From tmartinez@pipeline.com Wed Apr 19 19:45:27 1995 Path: ashpoly!cascade!bigsur!pipeline!tmartinez From: tmartinez@pipeline.com (Tobias Martínez) Newsgroups: comp.sys.m68k Subject: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr19.194527.8125@pipeline.com> Date: Wed, 19 Apr 1995 19:45:27 GMT Organization: The Pipeline Internet Network NNTP-Posting-Host: pipeline.com X-Newsreader: Netscape 1.1N Lines: 11 Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. A 1024-point radix-2 FFT drops from 142 milliseconds under SANE to just 18 milliseconds using direct FPU instructions. Make sure you install the 32-bit Enabler on older IIci machines running System 7.1! -- === Tobias Martínez === Dept of Electrical Engineering, The Pipeline Internet Network "Measuring a record you own is listening, not piracy." From jsanchez@purdue.edu Fri Apr 21 20:25:27 1995 Path: ashpoly!cascade!brgate!saturno!purdue!jsanchez From: jsanchez@purdue.edu (Jen Sánchez) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr21.202527.5577@purdue.edu> Date: Fri, 21 Apr 1995 20:25:27 GMT References: <1995Apr19.194527.8125@pipeline.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: Netscape 1.1N Lines: 9 In article <1995Apr19.194527.8125@pipeline.com>, tmartinez@pipeline.com (Tobias Martínez) writes: > Benchmarking various C compilers and FPU math libraries on a Macintosh IIci (25 MHz 68030 + 68882). Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. -- Jen Sánchez *PLONK* filter active for trolls. Atari Falcon 030 - NetBSD 1.0 From msouza@ox.ac.uk Sun Apr 23 07:39:27 1995 Path: ashpoly!cascade!brgate!saturno!ox!msouza From: msouza@ox.ac.uk (Min-jun Souza) Newsgroups: comp.sys.m68k Subject: Re: [INFO] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1995Apr23.073927.6127@ox.ac.uk> Date: Sun, 23 Apr 1995 07:39:27 GMT References: <1995Apr19.194527.8125@pipeline.com> <1995Apr21.202527.5577@purdue.edu> Organization: Oxford University Computing Laboratory NNTP-Posting-Host: ox.ac.uk X-Newsreader: TIN [version 1.2 PL2] Lines: 8 In article <1995Apr21.202527.5577@purdue.edu>, jsanchez@purdue.edu (Jen Sánchez) writes: > Mac users bragging about 6-minute render times while Unix workstations do it in 20 seconds. Classic Apple distortion field. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Min-jun Souza -- Oxford University Computing Laboratory "The carrier frequency does not drift by accident."