--- /dev/null
+/*-
+ * 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 _RTE_MEMCPY_X86_64_H_
+#define _RTE_MEMCPY_X86_64_H_
+
+/**
+ * @file
+ *
+ * Functions for SSE/AVX/AVX2/AVX512 implementation of memcpy().
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <rte_vect.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Copy bytes from one location to another. The locations must not overlap.
+ *
+ * @note This is implemented as a macro, so it's address should not be taken
+ * and care is needed as parameter expressions may be evaluated multiple times.
+ *
+ * @param dst
+ * Pointer to the destination of the data.
+ * @param src
+ * Pointer to the source data.
+ * @param n
+ * Number of bytes to copy.
+ * @return
+ * Pointer to the destination data.
+ */
+static inline void *
+rte_memcpy(void *dst, const void *src, size_t n) __attribute__((always_inline));
+
+#ifdef RTE_MACHINE_CPUFLAG_AVX512F
+
+/**
+ * AVX512 implementation below
+ */
+
+/**
+ * Copy 16 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov16(uint8_t *dst, const uint8_t *src)
+{
+ __m128i xmm0;
+
+ xmm0 = _mm_loadu_si128((const __m128i *)src);
+ _mm_storeu_si128((__m128i *)dst, xmm0);
+}
+
+/**
+ * Copy 32 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov32(uint8_t *dst, const uint8_t *src)
+{
+ __m256i ymm0;
+
+ ymm0 = _mm256_loadu_si256((const __m256i *)src);
+ _mm256_storeu_si256((__m256i *)dst, ymm0);
+}
+
+/**
+ * Copy 64 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov64(uint8_t *dst, const uint8_t *src)
+{
+ __m512i zmm0;
+
+ zmm0 = _mm512_loadu_si512((const void *)src);
+ _mm512_storeu_si512((void *)dst, zmm0);
+}
+
+/**
+ * Copy 128 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov128(uint8_t *dst, const uint8_t *src)
+{
+ rte_mov64(dst + 0 * 64, src + 0 * 64);
+ rte_mov64(dst + 1 * 64, src + 1 * 64);
+}
+
+/**
+ * Copy 256 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov256(uint8_t *dst, const uint8_t *src)
+{
+ rte_mov64(dst + 0 * 64, src + 0 * 64);
+ rte_mov64(dst + 1 * 64, src + 1 * 64);
+ rte_mov64(dst + 2 * 64, src + 2 * 64);
+ rte_mov64(dst + 3 * 64, src + 3 * 64);
+}
+
+/**
+ * Copy 128-byte blocks from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov128blocks(uint8_t *dst, const uint8_t *src, size_t n)
+{
+ __m512i zmm0, zmm1;
+
+ while (n >= 128) {
+ zmm0 = _mm512_loadu_si512((const void *)(src + 0 * 64));
+ n -= 128;
+ zmm1 = _mm512_loadu_si512((const void *)(src + 1 * 64));
+ src = src + 128;
+ _mm512_storeu_si512((void *)(dst + 0 * 64), zmm0);
+ _mm512_storeu_si512((void *)(dst + 1 * 64), zmm1);
+ dst = dst + 128;
+ }
+}
+
+/**
+ * Copy 512-byte blocks from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov512blocks(uint8_t *dst, const uint8_t *src, size_t n)
+{
+ __m512i zmm0, zmm1, zmm2, zmm3, zmm4, zmm5, zmm6, zmm7;
+
+ while (n >= 512) {
+ zmm0 = _mm512_loadu_si512((const void *)(src + 0 * 64));
+ n -= 512;
+ zmm1 = _mm512_loadu_si512((const void *)(src + 1 * 64));
+ zmm2 = _mm512_loadu_si512((const void *)(src + 2 * 64));
+ zmm3 = _mm512_loadu_si512((const void *)(src + 3 * 64));
+ zmm4 = _mm512_loadu_si512((const void *)(src + 4 * 64));
+ zmm5 = _mm512_loadu_si512((const void *)(src + 5 * 64));
+ zmm6 = _mm512_loadu_si512((const void *)(src + 6 * 64));
+ zmm7 = _mm512_loadu_si512((const void *)(src + 7 * 64));
+ src = src + 512;
+ _mm512_storeu_si512((void *)(dst + 0 * 64), zmm0);
+ _mm512_storeu_si512((void *)(dst + 1 * 64), zmm1);
+ _mm512_storeu_si512((void *)(dst + 2 * 64), zmm2);
+ _mm512_storeu_si512((void *)(dst + 3 * 64), zmm3);
+ _mm512_storeu_si512((void *)(dst + 4 * 64), zmm4);
+ _mm512_storeu_si512((void *)(dst + 5 * 64), zmm5);
+ _mm512_storeu_si512((void *)(dst + 6 * 64), zmm6);
+ _mm512_storeu_si512((void *)(dst + 7 * 64), zmm7);
+ dst = dst + 512;
+ }
+}
+
+static inline void *
+rte_memcpy(void *dst, const void *src, size_t n)
+{
+ uintptr_t dstu = (uintptr_t)dst;
+ uintptr_t srcu = (uintptr_t)src;
+ void *ret = dst;
+ size_t dstofss;
+ size_t bits;
+
+ /**
+ * Copy less than 16 bytes
+ */
+ if (n < 16) {
+ if (n & 0x01) {
+ *(uint8_t *)dstu = *(const uint8_t *)srcu;
+ srcu = (uintptr_t)((const uint8_t *)srcu + 1);
+ dstu = (uintptr_t)((uint8_t *)dstu + 1);
+ }
+ if (n & 0x02) {
+ *(uint16_t *)dstu = *(const uint16_t *)srcu;
+ srcu = (uintptr_t)((const uint16_t *)srcu + 1);
+ dstu = (uintptr_t)((uint16_t *)dstu + 1);
+ }
+ if (n & 0x04) {
+ *(uint32_t *)dstu = *(const uint32_t *)srcu;
+ srcu = (uintptr_t)((const uint32_t *)srcu + 1);
+ dstu = (uintptr_t)((uint32_t *)dstu + 1);
+ }
+ if (n & 0x08)
+ *(uint64_t *)dstu = *(const uint64_t *)srcu;
+ return ret;
+ }
+
+ /**
+ * Fast way when copy size doesn't exceed 512 bytes
+ */
+ if (n <= 32) {
+ rte_mov16((uint8_t *)dst, (const uint8_t *)src);
+ rte_mov16((uint8_t *)dst - 16 + n,
+ (const uint8_t *)src - 16 + n);
+ return ret;
+ }
+ if (n <= 64) {
+ rte_mov32((uint8_t *)dst, (const uint8_t *)src);
+ rte_mov32((uint8_t *)dst - 32 + n,
+ (const uint8_t *)src - 32 + n);
+ return ret;
+ }
+ if (n <= 512) {
+ if (n >= 256) {
+ n -= 256;
+ rte_mov256((uint8_t *)dst, (const uint8_t *)src);
+ src = (const uint8_t *)src + 256;
+ dst = (uint8_t *)dst + 256;
+ }
+ if (n >= 128) {
+ n -= 128;
+ rte_mov128((uint8_t *)dst, (const uint8_t *)src);
+ src = (const uint8_t *)src + 128;
+ dst = (uint8_t *)dst + 128;
+ }
+COPY_BLOCK_128_BACK63:
+ if (n > 64) {
+ rte_mov64((uint8_t *)dst, (const uint8_t *)src);
+ rte_mov64((uint8_t *)dst - 64 + n,
+ (const uint8_t *)src - 64 + n);
+ return ret;
+ }
+ if (n > 0)
+ rte_mov64((uint8_t *)dst - 64 + n,
+ (const uint8_t *)src - 64 + n);
+ return ret;
+ }
+
+ /**
+ * Make store aligned when copy size exceeds 512 bytes
+ */
+ dstofss = ((uintptr_t)dst & 0x3F);
+ if (dstofss > 0) {
+ dstofss = 64 - dstofss;
+ n -= dstofss;
+ rte_mov64((uint8_t *)dst, (const uint8_t *)src);
+ src = (const uint8_t *)src + dstofss;
+ dst = (uint8_t *)dst + dstofss;
+ }
+
+ /**
+ * Copy 512-byte blocks.
+ * Use copy block function for better instruction order control,
+ * which is important when load is unaligned.
+ */
+ rte_mov512blocks((uint8_t *)dst, (const uint8_t *)src, n);
+ bits = n;
+ n = n & 511;
+ bits -= n;
+ src = (const uint8_t *)src + bits;
+ dst = (uint8_t *)dst + bits;
+
+ /**
+ * Copy 128-byte blocks.
+ * Use copy block function for better instruction order control,
+ * which is important when load is unaligned.
+ */
+ if (n >= 128) {
+ rte_mov128blocks((uint8_t *)dst, (const uint8_t *)src, n);
+ bits = n;
+ n = n & 127;
+ bits -= n;
+ src = (const uint8_t *)src + bits;
+ dst = (uint8_t *)dst + bits;
+ }
+
+ /**
+ * Copy whatever left
+ */
+ goto COPY_BLOCK_128_BACK63;
+}
+
+#elif defined RTE_MACHINE_CPUFLAG_AVX2
+
+/**
+ * AVX2 implementation below
+ */
+
+/**
+ * Copy 16 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov16(uint8_t *dst, const uint8_t *src)
+{
+ __m128i xmm0;
+
+ xmm0 = _mm_loadu_si128((const __m128i *)src);
+ _mm_storeu_si128((__m128i *)dst, xmm0);
+}
+
+/**
+ * Copy 32 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov32(uint8_t *dst, const uint8_t *src)
+{
+ __m256i ymm0;
+
+ ymm0 = _mm256_loadu_si256((const __m256i *)src);
+ _mm256_storeu_si256((__m256i *)dst, ymm0);
+}
+
+/**
+ * Copy 64 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov64(uint8_t *dst, const uint8_t *src)
+{
+ rte_mov32((uint8_t *)dst + 0 * 32, (const uint8_t *)src + 0 * 32);
+ rte_mov32((uint8_t *)dst + 1 * 32, (const uint8_t *)src + 1 * 32);
+}
+
+/**
+ * Copy 128 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov128(uint8_t *dst, const uint8_t *src)
+{
+ rte_mov32((uint8_t *)dst + 0 * 32, (const uint8_t *)src + 0 * 32);
+ rte_mov32((uint8_t *)dst + 1 * 32, (const uint8_t *)src + 1 * 32);
+ rte_mov32((uint8_t *)dst + 2 * 32, (const uint8_t *)src + 2 * 32);
+ rte_mov32((uint8_t *)dst + 3 * 32, (const uint8_t *)src + 3 * 32);
+}
+
+/**
+ * Copy 256 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov256(uint8_t *dst, const uint8_t *src)
+{
+ rte_mov32((uint8_t *)dst + 0 * 32, (const uint8_t *)src + 0 * 32);
+ rte_mov32((uint8_t *)dst + 1 * 32, (const uint8_t *)src + 1 * 32);
+ rte_mov32((uint8_t *)dst + 2 * 32, (const uint8_t *)src + 2 * 32);
+ rte_mov32((uint8_t *)dst + 3 * 32, (const uint8_t *)src + 3 * 32);
+ rte_mov32((uint8_t *)dst + 4 * 32, (const uint8_t *)src + 4 * 32);
+ rte_mov32((uint8_t *)dst + 5 * 32, (const uint8_t *)src + 5 * 32);
+ rte_mov32((uint8_t *)dst + 6 * 32, (const uint8_t *)src + 6 * 32);
+ rte_mov32((uint8_t *)dst + 7 * 32, (const uint8_t *)src + 7 * 32);
+}
+
+/**
+ * Copy 64-byte blocks from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov64blocks(uint8_t *dst, const uint8_t *src, size_t n)
+{
+ __m256i ymm0, ymm1;
+
+ while (n >= 64) {
+ ymm0 = _mm256_loadu_si256((const __m256i *)((const uint8_t *)src + 0 * 32));
+ n -= 64;
+ ymm1 = _mm256_loadu_si256((const __m256i *)((const uint8_t *)src + 1 * 32));
+ src = (const uint8_t *)src + 64;
+ _mm256_storeu_si256((__m256i *)((uint8_t *)dst + 0 * 32), ymm0);
+ _mm256_storeu_si256((__m256i *)((uint8_t *)dst + 1 * 32), ymm1);
+ dst = (uint8_t *)dst + 64;
+ }
+}
+
+/**
+ * Copy 256-byte blocks from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov256blocks(uint8_t *dst, const uint8_t *src, size_t n)
+{
+ __m256i ymm0, ymm1, ymm2, ymm3, ymm4, ymm5, ymm6, ymm7;
+
+ while (n >= 256) {
+ ymm0 = _mm256_loadu_si256((const __m256i *)((const uint8_t *)src + 0 * 32));
+ n -= 256;
+ ymm1 = _mm256_loadu_si256((const __m256i *)((const uint8_t *)src + 1 * 32));
+ ymm2 = _mm256_loadu_si256((const __m256i *)((const uint8_t *)src + 2 * 32));
+ ymm3 = _mm256_loadu_si256((const __m256i *)((const uint8_t *)src + 3 * 32));
+ ymm4 = _mm256_loadu_si256((const __m256i *)((const uint8_t *)src + 4 * 32));
+ ymm5 = _mm256_loadu_si256((const __m256i *)((const uint8_t *)src + 5 * 32));
+ ymm6 = _mm256_loadu_si256((const __m256i *)((const uint8_t *)src + 6 * 32));
+ ymm7 = _mm256_loadu_si256((const __m256i *)((const uint8_t *)src + 7 * 32));
+ src = (const uint8_t *)src + 256;
+ _mm256_storeu_si256((__m256i *)((uint8_t *)dst + 0 * 32), ymm0);
+ _mm256_storeu_si256((__m256i *)((uint8_t *)dst + 1 * 32), ymm1);
+ _mm256_storeu_si256((__m256i *)((uint8_t *)dst + 2 * 32), ymm2);
+ _mm256_storeu_si256((__m256i *)((uint8_t *)dst + 3 * 32), ymm3);
+ _mm256_storeu_si256((__m256i *)((uint8_t *)dst + 4 * 32), ymm4);
+ _mm256_storeu_si256((__m256i *)((uint8_t *)dst + 5 * 32), ymm5);
+ _mm256_storeu_si256((__m256i *)((uint8_t *)dst + 6 * 32), ymm6);
+ _mm256_storeu_si256((__m256i *)((uint8_t *)dst + 7 * 32), ymm7);
+ dst = (uint8_t *)dst + 256;
+ }
+}
+
+static inline void *
+rte_memcpy(void *dst, const void *src, size_t n)
+{
+ uintptr_t dstu = (uintptr_t)dst;
+ uintptr_t srcu = (uintptr_t)src;
+ void *ret = dst;
+ size_t dstofss;
+ size_t bits;
+
+ /**
+ * Copy less than 16 bytes
+ */
+ if (n < 16) {
+ if (n & 0x01) {
+ *(uint8_t *)dstu = *(const uint8_t *)srcu;
+ srcu = (uintptr_t)((const uint8_t *)srcu + 1);
+ dstu = (uintptr_t)((uint8_t *)dstu + 1);
+ }
+ if (n & 0x02) {
+ *(uint16_t *)dstu = *(const uint16_t *)srcu;
+ srcu = (uintptr_t)((const uint16_t *)srcu + 1);
+ dstu = (uintptr_t)((uint16_t *)dstu + 1);
+ }
+ if (n & 0x04) {
+ *(uint32_t *)dstu = *(const uint32_t *)srcu;
+ srcu = (uintptr_t)((const uint32_t *)srcu + 1);
+ dstu = (uintptr_t)((uint32_t *)dstu + 1);
+ }
+ if (n & 0x08) {
+ *(uint64_t *)dstu = *(const uint64_t *)srcu;
+ }
+ return ret;
+ }
+
+ /**
+ * Fast way when copy size doesn't exceed 512 bytes
+ */
+ if (n <= 32) {
+ rte_mov16((uint8_t *)dst, (const uint8_t *)src);
+ rte_mov16((uint8_t *)dst - 16 + n, (const uint8_t *)src - 16 + n);
+ return ret;
+ }
+ if (n <= 64) {
+ rte_mov32((uint8_t *)dst, (const uint8_t *)src);
+ rte_mov32((uint8_t *)dst - 32 + n, (const uint8_t *)src - 32 + n);
+ return ret;
+ }
+ if (n <= 512) {
+ if (n >= 256) {
+ n -= 256;
+ rte_mov256((uint8_t *)dst, (const uint8_t *)src);
+ src = (const uint8_t *)src + 256;
+ dst = (uint8_t *)dst + 256;
+ }
+ if (n >= 128) {
+ n -= 128;
+ rte_mov128((uint8_t *)dst, (const uint8_t *)src);
+ src = (const uint8_t *)src + 128;
+ dst = (uint8_t *)dst + 128;
+ }
+ if (n >= 64) {
+ n -= 64;
+ rte_mov64((uint8_t *)dst, (const uint8_t *)src);
+ src = (const uint8_t *)src + 64;
+ dst = (uint8_t *)dst + 64;
+ }
+COPY_BLOCK_64_BACK31:
+ if (n > 32) {
+ rte_mov32((uint8_t *)dst, (const uint8_t *)src);
+ rte_mov32((uint8_t *)dst - 32 + n, (const uint8_t *)src - 32 + n);
+ return ret;
+ }
+ if (n > 0) {
+ rte_mov32((uint8_t *)dst - 32 + n, (const uint8_t *)src - 32 + n);
+ }
+ return ret;
+ }
+
+ /**
+ * Make store aligned when copy size exceeds 512 bytes
+ */
+ dstofss = (uintptr_t)dst & 0x1F;
+ if (dstofss > 0) {
+ dstofss = 32 - dstofss;
+ n -= dstofss;
+ rte_mov32((uint8_t *)dst, (const uint8_t *)src);
+ src = (const uint8_t *)src + dstofss;
+ dst = (uint8_t *)dst + dstofss;
+ }
+
+ /**
+ * Copy 256-byte blocks.
+ * Use copy block function for better instruction order control,
+ * which is important when load is unaligned.
+ */
+ rte_mov256blocks((uint8_t *)dst, (const uint8_t *)src, n);
+ bits = n;
+ n = n & 255;
+ bits -= n;
+ src = (const uint8_t *)src + bits;
+ dst = (uint8_t *)dst + bits;
+
+ /**
+ * Copy 64-byte blocks.
+ * Use copy block function for better instruction order control,
+ * which is important when load is unaligned.
+ */
+ if (n >= 64) {
+ rte_mov64blocks((uint8_t *)dst, (const uint8_t *)src, n);
+ bits = n;
+ n = n & 63;
+ bits -= n;
+ src = (const uint8_t *)src + bits;
+ dst = (uint8_t *)dst + bits;
+ }
+
+ /**
+ * Copy whatever left
+ */
+ goto COPY_BLOCK_64_BACK31;
+}
+
+#else /* RTE_MACHINE_CPUFLAG */
+
+/**
+ * SSE & AVX implementation below
+ */
+
+/**
+ * Copy 16 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov16(uint8_t *dst, const uint8_t *src)
+{
+ __m128i xmm0;
+
+ xmm0 = _mm_loadu_si128((const __m128i *)(const __m128i *)src);
+ _mm_storeu_si128((__m128i *)dst, xmm0);
+}
+
+/**
+ * Copy 32 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov32(uint8_t *dst, const uint8_t *src)
+{
+ rte_mov16((uint8_t *)dst + 0 * 16, (const uint8_t *)src + 0 * 16);
+ rte_mov16((uint8_t *)dst + 1 * 16, (const uint8_t *)src + 1 * 16);
+}
+
+/**
+ * Copy 64 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov64(uint8_t *dst, const uint8_t *src)
+{
+ rte_mov16((uint8_t *)dst + 0 * 16, (const uint8_t *)src + 0 * 16);
+ rte_mov16((uint8_t *)dst + 1 * 16, (const uint8_t *)src + 1 * 16);
+ rte_mov16((uint8_t *)dst + 2 * 16, (const uint8_t *)src + 2 * 16);
+ rte_mov16((uint8_t *)dst + 3 * 16, (const uint8_t *)src + 3 * 16);
+}
+
+/**
+ * Copy 128 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov128(uint8_t *dst, const uint8_t *src)
+{
+ rte_mov16((uint8_t *)dst + 0 * 16, (const uint8_t *)src + 0 * 16);
+ rte_mov16((uint8_t *)dst + 1 * 16, (const uint8_t *)src + 1 * 16);
+ rte_mov16((uint8_t *)dst + 2 * 16, (const uint8_t *)src + 2 * 16);
+ rte_mov16((uint8_t *)dst + 3 * 16, (const uint8_t *)src + 3 * 16);
+ rte_mov16((uint8_t *)dst + 4 * 16, (const uint8_t *)src + 4 * 16);
+ rte_mov16((uint8_t *)dst + 5 * 16, (const uint8_t *)src + 5 * 16);
+ rte_mov16((uint8_t *)dst + 6 * 16, (const uint8_t *)src + 6 * 16);
+ rte_mov16((uint8_t *)dst + 7 * 16, (const uint8_t *)src + 7 * 16);
+}
+
+/**
+ * Copy 256 bytes from one location to another,
+ * locations should not overlap.
+ */
+static inline void
+rte_mov256(uint8_t *dst, const uint8_t *src)
+{
+ rte_mov16((uint8_t *)dst + 0 * 16, (const uint8_t *)src + 0 * 16);
+ rte_mov16((uint8_t *)dst + 1 * 16, (const uint8_t *)src + 1 * 16);
+ rte_mov16((uint8_t *)dst + 2 * 16, (const uint8_t *)src + 2 * 16);
+ rte_mov16((uint8_t *)dst + 3 * 16, (const uint8_t *)src + 3 * 16);
+ rte_mov16((uint8_t *)dst + 4 * 16, (const uint8_t *)src + 4 * 16);
+ rte_mov16((uint8_t *)dst + 5 * 16, (const uint8_t *)src + 5 * 16);
+ rte_mov16((uint8_t *)dst + 6 * 16, (const uint8_t *)src + 6 * 16);
+ rte_mov16((uint8_t *)dst + 7 * 16, (const uint8_t *)src + 7 * 16);
+ rte_mov16((uint8_t *)dst + 8 * 16, (const uint8_t *)src + 8 * 16);
+ rte_mov16((uint8_t *)dst + 9 * 16, (const uint8_t *)src + 9 * 16);
+ rte_mov16((uint8_t *)dst + 10 * 16, (const uint8_t *)src + 10 * 16);
+ rte_mov16((uint8_t *)dst + 11 * 16, (const uint8_t *)src + 11 * 16);
+ rte_mov16((uint8_t *)dst + 12 * 16, (const uint8_t *)src + 12 * 16);
+ rte_mov16((uint8_t *)dst + 13 * 16, (const uint8_t *)src + 13 * 16);
+ rte_mov16((uint8_t *)dst + 14 * 16, (const uint8_t *)src + 14 * 16);
+ rte_mov16((uint8_t *)dst + 15 * 16, (const uint8_t *)src + 15 * 16);
+}
+
+/**
+ * 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 MOVEUNALIGNED_LEFT47_IMM(dst, src, len, offset) \
+({ \
+ int tmp; \
+ while (len >= 128 + 16 - offset) { \
+ xmm0 = _mm_loadu_si128((const __m128i *)((const uint8_t *)src - offset + 0 * 16)); \
+ len -= 128; \
+ xmm1 = _mm_loadu_si128((const __m128i *)((const uint8_t *)src - offset + 1 * 16)); \
+ xmm2 = _mm_loadu_si128((const __m128i *)((const uint8_t *)src - offset + 2 * 16)); \
+ xmm3 = _mm_loadu_si128((const __m128i *)((const uint8_t *)src - offset + 3 * 16)); \
+ xmm4 = _mm_loadu_si128((const __m128i *)((const uint8_t *)src - offset + 4 * 16)); \
+ xmm5 = _mm_loadu_si128((const __m128i *)((const uint8_t *)src - offset + 5 * 16)); \
+ xmm6 = _mm_loadu_si128((const __m128i *)((const uint8_t *)src - offset + 6 * 16)); \
+ xmm7 = _mm_loadu_si128((const __m128i *)((const uint8_t *)src - offset + 7 * 16)); \
+ xmm8 = _mm_loadu_si128((const __m128i *)((const uint8_t *)src - offset + 8 * 16)); \
+ src = (const uint8_t *)src + 128; \
+ _mm_storeu_si128((__m128i *)((uint8_t *)dst + 0 * 16), _mm_alignr_epi8(xmm1, xmm0, offset)); \
+ _mm_storeu_si128((__m128i *)((uint8_t *)dst + 1 * 16), _mm_alignr_epi8(xmm2, xmm1, offset)); \
+ _mm_storeu_si128((__m128i *)((uint8_t *)dst + 2 * 16), _mm_alignr_epi8(xmm3, xmm2, offset)); \
+ _mm_storeu_si128((__m128i *)((uint8_t *)dst + 3 * 16), _mm_alignr_epi8(xmm4, xmm3, offset)); \
+ _mm_storeu_si128((__m128i *)((uint8_t *)dst + 4 * 16), _mm_alignr_epi8(xmm5, xmm4, offset)); \
+ _mm_storeu_si128((__m128i *)((uint8_t *)dst + 5 * 16), _mm_alignr_epi8(xmm6, xmm5, offset)); \
+ _mm_storeu_si128((__m128i *)((uint8_t *)dst + 6 * 16), _mm_alignr_epi8(xmm7, xmm6, offset)); \
+ _mm_storeu_si128((__m128i *)((uint8_t *)dst + 7 * 16), _mm_alignr_epi8(xmm8, xmm7, offset)); \
+ dst = (uint8_t *)dst + 128; \
+ } \
+ tmp = len; \
+ len = ((len - 16 + offset) & 127) + 16 - offset; \
+ tmp -= len; \
+ src = (const uint8_t *)src + tmp; \
+ dst = (uint8_t *)dst + tmp; \
+ if (len >= 32 + 16 - offset) { \
+ while (len >= 32 + 16 - offset) { \
+ xmm0 = _mm_loadu_si128((const __m128i *)((const uint8_t *)src - offset + 0 * 16)); \
+ len -= 32; \
+ xmm1 = _mm_loadu_si128((const __m128i *)((const uint8_t *)src - offset + 1 * 16)); \
+ xmm2 = _mm_loadu_si128((const __m128i *)((const uint8_t *)src - offset + 2 * 16)); \
+ src = (const uint8_t *)src + 32; \
+ _mm_storeu_si128((__m128i *)((uint8_t *)dst + 0 * 16), _mm_alignr_epi8(xmm1, xmm0, offset)); \
+ _mm_storeu_si128((__m128i *)((uint8_t *)dst + 1 * 16), _mm_alignr_epi8(xmm2, xmm1, offset)); \
+ dst = (uint8_t *)dst + 32; \
+ } \
+ tmp = len; \
+ len = ((len - 16 + offset) & 31) + 16 - offset; \
+ tmp -= len; \
+ src = (const uint8_t *)src + tmp; \
+ dst = (uint8_t *)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 MOVEUNALIGNED_LEFT47_IMM must be pre-defined
+ */
+#define MOVEUNALIGNED_LEFT47(dst, src, len, offset) \
+({ \
+ switch (offset) { \
+ case 0x01: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x01); break; \
+ case 0x02: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x02); break; \
+ case 0x03: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x03); break; \
+ case 0x04: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x04); break; \
+ case 0x05: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x05); break; \
+ case 0x06: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x06); break; \
+ case 0x07: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x07); break; \
+ case 0x08: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x08); break; \
+ case 0x09: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x09); break; \
+ case 0x0A: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x0A); break; \
+ case 0x0B: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x0B); break; \
+ case 0x0C: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x0C); break; \
+ case 0x0D: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x0D); break; \
+ case 0x0E: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x0E); break; \
+ case 0x0F: MOVEUNALIGNED_LEFT47_IMM(dst, src, n, 0x0F); break; \
+ default:; \
+ } \
+})
+
+static inline void *
+rte_memcpy(void *dst, const void *src, size_t n)
+{
+ __m128i xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7, xmm8;
+ uintptr_t dstu = (uintptr_t)dst;
+ uintptr_t srcu = (uintptr_t)src;
+ void *ret = dst;
+ size_t dstofss;
+ size_t srcofs;
+
+ /**
+ * Copy less than 16 bytes
+ */
+ if (n < 16) {
+ if (n & 0x01) {
+ *(uint8_t *)dstu = *(const uint8_t *)srcu;
+ srcu = (uintptr_t)((const uint8_t *)srcu + 1);
+ dstu = (uintptr_t)((uint8_t *)dstu + 1);
+ }
+ if (n & 0x02) {
+ *(uint16_t *)dstu = *(const uint16_t *)srcu;
+ srcu = (uintptr_t)((const uint16_t *)srcu + 1);
+ dstu = (uintptr_t)((uint16_t *)dstu + 1);
+ }
+ if (n & 0x04) {
+ *(uint32_t *)dstu = *(const uint32_t *)srcu;
+ srcu = (uintptr_t)((const uint32_t *)srcu + 1);
+ dstu = (uintptr_t)((uint32_t *)dstu + 1);
+ }
+ if (n & 0x08) {
+ *(uint64_t *)dstu = *(const uint64_t *)srcu;
+ }
+ return ret;
+ }
+
+ /**
+ * Fast way when copy size doesn't exceed 512 bytes
+ */
+ if (n <= 32) {
+ rte_mov16((uint8_t *)dst, (const uint8_t *)src);
+ rte_mov16((uint8_t *)dst - 16 + n, (const uint8_t *)src - 16 + n);
+ return ret;
+ }
+ if (n <= 48) {
+ rte_mov32((uint8_t *)dst, (const uint8_t *)src);
+ rte_mov16((uint8_t *)dst - 16 + n, (const uint8_t *)src - 16 + n);
+ return ret;
+ }
+ if (n <= 64) {
+ rte_mov32((uint8_t *)dst, (const uint8_t *)src);
+ rte_mov16((uint8_t *)dst + 32, (const uint8_t *)src + 32);
+ rte_mov16((uint8_t *)dst - 16 + n, (const uint8_t *)src - 16 + n);
+ return ret;
+ }
+ if (n <= 128) {
+ goto COPY_BLOCK_128_BACK15;
+ }
+ if (n <= 512) {
+ if (n >= 256) {
+ n -= 256;
+ rte_mov128((uint8_t *)dst, (const uint8_t *)src);
+ rte_mov128((uint8_t *)dst + 128, (const uint8_t *)src + 128);
+ src = (const uint8_t *)src + 256;
+ dst = (uint8_t *)dst + 256;
+ }
+COPY_BLOCK_255_BACK15:
+ if (n >= 128) {
+ n -= 128;
+ rte_mov128((uint8_t *)dst, (const uint8_t *)src);
+ src = (const uint8_t *)src + 128;
+ dst = (uint8_t *)dst + 128;
+ }
+COPY_BLOCK_128_BACK15:
+ if (n >= 64) {
+ n -= 64;
+ rte_mov64((uint8_t *)dst, (const uint8_t *)src);
+ src = (const uint8_t *)src + 64;
+ dst = (uint8_t *)dst + 64;
+ }
+COPY_BLOCK_64_BACK15:
+ if (n >= 32) {
+ n -= 32;
+ rte_mov32((uint8_t *)dst, (const uint8_t *)src);
+ src = (const uint8_t *)src + 32;
+ dst = (uint8_t *)dst + 32;
+ }
+ if (n > 16) {
+ rte_mov16((uint8_t *)dst, (const uint8_t *)src);
+ rte_mov16((uint8_t *)dst - 16 + n, (const uint8_t *)src - 16 + n);
+ return ret;
+ }
+ if (n > 0) {
+ rte_mov16((uint8_t *)dst - 16 + n, (const uint8_t *)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 = (uintptr_t)dst & 0x0F;
+ if (dstofss > 0) {
+ dstofss = 16 - dstofss + 16;
+ n -= dstofss;
+ rte_mov32((uint8_t *)dst, (const uint8_t *)src);
+ src = (const uint8_t *)src + dstofss;
+ dst = (uint8_t *)dst + dstofss;
+ }
+ srcofs = ((uintptr_t)src & 0x0F);
+
+ /**
+ * For aligned copy
+ */
+ if (srcofs == 0) {
+ /**
+ * Copy 256-byte blocks
+ */
+ for (; n >= 256; n -= 256) {
+ rte_mov256((uint8_t *)dst, (const uint8_t *)src);
+ dst = (uint8_t *)dst + 256;
+ src = (const uint8_t *)src + 256;
+ }
+
+ /**
+ * Copy whatever left
+ */
+ goto COPY_BLOCK_255_BACK15;
+ }
+
+ /**
+ * For copy with unaligned load
+ */
+ MOVEUNALIGNED_LEFT47(dst, src, n, srcofs);
+
+ /**
+ * Copy whatever left
+ */
+ goto COPY_BLOCK_64_BACK15;
+}
+
+#endif /* RTE_MACHINE_CPUFLAG */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_MEMCPY_X86_64_H_ */
Code Review / deb_dpdk.git / blobdiff