src/gallium/tests/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
  14    for(i = 0; i < 1 << 16; ++i)
  15    {
  16       uint16_t h = (uint16_t) i;
  17       union fi f;
  18       uint16_t rh;
  19
  20       f.f = util_half_to_float(h);
  21       rh = util_float_to_half(f.f);
  22
  23       if (h != rh && !(util_is_half_nan(h) && util_is_half_nan(rh))) {
  24          printf("Roundtrip failed: %x -> %x = %f -> %x\n", h, f.ui, f.f, rh);
  25          ++roundtrip_fails;
  26       }
  27    }
  28
  29    if(roundtrip_fails) {
  30       printf("Failure! %u/65536 half floats failed a conversion to float and back.\n", roundtrip_fails);
  31       return 1;
  32    } else {
  33       printf("Success!\n");
  34       return 0;
  35    }
  36 }