From owner-freebsd-current  Sat Jun 16  2:38:31 2001
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Date: Sat, 16 Jun 2001 18:38:08 +0900 (JST)
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To: current@freebsd.org
Subject: support Pentium3 SSE
From: kaz@kobe1995.net (NAKAMURA Kazushi)
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------- Forwarded Message
Date: Thu, 14 Jun 2001 04:20:46 +0900 (JST)
Message-Id: <200106131920.EAA15922@ns.kobe1995.net>
To: freebsd-current@FreeBSD.org
Subject: support Pentium3 SSE
From: kaz@kobe1995.net (NAKAMURA Kazushi)

  Hello! Don't lose to Linux2.4.x!
I use FreeBSD as graphic workstation. I made a patch for support
Pentium3's SSE extension. The PR# is kern/28070 .

http://www.freebsd.org/cgi/query-pr.cgi?pr=28070

  And there are WWW pages about SSE on FreeBSD environment.

#(poor) english
http://kobe1995.net/~kaz/FreeBSD/SSE.en.html
#(native) japanese
http://kobe1995.net/~kaz/FreeBSD/SSE.html
#test code
http://kobe1995.net/~kaz/FreeBSD/loop.C.gz

  MMX instructions can be used without any difficult. But SSE
instructions are needs kernel support. I tested ONLY single
cuppermine celeron. Please test Pentium3/4 or SMP environment.
I afraid that it does NOT work in SMP environment, because the
access of (static) svxmm may conflicts. Allocate in stack,
insted static, is difficult to align 16 Byte boundary.
#Most SSE instructions are needs 16Byte alignment.
Any good idea?

  SSE instructions are effective to audio or visual applications.
For example, MP3 encoding by celeron/667@750MHz:
###without SSE(may be using MMX)
% gogo -lang eng -nopsy -test -off sse
GOGO-no-coda ver. 2.39  (Jun  8 2001)
Copyright (C) 1999, 2000 PEN@MarineCat and shigeo
    Special thanks to Keiichi SAKAI, URURI, Noisyu and Kei
test time 600sec
 *** at bench in the early afternoon [benchmark mode] ***
MPEG 1, layer 3 j-stereo
inp sampling-freq=44.1kHz out sampling-freq=44.1kHz bitrate=128kbps
input  file `stdin'
output file `default.mp3'
{  22968/  22968} 100.0% (  16.93x)  re:[00:00:00.00] to:[00:00:35.43]
End of encoding
time=  35.433sec ( 16.93x)
       ^^^^^^
###with SSE
% gogo -lang eng -nopsy -test 
GOGO-no-coda ver. 2.39  (Jun  8 2001)
Copyright (C) 1999, 2000 PEN@MarineCat and shigeo
    Special thanks to Keiichi SAKAI, URURI, Noisyu and Kei
test time 600sec
 *** at bench in the early afternoon [benchmark mode] ***
MPEG 1, layer 3 j-stereo
inp sampling-freq=44.1kHz out sampling-freq=44.1kHz bitrate=128kbps
input  file `stdin'
output file `default.mp3'
{  22968/  22968} 100.0% (  35.58x)  re:[00:00:00.00] to:[00:00:16.86]
End of encoding
time=  16.852sec ( 35.60x)
       ^^^^^^
  Thank you!
------- End of Forwarded Message
-- 
<mailto:kaz@kobe1995.net>	NAKAMURA Kazushi@KOBE
<http://kobe1995.net/~kaz/index-e.html>

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