softfloat/s_shift128RightJam.c

   1
   2 #include <stdint.h>
   3 #include "platform.h"
   4 #include "primitives.h"
   5
   6 struct uint128
   7  softfloat_shift128RightJam( uint64_t a64, uint64_t a0, unsigned int count )
   8 {
   9     unsigned int negCount;
  10     struct uint128 z;
  11
  12     if ( count < 64 ) {
  13         negCount = - count;
  14         z.v64 = a64>>( count & 63 );
  15         z.v0 =
  16             a64<<( negCount & 63 ) | a0>>count
  17                 | ( (uint64_t) ( a0<<( negCount & 63 ) ) != 0 );
  18     } else {
  19         z.v64 = 0;
  20         z.v0 =
  21             ( count < 128 )
  22                 ? a64>>( count & 63 )
  23                       | ( ( ( a64 & ( ( (uint64_t) 1<<( count & 63 ) ) - 1 ) )
  24                                 | a0 )
  25                               != 0 )
  26                 : ( ( a64 | a0 ) != 0 );
  27     }
  28     return z;
  29
  30 }
  31