src/math/y0f.c

   1 #define _DEFAULT_SOURCE 1
   2 #define _BSD_SOURCE 1
   3 #include <stdint.h>
   4 #include <stdio.h>
   5 #include "mtest.h"
   6
   7 static struct f_f t[] = {
   8 #include "sanity/y0f.h"
   9 #include "special/y0f.h"
  10
  11 };
  12
  13 int main(void)
  14 {
  15         #pragma STDC FENV_ACCESS ON
  16         float y;
  17         float d;
  18         int e, i, err = 0;
  19         struct f_f *p;
  20
  21         for (i = 0; i < sizeof t/sizeof *t; i++) {
  22                 p = t + i;
  23
  24                 if (p->r < 0)
  25                         continue;
  26                 fesetround(p->r);
  27                 feclearexcept(FE_ALL_EXCEPT);
  28                 y = y0f(p->x);
  29                 e = fetestexcept(INEXACT|INVALID|DIVBYZERO|UNDERFLOW|OVERFLOW);
  30
  31                 if (!checkexcept(e, p->e, p->r)) {
  32                         printf("%s:%d: bad fp exception: %s y0f(%a)=%a, want %s",
  33                                 p->file, p->line, rstr(p->r), p->x, p->y, estr(p->e));
  34                         printf(" got %s\n", estr(e));
  35                         err++;
  36                 }
  37                 d = ulperrf(y, p->y, p->dy);
  38                 if ((!(p->x < 0) && !checkulp(d, p->r)) || (p->x < 0 && !isnan(y) && y != -inf)) {
  39 //                      printf("%s:%d: %s y0f(%a) want %a got %a ulperr %.3f = %a + %a\n",
  40 //                              p->file, p->line, rstr(p->r), p->x, p->y, y, d, d-p->dy, p->dy);
  41                         err++;
  42                         // TODO: avoid spamming the output
  43                         printf(__FILE__ ": known to be broken near zeros\n");
  44                         break;
  45                 }
  46         }
  47         return !!err;
  48 }