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/* $XFree86: $ */
global f_ref = 14318000;
function s3_clock (m, n, r)
{
return f_ref * (m + 2) / ((n + 2) * (2 ^ r));
}
function s3_near (f1, f2)
{
return abs (f1 - f2) < f1 / 10;
}
function s3_clocks (f)
{
auto m, n, r, ft;
auto dist, min_dist;
auto min_m, min_n, min_r;
min_dist = f / 5;
for (r = 0; r <= 3; r++)
for (n = 0; n <= 31; n++)
for (m = 0; m <= 127; m++)
{
ft = s3_clock (m, n, r);
if (s3_near (ft, f))
printf ("m %d n %d r %d = %d\n",
m, n, r, ft);
dist = abs (f - ft);
if (dist < min_dist)
{
min_dist = dist;
min_m = m;
min_n = n;
min_r = r;
}
}
printf ("m %d n %d r %d f %d dist %d\n",
min_m, min_n, min_r, s3_clock(min_m, min_n, min_r), min_dist);
}
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