src/math/y0.c

   1 #define _XOPEN_SOURCE 700
   2 #include <stdint.h>
   3 #include <stdio.h>
   4 #include "mtest.h"
   5
   6 static struct d_d t[] = {
   7 #include "sanity/y0.h"
   8 #include "special/y0.h"
   9
  10 };
  11
  12 int main(void)
  13 {
  14         #pragma STDC FENV_ACCESS ON
  15         double y;
  16         float d;
  17         int e, i, err = 0;
  18         struct d_d *p;
  19
  20         for (i = 0; i < sizeof t/sizeof *t; i++) {
  21                 p = t + i;
  22
  23                 if (p->r < 0)
  24                         continue;
  25                 fesetround(p->r);
  26                 feclearexcept(FE_ALL_EXCEPT);
  27                 y = y0(p->x);
  28                 e = fetestexcept(INEXACT|INVALID|DIVBYZERO|UNDERFLOW|OVERFLOW);
  29
  30                 if (!checkexcept(e, p->e, p->r)) {
  31                         printf("%s:%d: bad fp exception: %s y0(%a)=%a, want %s",
  32                                 p->file, p->line, rstr(p->r), p->x, p->y, estr(p->e));
  33                         printf(" got %s\n", estr(e));
  34                         err++;
  35                 }
  36                 d = ulperr(y, p->y, p->dy);
  37                 if ((!(p->x < 0) && !checkulp(d, p->r)) || (p->x < 0 && !isnan(y) && y != -inf)) {
  38 //                      printf("%s:%d: %s y0(%a) want %a got %a ulperr %.3f = %a + %a\n",
  39 //                              p->file, p->line, rstr(p->r), p->x, p->y, y, d, d-p->dy, p->dy);
  40                         err++;
  41                         // TODO: avoid spamming the output
  42                         printf(__FILE__ ": known to be broken near zeros\n");
  43                         break;
  44                 }
  45         }
  46         return !!err;
  47 }