src/math/exp2.c

   1 #include <stdint.h>
   2 #include <stdio.h>
   3 #include "mtest.h"
   4
   5 static struct d_d t[] = {
   6 #include "sanity/exp2.h"
   7 #include "special/exp2.h"
   8
   9 };
  10
  11 int main(void)
  12 {
  13         #pragma STDC FENV_ACCESS ON
  14         double y;
  15         float d;
  16         int e, i, err = 0;
  17         struct d_d *p;
  18
  19         for (i = 0; i < sizeof t/sizeof *t; i++) {
  20                 p = t + i;
  21
  22                 if (p->r < 0)
  23                         continue;
  24                 fesetround(p->r);
  25                 feclearexcept(FE_ALL_EXCEPT);
  26                 y = exp2(p->x);
  27                 e = fetestexcept(INEXACT|INVALID|DIVBYZERO|UNDERFLOW|OVERFLOW);
  28
  29                 if (!checkexcept(e, p->e, p->r)) {
  30                         if (fabs(y) < 0x1p-1022 && (e|INEXACT) == (INEXACT|UNDERFLOW))
  31                                 printf("X ");
  32                         else
  33                                 err++;
  34                         printf("%s:%d: bad fp exception: %s exp2(%a)=%a, want %s",
  35                                 p->file, p->line, rstr(p->r), p->x, p->y, estr(p->e));
  36                         printf(" got %s\n", estr(e));
  37                 }
  38                 d = ulperr(y, p->y, p->dy);
  39                 if (!checkulp(d, p->r)) {
  40                         printf("%s:%d: %s exp2(%a) want %a got %a ulperr %.3f = %a + %a\n",
  41                                 p->file, p->line, rstr(p->r), p->x, p->y, y, d, d-p->dy, p->dy);
  42                         err++;
  43                 }
  44         }
  45         return !!err;
  46 }