144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
/***********************license start***************
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* Copyright (c) 2003-2010 Cavium Inc. (support@cavium.com). All rights
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* reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of Cavium Inc. nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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* This Software, including technical data, may be subject to U.S. export control
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* laws, including the U.S. Export Administration Act and its associated
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* regulations, and may be subject to export or import regulations in other
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* countries.
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
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* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
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* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
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* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
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* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
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* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
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* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
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* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
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* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
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***********************license end**************************************/
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/**
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* @file
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*
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* Utility functions for endian swapping
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*
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* <hr>$Revision: 32636 $<hr>
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*/
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#ifndef __CVMX_SWAP_H__
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#define __CVMX_SWAP_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Byte swap a 16 bit number
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*
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* @param x 16 bit number
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* @return Byte swapped result
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*/
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static inline uint16_t cvmx_swap16(uint16_t x)
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{
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return ((uint16_t)((((uint16_t)(x) & (uint16_t)0x00ffU) << 8) |
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(((uint16_t)(x) & (uint16_t)0xff00U) >> 8) ));
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}
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/**
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* Byte swap a 32 bit number
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*
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* @param x 32 bit number
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* @return Byte swapped result
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*/
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static inline uint32_t cvmx_swap32(uint32_t x)
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{
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return ((uint32_t)((((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) |
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(((uint32_t)(x) & (uint32_t)0x0000ff00UL) << 8) |
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(((uint32_t)(x) & (uint32_t)0x00ff0000UL) >> 8) |
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(((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24) ));
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}
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/**
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* Byte swap a 64 bit number
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*
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* @param x 64 bit number
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* @return Byte swapped result
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*/
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static inline uint64_t cvmx_swap64(uint64_t x)
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{
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return ((x >> 56) |
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(((x >> 48) & 0xfful) << 8) |
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(((x >> 40) & 0xfful) << 16) |
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(((x >> 32) & 0xfful) << 24) |
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(((x >> 24) & 0xfful) << 32) |
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(((x >> 16) & 0xfful) << 40) |
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(((x >> 8) & 0xfful) << 48) |
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(((x >> 0) & 0xfful) << 56));
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}
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#ifdef __BIG_ENDIAN_BITFIELD
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#define cvmx_cpu_to_le16(x) cvmx_swap16(x)
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#define cvmx_cpu_to_le32(x) cvmx_swap32(x)
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#define cvmx_cpu_to_le64(x) cvmx_swap64(x)
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#define cvmx_cpu_to_be16(x) (x)
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#define cvmx_cpu_to_be32(x) (x)
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#define cvmx_cpu_to_be64(x) (x)
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#else
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#define cvmx_cpu_to_le16(x) (x)
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#define cvmx_cpu_to_le32(x) (x)
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#define cvmx_cpu_to_le64(x) (x)
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#define cvmx_cpu_to_be16(x) cvmx_swap16(x)
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#define cvmx_cpu_to_be32(x) cvmx_swap32(x)
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#define cvmx_cpu_to_be64(x) cvmx_swap64(x)
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#endif
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#define cvmx_le16_to_cpu(x) cvmx_cpu_to_le16(x)
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#define cvmx_le32_to_cpu(x) cvmx_cpu_to_le32(x)
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#define cvmx_le64_to_cpu(x) cvmx_cpu_to_le64(x)
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#define cvmx_be16_to_cpu(x) cvmx_cpu_to_be16(x)
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#define cvmx_be32_to_cpu(x) cvmx_cpu_to_be32(x)
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#define cvmx_be64_to_cpu(x) cvmx_cpu_to_be64(x)
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#ifdef __cplusplus
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}
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#endif
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#endif /* __CVMX_SWAP_H__ */
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