/* * 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: */