From arobertson@pipeline.com Tue Feb 20 04:35:14 1996
Path: ashpoly!cascade!bigsur!pipeline!arobertson
From: arobertson@pipeline.com (Astrid Robertson)
Newsgroups: comp.sys.m68k
Subject: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Feb20.043514.1816@pipeline.com>
Date: Tue, 20 Feb 1996 04:35:14 GMT
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Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

Total execution time for a 20-minute audio track dropped from 48 minutes to 6.2 minutes.
By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.

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

-- 
=== Astrid Robertson ===
Dept of Electrical Engineering, The Pipeline Internet Network
"We don't sign stars. We build them."

From nlopez@clari.net Tue Feb 20 06:16:14 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!clari!nlopez
From: nlopez@clari.net (Nadia López)
Newsgroups: comp.sys.m68k
Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Feb20.061614.8414@clari.net>
Date: Tue, 20 Feb 1996 06:16:14 GMT
References: <1996Feb20.043514.1816@pipeline.com>
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In article <1996Feb20.043514.1816@pipeline.com>, arobertson@pipeline.com (Astrid Robertson) writes:
> Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining.

The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds.

-- 
=== Nadia López ===
Dept of Electrical Engineering, ClariNet Communications Corp
"Measuring a record you own is listening, not piracy."

From rlarsson@stanford.edu Tue Feb 20 17:24:14 1996
Path: ashpoly!cascade!transat!eunet-de!hansebox!stanford!rlarsson
From: rlarsson@stanford.edu (Rodrigo Larsson)
Newsgroups: comp.sys.m68k
Subject: Re: Data: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996Feb20.172414.7735@stanford.edu>
Date: Tue, 20 Feb 1996 17:24:14 GMT
References: <1996Feb20.043514.1816@pipeline.com> <1996Feb20.061614.8414@clari.net>
Organization: Stanford University Computer Systems Lab
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In article <1996Feb20.061614.8414@clari.net>, nlopez@clari.net (Nadia López) writes:
> The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds.

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

-- 
Rodrigo Larsson -- Stanford University Computer Systems Lab
"They will send a copy in my place."