From kito@kiae.su Sat Oct 26 17:28:30 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!kiae!kito From: kito@kiae.su (Karen Ito) Newsgroups: comp.sys.m68k Subject: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Oct26.172830.7501@kiae.su> Date: Sat, 26 Oct 1996 17:28:30 GMT Organization: Kurchatov Institute of Atomic Energy, Moscow NNTP-Posting-Host: kiae.su X-Newsreader: WinVN 0.99.5 Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. 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. Anyone running this on a Quadra 840AV with the 68040? -- Karen Ito *PLONK* filter active for trolls. Mac IIci / 68882 FPU - NetBSD 1.0 From nandersson@cern.ch Sun Oct 27 22:56:30 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!cern!nandersson From: nandersson@cern.ch (Nadia Andersson) Newsgroups: comp.sys.m68k Subject: Re: Observation: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Oct27.225630.2177@cern.ch> Date: Sun, 27 Oct 1996 22:56:30 GMT References: <1996Oct26.172830.7501@kiae.su> Organization: European Laboratory for Particle Physics, Geneva NNTP-Posting-Host: cern.ch X-Newsreader: TIN [version 1.2 PL2] Lines: 11 In article <1996Oct26.172830.7501@kiae.su>, kito@kiae.su (Karen Ito) 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. If you are posting from AOL, please read RFC 1036 before posting again. -- Nadia Andersson *PLONK* filter active for trolls. Amiga 1200 (Blizzard 030/50) - NetBSD 1.0