--- /dev/null
+/*
+ * 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>
+
+typedef u8 u8x16u __attribute__ ((vector_size (16), aligned (1)));
+typedef u8 u8x32u __attribute__ ((vector_size (32), aligned (1)));
+
+static inline void
+clib_mov16 (u8 * dst, const u8 * src)
+{
+ *(u8x16u *) dst = *(u8x16u *) src;
+}
+
+static inline void
+clib_mov32 (u8 * dst, const u8 * src)
+{
+ *(u8x32u *) dst = *(u8x32u *) src;
+}
+
+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 (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 = 16 - ((uword) dst & 0x0F) + 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:
+ */
Code Review / vpp.git / blobdiff