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_avx_h
49 #define included_clib_memcpy_avx_h
52 #include <x86intrin.h>
54 typedef u8 u8x16u __attribute__ ((vector_size (16), aligned (1)));
55 typedef u8 u8x32u __attribute__ ((vector_size (32), aligned (1)));
58 clib_mov16 (u8 * dst, const u8 * src)
60 *(u8x16u *) dst = *(u8x16u *) src;
64 clib_mov32 (u8 * dst, const u8 * src)
66 *(u8x32u *) dst = *(u8x32u *) src;
70 clib_mov64 (u8 * dst, const u8 * src)
72 clib_mov32 ((u8 *) dst + 0 * 32, (const u8 *) src + 0 * 32);
73 clib_mov32 ((u8 *) dst + 1 * 32, (const u8 *) src + 1 * 32);
77 clib_mov128 (u8 * dst, const u8 * src)
79 clib_mov64 ((u8 *) dst + 0 * 64, (const u8 *) src + 0 * 64);
80 clib_mov64 ((u8 *) dst + 1 * 64, (const u8 *) src + 1 * 64);
84 clib_mov256 (u8 * dst, const u8 * src)
86 clib_mov128 ((u8 *) dst + 0 * 128, (const u8 *) src + 0 * 128);
87 clib_mov128 ((u8 *) dst + 1 * 128, (const u8 *) src + 1 * 128);
91 clib_mov64blocks (u8 * dst, const u8 * src, size_t n)
98 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 0 * 32));
101 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 1 * 32));
102 src = (const u8 *) src + 64;
103 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 0 * 32), ymm0);
104 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 1 * 32), ymm1);
105 dst = (u8 *) dst + 64;
110 clib_mov256blocks (u8 * dst, const u8 * src, size_t n)
112 __m256i ymm0, ymm1, ymm2, ymm3, ymm4, ymm5, ymm6, ymm7;
117 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 0 * 32));
120 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 1 * 32));
122 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 2 * 32));
124 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 3 * 32));
126 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 4 * 32));
128 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 5 * 32));
130 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 6 * 32));
132 _mm256_loadu_si256 ((const __m256i *) ((const u8 *) src + 7 * 32));
133 src = (const u8 *) src + 256;
134 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 0 * 32), ymm0);
135 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 1 * 32), ymm1);
136 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 2 * 32), ymm2);
137 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 3 * 32), ymm3);
138 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 4 * 32), ymm4);
139 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 5 * 32), ymm5);
140 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 6 * 32), ymm6);
141 _mm256_storeu_si256 ((__m256i *) ((u8 *) dst + 7 * 32), ymm7);
142 dst = (u8 *) dst + 256;
147 clib_memcpy (void *dst, const void *src, size_t n)
149 uword dstu = (uword) dst;
150 uword srcu = (uword) src;
156 * Copy less than 16 bytes
162 *(u8 *) dstu = *(const u8 *) srcu;
163 srcu = (uword) ((const u8 *) srcu + 1);
164 dstu = (uword) ((u8 *) dstu + 1);
168 *(uint16_t *) dstu = *(const uint16_t *) srcu;
169 srcu = (uword) ((const uint16_t *) srcu + 1);
170 dstu = (uword) ((uint16_t *) dstu + 1);
174 *(uint32_t *) dstu = *(const uint32_t *) srcu;
175 srcu = (uword) ((const uint32_t *) srcu + 1);
176 dstu = (uword) ((uint32_t *) dstu + 1);
180 *(uint64_t *) dstu = *(const uint64_t *) srcu;
186 * Fast way when copy size doesn't exceed 512 bytes
190 clib_mov16 ((u8 *) dst, (const u8 *) src);
195 clib_mov16 ((u8 *) dst, (const u8 *) src);
196 clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n);
201 clib_mov32 ((u8 *) dst, (const u8 *) src);
202 clib_mov32 ((u8 *) dst - 32 + n, (const u8 *) src - 32 + n);
210 clib_mov256 ((u8 *) dst, (const u8 *) src);
211 src = (const u8 *) src + 256;
212 dst = (u8 *) dst + 256;
217 clib_mov128 ((u8 *) dst, (const u8 *) src);
218 src = (const u8 *) src + 128;
219 dst = (u8 *) dst + 128;
224 clib_mov64 ((u8 *) dst, (const u8 *) src);
225 src = (const u8 *) src + 64;
226 dst = (u8 *) dst + 64;
228 COPY_BLOCK_64_BACK31:
231 clib_mov32 ((u8 *) dst, (const u8 *) src);
232 clib_mov32 ((u8 *) dst - 32 + n, (const u8 *) src - 32 + n);
237 clib_mov32 ((u8 *) dst - 32 + n, (const u8 *) src - 32 + n);
243 * Make store aligned when copy size exceeds 512 bytes
245 dstofss = (uword) dst & 0x1F;
248 dstofss = 32 - dstofss;
250 clib_mov32 ((u8 *) dst, (const u8 *) src);
251 src = (const u8 *) src + dstofss;
252 dst = (u8 *) dst + dstofss;
256 * Copy 256-byte blocks.
257 * Use copy block function for better instruction order control,
258 * which is important when load is unaligned.
260 clib_mov256blocks ((u8 *) dst, (const u8 *) src, n);
264 src = (const u8 *) src + bits;
265 dst = (u8 *) dst + bits;
268 * Copy 64-byte blocks.
269 * Use copy block function for better instruction order control,
270 * which is important when load is unaligned.
274 clib_mov64blocks ((u8 *) dst, (const u8 *) src, n);
278 src = (const u8 *) src + bits;
279 dst = (u8 *) dst + bits;
285 goto COPY_BLOCK_64_BACK31;
289 #endif /* included_clib_mamcpy_avx_h */
293 * fd.io coding-style-patch-verification: ON
296 * eval: (c-set-style "gnu")