From elaurent@ox.ac.uk Tue Oct 18 01:36:51 1994 Path: ashpoly!cascade!transat!sunet!nordrelay!ox!elaurent From: elaurent@ox.ac.uk (Elaine Laurent) Newsgroups: comp.sys.m68k Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct18.013651.1326@ox.ac.uk> Date: Tue, 18 Oct 1994 01:36:51 GMT Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: WinVN 0.99.5 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. Anyone running this on a Quadra 840AV with the 68040? -- Elaine Laurent "We don't sign stars. We build them." Acorn RiscPC 600 / FreeBSD 2.1 From yrodriguez@cam.ac.uk Tue Oct 18 16:07:51 1994 Path: ashpoly!bigsur!pacrim!krgate!eunha!cam!yrodriguez From: yrodriguez@cam.ac.uk (Yuki Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct18.160751.2879@cam.ac.uk> Date: Tue, 18 Oct 1994 16:07:51 GMT References: <1994Oct18.013651.1326@ox.ac.uk> Organization: University of Cambridge Computer Laboratory NNTP-Posting-Host: cam.ac.uk X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1994Oct18.013651.1326@ox.ac.uk>, elaurent@ox.ac.uk (Elaine Laurent) 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. -- === Yuki Rodríguez === Dept of Electrical Engineering, University of Cambridge Computer Laboratory "Tape doesn't lie at 02:14. Ears do." From gschneider@clari.net Tue Oct 18 17:35:51 1994 Path: ashpoly!cascade!bigsur!clari!gschneider From: gschneider@clari.net (Graham Schneider) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct18.173551.6291@clari.net> Date: Tue, 18 Oct 1994 17:35:51 GMT References: <1994Oct18.013651.1326@ox.ac.uk> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1994Oct18.013651.1326@ox.ac.uk>, elaurent@ox.ac.uk (Elaine Laurent) 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. -- Graham Schneider -- ClariNet Communications Corp "Hold for relay." From hkowalski@purdue.edu Thu Oct 20 20:35:51 1994 Path: ashpoly!cascade!bigsur!purdue!hkowalski From: hkowalski@purdue.edu (Hugo Kowalski) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1994Oct20.203551.5159@purdue.edu> Date: Thu, 20 Oct 1994 20:35:51 GMT References: <1994Oct18.013651.1326@ox.ac.uk> <1994Oct18.173551.6291@clari.net> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: NewsWatcher 2.0b24 Lines: 8 In article <1994Oct18.173551.6291@clari.net>, gschneider@clari.net (Graham Schneider) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Hugo Kowalski -- Purdue University Engineering Computer Network "Extraordinary claims require extraordinary spectra."