shuffleMix abstract method
Mixes lanes chosen from two Float32x4 values using a mask.
Creates a new Float32x4 where the x and y lanes are chosen
from the lanes of this value selected by the first two letters of the
mask's name, and the z and w lanes are the lanes of other
selected by the last two letters of the mask's name.
For example, v1.shuffleMix(v2, Float32x4.xyzw) is equivalent
to Float32x4(v1.x, v1.y, v2.z, v2.w).
If other is the same value as this Float32x4, this function
is the same as shuffle. That is, doing
v1.shuffleMix(v1, mask) is equivalent to v1.shuffle(mask).
Implementation
Float32x4 shuffleMix(Float32x4 other, int mask);