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/* Test of isfinite(). Both realizations are tested: inline and library.
$Id: isfinite-01.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;
};
PROGMEM const union lofl_u t0[] = { /* is finite */
/* positive finite */
{ 0x00000000 },
{ 0x00000001 },
{ 0x00000100 },
{ 0x00010000 },
{ 0x007fffff },
{ 0x00800000 },
{ 0x01000000 },
{ 0x3f800000 },
{ 0x7effffff },
{ 0x7f7fffff },
/* negative finite */
{ 0x80000000 },
{ 0x80000001 },
{ 0x80000100 },
{ 0x80010000 },
{ 0x807fffff },
{ 0x80800000 },
{ 0x81000000 },
{ 0xbf800000 },
{ 0xfeffffff },
{ 0xff7fffff },
};
PROGMEM const union lofl_u t1[] = { /* is't finite */
/* Inf */
{ 0x7f800000 },
{ 0xff800000 },
/* NaN */
{ 0x7f800001 },
{ 0x7f800100 },
{ 0x7f810000 },
{ 0x7fc00000 },
{ 0x7fffffff },
{ 0xff800001 },
{ 0xff800100 },
{ 0xff810000 },
{ 0xffc00000 },
{ 0xffffffff },
};
void x_exit (int index)
{
#ifndef __AVR__
fprintf (stderr, "t[%d]\n", index - 1);
#endif
exit (index ? index : -1);
}
int main ()
{
union lofl_u x;
int i;
int (* volatile vp) (double);
/* inline */
for (i = 0; i < (int) (sizeof(t0) / sizeof(t0[0])); i++) {
x.lo = pgm_read_dword (& t0[i]);
if (!isfinite(x.fl))
x_exit (i + 1);
}
for (i = 0; i < (int) (sizeof(t1) / sizeof(t1[0])); i++) {
x.lo = pgm_read_dword (& t1[i]);
if (isfinite(x.fl))
x_exit (i + 0x101);
}
#ifdef __AVR__
/* library function */
vp = isfinite;
for (i = 0; i < (int) (sizeof(t0) / sizeof(t0[0])); i++) {
x.lo = pgm_read_dword (& t0[i]);
if (! vp(x.fl))
x_exit (i + 0x201);
}
for (i = 0; i < (int) (sizeof(t1) / sizeof(t1[0])); i++) {
x.lo = pgm_read_dword (& t1[i]);
if (vp(x.fl))
x_exit (i + 0x301);
}
#else
(void)vp;
#endif
return 0;
}
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