ZArray is a C++ class (v1.2) that allows SIMD vector arrays to be indexed by integer equivalent in vector size vectors such as int8, int4, int2

LICENSE: FREE for commercial and non-commercial use, it is an ENJOYWARE and hope it speeds up your project for you. Credit mention always welcome, as usual.

NEW (v1.2): Can it be further optimized? YES it can be! Here's the update enjoy.

Example usage: 

ZArray<double4v> arr[1024], aVec = 0.0;
for (int i=0; i<1024; i++) {
    arr[i] = double4{ i, -i,  M_PI, -M_PI };
}
int4v idx = { 0, 1, 100, 500 };

aVec = arr[idx];  

// aVec now contains: { 0.0, -1.0, 3.1415, -3.1415 }

// lets change indexes to 10, 20, 30 and 40

idx = int4{ 10, 20, 30, 40 };

arr[idx] = aVec; 

// now the arr contains:
// arr[10][0] = 0.0; arr[20][1] = -1.0;  
// arr[30][2] = 3.1415; arr[40][3] = -3.1415

well you get the idea... 

Dmitry Boldyrev subband@gmail.com