1 /* $Id$ */

     1 /* $Id$ */

     2 

     2 

     3 #ifndef MACROS_H

     3 #ifndef MACROS_H

     4 #define MACROS_H

     4 #define MACROS_H

     7 

     5 

     8 /// Fetch n bits starting at bit s from x

     6 /// Fetch n bits starting at bit s from x

     9 #define GB(x, s, n) (((x) >> (s)) & ((1U << (n)) - 1))

     7 #define GB(x, s, n) (((x) >> (s)) & ((1U << (n)) - 1))

    10 /// Set n bits starting at bit s in x to d

     8 /// Set n bits starting at bit s in x to d

    11 #define SB(x, s, n, d) ((x) = ((x) & ~(((1U << (n)) - 1) << (s))) | ((d) << (s)))

     9 #define SB(x, s, n, d) ((x) = ((x) & ~(((1U << (n)) - 1) << (s))) | ((d) << (s)))