((u16 *) dstu + 1);
139 *(u32 *) dstu = *(const u32 *) srcu;
140 srcu = (uword) ((const u32 *) srcu + 1);
141 dstu = (uword) ((u32 *) dstu + 1);
145 *(u64 *) dstu = *(const u64 *) srcu;
151 * Fast way when copy size doesn't exceed 512 bytes
155 clib_mov16 ((u8 *) dst, (const u8 *) src);
156 clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n);
161 clib_mov16 ((u8 *) dst, (const u8 *) src);
162 clib_mov16 ((u8 *) dst + 16, (const u8 *) src + 16);
163 clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n);
168 clib_mov32 ((u8 *) dst, (const u8 *) src);
169 clib_mov32 ((u8 *) dst - 32 + n, (const u8 *) src - 32 + n);
177 clib_mov128 ((u8 *) dst, (const u8 *) src);
178 src = (const u8 *) src + 128;
179 dst = (u8 *) dst + 128;
181 COPY_BLOCK_128_BACK31:
185 clib_mov64 ((u8 *) dst, (const u8 *) src);
186 src = (const u8 *) src + 64;
187 dst = (u8 *) dst + 64;
191 clib_mov32 ((u8 *) dst, (const u8 *) src);
192 clib_mov32 ((u8 *) dst - 32 + n, (const u8 *) src - 32 + n);
197 clib_mov32 ((u8 *) dst - 32 + n, (const u8 *) src - 32 + n);
203 * Make store aligned when copy size exceeds 256 bytes
205 dstofss = (uword) dst & 0x1F;
208 dstofss = 32 - dstofss;
210 clib_mov32 ((u8 *) dst, (const u8 *) src);
211 src = (const u8 *) src + dstofss;
212 dst = (u8 *) dst + dstofss;
216 * Copy 128-byte blocks.
218 clib_mov128blocks ((u8 *) dst, (const u8 *) src, n);
222 src = (const u8 *) src + bits;
223 dst = (u8 *) dst + bits;
228 goto COPY_BLOCK_128_BACK31;
232 #endif /* included_clib_memcpy_avx2_h */
236 * fd.io coding-style-patch-verification: ON
239 * eval: (c-set-style "gnu")