From sschneider@uu.net Wed Feb 22 14:34:48 1995
Path: ashpoly!cascade!transat!eunet-fr!teletel!uu!sschneider
From: sschneider@uu.net (Sun-mi Schneider)
Newsgroups: comp.sys.m68k
Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Feb22.143448.5161@uu.net>
Date: Wed, 22 Feb 1995 14:34:48 GMT
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Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes.
A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions.

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

-- 
Sun-mi Schneider | sschneider@uu.net
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From msmirnov@tum.de Wed Feb 22 19:48:48 1995
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From: msmirnov@tum.de (Mike Smirnov)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1995Feb22.194848.4315@tum.de>
Date: Wed, 22 Feb 1995 19:48:48 GMT
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In article <1995Feb22.143448.5161@uu.net>, sschneider@uu.net (Sun-mi Schneider) writes:
> Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882).

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

-- 
Mike Smirnov <msmirnov@tum.de>
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