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/* Test of division. NaNs.
$Id: div-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: x / y = NaN */
union lofl_u x, y;
} t[] = {
/* 0.0 / 0.0 */
{ { 0x00000000 }, { 0x00000000 } },
{ { 0x00000000 }, { 0x80000000 } },
{ { 0x80000000 }, { 0x00000000 } },
{ { 0x80000000 }, { 0x80000000 } },
/* Inf / Inf */
{ { 0x7f800000 }, { 0x7f800000 } },
{ { 0xff800000 }, { 0x7f800000 } },
{ { 0x7f800000 }, { 0xff800000 } },
{ { 0xff800000 }, { 0xff800000 } },
/* NaN * NaN */
{ { 0x7f800001 }, { 0x7f800001 } },
{ { 0x7f800100 }, { 0x7f800100 } },
{ { 0x7f810000 }, { 0x7f810000 } },
{ { 0x7fffffff }, { 0x7fffffff } },
{ { 0xff800001 }, { 0xff800001 } },
{ { 0xff800100 }, { 0xff800100 } },
{ { 0xff810000 }, { 0xff810000 } },
{ { 0xffffffff }, { 0xffffffff } },
/* NaN / finite */
{ { 0x7f800001 }, { .fl = 1 } },
{ { 0x7f800100 }, { .fl = 1 } },
{ { 0x7f810000 }, { .fl = 1 } },
{ { 0x7fffffff }, { .fl = 1 } },
{ { 0xff800001 }, { .fl = 1 } },
{ { 0xff800100 }, { .fl = 1 } },
{ { 0xff810000 }, { .fl = 1 } },
{ { 0xffffffff }, { .fl = 1 } },
/* finite / NaN */
{ { .fl = 1 }, { 0x7f800001 } },
{ { .fl = 1 }, { 0x7f800100 } },
{ { .fl = 1 }, { 0x7f810000 } },
{ { .fl = 1 }, { 0x7fffffff } },
{ { .fl = 1 }, { 0xff800001 } },
{ { .fl = 1 }, { 0xff800100 } },
{ { .fl = 1 }, { 0xff810000 } },
{ { .fl = 1 }, { 0xffffffff } },
/* NaN / 0.0 */
{ { 0x7f800001 }, { 0 } },
{ { 0x7f800100 }, { 0 } },
{ { 0x7f810000 }, { 0 } },
{ { 0x7fffffff }, { 0 } },
{ { 0xff800001 }, { 0 } },
{ { 0xff800100 }, { 0 } },
{ { 0xff810000 }, { 0 } },
{ { 0xffffffff }, { 0 } },
/* 0.0 / NaN */
{ { 0 }, { 0x7f800001 } },
{ { 0 }, { 0x7f800100 } },
{ { 0 }, { 0x7f810000 } },
{ { 0 }, { 0x7fffffff } },
{ { 0 }, { 0xff800001 } },
{ { 0 }, { 0xff800100 } },
{ { 0 }, { 0xff810000 } },
{ { 0 }, { 0xffffffff } },
/* NaN / Inf */
{ { 0x7f800001 }, { 0x7f800000 } },
{ { 0x7fffffff }, { 0x7f800000 } },
{ { 0xff800001 }, { 0xff800000 } },
{ { 0xffffffff }, { 0xff800000 } },
/* Inf / NaN */
{ { 0x7f800000 }, { 0x7f800001 } },
{ { 0x7f800000 }, { 0x7fffffff } },
{ { 0xff800000 }, { 0xff800001 } },
{ { 0xff800000 }, { 0xffffffff } },
};
void x_exit (int index)
{
#ifndef __AVR__
fprintf (stderr, "t[%d]: %#lx\n", index - 1, v.lo);
#endif
exit (index ? index : -1);
}
int main ()
{
union lofl_u x,y;
int i;
for (i = 0; i < (int) (sizeof(t) / sizeof(t[0])); i++) {
x.lo = pgm_read_dword (& t[i].x);
y.lo = pgm_read_dword (& t[i].y);
v.fl = x.fl / y.fl;
if (!isnan(v.fl))
x_exit (i+1);
}
return 0;
}
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