src/math/log2l.c

   1 #include <stdint.h>
   2 #include <stdio.h>
   3 #include "mtest.h"
   4
   5 static struct l_l t[] = {
   6 #if LDBL_MANT_DIG == 53
   7 #include "crlibm/log2.h"
   8 #include "sanity/log2.h"
   9 #include "special/log2.h"
  10
  11 #elif LDBL_MANT_DIG == 64
  12 #include "sanity/log2l.h"
  13 #include "special/log2l.h"
  14
  15 #endif
  16 };
  17
  18 int main(void)
  19 {
  20         #pragma STDC FENV_ACCESS ON
  21         long double y;
  22         float d;
  23         int e, i, err = 0;
  24         struct l_l *p;
  25
  26         for (i = 0; i < sizeof t/sizeof *t; i++) {
  27                 p = t + i;
  28
  29                 if (p->r < 0)
  30                         continue;
  31                 fesetround(p->r);
  32                 feclearexcept(FE_ALL_EXCEPT);
  33                 y = log2l(p->x);
  34                 e = fetestexcept(INEXACT|INVALID|DIVBYZERO|UNDERFLOW|OVERFLOW);
  35
  36                 if (!checkexcept(e, p->e, p->r)) {
  37                         printf("%s:%d: bad fp exception: %s log2l(%La)=%La, want %s",
  38                                 p->file, p->line, rstr(p->r), p->x, p->y, estr(p->e));
  39                         printf(" got %s\n", estr(e));
  40                         err++;
  41                 }
  42                 d = ulperrl(y, p->y, p->dy);
  43                 if (!checkulp(d, p->r)) {
  44                         printf("%s:%d: %s log2l(%La) want %La got %La ulperr %.3f = %a + %a\n",
  45                                 p->file, p->line, rstr(p->r), p->x, p->y, y, d, d-p->dy, p->dy);
  46                         err++;
  47                 }
  48         }
  49         return !!err;
  50 }