Trailing-Edge
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PDP-10 Archives
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SRI_NIC_PERM_FS_1_19910112
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kcc-6/lib/test/mtest.c
There are 11 other files named mtest.c in the archive. Click here to see a list.
#include <stdio.h>
#include <math.h>
double atan2_table[] = {
-6.000000000000e-01, -5.000000000000e-01, -2.44685437739309e00,
0.000000000000e00, -1.000000000000e00, -1.57079632679490e00,
6.000000000000e-01, -5.000000000000e-01, -6.94738276196703e-01,
1.000000000000e00, 0.000000000000e00, 0.00000000000000e00,
6.000000000000e-01, 5.000000000000e-01, 6.94738276196703e-01,
0.000000000000e00, 1.000000000000e00, 1.57079632679490e00,
-6.000000000000e-01, 5.000000000000e-01, 2.44685437739309e00,
-1.000000000000e00, 0.000000000000e00, -3.14159265358979e00
};
double tanh_table[] = {
-8.000000000000000000e01, -1.000000000000000000e00,
-1.000000000000000000e01, -9.999999958776927635e-01,
-5.000000000000000000e-01, -4.621171572600097586e-01,
0.000000000000000000e00, 0.000000000000000000e00,
1.500000000000000000e00, 9.051482536448664383e-01,
1.000000000000000000e01, 9.999999958776927635e-01,
8.000000000000000000e01, 1.000000000000000000e00
};
double sinh_table[] = {
-8.000000000000000000e01, -2.770311192196755026e34,
-1.000000000000000000e01, -1.101323287470339337e04,
-5.000000000000000000e-01, -5.210953054937473615e-01,
0.000000000000000000e00, 0.000000000000000000e00,
1.500000000000000000e00, 2.129279455094817497e00,
1.000000000000000000e01, 1.101323287470339337e04,
8.000000000000000000e01, 2.770311192196755026e34
};
double cosh_table[] = {
-8.000000000000000000e01, 2.770311192196755026e34,
-1.000000000000000000e01, 1.101323292010332313e04,
-5.000000000000000000e-01, 1.127625965206380785e00,
0.000000000000000000e00, 1.000000000000000000e00,
1.500000000000000000e00, 2.352409615243247325e00,
1.000000000000000000e01, 1.101323292010332313e04,
8.000000000000000000e01, 2.770311192196755026e34
};
double log10_table[] = {
1.000000000000000000e-20,-2.000000000000000000e01,
1.000000000000000000e-05,-5.000000000000000000e00,
5.000000000000000000e-01,-3.010299956639811952e-01,
1.000000000000000000e00, 0.000000000000000000e00,
1.500000000000000000e00, 1.760912590556812420e-01,
1.000000000000000000e05, 5.000000000000000000e00,
1.000000000000000000e20, 2.000000000000000000e01
};
double tan_table[] = {
-2.000000000000000000e00, 2.185039863261518991e00,
-1.000000000000000000e00,-1.557407724654902230e00,
-5.000000000000000000e-01,-5.463024898437905132e-01,
0.000000000000000000e00, 0.000000000000000000e00,
5.000000000000000000e-01, 5.463024898437905132e-01,
1.000000000000000000e00, 1.557407724654902230e00,
2.000000000000000000e00,-2.185039863261518991e00
};
double asin_table[] = {
-1.000000000000000000e00, -1.570796326794896619e00,
-7.000000000000000000e-01, -7.753974966107530636e-01,
-1.999999999999999999e-01, -2.013579207903307914e-01,
0.000000000000000000e00, 0.000000000000000000e00,
1.999999999999999999e-01, 2.013579207903307914e-01,
7.000000000000000000e-01, 7.753974966107530636e-01,
1.000000000000000000e00, 1.570796326794896619e00
};
double acos_table[] = {
-1.000000000000000000e00, 3.141592653589793238e00,
-7.000000000000000000e-01, 2.346193823405649682e00,
-1.999999999999999999e-01, 1.772154247585227410e00,
0.000000000000000000e00, 1.570796326794896619e00,
1.999999999999999999e-01, 1.369438406004565827e00,
7.000000000000000000e-01, 7.953988301841435554e-01,
1.000000000000000000e00, 0.000000000000000000e00,
};
double log_table[] = {
4.999999999999999999e-02, -2.995732273553990993e00,
2.500000000000000000e-01, -1.386294361119890618e00,
5.000000000000000000e-01, -6.931471805599453094e-01,
1.000000000000000000e00, 0.000000000000000000e00,
2.000000000000000000e00, 6.931471805599453094e-01,
1.000000000000000000e01, 2.302585092994045684e00,
3.000000000000000000e01, 3.401197381662155375e00,
5.000000000000000000e01, 3.912023005428146058e00,
2.000000000000000000e02, 5.298317366548036677e00,
1.999999999999999999e32, 7.437587015636940721e01,
1.999999999999999999e-28, -6.377923542327333383e01
};
double sqrt_table[] = {
0.0, 0.0,
4.999999999999999999e-02, 2.236067977499789696e-01,
2.500000000000000000e-01, 5.000000000000000000e-01,
5.000000000000000000e-01, 7.071067811865475243e-01,
1.000000000000000000e00, 1.000000000000000000e00,
2.000000000000000000e00, 1.414213562373095048e00,
1.000000000000000000e01, 3.162277660168379332e00,
3.000000000000000000e01, 5.477225575051661134e00,
7.000000000000000000e01, 8.366600265340755481e00,
2.000000000000000000e02, 1.414213562373095049e01,
1.999999999999999999e32, 1.414213562373095048e16,
1.999999999999999999e-28, 1.414213562373095048e-14
};
double sin_table [] = {
5.00e-11, 5.000000000000000000e-11,
0.0,0.0,
5.00e-01, 4.794255386042030002e-01,
1.00e00, 8.414709848078965066e-01,
2.00e00, 9.092974268256816953e-01,
2.50e00, 5.984721441039564939e-01,
3.50e00,-3.507832276896198480e-01,
4.00e00,-7.568024953079282514e-01,
5.00e00,-9.589242746631384689e-01,
6.00e00,-2.794154981989258727e-01,
7.50e00, 9.379999767747388579e-01,
8.00e00, 9.893582466233817778e-01,
9.00e00, 4.121184852417565697e-01,
9.50e00,-7.515112046180930728e-02,
-5.00e-01,-4.794255386042030000e-01,
-1.00e00,-8.414709848078965066e-01,
-2.00e00,-9.092974268256816953e-01,
-2.50e00,-5.984721441039564939e-01,
-3.50e00, 3.507832276896198480e-01,
-4.00e00, 7.568024953079282514e-01,
-5.00e00, 9.589242746631384689e-01,
-5.50e00, 7.055403255703919063e-01,
-6.50e00,-2.151199880878155242e-01,
-7.50e00,-9.379999767747388579e-01,
-8.00e00,-9.893582466233817778e-01,
-9.00e00,-4.121184852417565697e-01,
-9.50e00, 7.515112046180930728e-02,
};
double cos_table [] = {
5.00e-11, 9.999999999999999997e-01,
0.00e00, 9.999999999999999997e-01,
5.00e-01, 8.77582561890372716e-01,
1.00e00, 5.403023058681397173e-01,
2.00e00,-4.161468365471423870e-01,
2.50e00,-8.011436155469337148e-01,
3.50e00,-9.364566872907963376e-01,
4.00e00,-6.536436208636119144e-01,
5.00e00, 2.836621854632262644e-01,
5.50e00, 7.086697742912599999e-01,
6.50e00, 9.765876257280234999e-01,
7.50e00, 3.466353178350258109e-01,
8.00e00,-1.455000338086135258e-01,
9.00e00,-9.111302618846769882e-01,
9.50e00,-9.971721561963784728e-01,
-5.00e-01, 8.775825618903727160e-01,
-1.00e00, 5.403023058681397173e-01,
-2.00e00,-4.161468365471423870e-01,
-2.50e00,-8.011436155469337148e-01,
-3.50e00,-9.364566872907963376e-01,
-4.00e00,-6.536436208636119144e-01,
-5.00e00, 2.836621854632262644e-01,
-6.00e00, 9.601702866503660205e-01,
-6.50e00, 9.765876257280234999e-01,
-7.50e00, 3.466353178350258109e-01,
-8.00e00,-1.455000338086135258e-01,
-9.00e00,-9.111302618846769882e-01,
-9.50e00,-9.971721561963784728e-01,
};
double atan_table [] = {
0.000000000000e00, 0.000000000000e00,
4.999999999999e-02, 4.995839572194e-02,
2.500000000000e-01, 2.449786631268e-01,
3.500000000000e-01, 3.366748193867e-01,
7.000000000000e-01, 6.107259643892e-01,
1.000000000000e00, 7.85398163397e-01,
2.000000000000e00, 1.10714871779e00,
1.400000000000e01, 1.49948886200e00,
3.000000000000e01, 1.53747533091e00,
5.000000000000e01, 1.55079899282e00,
7.000000000000e01, 1.55651158420e00,
9.000000000000e01, 1.55968567289e00,
2.000000000000e02, 1.56579636846e00
};
double exp_table[] = {
-40.0, 4.248354255291e-18,
-30.0, 9.357622968840e-14,
-20.0, 2.061153622438e-09,
-10.0, 4.539992976248e-05,
-2.0, 1.353352832366e-01,
0.0, 1.000000000000e00,
2.0, 7.389056098930e00,
10.0, 2.202646579480e04,
20.0, 4.851651954097e08,
30.0, 1.068647458152e13,
40.0, 2.353852668370e17,
};
struct test {
double (*func)();
double *table;
int entries;
char *name;
};
eval(fpntr)
register struct test *fpntr;
{
double rval, sval, svalref, zerr, kerr, errmax, fabs();
register double *tblpntr;
register int idx;
errmax = 0.0;
tblpntr = fpntr->table;
for (idx = 0; idx < fpntr->entries; idx++ ) {
rval = *tblpntr++;
sval = (*fpntr->func)(rval);
svalref = *tblpntr++;
zerr = (sval-svalref)/svalref;
kerr = fabs(zerr);
if (kerr > 1.0e-4) {
printf ("%s error for %g\n",fpntr->name,rval);
printf ("\tComputed value = %g\n",sval);
printf ("\tReference value = %g\n",svalref);
printf ("\tRelative error = %g\n\n",zerr);
}
if (kerr > errmax) {
errmax = kerr;
}
}
printf ("\t%s:\terrmax = %g\n",fpntr->name,errmax);
}
struct test tests[] = {
sin,sin_table,27,"SIN",
cos,cos_table,28,"COS",
tan,tan_table,7,"TAN",
sinh,sinh_table,7,"SINH",
cosh,cosh_table,7,"COSH",
tanh,tanh_table,7,"TANH",
asin,asin_table,7,"ASIN",
acos,acos_table,7,"ACOS",
atan,atan_table,13,"ATAN",
sqrt,sqrt_table,12,"SQRT",
exp,exp_table,11,"EXP",
log,log_table,11,"LOG",
log10,log10_table,7,"LOG10",
0,0,0,0
};
main()
{
register struct test *tp;
tp = &tests[0];
while (tp->func) {
eval(tp);
tp++;
}
do_atan2();
}
do_atan2()
{
double x, y, z, atan2();
register double *tblpntr;
double zref, zerr, kerr, errmax, fabs();
register int idx;
errmax = 0.0;
tblpntr = atan2_table;
for (idx = 0; idx < 8; idx++ ) {
x = *tblpntr++;
y = *tblpntr++;
z = atan2(x,y);
zref = *tblpntr++;
zerr = (z-zref)/zref;
kerr = fabs(zerr);
if (kerr > 1.0e-4) {
printf ("%s error for %g ","ATAN2",x);
printf ("%g\n",y);
printf ("\tComputed value = %g\n",z);
printf ("\tReference value = %g\n",zref);
printf ("\tRelative error = %g\n\n",zerr);
}
if (kerr > errmax) {
errmax = kerr;
}
}
printf ("\t%s:\terrmax = %g\n","ATAN2",errmax);
}