1 /***********************license start***************
2 * Copyright (c) 2003-2010 Cavium Inc. ([email protected]). All rights
3 * reserved.
4 *
5 *
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12 *
13 * * Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
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22
23 * This Software, including technical data, may be subject to U.S. export control
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27
28 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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37 * PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
38 ***********************license end**************************************/
39
40
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43
44
45
46 /**
47 * @file
48 *
49 * Utility functions for endian swapping
50 *
51 * <hr>$Revision: 32636 $<hr>
52 */
53
54 #ifndef __CVMX_SWAP_H__
55 #define __CVMX_SWAP_H__
56
57 #ifdef __cplusplus
58 extern "C" {
59 #endif
60
61
62 /**
63 * Byte swap a 16 bit number
64 *
65 * @param x 16 bit number
66 * @return Byte swapped result
67 */
cvmx_swap16(uint16_t x)68 static inline uint16_t cvmx_swap16(uint16_t x)
69 {
70 return ((uint16_t)((((uint16_t)(x) & (uint16_t)0x00ffU) << 8) |
71 (((uint16_t)(x) & (uint16_t)0xff00U) >> 8) ));
72 }
73
74
75 /**
76 * Byte swap a 32 bit number
77 *
78 * @param x 32 bit number
79 * @return Byte swapped result
80 */
cvmx_swap32(uint32_t x)81 static inline uint32_t cvmx_swap32(uint32_t x)
82 {
83 return ((uint32_t)((((uint32_t)(x) & (uint32_t)0x000000ffUL) << 24) |
84 (((uint32_t)(x) & (uint32_t)0x0000ff00UL) << 8) |
85 (((uint32_t)(x) & (uint32_t)0x00ff0000UL) >> 8) |
86 (((uint32_t)(x) & (uint32_t)0xff000000UL) >> 24) ));
87 }
88
89
90 /**
91 * Byte swap a 64 bit number
92 *
93 * @param x 64 bit number
94 * @return Byte swapped result
95 */
cvmx_swap64(uint64_t x)96 static inline uint64_t cvmx_swap64(uint64_t x)
97 {
98 return ((x >> 56) |
99 (((x >> 48) & 0xfful) << 8) |
100 (((x >> 40) & 0xfful) << 16) |
101 (((x >> 32) & 0xfful) << 24) |
102 (((x >> 24) & 0xfful) << 32) |
103 (((x >> 16) & 0xfful) << 40) |
104 (((x >> 8) & 0xfful) << 48) |
105 (((x >> 0) & 0xfful) << 56));
106 }
107
108
109 #ifdef __BIG_ENDIAN_BITFIELD
110
111 #define cvmx_cpu_to_le16(x) cvmx_swap16(x)
112 #define cvmx_cpu_to_le32(x) cvmx_swap32(x)
113 #define cvmx_cpu_to_le64(x) cvmx_swap64(x)
114
115 #define cvmx_cpu_to_be16(x) (x)
116 #define cvmx_cpu_to_be32(x) (x)
117 #define cvmx_cpu_to_be64(x) (x)
118
119 #else
120
121 #define cvmx_cpu_to_le16(x) (x)
122 #define cvmx_cpu_to_le32(x) (x)
123 #define cvmx_cpu_to_le64(x) (x)
124
125 #define cvmx_cpu_to_be16(x) cvmx_swap16(x)
126 #define cvmx_cpu_to_be32(x) cvmx_swap32(x)
127 #define cvmx_cpu_to_be64(x) cvmx_swap64(x)
128
129 #endif
130
131 #define cvmx_le16_to_cpu(x) cvmx_cpu_to_le16(x)
132 #define cvmx_le32_to_cpu(x) cvmx_cpu_to_le32(x)
133 #define cvmx_le64_to_cpu(x) cvmx_cpu_to_le64(x)
134
135 #define cvmx_be16_to_cpu(x) cvmx_cpu_to_be16(x)
136 #define cvmx_be32_to_cpu(x) cvmx_cpu_to_be32(x)
137 #define cvmx_be64_to_cpu(x) cvmx_cpu_to_be64(x)
138
139 #ifdef __cplusplus
140 }
141 #endif
142
143 #endif /* __CVMX_SWAP_H__ */
144