softfloat/s_add192.c

   1
   2 #include <stdint.h>
   3 #include "platform.h"
   4 #include "primitives.h"
   5
   6 struct uint192
   7  softfloat_add192(
   8      uint64_t a128,
   9      uint64_t a64,
  10      uint64_t a0,
  11      uint64_t b128,
  12      uint64_t b64,
  13      uint64_t b0
  14  )
  15 {
  16     struct uint192 z;
  17     unsigned int carry64, carry128;
  18
  19     z.v0 = a0 + b0;
  20     carry64 = ( z.v0 < a0 );
  21     z.v64 = a64 + b64;
  22     carry128 = ( z.v64 < a64 );
  23     z.v128 = a128 + b128;
  24     z.v64 += carry64;
  25     carry128 += ( z.v64 < carry64 );
  26     z.v128 += carry128;
  27     return z;
  28
  29 }
  30