-/*-
- * 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.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
*/
#ifndef _RTE_BYTEORDER_H_
*/
#include <stdint.h>
-#ifdef RTE_EXEC_ENV_BSDAPP
+#ifdef RTE_EXEC_ENV_FREEBSD
#include <sys/endian.h>
#else
#include <endian.h>
#endif
#include <rte_common.h>
+#include <rte_config.h>
/*
* Compile-time endianness detection
#elif defined __LITTLE_ENDIAN__
#define RTE_BYTE_ORDER RTE_LITTLE_ENDIAN
#endif
+#if !defined(RTE_BYTE_ORDER)
+#error Unknown endianness.
+#endif
+
+#define RTE_STATIC_BSWAP16(v) \
+ ((((uint16_t)(v) & UINT16_C(0x00ff)) << 8) | \
+ (((uint16_t)(v) & UINT16_C(0xff00)) >> 8))
+
+#define RTE_STATIC_BSWAP32(v) \
+ ((((uint32_t)(v) & UINT32_C(0x000000ff)) << 24) | \
+ (((uint32_t)(v) & UINT32_C(0x0000ff00)) << 8) | \
+ (((uint32_t)(v) & UINT32_C(0x00ff0000)) >> 8) | \
+ (((uint32_t)(v) & UINT32_C(0xff000000)) >> 24))
+
+#define RTE_STATIC_BSWAP64(v) \
+ ((((uint64_t)(v) & UINT64_C(0x00000000000000ff)) << 56) | \
+ (((uint64_t)(v) & UINT64_C(0x000000000000ff00)) << 40) | \
+ (((uint64_t)(v) & UINT64_C(0x0000000000ff0000)) << 24) | \
+ (((uint64_t)(v) & UINT64_C(0x00000000ff000000)) << 8) | \
+ (((uint64_t)(v) & UINT64_C(0x000000ff00000000)) >> 8) | \
+ (((uint64_t)(v) & UINT64_C(0x0000ff0000000000)) >> 24) | \
+ (((uint64_t)(v) & UINT64_C(0x00ff000000000000)) >> 40) | \
+ (((uint64_t)(v) & UINT64_C(0xff00000000000000)) >> 56))
+
+/*
+ * These macros are functionally similar to rte_cpu_to_(be|le)(16|32|64)(),
+ * they take values in host CPU order and return them converted to the
+ * intended endianness.
+ *
+ * They resolve at compilation time to integer constants which can safely be
+ * used with static initializers, since those cannot involve function calls.
+ *
+ * On the other hand, they are not as optimized as their rte_cpu_to_*()
+ * counterparts, therefore applications should refrain from using them on
+ * variable values, particularly inside performance-sensitive code.
+ */
+#if RTE_BYTE_ORDER == RTE_BIG_ENDIAN
+#define RTE_BE16(v) (rte_be16_t)(v)
+#define RTE_BE32(v) (rte_be32_t)(v)
+#define RTE_BE64(v) (rte_be64_t)(v)
+#define RTE_LE16(v) (rte_le16_t)(RTE_STATIC_BSWAP16(v))
+#define RTE_LE32(v) (rte_le32_t)(RTE_STATIC_BSWAP32(v))
+#define RTE_LE64(v) (rte_le64_t)(RTE_STATIC_BSWAP64(v))
+#elif RTE_BYTE_ORDER == RTE_LITTLE_ENDIAN
+#define RTE_BE16(v) (rte_be16_t)(RTE_STATIC_BSWAP16(v))
+#define RTE_BE32(v) (rte_be32_t)(RTE_STATIC_BSWAP32(v))
+#define RTE_BE64(v) (rte_be64_t)(RTE_STATIC_BSWAP64(v))
+#define RTE_LE16(v) (rte_be16_t)(v)
+#define RTE_LE32(v) (rte_be32_t)(v)
+#define RTE_LE64(v) (rte_be64_t)(v)
+#else
+#error Unsupported endianness.
+#endif
/*
* The following types should be used when handling values according to a
static inline uint16_t
rte_constant_bswap16(uint16_t x)
{
- return (uint16_t)(((x & 0x00ffU) << 8) |
- ((x & 0xff00U) >> 8));
+ return (uint16_t)RTE_STATIC_BSWAP16(x);
}
/*
static inline uint32_t
rte_constant_bswap32(uint32_t x)
{
- return ((x & 0x000000ffUL) << 24) |
- ((x & 0x0000ff00UL) << 8) |
- ((x & 0x00ff0000UL) >> 8) |
- ((x & 0xff000000UL) >> 24);
+ return (uint32_t)RTE_STATIC_BSWAP32(x);
}
/*
static inline uint64_t
rte_constant_bswap64(uint64_t x)
{
- return ((x & 0x00000000000000ffULL) << 56) |
- ((x & 0x000000000000ff00ULL) << 40) |
- ((x & 0x0000000000ff0000ULL) << 24) |
- ((x & 0x00000000ff000000ULL) << 8) |
- ((x & 0x000000ff00000000ULL) >> 8) |
- ((x & 0x0000ff0000000000ULL) >> 24) |
- ((x & 0x00ff000000000000ULL) >> 40) |
- ((x & 0xff00000000000000ULL) >> 56);
+ return (uint64_t)RTE_STATIC_BSWAP64(x);
}
git.droids-corp.org / dpdk.git / blobdiff