src/math/lgammal_r.c

   1 #define _GNU_SOURCE 1
   2 #include <stdint.h>
   3 #include <stdio.h>
   4 #include "mtest.h"
   5
   6 static struct l_li t[] = {
   7 #if LDBL_MANT_DIG == 53
   8 #include "sanity/lgamma_r.h"
   9 #include "special/lgamma_r.h"
  10
  11 #elif LDBL_MANT_DIG == 64
  12 #include "sanity/lgammal_r.h"
  13 #include "special/lgammal_r.h"
  14
  15 #endif
  16 };
  17
  18 int main(void)
  19 {
  20         #pragma STDC FENV_ACCESS ON
  21         int yi;
  22         long double y;
  23         float d;
  24         int e, i, err = 0;
  25         struct l_li *p;
  26
  27         for (i = 0; i < sizeof t/sizeof *t; i++) {
  28                 p = t + i;
  29
  30                 if (p->r < 0)
  31                         continue;
  32                 fesetround(p->r);
  33                 feclearexcept(FE_ALL_EXCEPT);
  34                 y = lgammal_r(p->x, &yi);
  35                 e = fetestexcept(INEXACT|INVALID|DIVBYZERO|UNDERFLOW|OVERFLOW);
  36
  37                 if (!checkexcept(e, p->e, p->r)) {
  38                         printf("%s:%d: bad fp exception: %s lgammal_r(%La)=%La,%lld, want %s",
  39                                 p->file, p->line, rstr(p->r), p->x, p->y, p->i, estr(p->e));
  40                         printf(" got %s\n", estr(e));
  41                         err++;
  42                 }
  43                 d = ulperrl(y, p->y, p->dy);
  44                 // TODO: 2 ulp errors allowed
  45                 if ((p->r==RN && fabs(d)>2) || (!isnan(p->x) && p->x!=-inf && !(p->e&DIVBYZERO) && yi != p->i)) {
  46                         printf("%s:%d: %s lgammal_r(%La) want %La,%lld got %La,%d ulperr %.3f = %a + %a\n",
  47                                 p->file, p->line, rstr(p->r), p->x, p->y, p->i, y, yi, d, d-p->dy, p->dy);
  48                         err++;
  49                 }
  50         }
  51         return !!err;
  52 }