[dpdk-dev] [PATCH 1/5] eal: split arm rte_memcpy.h into 32-bit and 64-bit versions

David Hunt david.hunt at intel.com
Thu Oct 29 18:29:50 CET 2015


Signed-off-by: David Hunt <david.hunt at intel.com>
---
 .../common/include/arch/arm/rte_memcpy.h           | 302 +------------------
 .../common/include/arch/arm/rte_memcpy_32.h        | 334 +++++++++++++++++++++
 .../common/include/arch/arm/rte_memcpy_64.h        | 308 +++++++++++++++++++
 3 files changed, 647 insertions(+), 297 deletions(-)
 create mode 100644 lib/librte_eal/common/include/arch/arm/rte_memcpy_32.h
 create mode 100644 lib/librte_eal/common/include/arch/arm/rte_memcpy_64.h

diff --git a/lib/librte_eal/common/include/arch/arm/rte_memcpy.h b/lib/librte_eal/common/include/arch/arm/rte_memcpy.h
index f41648a..19c98e1 100644
--- a/lib/librte_eal/common/include/arch/arm/rte_memcpy.h
+++ b/lib/librte_eal/common/include/arch/arm/rte_memcpy.h
@@ -1,7 +1,7 @@
 /*
  *   BSD LICENSE
  *
- *   Copyright(c) 2015 RehiveTech. All rights reserved.
+ *   Copyright(c) 2015 Intel Corporation. All rights reserved.
  *
  *   Redistribution and use in source and binary forms, with or without
  *   modification, are permitted provided that the following conditions
@@ -13,7 +13,7 @@
  *       notice, this list of conditions and the following disclaimer in
  *       the documentation and/or other materials provided with the
  *       distribution.
- *     * Neither the name of RehiveTech nor the names of its
+ *     * Neither the name of Intel Corportation nor the names of its
  *       contributors may be used to endorse or promote products derived
  *       from this software without specific prior written permission.
  *
@@ -33,302 +33,10 @@
 #ifndef _RTE_MEMCPY_ARM_H_
 #define _RTE_MEMCPY_ARM_H_
 
-#include <stdint.h>
-#include <string.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#include "generic/rte_memcpy.h"
-
-#ifdef __ARM_NEON_FP
-
-/* ARM NEON Intrinsics are used to copy data */
-#include <arm_neon.h>
-
-static inline void
-rte_mov16(uint8_t *dst, const uint8_t *src)
-{
-	vst1q_u8(dst, vld1q_u8(src));
-}
-
-static inline void
-rte_mov32(uint8_t *dst, const uint8_t *src)
-{
-	asm volatile (
-		"vld1.8 {d0-d3}, [%0]\n\t"
-		"vst1.8 {d0-d3}, [%1]\n\t"
-		: "+r" (src), "+r" (dst)
-		: : "memory", "d0", "d1", "d2", "d3");
-}
-
-static inline void
-rte_mov48(uint8_t *dst, const uint8_t *src)
-{
-	asm volatile (
-		"vld1.8 {d0-d3}, [%0]!\n\t"
-		"vld1.8 {d4-d5}, [%0]\n\t"
-		"vst1.8 {d0-d3}, [%1]!\n\t"
-		"vst1.8 {d4-d5}, [%1]\n\t"
-		: "+r" (src), "+r" (dst)
-		:
-		: "memory", "d0", "d1", "d2", "d3", "d4", "d5");
-}
-
-static inline void
-rte_mov64(uint8_t *dst, const uint8_t *src)
-{
-	asm volatile (
-		"vld1.8 {d0-d3}, [%0]!\n\t"
-		"vld1.8 {d4-d7}, [%0]\n\t"
-		"vst1.8 {d0-d3}, [%1]!\n\t"
-		"vst1.8 {d4-d7}, [%1]\n\t"
-		: "+r" (src), "+r" (dst)
-		:
-		: "memory", "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7");
-}
-
-static inline void
-rte_mov128(uint8_t *dst, const uint8_t *src)
-{
-	asm volatile ("pld [%0, #64]" : : "r" (src));
-	asm volatile (
-		"vld1.8 {d0-d3},   [%0]!\n\t"
-		"vld1.8 {d4-d7},   [%0]!\n\t"
-		"vld1.8 {d8-d11},  [%0]!\n\t"
-		"vld1.8 {d12-d15}, [%0]\n\t"
-		"vst1.8 {d0-d3},   [%1]!\n\t"
-		"vst1.8 {d4-d7},   [%1]!\n\t"
-		"vst1.8 {d8-d11},  [%1]!\n\t"
-		"vst1.8 {d12-d15}, [%1]\n\t"
-		: "+r" (src), "+r" (dst)
-		:
-		: "memory", "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",
-		"d8", "d9", "d10", "d11", "d12", "d13", "d14", "d15");
-}
-
-static inline void
-rte_mov256(uint8_t *dst, const uint8_t *src)
-{
-	asm volatile ("pld [%0,  #64]" : : "r" (src));
-	asm volatile ("pld [%0, #128]" : : "r" (src));
-	asm volatile ("pld [%0, #192]" : : "r" (src));
-	asm volatile ("pld [%0, #256]" : : "r" (src));
-	asm volatile ("pld [%0, #320]" : : "r" (src));
-	asm volatile ("pld [%0, #384]" : : "r" (src));
-	asm volatile ("pld [%0, #448]" : : "r" (src));
-	asm volatile (
-		"vld1.8 {d0-d3},   [%0]!\n\t"
-		"vld1.8 {d4-d7},   [%0]!\n\t"
-		"vld1.8 {d8-d11},  [%0]!\n\t"
-		"vld1.8 {d12-d15}, [%0]!\n\t"
-		"vld1.8 {d16-d19}, [%0]!\n\t"
-		"vld1.8 {d20-d23}, [%0]!\n\t"
-		"vld1.8 {d24-d27}, [%0]!\n\t"
-		"vld1.8 {d28-d31}, [%0]\n\t"
-		"vst1.8 {d0-d3},   [%1]!\n\t"
-		"vst1.8 {d4-d7},   [%1]!\n\t"
-		"vst1.8 {d8-d11},  [%1]!\n\t"
-		"vst1.8 {d12-d15}, [%1]!\n\t"
-		"vst1.8 {d16-d19}, [%1]!\n\t"
-		"vst1.8 {d20-d23}, [%1]!\n\t"
-		"vst1.8 {d24-d27}, [%1]!\n\t"
-		"vst1.8 {d28-d31}, [%1]!\n\t"
-		: "+r" (src), "+r" (dst)
-		:
-		: "memory", "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",
-		"d8", "d9", "d10", "d11", "d12", "d13", "d14", "d15",
-		"d16", "d17", "d18", "d19", "d20", "d21", "d22", "d23",
-		"d24", "d25", "d26", "d27", "d28", "d29", "d30", "d31");
-}
-
-#define rte_memcpy(dst, src, n)              \
-	({ (__builtin_constant_p(n)) ?       \
-	memcpy((dst), (src), (n)) :          \
-	rte_memcpy_func((dst), (src), (n)); })
-
-static inline void *
-rte_memcpy_func(void *dst, const void *src, size_t n)
-{
-	void *ret = dst;
-
-	/* We can't copy < 16 bytes using XMM registers so do it manually. */
-	if (n < 16) {
-		if (n & 0x01) {
-			*(uint8_t *)dst = *(const uint8_t *)src;
-			dst = (uint8_t *)dst + 1;
-			src = (const uint8_t *)src + 1;
-		}
-		if (n & 0x02) {
-			*(uint16_t *)dst = *(const uint16_t *)src;
-			dst = (uint16_t *)dst + 1;
-			src = (const uint16_t *)src + 1;
-		}
-		if (n & 0x04) {
-			*(uint32_t *)dst = *(const uint32_t *)src;
-			dst = (uint32_t *)dst + 1;
-			src = (const uint32_t *)src + 1;
-		}
-		if (n & 0x08) {
-			/* ARMv7 can not handle unaligned access to long long
-			 * (uint64_t). Therefore two uint32_t operations are
-			 * used.
-			 */
-			*(uint32_t *)dst = *(const uint32_t *)src;
-			dst = (uint32_t *)dst + 1;
-			src = (const uint32_t *)src + 1;
-			*(uint32_t *)dst = *(const uint32_t *)src;
-		}
-		return ret;
-	}
-
-	/* Special fast cases for <= 128 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 <= 128) {
-		rte_mov64((uint8_t *)dst, (const uint8_t *)src);
-		rte_mov64((uint8_t *)dst - 64 + n,
-			(const uint8_t *)src - 64 + n);
-		return ret;
-	}
-
-	/*
-	 * For large copies > 128 bytes. This combination of 256, 64 and 16 byte
-	 * copies was found to be faster than doing 128 and 32 byte copies as
-	 * well.
-	 */
-	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;
-	}
-
-	/*
-	 * We split the remaining bytes (which will be less than 256) into
-	 * 64byte (2^6) chunks.
-	 * Using incrementing integers in the case labels of a switch statement
-	 * enourages the compiler to use a jump table. To get incrementing
-	 * integers, we shift the 2 relevant bits to the LSB position to first
-	 * get decrementing integers, and then subtract.
-	 */
-	switch (3 - (n >> 6)) {
-	case 0x00:
-		rte_mov64((uint8_t *)dst, (const uint8_t *)src);
-		n -= 64;
-		dst = (uint8_t *)dst + 64;
-		src = (const uint8_t *)src + 64;      /* fallthrough */
-	case 0x01:
-		rte_mov64((uint8_t *)dst, (const uint8_t *)src);
-		n -= 64;
-		dst = (uint8_t *)dst + 64;
-		src = (const uint8_t *)src + 64;      /* fallthrough */
-	case 0x02:
-		rte_mov64((uint8_t *)dst, (const uint8_t *)src);
-		n -= 64;
-		dst = (uint8_t *)dst + 64;
-		src = (const uint8_t *)src + 64;      /* fallthrough */
-	default:
-		break;
-	}
-
-	/*
-	 * We split the remaining bytes (which will be less than 64) into
-	 * 16byte (2^4) chunks, using the same switch structure as above.
-	 */
-	switch (3 - (n >> 4)) {
-	case 0x00:
-		rte_mov16((uint8_t *)dst, (const uint8_t *)src);
-		n -= 16;
-		dst = (uint8_t *)dst + 16;
-		src = (const uint8_t *)src + 16;      /* fallthrough */
-	case 0x01:
-		rte_mov16((uint8_t *)dst, (const uint8_t *)src);
-		n -= 16;
-		dst = (uint8_t *)dst + 16;
-		src = (const uint8_t *)src + 16;      /* fallthrough */
-	case 0x02:
-		rte_mov16((uint8_t *)dst, (const uint8_t *)src);
-		n -= 16;
-		dst = (uint8_t *)dst + 16;
-		src = (const uint8_t *)src + 16;      /* fallthrough */
-	default:
-		break;
-	}
-
-	/* Copy any remaining bytes, without going beyond end of buffers */
-	if (n != 0)
-		rte_mov16((uint8_t *)dst - 16 + n,
-			(const uint8_t *)src - 16 + n);
-	return ret;
-}
-
+#ifdef RTE_ARCH_64
+#include "rte_memcpy_64.h"
 #else
-
-static inline void
-rte_mov16(uint8_t *dst, const uint8_t *src)
-{
-	memcpy(dst, src, 16);
-}
-
-static inline void
-rte_mov32(uint8_t *dst, const uint8_t *src)
-{
-	memcpy(dst, src, 32);
-}
-
-static inline void
-rte_mov48(uint8_t *dst, const uint8_t *src)
-{
-	memcpy(dst, src, 48);
-}
-
-static inline void
-rte_mov64(uint8_t *dst, const uint8_t *src)
-{
-	memcpy(dst, src, 64);
-}
-
-static inline void
-rte_mov128(uint8_t *dst, const uint8_t *src)
-{
-	memcpy(dst, src, 128);
-}
-
-static inline void
-rte_mov256(uint8_t *dst, const uint8_t *src)
-{
-	memcpy(dst, src, 256);
-}
-
-static inline void *
-rte_memcpy(void *dst, const void *src, size_t n)
-{
-	return memcpy(dst, src, n);
-}
-
-static inline void *
-rte_memcpy_func(void *dst, const void *src, size_t n)
-{
-	return memcpy(dst, src, n);
-}
-
-#endif /* __ARM_NEON_FP */
-
-#ifdef __cplusplus
-}
+#include "rte_memcpy_32.h"
 #endif
 
 #endif /* _RTE_MEMCPY_ARM_H_ */
diff --git a/lib/librte_eal/common/include/arch/arm/rte_memcpy_32.h b/lib/librte_eal/common/include/arch/arm/rte_memcpy_32.h
new file mode 100644
index 0000000..f41648a
--- /dev/null
+++ b/lib/librte_eal/common/include/arch/arm/rte_memcpy_32.h
@@ -0,0 +1,334 @@
+/*
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 RehiveTech. 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 RehiveTech 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_ARM32_H_
+#define _RTE_MEMCPY_ARM32_H_
+
+#include <stdint.h>
+#include <string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "generic/rte_memcpy.h"
+
+#ifdef __ARM_NEON_FP
+
+/* ARM NEON Intrinsics are used to copy data */
+#include <arm_neon.h>
+
+static inline void
+rte_mov16(uint8_t *dst, const uint8_t *src)
+{
+	vst1q_u8(dst, vld1q_u8(src));
+}
+
+static inline void
+rte_mov32(uint8_t *dst, const uint8_t *src)
+{
+	asm volatile (
+		"vld1.8 {d0-d3}, [%0]\n\t"
+		"vst1.8 {d0-d3}, [%1]\n\t"
+		: "+r" (src), "+r" (dst)
+		: : "memory", "d0", "d1", "d2", "d3");
+}
+
+static inline void
+rte_mov48(uint8_t *dst, const uint8_t *src)
+{
+	asm volatile (
+		"vld1.8 {d0-d3}, [%0]!\n\t"
+		"vld1.8 {d4-d5}, [%0]\n\t"
+		"vst1.8 {d0-d3}, [%1]!\n\t"
+		"vst1.8 {d4-d5}, [%1]\n\t"
+		: "+r" (src), "+r" (dst)
+		:
+		: "memory", "d0", "d1", "d2", "d3", "d4", "d5");
+}
+
+static inline void
+rte_mov64(uint8_t *dst, const uint8_t *src)
+{
+	asm volatile (
+		"vld1.8 {d0-d3}, [%0]!\n\t"
+		"vld1.8 {d4-d7}, [%0]\n\t"
+		"vst1.8 {d0-d3}, [%1]!\n\t"
+		"vst1.8 {d4-d7}, [%1]\n\t"
+		: "+r" (src), "+r" (dst)
+		:
+		: "memory", "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7");
+}
+
+static inline void
+rte_mov128(uint8_t *dst, const uint8_t *src)
+{
+	asm volatile ("pld [%0, #64]" : : "r" (src));
+	asm volatile (
+		"vld1.8 {d0-d3},   [%0]!\n\t"
+		"vld1.8 {d4-d7},   [%0]!\n\t"
+		"vld1.8 {d8-d11},  [%0]!\n\t"
+		"vld1.8 {d12-d15}, [%0]\n\t"
+		"vst1.8 {d0-d3},   [%1]!\n\t"
+		"vst1.8 {d4-d7},   [%1]!\n\t"
+		"vst1.8 {d8-d11},  [%1]!\n\t"
+		"vst1.8 {d12-d15}, [%1]\n\t"
+		: "+r" (src), "+r" (dst)
+		:
+		: "memory", "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",
+		"d8", "d9", "d10", "d11", "d12", "d13", "d14", "d15");
+}
+
+static inline void
+rte_mov256(uint8_t *dst, const uint8_t *src)
+{
+	asm volatile ("pld [%0,  #64]" : : "r" (src));
+	asm volatile ("pld [%0, #128]" : : "r" (src));
+	asm volatile ("pld [%0, #192]" : : "r" (src));
+	asm volatile ("pld [%0, #256]" : : "r" (src));
+	asm volatile ("pld [%0, #320]" : : "r" (src));
+	asm volatile ("pld [%0, #384]" : : "r" (src));
+	asm volatile ("pld [%0, #448]" : : "r" (src));
+	asm volatile (
+		"vld1.8 {d0-d3},   [%0]!\n\t"
+		"vld1.8 {d4-d7},   [%0]!\n\t"
+		"vld1.8 {d8-d11},  [%0]!\n\t"
+		"vld1.8 {d12-d15}, [%0]!\n\t"
+		"vld1.8 {d16-d19}, [%0]!\n\t"
+		"vld1.8 {d20-d23}, [%0]!\n\t"
+		"vld1.8 {d24-d27}, [%0]!\n\t"
+		"vld1.8 {d28-d31}, [%0]\n\t"
+		"vst1.8 {d0-d3},   [%1]!\n\t"
+		"vst1.8 {d4-d7},   [%1]!\n\t"
+		"vst1.8 {d8-d11},  [%1]!\n\t"
+		"vst1.8 {d12-d15}, [%1]!\n\t"
+		"vst1.8 {d16-d19}, [%1]!\n\t"
+		"vst1.8 {d20-d23}, [%1]!\n\t"
+		"vst1.8 {d24-d27}, [%1]!\n\t"
+		"vst1.8 {d28-d31}, [%1]!\n\t"
+		: "+r" (src), "+r" (dst)
+		:
+		: "memory", "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7",
+		"d8", "d9", "d10", "d11", "d12", "d13", "d14", "d15",
+		"d16", "d17", "d18", "d19", "d20", "d21", "d22", "d23",
+		"d24", "d25", "d26", "d27", "d28", "d29", "d30", "d31");
+}
+
+#define rte_memcpy(dst, src, n)              \
+	({ (__builtin_constant_p(n)) ?       \
+	memcpy((dst), (src), (n)) :          \
+	rte_memcpy_func((dst), (src), (n)); })
+
+static inline void *
+rte_memcpy_func(void *dst, const void *src, size_t n)
+{
+	void *ret = dst;
+
+	/* We can't copy < 16 bytes using XMM registers so do it manually. */
+	if (n < 16) {
+		if (n & 0x01) {
+			*(uint8_t *)dst = *(const uint8_t *)src;
+			dst = (uint8_t *)dst + 1;
+			src = (const uint8_t *)src + 1;
+		}
+		if (n & 0x02) {
+			*(uint16_t *)dst = *(const uint16_t *)src;
+			dst = (uint16_t *)dst + 1;
+			src = (const uint16_t *)src + 1;
+		}
+		if (n & 0x04) {
+			*(uint32_t *)dst = *(const uint32_t *)src;
+			dst = (uint32_t *)dst + 1;
+			src = (const uint32_t *)src + 1;
+		}
+		if (n & 0x08) {
+			/* ARMv7 can not handle unaligned access to long long
+			 * (uint64_t). Therefore two uint32_t operations are
+			 * used.
+			 */
+			*(uint32_t *)dst = *(const uint32_t *)src;
+			dst = (uint32_t *)dst + 1;
+			src = (const uint32_t *)src + 1;
+			*(uint32_t *)dst = *(const uint32_t *)src;
+		}
+		return ret;
+	}
+
+	/* Special fast cases for <= 128 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 <= 128) {
+		rte_mov64((uint8_t *)dst, (const uint8_t *)src);
+		rte_mov64((uint8_t *)dst - 64 + n,
+			(const uint8_t *)src - 64 + n);
+		return ret;
+	}
+
+	/*
+	 * For large copies > 128 bytes. This combination of 256, 64 and 16 byte
+	 * copies was found to be faster than doing 128 and 32 byte copies as
+	 * well.
+	 */
+	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;
+	}
+
+	/*
+	 * We split the remaining bytes (which will be less than 256) into
+	 * 64byte (2^6) chunks.
+	 * Using incrementing integers in the case labels of a switch statement
+	 * enourages the compiler to use a jump table. To get incrementing
+	 * integers, we shift the 2 relevant bits to the LSB position to first
+	 * get decrementing integers, and then subtract.
+	 */
+	switch (3 - (n >> 6)) {
+	case 0x00:
+		rte_mov64((uint8_t *)dst, (const uint8_t *)src);
+		n -= 64;
+		dst = (uint8_t *)dst + 64;
+		src = (const uint8_t *)src + 64;      /* fallthrough */
+	case 0x01:
+		rte_mov64((uint8_t *)dst, (const uint8_t *)src);
+		n -= 64;
+		dst = (uint8_t *)dst + 64;
+		src = (const uint8_t *)src + 64;      /* fallthrough */
+	case 0x02:
+		rte_mov64((uint8_t *)dst, (const uint8_t *)src);
+		n -= 64;
+		dst = (uint8_t *)dst + 64;
+		src = (const uint8_t *)src + 64;      /* fallthrough */
+	default:
+		break;
+	}
+
+	/*
+	 * We split the remaining bytes (which will be less than 64) into
+	 * 16byte (2^4) chunks, using the same switch structure as above.
+	 */
+	switch (3 - (n >> 4)) {
+	case 0x00:
+		rte_mov16((uint8_t *)dst, (const uint8_t *)src);
+		n -= 16;
+		dst = (uint8_t *)dst + 16;
+		src = (const uint8_t *)src + 16;      /* fallthrough */
+	case 0x01:
+		rte_mov16((uint8_t *)dst, (const uint8_t *)src);
+		n -= 16;
+		dst = (uint8_t *)dst + 16;
+		src = (const uint8_t *)src + 16;      /* fallthrough */
+	case 0x02:
+		rte_mov16((uint8_t *)dst, (const uint8_t *)src);
+		n -= 16;
+		dst = (uint8_t *)dst + 16;
+		src = (const uint8_t *)src + 16;      /* fallthrough */
+	default:
+		break;
+	}
+
+	/* Copy any remaining bytes, without going beyond end of buffers */
+	if (n != 0)
+		rte_mov16((uint8_t *)dst - 16 + n,
+			(const uint8_t *)src - 16 + n);
+	return ret;
+}
+
+#else
+
+static inline void
+rte_mov16(uint8_t *dst, const uint8_t *src)
+{
+	memcpy(dst, src, 16);
+}
+
+static inline void
+rte_mov32(uint8_t *dst, const uint8_t *src)
+{
+	memcpy(dst, src, 32);
+}
+
+static inline void
+rte_mov48(uint8_t *dst, const uint8_t *src)
+{
+	memcpy(dst, src, 48);
+}
+
+static inline void
+rte_mov64(uint8_t *dst, const uint8_t *src)
+{
+	memcpy(dst, src, 64);
+}
+
+static inline void
+rte_mov128(uint8_t *dst, const uint8_t *src)
+{
+	memcpy(dst, src, 128);
+}
+
+static inline void
+rte_mov256(uint8_t *dst, const uint8_t *src)
+{
+	memcpy(dst, src, 256);
+}
+
+static inline void *
+rte_memcpy(void *dst, const void *src, size_t n)
+{
+	return memcpy(dst, src, n);
+}
+
+static inline void *
+rte_memcpy_func(void *dst, const void *src, size_t n)
+{
+	return memcpy(dst, src, n);
+}
+
+#endif /* __ARM_NEON_FP */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_MEMCPY_ARM32_H_ */
diff --git a/lib/librte_eal/common/include/arch/arm/rte_memcpy_64.h b/lib/librte_eal/common/include/arch/arm/rte_memcpy_64.h
new file mode 100644
index 0000000..6d85113
--- /dev/null
+++ b/lib/librte_eal/common/include/arch/arm/rte_memcpy_64.h
@@ -0,0 +1,308 @@
+/*
+ *   BSD LICENSE
+ *
+ *   Copyright (C) IBM Corporation 2014.
+ *
+ *   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 IBM 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_ARM_64_H_
+#define _RTE_MEMCPY_ARM_64_H_
+
+#include <stdint.h>
+#include <string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "generic/rte_memcpy.h"
+
+#ifdef __ARM_NEON_FP
+
+/* ARM NEON Intrinsics are used to copy data */
+#include <arm_neon.h>
+
+static inline void
+rte_mov16(uint8_t *dst, const uint8_t *src)
+{
+	asm volatile("LDP d0, d1, [%0]\n\t"
+		     "STP d0, d1, [%1]\n\t"
+		     : : "r" (src), "r" (dst) :
+	);
+}
+
+static inline void
+rte_mov32(uint8_t *dst, const uint8_t *src)
+{
+	asm volatile("LDP q0, q1, [%0]\n\t"
+		     "STP q0, q1, [%1]\n\t"
+		     : : "r" (src), "r" (dst) :
+	);
+}
+
+static inline void
+rte_mov48(uint8_t *dst, const uint8_t *src)
+{
+	asm volatile("LDP q0, q1, [%0]\n\t"
+		     "STP q0, q1, [%1]\n\t"
+		     "LDP d0, d1, [%0 , #32]\n\t"
+		     "STP d0, d1, [%1 , #32]\n\t"
+		     : : "r" (src), "r" (dst) :
+	);
+}
+
+static inline void
+rte_mov64(uint8_t *dst, const uint8_t *src)
+{
+	asm volatile("LDP q0, q1, [%0]\n\t"
+		     "STP q0, q1, [%1]\n\t"
+		     "LDP q0, q1, [%0 , #32]\n\t"
+		     "STP q0, q1, [%1 , #32]\n\t"
+		     : : "r" (src), "r" (dst) :
+	);
+}
+
+static inline void
+rte_mov128(uint8_t *dst, const uint8_t *src)
+{
+	asm volatile("LDP q0, q1, [%0]\n\t"
+		     "STP q0, q1, [%1]\n\t"
+		     "LDP q0, q1, [%0 , #32]\n\t"
+		     "STP q0, q1, [%1 , #32]\n\t"
+		     "LDP q0, q1, [%0 , #64]\n\t"
+		     "STP q0, q1, [%1 , #64]\n\t"
+		     "LDP q0, q1, [%0 , #96]\n\t"
+		     "STP q0, q1, [%1 , #96]\n\t"
+		     : : "r" (src), "r" (dst) :
+	);
+}
+
+static inline void
+rte_mov256(uint8_t *dst, const uint8_t *src)
+{
+	asm volatile("LDP q0, q1, [%0]\n\t"
+		     "STP q0, q1, [%1]\n\t"
+		     "LDP q0, q1, [%0 , #32]\n\t"
+		     "STP q0, q1, [%1 , #32]\n\t"
+		     "LDP q0, q1, [%0 , #64]\n\t"
+		     "STP q0, q1, [%1 , #64]\n\t"
+		     "LDP q0, q1, [%0 , #96]\n\t"
+		     "STP q0, q1, [%1 , #96]\n\t"
+		     "LDP q0, q1, [%0 , #128]\n\t"
+		     "STP q0, q1, [%1 , #128]\n\t"
+		     "LDP q0, q1, [%0 , #160]\n\t"
+		     "STP q0, q1, [%1 , #160]\n\t"
+		     "LDP q0, q1, [%0 , #192]\n\t"
+		     "STP q0, q1, [%1 , #192]\n\t"
+		     "LDP q0, q1, [%0 , #224]\n\t"
+		     "STP q0, q1, [%1 , #224]\n\t"
+		     : : "r" (src), "r" (dst) :
+	);
+}
+
+#define rte_memcpy(dst, src, n)              \
+	({ (__builtin_constant_p(n)) ?       \
+	memcpy((dst), (src), (n)) :          \
+	rte_memcpy_func((dst), (src), (n)); })
+
+static inline void *
+rte_memcpy_func(void *dst, const void *src, size_t n)
+{
+	void *ret = dst;
+
+	/* We can't copy < 16 bytes using XMM registers so do it manually. */
+	if (n < 16) {
+		if (n & 0x01) {
+			*(uint8_t *)dst = *(const uint8_t *)src;
+			dst = (uint8_t *)dst + 1;
+			src = (const uint8_t *)src + 1;
+		}
+		if (n & 0x02) {
+			*(uint16_t *)dst = *(const uint16_t *)src;
+			dst = (uint16_t *)dst + 1;
+			src = (const uint16_t *)src + 1;
+		}
+		if (n & 0x04) {
+			*(uint32_t *)dst = *(const uint32_t *)src;
+			dst = (uint32_t *)dst + 1;
+			src = (const uint32_t *)src + 1;
+		}
+		if (n & 0x08)
+			*(uint64_t *)dst = *(const uint64_t *)src;
+		return ret;
+	}
+
+	/* Special fast cases for <= 128 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 <= 128) {
+		rte_mov64((uint8_t *)dst, (const uint8_t *)src);
+		rte_mov64((uint8_t *)dst - 64 + n,
+			(const uint8_t *)src - 64 + n);
+		return ret;
+	}
+
+	/*
+	 * For large copies > 128 bytes. This combination of 256, 64 and 16 byte
+	 * copies was found to be faster than doing 128 and 32 byte copies as
+	 * well.
+	 */
+	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;
+	}
+
+	/*
+	 * We split the remaining bytes (which will be less than 256) into
+	 * 64byte (2^6) chunks.
+	 * Using incrementing integers in the case labels of a switch statement
+	 * enourages the compiler to use a jump table. To get incrementing
+	 * integers, we shift the 2 relevant bits to the LSB position to first
+	 * get decrementing integers, and then subtract.
+	 */
+	switch (3 - (n >> 6)) {
+	case 0x00:
+		rte_mov64((uint8_t *)dst, (const uint8_t *)src);
+		n -= 64;
+		dst = (uint8_t *)dst + 64;
+		src = (const uint8_t *)src + 64;      /* fallthrough */
+	case 0x01:
+		rte_mov64((uint8_t *)dst, (const uint8_t *)src);
+		n -= 64;
+		dst = (uint8_t *)dst + 64;
+		src = (const uint8_t *)src + 64;      /* fallthrough */
+	case 0x02:
+		rte_mov64((uint8_t *)dst, (const uint8_t *)src);
+		n -= 64;
+		dst = (uint8_t *)dst + 64;
+		src = (const uint8_t *)src + 64;      /* fallthrough */
+	default:
+		break;
+	}
+
+	/*
+	 * We split the remaining bytes (which will be less than 64) into
+	 * 16byte (2^4) chunks, using the same switch structure as above.
+	 */
+	switch (3 - (n >> 4)) {
+	case 0x00:
+		rte_mov16((uint8_t *)dst, (const uint8_t *)src);
+		n -= 16;
+		dst = (uint8_t *)dst + 16;
+		src = (const uint8_t *)src + 16;      /* fallthrough */
+	case 0x01:
+		rte_mov16((uint8_t *)dst, (const uint8_t *)src);
+		n -= 16;
+		dst = (uint8_t *)dst + 16;
+		src = (const uint8_t *)src + 16;      /* fallthrough */
+	case 0x02:
+		rte_mov16((uint8_t *)dst, (const uint8_t *)src);
+		n -= 16;
+		dst = (uint8_t *)dst + 16;
+		src = (const uint8_t *)src + 16;      /* fallthrough */
+	default:
+		break;
+	}
+
+	/* Copy any remaining bytes, without going beyond end of buffers */
+	if (n != 0)
+		rte_mov16((uint8_t *)dst - 16 + n,
+			(const uint8_t *)src - 16 + n);
+	return ret;
+}
+
+#else
+
+static inline void
+rte_mov16(uint8_t *dst, const uint8_t *src)
+{
+	memcpy(dst, src, 16);
+}
+
+static inline void
+rte_mov32(uint8_t *dst, const uint8_t *src)
+{
+	memcpy(dst, src, 32);
+}
+
+static inline void
+rte_mov48(uint8_t *dst, const uint8_t *src)
+{
+	memcpy(dst, src, 48);
+}
+
+static inline void
+rte_mov64(uint8_t *dst, const uint8_t *src)
+{
+	memcpy(dst, src, 64);
+}
+
+static inline void
+rte_mov128(uint8_t *dst, const uint8_t *src)
+{
+	memcpy(dst, src, 128);
+}
+
+static inline void
+rte_mov256(uint8_t *dst, const uint8_t *src)
+{
+	memcpy(dst, src, 256);
+}
+
+static inline void *
+rte_memcpy(void *dst, const void *src, size_t n)
+{
+	return memcpy(dst, src, n);
+}
+
+static inline void *
+rte_memcpy_func(void *dst, const void *src, size_t n)
+{
+	return memcpy(dst, src, n);
+}
+
+#endif /* __ARM_NEON_FP */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTE_MEMCPY_ARM_64_H_ */
-- 
1.9.1



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