src/math/tgammal.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 "sanity/tgamma.h"
   8 #include "special/tgamma.h"
   9
  10 #elif LDBL_MANT_DIG == 64
  11 #include "sanity/tgammal.h"
  12 #include "special/tgammal.h"
  13
  14 #endif
  15 };
  16
  17 int main(void)
  18 {
  19         #pragma STDC FENV_ACCESS ON
  20         long double y;
  21         float d;
  22         int e, i, err = 0;
  23         struct l_l *p;
  24
  25         for (i = 0; i < sizeof t/sizeof *t; i++) {
  26                 p = t + i;
  27
  28                 if (p->r < 0)
  29                         continue;
  30                 fesetround(p->r);
  31                 feclearexcept(FE_ALL_EXCEPT);
  32                 y = tgammal(p->x);
  33                 e = fetestexcept(INEXACT|INVALID|DIVBYZERO|UNDERFLOW|OVERFLOW);
  34
  35                 if (!checkexcept(e, p->e, p->r)) {
  36                         printf("%s:%d: bad fp exception: %s tgammal(%La)=%La, want %s",
  37                                 p->file, p->line, rstr(p->r), p->x, p->y, estr(p->e));
  38                         printf(" got %s\n", estr(e));
  39                         err++;
  40                 }
  41                 d = ulperrl(y, p->y, p->dy);
  42                 // TODO: 2 ulp errors allowed
  43                 if (p->r==RN && fabs(d)>2) {
  44                         printf("%s:%d: %s tgammal(%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 }