Changes between Version 5 and Version 6 of dev/optim/logbook


Ignore:
Timestamp:
Sep 2, 2011, 4:33:04 PM (8 years ago)
Author:
sam
Comment:

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  • dev/optim/logbook

    v5 v6  
    66
    77 * [885] [886] [888] Started importing Ryan Sammartino's PS3 trigonometry library in the core ().
    8  * [890] Do the Taylor series on `x / π` instead of `x`: results in a measurable speed increase in `sin()` (2% with ppu-lv2-g++, almost 1% with SNC)
    9  * [891] Do the Taylor series in two steps, for better pipelining at the cost of one extra multiplication: a notable speed increase in `sin()` (11% with ppu-lv2-g++, 2% with SNC)
     8 * [890] Do the Taylor series on `x / π` instead of `x`: results in a measurable speed increase in `sin()`
     9   * 2% with ppu-lv2-g++ 4.1.1 on a PS3
     10   * almost 1% with SNC 360.1 on a PS3
     11   * 30% with g++ 4.5.2 on mingw32 running on a Core2Quad
     12 * [891] Do the Taylor series in two steps, for better pipelining at the cost of one extra multiplication: a notable speed increase in `sin()`
     13   * 11% with ppu-lv2-g++ 4.1.1 on a PS3
     14   * 2% with SNC 360.1 on a PS3
     15   * 7% with g++ 4.5.2 on mingw32 running on a Core2Quad
    1016
    1117Note: there is currently no way to build all the engine using SNC. However, individual files can be built using a command along the following one: