I have a little loop which is either 1, 2 or 4 iterations long.
I want it unrolled by the compiler so its index should be a param.
Its upper and lower limits are all param which are 0 and #size.
param block = 0 .. #size
where size is a param itself.
Chapel complains in its 3 usages below, namely
[param b in block]
and
for b in block
What am I doing wrong?
Yes, I can manually unroll the loop myself and have three instances of the
routine but that is messy.
The usage is below.
inline proc vmRot(jk : range, r : int, param size : int, q : [] ?C, u : [] ?R)
{
const (j, k) = (jk.first, jk.last);
param block = 0..#size;
var x = [param b in block] u[r + b, j];
for i in j+1 .. k do
{
const gi = g[i];
const c = gi.re;
const s = -gi.im;
for param b in block do
{
const yi = u[r + b, i];
const xi = x[b];
const cxi = c * xi;
const cyi = c * yi;
u[r + s, i - 1] = cxi - s * yi;
x[s] = cyi + s * xi;
}
}
[param b in block] u[r + b, k] = x[s];
}
Thanks - Damian
Pacific Engineering Systems International, 277-279 Broadway, Glebe NSW 2037
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