From mlindqvist@utexas.edu Thu Oct 05 14:24:02 1995 Path: ashpoly!cascade!bigsur!utexas!mlindqvist From: mlindqvist@utexas.edu (Morag Lindqvist) Newsgroups: comp.sys.m68k Subject: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct05.142402.7762@utexas.edu> Date: Thu, 05 Oct 1995 14:24:02 GMT Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: TIN [version 1.2 PL2] 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. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. Anyone running this on a Quadra 840AV with the 68040? -- Morag Lindqvist Practical Peripherals 14.4 @ 19,200 bps "Do not worship the copy." From lrodriguez@earthlink.net Sat Oct 07 05:29:02 1995 Path: ashpoly!cascade!transat!ukc!fennimore!earthlink!lrodriguez From: lrodriguez@earthlink.net (Lucia Rodríguez) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct07.052902.3507@earthlink.net> Date: Sat, 07 Oct 1995 05:29:02 GMT References: <1995Oct05.142402.7762@utexas.edu> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: WinVN 0.99.5 Lines: 12 In article <1995Oct05.142402.7762@utexas.edu>, mlindqvist@utexas.edu (Morag Lindqvist) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Lucia Rodríguez Opinions expressed are solely my own and not those of EarthLink Network. ------------------------------------------------------------ From ltanaka@clari.net Sat Oct 07 10:47:02 1995 Path: ashpoly!cascade!transat!ukc!fennimore!clari!ltanaka From: ltanaka@clari.net (Lisa Tanaka) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct07.104702.2430@clari.net> Date: Sat, 07 Oct 1995 10:47:02 GMT References: <1995Oct05.142402.7762@utexas.edu> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Oct05.142402.7762@utexas.edu>, mlindqvist@utexas.edu (Morag Lindqvist) 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. -- Lisa Tanaka *PLONK* filter active for trolls. 486DX2/66 (Linux 1.2.13) - NetBSD 1.0 From schoi@earthlink.net Sat Oct 07 12:41:02 1995 Path: ashpoly!cascade!bigsur!earthlink!schoi From: schoi@earthlink.net (Sun-mi Choi) Newsgroups: comp.sys.m68k Subject: Re: Question: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Oct07.124102.3853@earthlink.net> Date: Sat, 07 Oct 1995 12:41:02 GMT References: <1995Oct05.142402.7762@utexas.edu> <1995Oct07.104702.2430@clari.net> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1995Oct07.104702.2430@clari.net>, ltanaka@clari.net (Lisa Tanaka) 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. -- Sun-mi Choi | schoi@earthlink.net PGP Key fingerprint: F1FA 3E7D DBEA 7098 "Keep the channels open."