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/***********************license start***************
* Copyright (c) 2003-2010 Cavium Inc. (support@cavium.com). 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 Cavium Inc. 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, including technical data, may be subject to U.S. export control
* laws, including the U.S. Export Administration Act and its associated
* regulations, and may be subject to export or import regulations in other
* countries.
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
***********************license end**************************************/
/**
* @file
*
* Utility functions for endian swapping
*
* <hr>$Revision: 32636 $<hr>
*/
#ifndef __CVMX_SWAP_H__
#define __CVMX_SWAP_H__
#ifdef __cplusplus
extern "C" {
#endif
/**
* Byte swap a 16 bit number
*
* @param x 16 bit number
* @return Byte swapped result
*/
static inline uint16_t cvmx_swap16(uint16_t x)
{
return ((uint16_t)((((uint16_t)(x) & (uint16_t)0x00ffU) << 8) |
(((uint16_t)(x) & (uint16_t)0xff00U) >> 8) ));
}
/**
* Byte swap a 32 bit number
*
* @param x 32 bit number
* @return Byte swapped result
*/
static inline uint32_t cvmx_swap32(uint32_t x)
{
return ((uint32_t)((((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) |
(((uint32_t)(x) & (uint32_t)0x0000ff00UL) << 8) |
(((uint32_t)(x) & (uint32_t)0x00ff0000UL) >> 8) |
(((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24) ));
}
/**
* Byte swap a 64 bit number
*
* @param x 64 bit number
* @return Byte swapped result
*/
static inline uint64_t cvmx_swap64(uint64_t x)
{
return ((x >> 56) |
(((x >> 48) & 0xfful) << 8) |
(((x >> 40) & 0xfful) << 16) |
(((x >> 32) & 0xfful) << 24) |
(((x >> 24) & 0xfful) << 32) |
(((x >> 16) & 0xfful) << 40) |
(((x >> 8) & 0xfful) << 48) |
(((x >> 0) & 0xfful) << 56));
}
#ifdef __BIG_ENDIAN_BITFIELD
#define cvmx_cpu_to_le16(x) cvmx_swap16(x)
#define cvmx_cpu_to_le32(x) cvmx_swap32(x)
#define cvmx_cpu_to_le64(x) cvmx_swap64(x)
#define cvmx_cpu_to_be16(x) (x)
#define cvmx_cpu_to_be32(x) (x)
#define cvmx_cpu_to_be64(x) (x)
#else
#define cvmx_cpu_to_le16(x) (x)
#define cvmx_cpu_to_le32(x) (x)
#define cvmx_cpu_to_le64(x) (x)
#define cvmx_cpu_to_be16(x) cvmx_swap16(x)
#define cvmx_cpu_to_be32(x) cvmx_swap32(x)
#define cvmx_cpu_to_be64(x) cvmx_swap64(x)
#endif
#define cvmx_le16_to_cpu(x) cvmx_cpu_to_le16(x)
#define cvmx_le32_to_cpu(x) cvmx_cpu_to_le32(x)
#define cvmx_le64_to_cpu(x) cvmx_cpu_to_le64(x)
#define cvmx_be16_to_cpu(x) cvmx_cpu_to_be16(x)
#define cvmx_be32_to_cpu(x) cvmx_cpu_to_be32(x)
#define cvmx_be64_to_cpu(x) cvmx_cpu_to_be64(x)
#ifdef __cplusplus
}
#endif
#endif /* __CVMX_SWAP_H__ */
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