lib/libminlib/u64util.c

   1 /* Few u64 utils implemented in C
   2  * Author: Gautam BT
   3  */
   4 #include <minix/u64.h>
   5
   6 u64_t rrotate64(u64_t x, unsigned short b)
   7 {
   8         b %= 64;
   9         if ((b &= 63) == 0)
  10                 return x;
  11         return (x >> b) | (x << (64 - b));
  12 }
  13
  14 u64_t rshift64(u64_t x, unsigned short b)
  15 {
  16         if (b >= 64)
  17                 return 0;
  18         return x >> b;
  19 }
  20
  21 u64_t xor64(u64_t a, u64_t b)
  22 {
  23         return a ^ b;
  24 }
  25
  26 u64_t and64(u64_t a, u64_t b)
  27 {
  28         return a & b;
  29 }
  30
  31 u64_t not64(u64_t a)
  32 {
  33         return ~a;
  34 }