[PD-dev] first auto-vector test

[Hans-Christoph Steiner]

I made two builds of Pd-0.39-2-extended-test6 on Mac OSX using gcc  
4.0.1, with differing CFLAGS.  I used the attached patch to measure  
the CPU usage, I tried to keep the operating circumstances equal, but  
this is a rough test.  But from this, the results look quite promising:

These flags are used in the standard build:

-Os -funroll-loops -fomit-frame-pointer -mcpu=powerpc -mtune=7450 - 
mpowerpc-gfxopt

The second is optimized for G4+:

-fast -fPIC -mcpu=7450 -mtune=7450 -ftree-vectorize -ftree-vectorizer- 
verbose=3

| filename                                             | G4+ | powerpc |
------------------------------------------------------------------------
feedback_delay_network.pd
         [linear 32 100 105(                               91    165
         [linear 65 10 15(                                228    237
         [exponential 64 1000 10(                         249    280
     (fdn~ NOT vectorized; d_soundfile.c, d_ctl.c, m_sched.c vectorized)

ramping_up_and_down.pd                                    61     64
doc/3.audio.examples/G90.pitchshift.pd                    95     97

My guess its the [readsf~] that is so much quicker in the feedback  
patch.

.hc

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