1 /***********************license start***********************************
2 * Copyright (c) 2003-2017 Cavium Inc. ([email protected]). All rights
3 * reserved.
4 *
5 *
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11 * notice, this list of conditions and the following disclaimer.
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.
17 *
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19 * its contributors may be used to endorse or promote products
20 * derived from this software without specific prior written
21 * permission.
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23 * This Software, including technical data, may be subject to U.S. export
24 * control laws, including the U.S. Export Administration Act and its
25 * associated regulations, and may be subject to export or import
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28 * TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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38 ***********************license end**************************************/
39
40 /**
41 * Small utility functions for use by libdram internally. These
42 * are not meant for users's of the libdram API.
43 */
44
45 /**
46 * Standard min(a,b) macro
47 */
48 #define min(X, Y) \
49 ({ typeof (X) __x = (X); \
50 typeof (Y) __y = (Y); \
51 (__x < __y) ? __x : __y; })
52
53 /**
54 * Standard max(a,b) macro
55 */
56 #define max(X, Y) \
57 ({ typeof (X) __x = (X); typeof(Y) __y = (Y); \
58 (__x > __y) ? __x : __y; })
59
60 /**
61 * Absolute value of an integer
62 *
63 * @param v
64 *
65 * @return
66 */
_abs(int64_t v)67 static inline int64_t _abs(int64_t v)
68 {
69 return (v < 0) ? -v : v;
70 }
71
72 /**
73 * Sign of an integer
74 *
75 * @param v
76 *
77 * @return
78 */
_sign(int64_t v)79 static inline int64_t _sign(int64_t v)
80 {
81 return v < 0;
82 }
83
84 /**
85 * Divide and round results up to the next higher integer.
86 *
87 * @param dividend
88 * @param divisor
89 *
90 * @return
91 */
divide_roundup(uint64_t dividend,uint64_t divisor)92 static inline uint64_t divide_roundup(uint64_t dividend, uint64_t divisor)
93 {
94 return (dividend + divisor - 1) / divisor;
95 }
96
97