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/* Test of division. Subnormals.
$Id: div-02.c,v 1.1 2007/02/05 21:35:58 dmix Exp $
*/
#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 = z */
union lofl_u x, y, z;
} t[] = {
{ { 0x00000001 }, { 0x00000001 }, { .fl = 1 } },
{ { 0x00000002 }, { 0x00000001 }, { .fl = 2 } },
{ { 0x00000003 }, { 0x00000001 }, { .fl = 3 } },
{ { 0x00000004 }, { 0x00000001 }, { .fl = 4 } },
{ { 0x007fffff }, { 0x00000001 }, { .fl = 0x0.7fffffp+24 } },
{ { 0x00800000 }, { 0x00000001 }, { .fl = 0x0.800000p+24 } },
{ { 0x00800001 }, { 0x00000001 }, { .fl = 0x0.800001p+24 } },
{ { 0x00800002 }, { 0x00000001 }, { .fl = 0x0.800002p+24 } },
{ { 0x00ffffff }, { 0x00000001 }, { .fl = 0x0.ffffffp+24 } },
{ { 0x01000000 }, { 0x00000001 }, { .fl = 0x0.800000p+25 } },
{ { 0x34fffffe }, { 0x00000001 }, { 0x7f7ffffe } },
{ { 0x34ffffff }, { 0x00000001 }, { 0x7f7fffff } },
{ { 0x35000000 }, { 0x00000001 }, { 0x7f800000 } },
{ { 0x35000001 }, { 0x00000001 }, { 0x7f800000 } },
{ { 0x7f7fffff }, { 0x00000001 }, { 0x7f800000 } },
{ { 0x00000001 }, { 0x00000001 }, { .fl = 1 } },
{ { 0x00000001 }, { 0x00000002 }, { .fl = 0.5 } },
{ { 0x00000001 }, { 0x00000003 }, { .fl = 0.33333333 } },
{ { 0x00000001 }, { 0x00000004 }, { .fl = 0.25 } },
{ { 0x00000001 }, { 0x00100000 }, { .fl = 0x1p-20 } },
{ { 0x00000001 }, { 0x00800000 }, { .fl = 0x1p-23 } },
{ { 0x00000001 }, { .fl = 1.0 }, { .fl = 0x1p-149 } },
{ { 0x00000001 }, { .fl = 2.0 }, { .fl = 0 } },
};
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,z;
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);
z.lo = pgm_read_dword (& t[i].z);
v.fl = x.fl / y.fl;
/* Comparison is integer to verify the zero sign. */
if (v.lo != z.lo)
x_exit (i+1);
}
return 0;
}
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