enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Branch predictor - Wikipedia

    en.wikipedia.org/wiki/Branch_predictor

    Branch prediction attempts to guess whether a conditional jump will be taken or not. Branch target prediction attempts to guess the target of a taken conditional or unconditional jump before it is computed by decoding and executing the instruction itself. Branch prediction and branch target prediction are often combined into the same circuitry.

  3. Predication (computer architecture) - Wikipedia

    en.wikipedia.org/wiki/Predication_(computer...

    Elimination of unnecessary branch instructions can make the execution of necessary branches, such as those that make up loops, faster by lessening the load on branch prediction mechanisms. Elimination of the cost of a branch misprediction which can be high on deeply pipelined architectures.

  4. Branch (computer science) - Wikipedia

    en.wikipedia.org/wiki/Branch_(computer_science)

    Historically, branch prediction took statistics, and used the result to optimize code. A programmer would compile a test version of a program, and run it with test data. The test code counted how the branches were actually taken. The statistics from the test code were then used by the compiler to optimize the branches of released code.

  5. Branch target predictor - Wikipedia

    en.wikipedia.org/wiki/Branch_target_predictor

    As predicted branches happen every 10 instructions or so, this can force a substantial drop in fetch bandwidth. Some machines with longer instruction cache latencies would have an even larger loss. To ameliorate the loss, some machines implement branch target prediction: given the address of a branch, they predict the target of that branch.

  6. Speculative execution - Wikipedia

    en.wikipedia.org/wiki/Speculative_execution

    This approach is employed in a variety of areas, including branch prediction in pipelined processors, value prediction for exploiting value locality, prefetching memory and files, and optimistic concurrency control in database systems. [1] [2] [3] Speculative multithreading is a special case of speculative execution.

  7. Alpha 21264 - Wikipedia

    en.wikipedia.org/wiki/Alpha_21264

    The global predictor is a single-level, 4096-entry branch history table. Each entry is a 2-bit saturating counter; the value of this counter determines whether the current branch is taken or not taken. The choice predictor records the history of the local and global predictors to determine which predictor is the best for a particular branch.

  8. AOL Mail

    mail.aol.com/m

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Chi-square automatic interaction detection - Wikipedia

    en.wikipedia.org/wiki/Chi-square_automatic...

    CHAID can be used for prediction (in a similar fashion to regression analysis, this version of CHAID being originally known as XAID) as well as classification, and for detection of interaction between variables. [4] [5] [6]