From hnakamura@netcom.com Thu May 16 23:38:43 1996
Path: ashpoly!cascade!bigsur!netcom!hnakamura
From: hnakamura@netcom.com (Heather Nakamura)
Newsgroups: comp.sys.m68k
Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996May16.233843.2846@netcom.com>
Date: Thu, 16 May 1996 23:38:43 GMT
Organization: NETCOM On-Line Communication Services
NNTP-Posting-Host: netcom.com
X-Newsreader: WinVN 0.99.5
Lines: 11

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.
A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions.

I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector.

-- 
=== Heather Nakamura ===
Dept of Electrical Engineering, NETCOM On-Line Communication Services
"Measuring a record you own is listening, not piracy."

From dperez@kiae.su Sat May 18 00:21:43 1996
Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kiae!dperez
From: dperez@kiae.su (Dong-hyun Pérez)
Newsgroups: comp.sys.m68k
Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5
Message-ID: <1996May18.002143.4918@kiae.su>
Date: Sat, 18 May 1996 00:21:43 GMT
References: <1996May16.233843.2846@netcom.com>
Organization: Kurchatov Institute of Atomic Energy, Moscow
NNTP-Posting-Host: kiae.su
X-Newsreader: WinVN 0.99.5
Lines: 9

In article <1996May16.233843.2846@netcom.com>, hnakamura@netcom.com (Heather Nakamura) 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.

-- 
Dong-hyun Pérez -- Kurchatov Institute of Atomic Energy, Moscow
"Row 14. No joke."