src/math/modff.c

   1 #include <stdint.h>
   2 #include <stdio.h>
   3 #include "mtest.h"
   4
   5 static struct f_ff t[] = {
   6 #include "sanity/modff.h"
   7 #include "special/modff.h"
   8 };
   9
  10 int main(void)
  11 {
  12         #pragma STDC FENV_ACCESS ON
  13         float y, yi;
  14         float d, di;
  15         int e, i, err = 0;
  16         struct f_ff *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 = modff(p->x, &yi);
  26                 e = fetestexcept(INEXACT|INVALID|DIVBYZERO|UNDERFLOW|OVERFLOW);
  27
  28                 /* TODO: fix inexact */
  29                 if (!checkexceptall(e|INEXACT, p->e|INEXACT, p->r)) {
  30                         printf("%s:%d: bad fp exception: %s modff(%a)=%a,%a, want %s",
  31                                 p->file, p->line, rstr(p->r), p->x, p->y, p->y2, estr(p->e));
  32                         printf(" got %s\n", estr(e));
  33                         err++;
  34                 }
  35                 d = ulperr(y, p->y, p->dy);
  36                 di = ulperr(yi, p->y2, p->dy2);
  37                 if (!checkcr(y, p->y, p->r) || !checkcr(yi, p->y2, p->r)) {
  38                         printf("%s:%d: %s modff(%a) want %a,%a got %a,%a, ulperr %.3f = %a + %a, %.3f = %a + %a\n",
  39                                 p->file, p->line, rstr(p->r), p->x, p->y, p->y2, y, yi, d, d-p->dy, p->dy, di, di-p->dy2, p->dy2);
  40                         err++;
  41                 }
  42         }
  43         return !!err;
  44 }