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.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
18 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
19 * All rights reserved.
21 * Redistribution and use in source and binary forms, with or without
22 * modification, are permitted provided that the following conditions
25 * * Redistributions of source code must retain the above copyright
26 * notice, this list of conditions and the following disclaimer.
27 * * Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in
29 * the documentation and/or other materials provided with the
31 * * Neither the name of Intel Corporation nor the names of its
32 * contributors may be used to endorse or promote products derived
33 * from this software without specific prior written permission.
35 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
48 #ifndef included_clib_memcpy_sse3_h
49 #define included_clib_memcpy_sse3_h
52 #include <x86intrin.h>
53 #include <vppinfra/warnings.h>
56 WARN_OFF (stringop-overflow)
60 clib_mov16 (u8 * dst, const u8 * src)
64 xmm0 = _mm_loadu_si128 ((const __m128i *) src);
65 _mm_storeu_si128 ((__m128i *) dst, xmm0);
69 clib_mov32 (u8 * dst, const u8 * src)
71 clib_mov16 ((u8 *) dst + 0 * 16, (const u8 *) src + 0 * 16);
72 clib_mov16 ((u8 *) dst + 1 * 16, (const u8 *) src + 1 * 16);
76 clib_mov64 (u8 * dst, const u8 * src)
78 clib_mov32 ((u8 *) dst + 0 * 32, (const u8 *) src + 0 * 32);
79 clib_mov32 ((u8 *) dst + 1 * 32, (const u8 *) src + 1 * 32);
83 clib_mov128 (u8 * dst, const u8 * src)
85 clib_mov64 ((u8 *) dst + 0 * 64, (const u8 *) src + 0 * 64);
86 clib_mov64 ((u8 *) dst + 1 * 64, (const u8 *) src + 1 * 64);
90 clib_mov256 (u8 * dst, const u8 * src)
92 clib_mov128 ((u8 *) dst + 0 * 128, (const u8 *) src + 0 * 128);
93 clib_mov128 ((u8 *) dst + 1 * 128, (const u8 *) src + 1 * 128);
97 * Macro for copying unaligned block from one location to another with constant load offset,
98 * 47 bytes leftover maximum,
99 * locations should not overlap.
102 * - Load offset is <offset>, which must be immediate value within [1, 15]
103 * - For <src>, make sure <offset> bit backwards & <16 - offset> bit forwards are available for loading
104 * - <dst>, <src>, <len> must be variables
105 * - __m128i <xmm0> ~ <xmm8> must be pre-defined
107 #define CLIB_MVUNALIGN_LEFT47_IMM(dst, src, len, offset) \
110 while (len >= 128 + 16 - offset) { \
111 xmm0 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 0 * 16)); \
113 xmm1 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 1 * 16)); \
114 xmm2 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 2 * 16)); \
115 xmm3 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 3 * 16)); \
116 xmm4 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 4 * 16)); \
117 xmm5 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 5 * 16)); \
118 xmm6 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 6 * 16)); \
119 xmm7 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 7 * 16)); \
120 xmm8 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 8 * 16)); \
121 src = (const u8 *)src + 128; \
122 _mm_storeu_si128((__m128i *)((u8 *)dst + 0 * 16), _mm_alignr_epi8(xmm1, xmm0, offset)); \
123 _mm_storeu_si128((__m128i *)((u8 *)dst + 1 * 16), _mm_alignr_epi8(xmm2, xmm1, offset)); \
124 _mm_storeu_si128((__m128i *)((u8 *)dst + 2 * 16), _mm_alignr_epi8(xmm3, xmm2, offset)); \
125 _mm_storeu_si128((__m128i *)((u8 *)dst + 3 * 16), _mm_alignr_epi8(xmm4, xmm3, offset)); \
126 _mm_storeu_si128((__m128i *)((u8 *)dst + 4 * 16), _mm_alignr_epi8(xmm5, xmm4, offset)); \
127 _mm_storeu_si128((__m128i *)((u8 *)dst + 5 * 16), _mm_alignr_epi8(xmm6, xmm5, offset)); \
128 _mm_storeu_si128((__m128i *)((u8 *)dst + 6 * 16), _mm_alignr_epi8(xmm7, xmm6, offset)); \
129 _mm_storeu_si128((__m128i *)((u8 *)dst + 7 * 16), _mm_alignr_epi8(xmm8, xmm7, offset)); \
130 dst = (u8 *)dst + 128; \
133 len = ((len - 16 + offset) & 127) + 16 - offset; \
135 src = (const u8 *)src + tmp; \
136 dst = (u8 *)dst + tmp; \
137 if (len >= 32 + 16 - offset) { \
138 while (len >= 32 + 16 - offset) { \
139 xmm0 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 0 * 16)); \
141 xmm1 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 1 * 16)); \
142 xmm2 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 2 * 16)); \
143 src = (const u8 *)src + 32; \
144 _mm_storeu_si128((__m128i *)((u8 *)dst + 0 * 16), _mm_alignr_epi8(xmm1, xmm0, offset)); \
145 _mm_storeu_si128((__m128i *)((u8 *)dst + 1 * 16), _mm_alignr_epi8(xmm2, xmm1, offset)); \
146 dst = (u8 *)dst + 32; \
149 len = ((len - 16 + offset) & 31) + 16 - offset; \
151 src = (const u8 *)src + tmp; \
152 dst = (u8 *)dst + tmp; \
157 * Macro for copying unaligned block from one location to another,
158 * 47 bytes leftover maximum,
159 * locations should not overlap.
160 * Use switch here because the aligning instruction requires immediate value for shift count.
163 * - Load offset is <offset>, which must be within [1, 15]
164 * - For <src>, make sure <offset> bit backwards & <16 - offset> bit forwards are available for loading
165 * - <dst>, <src>, <len> must be variables
166 * - __m128i <xmm0> ~ <xmm8> used in CLIB_MVUNALIGN_LEFT47_IMM must be pre-defined
168 #define CLIB_MVUNALIGN_LEFT47(dst, src, len, offset) \
171 case 0x01: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x01); break; \
172 case 0x02: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x02); break; \
173 case 0x03: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x03); break; \
174 case 0x04: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x04); break; \
175 case 0x05: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x05); break; \
176 case 0x06: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x06); break; \
177 case 0x07: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x07); break; \
178 case 0x08: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x08); break; \
179 case 0x09: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x09); break; \
180 case 0x0A: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x0A); break; \
181 case 0x0B: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x0B); break; \
182 case 0x0C: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x0C); break; \
183 case 0x0D: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x0D); break; \
184 case 0x0E: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x0E); break; \
185 case 0x0F: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x0F); break; \
191 clib_memcpy_fast (void *dst, const void *src, size_t n)
193 __m128i xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7, xmm8;
194 uword dstu = (uword) dst;
195 uword srcu = (uword) src;
201 * Copy less than 16 bytes
207 *(u8 *) dstu = *(const u8 *) srcu;
208 srcu = (uword) ((const u8 *) srcu + 1);
209 dstu = (uword) ((u8 *) dstu + 1);
213 *(u16 *) dstu = *(const u16 *) srcu;
214 srcu = (uword) ((const u16 *) srcu + 1);
215 dstu = (uword) ((u16 *) dstu + 1);
219 *(u32 *) dstu = *(const u32 *) srcu;
220 srcu = (uword) ((const u32 *) srcu + 1);
221 dstu = (uword) ((u32 *) dstu + 1);
225 *(u64 *) dstu = *(const u64 *) srcu;
231 * Fast way when copy size doesn't exceed 512 bytes
235 clib_mov16 ((u8 *) dst, (const u8 *) src);
236 clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n);
241 clib_mov32 ((u8 *) dst, (const u8 *) src);
242 clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n);
247 clib_mov32 ((u8 *) dst, (const u8 *) src);
248 clib_mov16 ((u8 *) dst + 32, (const u8 *) src + 32);
249 clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n);
254 goto COPY_BLOCK_128_BACK15;
261 clib_mov128 ((u8 *) dst, (const u8 *) src);
262 clib_mov128 ((u8 *) dst + 128, (const u8 *) src + 128);
263 src = (const u8 *) src + 256;
264 dst = (u8 *) dst + 256;
266 COPY_BLOCK_255_BACK15:
270 clib_mov128 ((u8 *) dst, (const u8 *) src);
271 src = (const u8 *) src + 128;
272 dst = (u8 *) dst + 128;
274 COPY_BLOCK_128_BACK15:
278 clib_mov64 ((u8 *) dst, (const u8 *) src);
279 src = (const u8 *) src + 64;
280 dst = (u8 *) dst + 64;
282 COPY_BLOCK_64_BACK15:
286 clib_mov32 ((u8 *) dst, (const u8 *) src);
287 src = (const u8 *) src + 32;
288 dst = (u8 *) dst + 32;
292 clib_mov16 ((u8 *) dst, (const u8 *) src);
293 clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n);
298 clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n);
304 * Make store aligned when copy size exceeds 512 bytes,
305 * and make sure the first 15 bytes are copied, because
306 * unaligned copy functions require up to 15 bytes
309 dstofss = (uword) dst & 0x0F;
312 dstofss = 16 - dstofss + 16;
314 clib_mov32 ((u8 *) dst, (const u8 *) src);
315 src = (const u8 *) src + dstofss;
316 dst = (u8 *) dst + dstofss;
318 srcofs = ((uword) src & 0x0F);
326 * Copy 256-byte blocks
328 for (; n >= 256; n -= 256)
330 clib_mov256 ((u8 *) dst, (const u8 *) src);
331 dst = (u8 *) dst + 256;
332 src = (const u8 *) src + 256;
338 goto COPY_BLOCK_255_BACK15;
342 * For copy with unaligned load
344 CLIB_MVUNALIGN_LEFT47 (dst, src, n, srcofs);
349 goto COPY_BLOCK_64_BACK15;
353 WARN_ON (stringop-overflow)
356 #undef CLIB_MVUNALIGN_LEFT47_IMM
357 #undef CLIB_MVUNALIGN_LEFT47
359 #endif /* included_clib_memcpy_sse3_h */
363 * fd.io coding-style-patch-verification: ON
366 * eval: (c-set-style "gnu")