src/math/copysign.c

   1 #include <stdint.h>
   2 #include <stdio.h>
   3 #include "util.h"
   4
   5 static struct dd_d t[] = {
   6 #include "sanity/copysign.h"
   7
   8 };
   9
  10 int main(void)
  11 {
  12         #pragma STDC FENV_ACCESS ON
  13         double y;
  14         float d;
  15         int e, i, err = 0;
  16         struct dd_d *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 = copysign(p->x, p->x2);
  26                 e = fetestexcept(INEXACT|INVALID|DIVBYZERO|UNDERFLOW|OVERFLOW);
  27
  28                 if (!checkexcept(e, p->e, p->r)) {
  29                         printf("%s:%d: bad fp exception: %s copysign(%a,%a)=%a, want %s",
  30                                 p->file, p->line, rstr(p->r), p->x, p->x2, p->y, estr(p->e));
  31                         printf(" got %s\n", estr(e));
  32                         err++;
  33                 }
  34                 d = ulperr(y, p->y, p->dy);
  35                 if (!checkulp(d, p->r)) {
  36                         printf("%s:%d: %s copysign(%a,%a) want %a got %a ulperr %.3f = %a + %a\n",
  37                                 p->file, p->line, rstr(p->r), p->x, p->x2, p->y, y, d, d-p->dy, p->dy);
  38                         err++;
  39                 }
  40         }
  41         return !!err;
  42 }