Changes between Version 3 and Version 4 of dev/optim/logbook


Ignore:
Timestamp:
Sep 2, 2011, 1:53:00 PM (8 years ago)
Author:
sam
Comment:

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  • dev/optim/logbook

    v3 v4  
    88 * [890] Do the Taylor series on `x / π` instead of `x`: results in a measurable 2% speed increase in `sin()` (ppu-lv2-g++)
    99 * [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++)
     10
     11Note: 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:
     12
     13{{{
     14#!sh
     15touch trig.cpp
     16ps3ppusnc.exe -c trig.cpp -O3 -Xreorder=1 -Xfastmath=1 -o liblol_a-trig.o -I.
     17make
     18}}}
     19