Hi,
I think you are using the version(D_SIMD) path, which is my (not
very successful) attempt at vectorizing the thing.
change the version(D_SIMD) line to version(none) and it will use
the scalar path, which has exactly the same dot() function as
yours.
On Friday, 31 May 2013 at 04:29:19 UTC, Juan Manuel Cabo wrote:
I just shaved 1.2 seconds trying with dmd by changing the dot
function from:
float dot(in Vec3 v1, in Vec3 v2)
{
auto t = v1.v * v2.v;
auto p = t.ptr;
return p[0] + p[1] + p[2];
}
to:
float dot(in Vec3 v1, in Vec3 v2)
{
auto one = v1.v.ptr;
auto two = v2.v.ptr;
return one[0] * two[0]
+ one[1] * two[1]
+ one[2] * two[2];
}
Before:
2 secs, 895 ms, 891 μs, and 7 hnsecs
After:
1 sec, 648 ms, 698 μs, and 1 hnsec
