HLSL: Index to unaligned/packed floats

Question

I have a vertex shader (2.0) doing some instancing - each vertex specifies an index into an array.

If I have an array like this:

float instanceData[100];         


        

Answer 1

Does that helps?:

float4 packedInstanceData[25];
...
float data = packedInstanceData[index / 4][index % 4];