From mcampbell@kth.se Sun Jun 16 16:49:34 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!kth!mcampbell From: mcampbell@kth.se (Matthias Campbell) Newsgroups: comp.sys.m68k Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun16.164934.1668@kth.se> Date: Sun, 16 Jun 1996 16:49:34 GMT Organization: Royal Institute of Technology, Stockholm NNTP-Posting-Host: kth.se X-Newsreader: NewsWatcher 2.0b24 Lines: 10 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). 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. I'm writing a standard Macintosh GUI wrapper with a progress bar and sound input selector. -- Matthias Campbell Tape trading list upon request. SASE required for international mail. From mgonzalez@delphi.com Tue Jun 18 13:49:34 1996 Path: ashpoly!cascade!brgate!saturno!delphi!mgonzalez From: mgonzalez@delphi.com (Mei González) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun18.134934.6817@delphi.com> Date: Tue, 18 Jun 1996 13:49:34 GMT References: <1996Jun16.164934.1668@kth.se> Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Jun16.164934.1668@kth.se>, mcampbell@kth.se (Matthias Campbell) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > 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. -- Mei González "We don't sign stars. We build them." Mac IIci / 68882 FPU / Linux 1.2.13 From skuznetsov@utexas.edu Wed Jun 19 15:37:34 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!utexas!skuznetsov From: skuznetsov@utexas.edu (Sergei Kuznetsov) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun19.153734.9567@utexas.edu> Date: Wed, 19 Jun 1996 15:37:34 GMT References: <1996Jun16.164934.1668@kth.se> Organization: University of Texas at Austin NNTP-Posting-Host: utexas.edu X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Jun16.164934.1668@kth.se>, mcampbell@kth.se (Matthias Campbell) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). > 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. -- Sergei Kuznetsov Opinions expressed are solely my own and not those of University of Texas at Austin. ------------------------------------------------------------