2 * Copyright (c) 2016 Cisco and/or its affiliates.
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48 #ifndef included_clib_memcpy_avx_h
49 #define included_clib_memcpy_avx_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_mov256 (u8 * dst, const u8 * src)
89 clib_mov128 ((u8 *) dst + 0 * 128, (const u8 *) src + 0 * 128);
90 clib_mov128 ((u8 *) dst + 1 * 128, (const u8 *) src + 1 * 128);
94 clib_mov64blocks (u8 * dst, const u8 * src, size_t n)
101 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 0 * 32));
104 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 1 * 32));
105 src = (const u8 *) src + 64;
106 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 0 * 32), ymm0);
107 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 1 * 32), ymm1);
108 dst = (u8 *) dst + 64;
113 clib_mov256blocks (u8 * dst, const u8 * src, size_t n)
115 __m256i ymm0, ymm1, ymm2, ymm3, ymm4, ymm5, ymm6, ymm7;
120 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 0 * 32));
123 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 1 * 32));
125 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 2 * 32));
127 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 3 * 32));
129 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 4 * 32));
131 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 5 * 32));
133 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 6 * 32));
135 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 7 * 32));
136 src = (const u8 *) src + 256;
137 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 0 * 32), ymm0);
138 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 1 * 32), ymm1);
139 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 2 * 32), ymm2);
140 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 3 * 32), ymm3);
141 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 4 * 32), ymm4);
142 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 5 * 32), ymm5);
143 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 6 * 32), ymm6);
144 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 7 * 32), ymm7);
145 dst = (u8 *) dst + 256;
150 clib_memcpy (void *dst, const void *src, size_t n)
152 uword dstu = (uword) dst;
153 uword srcu = (uword) src;
159 * Copy less than 16 bytes
165 *(u8 *) dstu = *(const u8 *) srcu;
166 srcu = (uword) ((const u8 *) srcu + 1);
167 dstu = (uword) ((u8 *) dstu + 1);
171 *(uint16_t *) dstu = *(const uint16_t *) srcu;
172 srcu = (uword) ((const uint16_t *) srcu + 1);
173 dstu = (uword) ((uint16_t *) dstu + 1);
177 *(uint32_t *) dstu = *(const uint32_t *) srcu;
178 srcu = (uword) ((const uint32_t *) srcu + 1);
179 dstu = (uword) ((uint32_t *) dstu + 1);
183 *(uint64_t *) dstu = *(const uint64_t *) srcu;
189 * Fast way when copy size doesn't exceed 512 bytes
193 clib_mov16 ((u8 *) dst, (const u8 *) src);
194 clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n);
199 clib_mov32 ((u8 *) dst, (const u8 *) src);
200 clib_mov32 ((u8 *) dst - 32 + n, (const u8 *) src - 32 + n);
208 clib_mov256 ((u8 *) dst, (const u8 *) src);
209 src = (const u8 *) src + 256;
210 dst = (u8 *) dst + 256;
215 clib_mov128 ((u8 *) dst, (const u8 *) src);
216 src = (const u8 *) src + 128;
217 dst = (u8 *) dst + 128;
222 clib_mov64 ((u8 *) dst, (const u8 *) src);
223 src = (const u8 *) src + 64;
224 dst = (u8 *) dst + 64;
226 COPY_BLOCK_64_BACK31:
229 clib_mov32 ((u8 *) dst, (const u8 *) src);
230 clib_mov32 ((u8 *) dst - 32 + n, (const u8 *) src - 32 + n);
235 clib_mov32 ((u8 *) dst - 32 + n, (const u8 *) src - 32 + n);
241 * Make store aligned when copy size exceeds 512 bytes
243 dstofss = (uword) dst & 0x1F;
246 dstofss = 32 - dstofss;
248 clib_mov32 ((u8 *) dst, (const u8 *) src);
249 src = (const u8 *) src + dstofss;
250 dst = (u8 *) dst + dstofss;
254 * Copy 256-byte blocks.
255 * Use copy block function for better instruction order control,
256 * which is important when load is unaligned.
258 clib_mov256blocks ((u8 *) dst, (const u8 *) src, n);
262 src = (const u8 *) src + bits;
263 dst = (u8 *) dst + bits;
266 * Copy 64-byte blocks.
267 * Use copy block function for better instruction order control,
268 * which is important when load is unaligned.
272 clib_mov64blocks ((u8 *) dst, (const u8 *) src, n);
276 src = (const u8 *) src + bits;
277 dst = (u8 *) dst + bits;
283 goto COPY_BLOCK_64_BACK31;
287 #endif /* included_clib_mamcpy_avx_h */
291 * fd.io coding-style-patch-verification: ON
294 * eval: (c-set-style "gnu")