[Mono-list] SSE - more specifically fast vector support
d3ck0r at gmail.com
Tue Oct 13 11:17:01 UTC 2015
> [Acceleration (AccelMode.SSE1)]
> public void Mult ( float scalar, out Vector4f r )
> /* actually this method was slower under mono; this is also fast under MS
> r.x = scalar * x; r.y = scalar * y; r.z = scalar * z; r.w = scalar *
I guess 'out' parameters aren't passed by reference. Changing out to ref...
public void Mult ( float scalar, ref Vector4f r )
r.x = scalar * x; r.y = scalar * y; r.z = scalar * z; r.w = scalar * w;
results in an increasd performance
operator mult = 17357
out mult = 10863
del = 62.5%
But; that means I can't use a math function to initialize a thing without
always creating a new one and copying that result (out).
Vector4f v1, v2;
v1.Mult( 3.0f, out v2 ); // is valid because ti makes sure all members of v2
v1.Mult( 3.0f, ref v2 ); // is less-than valid because it may not be that
all members of v2 are initialized...
ref and out are the same performance under MS.
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