softfloat/s_shift128ExtraRightJam.c

   1
   2 #include <stdint.h>
   3 #include "platform.h"
   4 #include "primitives.h"
   5
   6 struct uint128_extra
   7  softfloat_shift128ExtraRightJam(
   8      uint64_t a64, uint64_t a0, uint64_t extra, unsigned int count )
   9 {
  10     unsigned int negCount;
  11     struct uint128_extra z;
  12
  13     negCount = - count;
  14     if ( count < 64 ) {
  15         z.v64 = a64>>count;
  16         z.v0 = a64<<( negCount & 63 ) | a0>>count;
  17         z.extra = a0<<( negCount & 63 );
  18     } else {
  19         z.v64 = 0;
  20         if ( count == 64 ) {
  21             z.v0 = a64;
  22             z.extra = a0;
  23         } else {
  24             extra |= a0;
  25             if ( count < 128 ) {
  26                 z.v0 = a64>>( count & 63 );
  27                 z.extra = a64<<( negCount & 63 );
  28             } else {
  29                 z.v0 = 0;
  30                 z.extra = ( count == 128 ) ? a64 : ( a64 != 0 );
  31             }
  32         }
  33     }
  34     z.extra |= ( extra != 0 );
  35     return z;
  36
  37 }
  38