However many operations natively handled without bitslicing are unlikely to gain any speed benefit this includes anything too simple (like the proposed XOR), or with grossly inefficient translation to gates (like modular multiplication, or looking up large arbitrary fixed tables, or sizable dynamic tables), or where the execution flow has too many paths. In principle, any cryptographic calculation performed on multiple instances can be bitsliced. This prevents side-channel attacks thru timing analysis (of the operation bitsliced), including the otherwise difficult to avoid cache-related timing attacks during table lookups for S-Tables. Also, the code is large and relatively complex conversion from normal to bitsliced form of arguments (and back for results) requires bit transposition, which adds some significant overhead lots of intermediary results or state data that would fit in registers or L1 cache in a normal implementation, do not.Īn upside, independently of speed: bitslicing a cryptographic operation removes any dependency of the duration to the data manipulated (because bitwise operators have fixed duration). On the downside of bitslicing: Most importantly, making $w$ simultaneous operations do not match all workloads! For a single large file and common modes of operation of a block cipher, only CTR (or the flawed ECB) is fully usable (CBC and CFB are usable for decryption only, OFB is unusable). As a bonus, it is extremely linear, that makes efficient scheduling of data accesses easier, and there's no branching delay. Most importantly, bitsliced code is immune to cache-related side channels (including timing). Increasingly many embedded CPUs support $w=32=2^5$, CPUs with AVX instructions even support $w=256=2^8$. simultaneously on all bits of such registers.ĭoing 1 generates a large number of gates: XOR of two $n$-bit words requires $n$ gates for $n>1$ their addition modulo $2^n$ requires $5n-6$ gates each 8-bit S-box lookup in AES SubBytes requires about 128 gates on the other hand rotations, arbitrary bit shuffling, selection or expansion requires no gate.ĭoing 2 implements $w$ gates per instruction manipulating $w$-bit registers, and most of the speedup (if any) comes from that parallelization by a factor of $w$ (caveat: the effective $w$ can't be larger than the number of computations to perform simultaneously). Executed in parallel, with as many simultaneous instances (on a single CPU) as there are bits in some register kind, performing NOR, XOR.Reduced to elementary operations (called gates) with a single bit output (typically NOR, XOR, and similar like OR AND NAND NXOR, often with further restriction to two inputs), rather than operations on words or integers spanning several bits.Alternatively, you may look up other free Basketball game collections on OnlineGames.io for further options.Bitslicing is a technique where computation is: Try Head Soccer Football, where you pick your favorite football player among the famous football players and compete if you love playing Head Basketball. Use the WASD or the arrow keys to move your player.You can control the difficulty level of your game.

Here, you will compete against artificial intelligence.

You can decide the match time yourself and organize matches that will last a minimum of 60 seconds and a maximum of 300 seconds.

You can play on a sunny day or when it's raining.

Besides deciding which part of the day you will play, you may make a decision on under which weather conditions you will play.

You may play during the day or at night if you want.

You can determine what time of day the basketball match will take place.

Once you decide which player you will play with, you also have the options to choose the type of basketball and the basketball court you will play on. You may make some customizations before starting the basketball match.

You can make your game funny and even have the most famous NBA player play a basketball game in high heels! Customization in Head Basketball You can choose your best-known basketball player in the NBA and decide which jersey and shoe to wear among several in a match. Head Basketball is a straightforward game to play, and it offers you a wide range of customization options. You must send the balls to your opponent's basket and make successful hits before your rival gets ahead of you. Are you ready for a basketball match with the most famous players in the NBA? Head Basketball is a one-on-one basketball game where you play as a renowned basketball player.

Bit slicer head basketball