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48 #ifndef included_clib_memcpy_avx512_h
49 #define included_clib_memcpy_avx512_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)
77 zmm0 = _mm512_loadu_si512 ((const void *) src);
78 _mm512_storeu_si512 ((void *) dst, zmm0);
82 clib_mov128 (u8 * dst, const u8 * src)
84 clib_mov64 (dst + 0 * 64, src + 0 * 64);
85 clib_mov64 (dst + 1 * 64, src + 1 * 64);
89 clib_mov256 (u8 * dst, const u8 * src)
91 clib_mov128 (dst + 0 * 128, src + 0 * 128);
92 clib_mov128 (dst + 1 * 128, src + 1 * 128);
96 clib_mov128blocks (u8 * dst, const u8 * src, size_t n)
102 zmm0 = _mm512_loadu_si512 ((const void *) (src + 0 * 64));
104 zmm1 = _mm512_loadu_si512 ((const void *) (src + 1 * 64));
106 _mm512_storeu_si512 ((void *) (dst + 0 * 64), zmm0);
107 _mm512_storeu_si512 ((void *) (dst + 1 * 64), zmm1);
113 clib_mov512blocks (u8 * dst, const u8 * src, size_t n)
115 __m512i zmm0, zmm1, zmm2, zmm3, zmm4, zmm5, zmm6, zmm7;
119 zmm0 = _mm512_loadu_si512 ((const void *) (src + 0 * 64));
121 zmm1 = _mm512_loadu_si512 ((const void *) (src + 1 * 64));
122 zmm2 = _mm512_loadu_si512 ((const void *) (src + 2 * 64));
123 zmm3 = _mm512_loadu_si512 ((const void *) (src + 3 * 64));
124 zmm4 = _mm512_loadu_si512 ((const void *) (src + 4 * 64));
125 zmm5 = _mm512_loadu_si512 ((const void *) (src + 5 * 64));
126 zmm6 = _mm512_loadu_si512 ((const void *) (src + 6 * 64));
127 zmm7 = _mm512_loadu_si512 ((const void *) (src + 7 * 64));
129 _mm512_storeu_si512 ((void *) (dst + 0 * 64), zmm0);
130 _mm512_storeu_si512 ((void *) (dst + 1 * 64), zmm1);
131 _mm512_storeu_si512 ((void *) (dst + 2 * 64), zmm2);
132 _mm512_storeu_si512 ((void *) (dst + 3 * 64), zmm3);
133 _mm512_storeu_si512 ((void *) (dst + 4 * 64), zmm4);
134 _mm512_storeu_si512 ((void *) (dst + 5 * 64), zmm5);
135 _mm512_storeu_si512 ((void *) (dst + 6 * 64), zmm6);
136 _mm512_storeu_si512 ((void *) (dst + 7 * 64), zmm7);
142 clib_memcpy (void *dst, const void *src, size_t n)
144 uword dstu = (uword) dst;
145 uword srcu = (uword) src;
151 * Copy less than 16 bytes
157 *(u8 *) dstu = *(const u8 *) srcu;
158 srcu = (uword) ((const u8 *) srcu + 1);
159 dstu = (uword) ((u8 *) dstu + 1);
163 *(u16 *) dstu = *(const u16 *) srcu;
164 srcu = (uword) ((const u16 *) srcu + 1);
165 dstu = (uword) ((u16 *) dstu + 1);
169 *(u32 *) dstu = *(const u32 *) srcu;
170 srcu = (uword) ((const u32 *) srcu + 1);
171 dstu = (uword) ((u32 *) dstu + 1);
174 *(u64 *) dstu = *(const u64 *) srcu;
179 * Fast way when copy size doesn't exceed 512 bytes
183 clib_mov16 ((u8 *) dst, (const u8 *) src);
184 clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n);
189 clib_mov32 ((u8 *) dst, (const u8 *) src);
190 clib_mov32 ((u8 *) dst - 32 + n, (const u8 *) src - 32 + n);
198 clib_mov256 ((u8 *) dst, (const u8 *) src);
199 src = (const u8 *) src + 256;
200 dst = (u8 *) dst + 256;
205 clib_mov128 ((u8 *) dst, (const u8 *) src);
206 src = (const u8 *) src + 128;
207 dst = (u8 *) dst + 128;
209 COPY_BLOCK_128_BACK63:
212 clib_mov64 ((u8 *) dst, (const u8 *) src);
213 clib_mov64 ((u8 *) dst - 64 + n, (const u8 *) src - 64 + n);
217 clib_mov64 ((u8 *) dst - 64 + n, (const u8 *) src - 64 + n);
222 * Make store aligned when copy size exceeds 512 bytes
224 dstofss = (uword) dst & 0x3F;
227 dstofss = 64 - dstofss;
229 clib_mov64 ((u8 *) dst, (const u8 *) src);
230 src = (const u8 *) src + dstofss;
231 dst = (u8 *) dst + dstofss;
235 * Copy 512-byte blocks.
236 * Use copy block function for better instruction order control,
237 * which is important when load is unaligned.
239 clib_mov512blocks ((u8 *) dst, (const u8 *) src, n);
243 src = (const u8 *) src + bits;
244 dst = (u8 *) dst + bits;
247 * Copy 128-byte blocks.
248 * Use copy block function for better instruction order control,
249 * which is important when load is unaligned.
253 clib_mov128blocks ((u8 *) dst, (const u8 *) src, n);
257 src = (const u8 *) src + bits;
258 dst = (u8 *) dst + bits;
264 goto COPY_BLOCK_128_BACK63;
268 #endif /* included_clib_mamcpy_avx512_h */
272 * fd.io coding-style-patch-verification: ON
275 * eval: (c-set-style "gnu")