SHL, SHR and the scary stuff inbetween. :)
Blitz3D Forums/Blitz3D Beginners Area/SHL, SHR and the scary stuff inbetween. :)
| ||
| I want to store data in a more efficient manner. This data is always either 0, 1, 2 or 3. Hence I decided to store it in blocks of four using Bit shifting, i.e.: which1 = 0 which2 = 2 which3 = 3 which4 = 2 (binary representation) 00 01 11 01 I 'compile' the data block thus: outwhich = which1 Or (which2 Shl 2) Or (which3 Shl 4) Or (which4 Shl 6) First off, is that right for the storage I desire? Secondly, how do I extract my which1, which2, which3 and which4 back out of "outwhich"? Looking at the Read/WritePixelFast bit shifting, I thought it should be: testwhich4 = outwhich Shr 6 testwhich3 = outwhich Shr 4 testwhich2 = outwhich Shr 2 testwhich1 = outwhich But that doesn't seem to work? I'm probably doing something really stupid, but any help would be appreciated. :) |
| ||
| Cheers to RetroBooster and HunterSD in #Blitzcoder. Turns out it was something stupid. :) testwhich4 = (outwhich Shr 6) And %11 testwhich3 = (outwhich Shr 4) And %11 testwhich2 = (outwhich Shr 2) And %11 testwhich1 = (outwhich) And %11 Cheers peeps. |
   |