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pow2.h
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1 
10 #ifndef __WS_POW2_H__
11 #define __WS_POW2_H__
12 
13 /*
14  * Macros to calculate pow2^M, for various power-of-2 values and positive
15  * integer values of M. That's (2^N)^M, i.e. 2^(N*M).
16  *
17  * The first argument is the type of the desired result; the second
18  * argument is M.
19  */
20 #define pow2(type, m) (((type)1U) << (m))
21 #define pow4(type, m) (((type)1U) << (2*(m)))
22 #define pow8(type, m) (((type)1U) << (3*(m)))
23 #define pow16(type, m) (((type)1U) << (4*(m)))
24 #define pow32(type, m) (((type)1U) << (5*(m)))
25 #define pow64(type, m) (((type)1U) << (6*(m)))
26 #define pow128(type, m) (((type)1U) << (7*(m)))
27 #define pow256(type, m) (((type)1U) << (8*(m)))
28 
29 #endif /* __WS_POW2_H__ */