Changes between Version 4 and Version 5 of dev/optim/logbook


Ignore:
Timestamp:
Sep 2, 2011, 2:09:57 PM (8 years ago)
Author:
sam
Comment:

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  • dev/optim/logbook

    v4 v5  
    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 2% speed increase in `sin()` (ppu-lv2-g++)
    9  * [891] Do the Taylor series in two steps, for better pipelining at the cost of one extra multiplication: a notable 11% speed increase in `sin()` (ppu-lv2-g++)
     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)
    1010
    1111Note: 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: