progs/gallium/unit/u_half_test.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include <float.h>
   4
   5 #include "util/u_math.h"
   6 #include "util/u_half.h"
   7
   8 int
   9 main(int argc, char **argv)
  10 {
  11    unsigned i;
  12    unsigned roundtrip_fails = 0;
  13    for(i = 0; i < 1 << 16; ++i)
  14    {
  15       uint16_t h = (uint16_t) i;
  16       union fi f;
  17       uint16_t rh;
  18       f.ui = util_half_to_floatui(h);
  19       rh = util_floatui_to_half(f.ui);
  20       if(h != rh)
  21       {
  22          printf("Roundtrip failed: %x -> %x = %f -> %x\n", h, f.ui, f.f, rh);
  23          ++roundtrip_fails;
  24       }
  25    }
  26
  27    if(roundtrip_fails)
  28       printf("Failure! %u/65536 half floats failed a conversion to float and back.\n", roundtrip_fails);
  29    else
  30       printf("Success!\n");
  31    return 0;
  32 }