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/* Test of ldexp function. NaNs.
$Id: ldexp-nan.c,v 1.1 2007/02/05 21:35:58 dmix Exp $
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "progmem.h"
union lofl_u {
long lo;
float fl;
};
volatile union lofl_u v = { .lo = 1 };
PROGMEM const struct { /* Table of test cases. */
union lofl_u x;
int y;
} t[] = {
{ { 0x7f800001 }, 1 },
{ { 0x7f800100 }, 1 },
{ { 0x7f810000 }, 1 },
{ { 0x7fffffff }, 1 },
{ { 0xff800001 }, 1 },
{ { 0xff800100 }, 1 },
{ { 0xff810000 }, 1 },
{ { 0xffffffff }, 1 },
{ { 0x7fc00000 }, 0 },
{ { 0xffc00000 }, 0 },
{ { 0x7fc00000 }, 32767 },
{ { 0x7fc00000 }, -32768 },
};
void x_exit (int index)
{
#ifndef __AVR__
fprintf (stderr, "t[%d]: %e (%#lx)\n", index - 1, v.fl, v.lo);
#endif
exit (index ? index : -1);
}
int main ()
{
union lofl_u x;
int y;
int i;
for (i = 0; i < (int) (sizeof(t) / sizeof(t[0])); i++) {
x.lo = pgm_read_dword (& t[i].x);
y = pgm_read_word (& t[i].y);
v.fl = ldexp (x.fl, y);
if (!isnan(v.fl))
x_exit (i+1);
}
return 0;
}
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