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/* Test of fma().
$Id: fma-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;
};
volatile union lofl_u v = { .lo = 1 };
PROGMEM const struct { /* Table of test cases: res=fma(x,y,z) */
union lofl_u x, y, z, res;
} t[] = {
/* 0.0 (and -0.0) */
{ { 0x00000000 }, { 0x00000000 }, { 0x00000000 }, { 0x00000000 } },
{ { 0x80000000 }, { 0x00000000 }, { 0x00000000 }, { 0x00000000 } },
{ { 0x00000000 }, { 0x80000000 }, { 0x00000000 }, { 0x00000000 } },
{ { 0x80000000 }, { 0x80000000 }, { 0x00000000 }, { 0x00000000 } },
{ { 0x00000000 }, { 0x00000000 }, { 0x80000000 }, { 0x00000000 } },
{ { 0x80000000 }, { 0x00000000 }, { 0x80000000 }, { 0x80000000 } },
{ { 0x00000000 }, { 0x80000000 }, { 0x80000000 }, { 0x80000000 } },
{ { 0x80000000 }, { 0x80000000 }, { 0x80000000 }, { 0x00000000 } },
{ { .fl = 1 }, { .fl = 2 }, { .fl = 3 }, { .fl = 5 } },
{ { .fl = -1 }, { .fl = 2 }, { .fl = 3 }, { .fl = 1 } },
{ { .fl = 1 }, { .fl = -2 }, { .fl = 3 }, { .fl = 1 } },
{ { .fl = -1 }, { .fl = -2 }, { .fl = 3 }, { .fl = 5 } },
{ { .fl = 1 }, { .fl = 2 }, { .fl = -3 }, { .fl = -1 } },
{ { .fl = -1 }, { .fl = 2 }, { .fl = -3 }, { .fl = -5 } },
{ { .fl = 1 }, { .fl = -2 }, { .fl = -3 }, { .fl = -5 } },
{ { .fl = -1 }, { .fl = -2 }, { .fl = -3 }, { .fl = -1 } },
};
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, res;
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);
res.lo = pgm_read_dword (& t[i].res);
v.fl = fma (x.fl, y.fl, z.fl);
if (v.lo != res.lo)
x_exit (i+1);
}
return 0;
}
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