pspgu slicing

pspgu test - texture slicing

slicing technique is used to reduce cache-misses during the rendering.
the texture is rendered using several power-of-two width slices.

slice width -> fps
1           -> 75
2           -> 125
4           -> 176
8           -> 226
16          -> 261
32          -> 266
64          -> 279 better choice :)
128         -> 221
256         -> 54
512         -> 54

using a 512*512 A8B8G8R8 texture.