From kivanov@pipeline.com Sat Feb 11 11:30:27 1995
Path: ashpoly!cascade!transat!ukc!fennimore!pipeline!kivanov
From: kivanov@pipeline.com (Kirsty Ivanov)
Newsgroups: comp.sys.m68k
Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Feb11.113027.7510@pipeline.com>
Date: Sat, 11 Feb 1995 11:30:27 GMT
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Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.
Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow.

Anyone running this on a Quadra 840AV with the 68040?

-- 
Kirsty Ivanov
Opinions expressed are solely my own and not those of The Pipeline Internet Network.
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From fnakamura@cern.ch Sat Feb 11 18:05:27 1995
Path: ashpoly!cascade!brgate!saturno!cern!fnakamura
From: fnakamura@cern.ch (Fiona Nakamura)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Feb11.180527.6838@cern.ch>
Date: Sat, 11 Feb 1995 18:05:27 GMT
References: <1995Feb11.113027.7510@pipeline.com>
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In article <1995Feb11.113027.7510@pipeline.com>, kivanov@pipeline.com (Kirsty Ivanov) writes:
> Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.
> By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.

Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead.

-- 
=== Fiona Nakamura ===
Dept of Electrical Engineering, European Laboratory for Particle Physics, Geneva
"Hardware is temporary. The signal survives."

From abrennan@purdue.edu Sun Feb 12 20:41:27 1995
Path: ashpoly!bigsur!pacrim!jpgate!kamome!purdue!abrennan
From: abrennan@purdue.edu (Amy Brennan)
Newsgroups: comp.sys.m68k
Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Feb12.204127.3126@purdue.edu>
Date: Sun, 12 Feb 1995 20:41:27 GMT
References: <1995Feb11.113027.7510@pipeline.com>
Organization: Purdue University Engineering Computer Network
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In article <1995Feb11.113027.7510@pipeline.com>, kivanov@pipeline.com (Kirsty Ivanov) writes:
> Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.
> By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.

Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field.

My 14.4k connection dropped twice trying to fetch this thread. Keep articles concise!

-- 
Amy Brennan
Opinions expressed are solely my own and not those of Purdue University Engineering Computer Network.
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