src/math/fmaf.c

   1 #include <stdint.h>
   2 #include <stdio.h>
   3 #include "mtest.h"
   4
   5 static struct fff_f t[] = {
   6 #include "sanity/fmaf.h"
   7 #include "special/fmaf.h"
   8 };
   9
  10 int main(void)
  11 {
  12         #pragma STDC FENV_ACCESS ON
  13         float y;
  14         float d;
  15         int e, i, err = 0;
  16         struct fff_f *p;
  17
  18         for (i = 0; i < sizeof t/sizeof *t; i++) {
  19                 p = t + i;
  20
  21                 if (p->r < 0)
  22                         continue;
  23                 fesetround(p->r);
  24                 feclearexcept(FE_ALL_EXCEPT);
  25                 y = fmaf(p->x, p->x2, p->x3);
  26                 e = fetestexcept(INEXACT|INVALID|DIVBYZERO|UNDERFLOW|OVERFLOW);
  27
  28                 /* do not check inexact by default */
  29 #if defined CHECK_INEXACT || defined CHECK_INEXACT_OMISSION
  30                 if (!checkexceptall(e, p->e, p->r)) {
  31 #else
  32                 if (!checkexceptall(e|INEXACT, p->e|INEXACT, p->r)) {
  33 #endif
  34                         printf("%s:%d: bad fp exception: %s fmaf(%a,%a,%a)=%a, want %s",
  35                                 p->file, p->line, rstr(p->r), p->x, p->x2, p->x3, p->y, estr(p->e));
  36                         printf(" got %s\n", estr(e));
  37                         err++;
  38                 }
  39                 d = ulperrf(y, p->y, p->dy);
  40                 if (!checkcr(y, p->y, p->r)) {
  41                         printf("%s:%d: %s fmaf(%a,%a,%a) want %a got %a ulperr %.3f = %a + %a\n",
  42                                 p->file, p->line, rstr(p->r), p->x, p->x2, p->x3, p->y, y, d, d-p->dy, p->dy);
  43                         err++;
  44                 }
  45         }
  46         return !!err;
  47 }