| /* |
| * Copyright (c) 2016 Cisco and/or its affiliates. |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at: |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /*- |
| * BSD LICENSE |
| * |
| * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Intel Corporation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #ifndef included_clib_memcpy_sse3_h |
| #define included_clib_memcpy_sse3_h |
| |
| #include <stdint.h> |
| #include <x86intrin.h> |
| |
| static inline void |
| clib_mov16 (u8 * dst, const u8 * src) |
| { |
| __m128i xmm0; |
| |
| xmm0 = _mm_loadu_si128 ((const __m128i *) src); |
| _mm_storeu_si128 ((__m128i *) dst, xmm0); |
| } |
| |
| static inline void |
| clib_mov32 (u8 * dst, const u8 * src) |
| { |
| clib_mov16 ((u8 *) dst + 0 * 16, (const u8 *) src + 0 * 16); |
| clib_mov16 ((u8 *) dst + 1 * 16, (const u8 *) src + 1 * 16); |
| } |
| |
| static inline void |
| clib_mov64 (u8 * dst, const u8 * src) |
| { |
| clib_mov32 ((u8 *) dst + 0 * 32, (const u8 *) src + 0 * 32); |
| clib_mov32 ((u8 *) dst + 1 * 32, (const u8 *) src + 1 * 32); |
| } |
| |
| static inline void |
| clib_mov128 (u8 * dst, const u8 * src) |
| { |
| clib_mov64 ((u8 *) dst + 0 * 64, (const u8 *) src + 0 * 64); |
| clib_mov64 ((u8 *) dst + 1 * 64, (const u8 *) src + 1 * 64); |
| } |
| |
| static inline void |
| clib_mov256 (u8 * dst, const u8 * src) |
| { |
| clib_mov128 ((u8 *) dst + 0 * 128, (const u8 *) src + 0 * 128); |
| clib_mov128 ((u8 *) dst + 1 * 128, (const u8 *) src + 1 * 128); |
| } |
| |
| /** |
| * Macro for copying unaligned block from one location to another with constant load offset, |
| * 47 bytes leftover maximum, |
| * locations should not overlap. |
| * Requirements: |
| * - Store is aligned |
| * - Load offset is <offset>, which must be immediate value within [1, 15] |
| * - For <src>, make sure <offset> bit backwards & <16 - offset> bit forwards are available for loading |
| * - <dst>, <src>, <len> must be variables |
| * - __m128i <xmm0> ~ <xmm8> must be pre-defined |
| */ |
| #define CLIB_MVUNALIGN_LEFT47_IMM(dst, src, len, offset) \ |
| ({ \ |
| int tmp; \ |
| while (len >= 128 + 16 - offset) { \ |
| xmm0 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 0 * 16)); \ |
| len -= 128; \ |
| xmm1 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 1 * 16)); \ |
| xmm2 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 2 * 16)); \ |
| xmm3 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 3 * 16)); \ |
| xmm4 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 4 * 16)); \ |
| xmm5 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 5 * 16)); \ |
| xmm6 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 6 * 16)); \ |
| xmm7 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 7 * 16)); \ |
| xmm8 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 8 * 16)); \ |
| src = (const u8 *)src + 128; \ |
| _mm_storeu_si128((__m128i *)((u8 *)dst + 0 * 16), _mm_alignr_epi8(xmm1, xmm0, offset)); \ |
| _mm_storeu_si128((__m128i *)((u8 *)dst + 1 * 16), _mm_alignr_epi8(xmm2, xmm1, offset)); \ |
| _mm_storeu_si128((__m128i *)((u8 *)dst + 2 * 16), _mm_alignr_epi8(xmm3, xmm2, offset)); \ |
| _mm_storeu_si128((__m128i *)((u8 *)dst + 3 * 16), _mm_alignr_epi8(xmm4, xmm3, offset)); \ |
| _mm_storeu_si128((__m128i *)((u8 *)dst + 4 * 16), _mm_alignr_epi8(xmm5, xmm4, offset)); \ |
| _mm_storeu_si128((__m128i *)((u8 *)dst + 5 * 16), _mm_alignr_epi8(xmm6, xmm5, offset)); \ |
| _mm_storeu_si128((__m128i *)((u8 *)dst + 6 * 16), _mm_alignr_epi8(xmm7, xmm6, offset)); \ |
| _mm_storeu_si128((__m128i *)((u8 *)dst + 7 * 16), _mm_alignr_epi8(xmm8, xmm7, offset)); \ |
| dst = (u8 *)dst + 128; \ |
| } \ |
| tmp = len; \ |
| len = ((len - 16 + offset) & 127) + 16 - offset; \ |
| tmp -= len; \ |
| src = (const u8 *)src + tmp; \ |
| dst = (u8 *)dst + tmp; \ |
| if (len >= 32 + 16 - offset) { \ |
| while (len >= 32 + 16 - offset) { \ |
| xmm0 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 0 * 16)); \ |
| len -= 32; \ |
| xmm1 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 1 * 16)); \ |
| xmm2 = _mm_loadu_si128((const __m128i *)((const u8 *)src - offset + 2 * 16)); \ |
| src = (const u8 *)src + 32; \ |
| _mm_storeu_si128((__m128i *)((u8 *)dst + 0 * 16), _mm_alignr_epi8(xmm1, xmm0, offset)); \ |
| _mm_storeu_si128((__m128i *)((u8 *)dst + 1 * 16), _mm_alignr_epi8(xmm2, xmm1, offset)); \ |
| dst = (u8 *)dst + 32; \ |
| } \ |
| tmp = len; \ |
| len = ((len - 16 + offset) & 31) + 16 - offset; \ |
| tmp -= len; \ |
| src = (const u8 *)src + tmp; \ |
| dst = (u8 *)dst + tmp; \ |
| } \ |
| }) |
| |
| /** |
| * Macro for copying unaligned block from one location to another, |
| * 47 bytes leftover maximum, |
| * locations should not overlap. |
| * Use switch here because the aligning instruction requires immediate value for shift count. |
| * Requirements: |
| * - Store is aligned |
| * - Load offset is <offset>, which must be within [1, 15] |
| * - For <src>, make sure <offset> bit backwards & <16 - offset> bit forwards are available for loading |
| * - <dst>, <src>, <len> must be variables |
| * - __m128i <xmm0> ~ <xmm8> used in CLIB_MVUNALIGN_LEFT47_IMM must be pre-defined |
| */ |
| #define CLIB_MVUNALIGN_LEFT47(dst, src, len, offset) \ |
| ({ \ |
| switch (offset) { \ |
| case 0x01: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x01); break; \ |
| case 0x02: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x02); break; \ |
| case 0x03: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x03); break; \ |
| case 0x04: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x04); break; \ |
| case 0x05: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x05); break; \ |
| case 0x06: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x06); break; \ |
| case 0x07: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x07); break; \ |
| case 0x08: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x08); break; \ |
| case 0x09: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x09); break; \ |
| case 0x0A: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x0A); break; \ |
| case 0x0B: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x0B); break; \ |
| case 0x0C: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x0C); break; \ |
| case 0x0D: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x0D); break; \ |
| case 0x0E: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x0E); break; \ |
| case 0x0F: CLIB_MVUNALIGN_LEFT47_IMM(dst, src, n, 0x0F); break; \ |
| default:; \ |
| } \ |
| }) |
| |
| static inline void * |
| clib_memcpy_fast (void *dst, const void *src, size_t n) |
| { |
| __m128i xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7, xmm8; |
| uword dstu = (uword) dst; |
| uword srcu = (uword) src; |
| void *ret = dst; |
| size_t dstofss; |
| size_t srcofs; |
| |
| /** |
| * Copy less than 16 bytes |
| */ |
| if (n < 16) |
| { |
| if (n & 0x01) |
| { |
| *(u8 *) dstu = *(const u8 *) srcu; |
| srcu = (uword) ((const u8 *) srcu + 1); |
| dstu = (uword) ((u8 *) dstu + 1); |
| } |
| if (n & 0x02) |
| { |
| *(u16 *) dstu = *(const u16 *) srcu; |
| srcu = (uword) ((const u16 *) srcu + 1); |
| dstu = (uword) ((u16 *) dstu + 1); |
| } |
| if (n & 0x04) |
| { |
| *(u32 *) dstu = *(const u32 *) srcu; |
| srcu = (uword) ((const u32 *) srcu + 1); |
| dstu = (uword) ((u32 *) dstu + 1); |
| } |
| if (n & 0x08) |
| { |
| *(u64 *) dstu = *(const u64 *) srcu; |
| } |
| return ret; |
| } |
| |
| /** |
| * Fast way when copy size doesn't exceed 512 bytes |
| */ |
| if (n <= 32) |
| { |
| clib_mov16 ((u8 *) dst, (const u8 *) src); |
| clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n); |
| return ret; |
| } |
| if (n <= 48) |
| { |
| clib_mov32 ((u8 *) dst, (const u8 *) src); |
| clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n); |
| return ret; |
| } |
| if (n <= 64) |
| { |
| clib_mov32 ((u8 *) dst, (const u8 *) src); |
| clib_mov16 ((u8 *) dst + 32, (const u8 *) src + 32); |
| clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n); |
| return ret; |
| } |
| if (n <= 128) |
| { |
| goto COPY_BLOCK_128_BACK15; |
| } |
| if (n <= 512) |
| { |
| if (n >= 256) |
| { |
| n -= 256; |
| clib_mov128 ((u8 *) dst, (const u8 *) src); |
| clib_mov128 ((u8 *) dst + 128, (const u8 *) src + 128); |
| src = (const u8 *) src + 256; |
| dst = (u8 *) dst + 256; |
| } |
| COPY_BLOCK_255_BACK15: |
| if (n >= 128) |
| { |
| n -= 128; |
| clib_mov128 ((u8 *) dst, (const u8 *) src); |
| src = (const u8 *) src + 128; |
| dst = (u8 *) dst + 128; |
| } |
| COPY_BLOCK_128_BACK15: |
| if (n >= 64) |
| { |
| n -= 64; |
| clib_mov64 ((u8 *) dst, (const u8 *) src); |
| src = (const u8 *) src + 64; |
| dst = (u8 *) dst + 64; |
| } |
| COPY_BLOCK_64_BACK15: |
| if (n >= 32) |
| { |
| n -= 32; |
| clib_mov32 ((u8 *) dst, (const u8 *) src); |
| src = (const u8 *) src + 32; |
| dst = (u8 *) dst + 32; |
| } |
| if (n > 16) |
| { |
| clib_mov16 ((u8 *) dst, (const u8 *) src); |
| clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n); |
| return ret; |
| } |
| if (n > 0) |
| { |
| clib_mov16 ((u8 *) dst - 16 + n, (const u8 *) src - 16 + n); |
| } |
| return ret; |
| } |
| |
| /** |
| * Make store aligned when copy size exceeds 512 bytes, |
| * and make sure the first 15 bytes are copied, because |
| * unaligned copy functions require up to 15 bytes |
| * backwards access. |
| */ |
| dstofss = (uword) dst & 0x0F; |
| if (dstofss > 0) |
| { |
| dstofss = 16 - dstofss + 16; |
| n -= dstofss; |
| clib_mov32 ((u8 *) dst, (const u8 *) src); |
| src = (const u8 *) src + dstofss; |
| dst = (u8 *) dst + dstofss; |
| } |
| srcofs = ((uword) src & 0x0F); |
| |
| /** |
| * For aligned copy |
| */ |
| if (srcofs == 0) |
| { |
| /** |
| * Copy 256-byte blocks |
| */ |
| for (; n >= 256; n -= 256) |
| { |
| clib_mov256 ((u8 *) dst, (const u8 *) src); |
| dst = (u8 *) dst + 256; |
| src = (const u8 *) src + 256; |
| } |
| |
| /** |
| * Copy whatever left |
| */ |
| goto COPY_BLOCK_255_BACK15; |
| } |
| |
| /** |
| * For copy with unaligned load |
| */ |
| CLIB_MVUNALIGN_LEFT47 (dst, src, n, srcofs); |
| |
| /** |
| * Copy whatever left |
| */ |
| goto COPY_BLOCK_64_BACK15; |
| } |
| |
| |
| #undef CLIB_MVUNALIGN_LEFT47_IMM |
| #undef CLIB_MVUNALIGN_LEFT47 |
| |
| #endif /* included_clib_memcpy_sse3_h */ |
| |
| |
| /* |
| * fd.io coding-style-patch-verification: ON |
| * |
| * Local Variables: |
| * eval: (c-set-style "gnu") |
| * End: |
| */ |