src/math/sqrt.c

   1 #include <stdint.h>
   2 #include <stdio.h>
   3 #include "util.h"
   4
   5 static struct d_d t[] = {
   6
   7 #include "ucb/sqrt.h"
   8 #include "sanity/sqrt.h"
   9 };
  10
  11 int main(void)
  12 {
  13         double y;
  14         float d;
  15         int e, i, err = 0;
  16         struct d_d *p;
  17
  18         for (i = 0; i < sizeof t/sizeof *t; i++) {
  19                 p = t + i;
  20                 setupfenv(p->r);
  21                 y = sqrt(p->x);
  22                 e = getexcept();
  23                 if (!checkexcept(e, p->e, p->r)) {
  24                         printf("%s sqrt(%a)==%a except: want %s", rstr(p->r), p->x, p->y, estr(p->e));
  25                         printf(" got %s\n", estr(e));
  26                         err++;
  27                 }
  28                 d = ulperr(y, p->y, p->dy);
  29                 if (!checkulp(d, p->r)) {
  30                         printf("%s sqrt(%a) want %a got %a ulperr %.3f = %a + %a\n",
  31                                 rstr(p->r), p->x, p->y, y, d, d-p->dy, p->dy);
  32                         err++;
  33                 }
  34         }
  35         return !!err;
  36 }