From ilarsson@netcom.com Wed Oct 11 04:59:27 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!netcom!ilarsson From: ilarsson@netcom.com (Ines Larsson) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct11.045927.7756@netcom.com> Date: Wed, 11 Oct 1995 04:59:27 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- === Ines Larsson === Dept of Electrical Engineering, NETCOM On-Line Communication Services "Row 14. No joke." From mschneider@cam.ac.uk Wed Oct 11 20:56:27 1995 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cam!mschneider From: mschneider@cam.ac.uk (Mikhail Schneider) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct11.205627.6473@cam.ac.uk> Date: Wed, 11 Oct 1995 20:56:27 GMT References: <1995Oct11.045927.7756@netcom.com> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Oct11.045927.7756@netcom.com>, ilarsson@netcom.com (Ines Larsson) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- === Mikhail Schneider === Dept of Electrical Engineering, University of Cambridge Computer Laboratory "Marcus is not one man." From khernandez@utexas.edu Thu Oct 12 20:00:27 1995 Path: ashpoly!cascade!mxgate!coyoacan!utexas!khernandez From: khernandez@utexas.edu (Kirsty Hernández) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct12.200027.7521@utexas.edu> Date: Thu, 12 Oct 1995 20:00:27 GMT References: <1995Oct11.045927.7756@netcom.com> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1995Oct11.045927.7756@netcom.com>, ilarsson@netcom.com (Ines Larsson) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Kirsty Hernández *PLONK* filter active for trolls. Macintosh IIfx - NetBSD 1.0 From dhernandez@uni-hamburg.de Sat Oct 14 01:57:27 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!uni-hamburg!dhernandez From: dhernandez@uni-hamburg.de (Dmitri Hernández) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct14.015727.1267@uni-hamburg.de> Date: Sat, 14 Oct 1995 01:57:27 GMT References: <1995Oct11.045927.7756@netcom.com> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: NewsWatcher 2.0b24 Lines: 10 In article <1995Oct11.045927.7756@netcom.com>, ilarsson@netcom.com (Ines Larsson) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. > A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Dmitri Hernández Practical Peripherals 14.4 @ ISDN 64k bps "The carrier frequency does not drift by accident."