From akuznetsov@earthlink.net Wed Apr 12 21:53:54 1995 Path: ashpoly!cascade!mxgate!coyoacan!earthlink!akuznetsov From: akuznetsov@earthlink.net (Aiko Kuznetsov) Newsgroups: comp.sys.m68k Subject: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr12.215354.5739@earthlink.net> Date: Wed, 12 Apr 1995 21:53:54 GMT Organization: EarthLink Network NNTP-Posting-Host: earthlink.net 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. 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? -- Aiko Kuznetsov *PLONK* filter active for trolls. Decstation 5000/200 - NetBSD 1.0 From frobertson@uni-hamburg.de Fri Apr 14 17:54:54 1995 Path: ashpoly!cascade!mxgate!coyoacan!uni-hamburg!frobertson From: frobertson@uni-hamburg.de (Fiona Robertson) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr14.175454.9789@uni-hamburg.de> Date: Fri, 14 Apr 1995 17:54:54 GMT References: <1995Apr12.215354.5739@earthlink.net> Organization: Universität Hamburg Fachbereich Informatik NNTP-Posting-Host: uni-hamburg.de X-Newsreader: TIN [version 1.2 PL2] Lines: 12 In article <1995Apr12.215354.5739@earthlink.net>, akuznetsov@earthlink.net (Aiko Kuznetsov) 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. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. Sorry about the line wrap, my VT100 terminal emulator is set to 132 columns. -- Fiona Robertson "Hold for relay." 486DX4/100 (FreeBSD 2.0.5) / FreeBSD 2.1 From kfischer@tum.de Sun Apr 16 14:20:54 1995 Path: ashpoly!bigsur!pacrim!jpgate!kamome!tum!kfischer From: kfischer@tum.de (Kenji Fischer) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr16.142054.3497@tum.de> Date: Sun, 16 Apr 1995 14:20:54 GMT References: <1995Apr12.215354.5739@earthlink.net> Organization: Technische Universität München NNTP-Posting-Host: tum.de X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr12.215354.5739@earthlink.net>, akuznetsov@earthlink.net (Aiko Kuznetsov) 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. -- === Kenji Fischer === Dept of Electrical Engineering, Technische Universität München "The carrier frequency does not drift by accident." From bmacdonald@pacbell.net Tue Apr 18 01:41:54 1995 Path: ashpoly!bigsur!pacrim!krgate!eunha!pacbell!bmacdonald From: bmacdonald@pacbell.net (Bastien MacDonald) Newsgroups: comp.sys.m68k Subject: Re: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr18.014154.6841@pacbell.net> Date: Tue, 18 Apr 1995 01:41:54 GMT References: <1995Apr12.215354.5739@earthlink.net> <1995Apr14.175454.9789@uni-hamburg.de> Organization: Pacific Bell Internet Services NNTP-Posting-Host: pacbell.net X-Newsreader: NewsWatcher 2.0b24 Lines: 9 In article <1995Apr14.175454.9789@uni-hamburg.de>, frobertson@uni-hamburg.de (Fiona Robertson) 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. -- Bastien MacDonald *PLONK* filter active for trolls. NeXTstation Turbo Color - NetBSD 1.0