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/***********************license start***************
 * Copyright (c) 2003-2010  Cavium Networks (support@cavium.com). All rights
 * reserved.
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 * modification, are permitted provided that the following conditions are
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 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
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 *     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
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 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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 ***********************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));
}


#if __BYTE_ORDER == __BIG_ENDIAN

#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__ */