src/math/copysignl.c

   1 #include <stdint.h>
   2 #include <stdio.h>
   3 #include "util.h"
   4
   5 static struct ll_l t[] = {
   6 #if LDBL_MANT_DIG == 53
   7 #include "sanity/copysign.h"
   8
   9 #elif LDBL_MANT_DIG == 64
  10 #include "sanity/copysignl.h"
  11
  12 #endif
  13 };
  14
  15 int main(void)
  16 {
  17         #pragma STDC FENV_ACCESS ON
  18         long double y;
  19         float d;
  20         int e, i, err = 0;
  21         struct ll_l *p;
  22
  23         for (i = 0; i < sizeof t/sizeof *t; i++) {
  24                 p = t + i;
  25
  26                 if (p->r < 0)
  27                         continue;
  28                 fesetround(p->r);
  29                 feclearexcept(FE_ALL_EXCEPT);
  30                 y = copysignl(p->x, p->x2);
  31                 e = fetestexcept(INEXACT|INVALID|DIVBYZERO|UNDERFLOW|OVERFLOW);
  32
  33                 if (!checkexcept(e, p->e, p->r)) {
  34                         printf("%s:%d: bad fp exception: %s copysignl(%La,%La)=%La, want %s",
  35                                 p->file, p->line, rstr(p->r), p->x, p->x2, p->y, estr(p->e));
  36                         printf(" got %s\n", estr(e));
  37                         err++;
  38                 }
  39                 d = ulperrl(y, p->y, p->dy);
  40                 if (!checkulp(d, p->r)) {
  41                         printf("%s:%d: %s copysignl(%La,%La) want %La got %La ulperr %.3f = %a + %a\n",
  42                                 p->file, p->line, rstr(p->r), p->x, p->x2, p->y, y, d, d-p->dy, p->dy);
  43                         err++;
  44                 }
  45         }
  46         return !!err;
  47 }