From nduarte@netcom.com Sat Mar 09 23:56:22 1996 Path: ashpoly!cascade!mxgate!coyoacan!netcom!nduarte From: nduarte@netcom.com (Natalia Duarte) Newsgroups: comp.sys.m68k Subject: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Mar09.235622.8967@netcom.com> Date: Sat, 09 Mar 1996 23:56:22 GMT Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: Netscape 1.1N Lines: 11 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. By passing the -mc68882 compiler flag in Think C, all sin/cos and sqrt operations compile directly to FPU opcodes. Anyone running this on a Quadra 840AV with the 68040? -- Natalia Duarte *PLONK* filter active for trolls. Acorn RiscPC 600 - NetBSD 1.0 From mandersson@netcom.com Sun Mar 10 10:12:22 1996 Path: ashpoly!bigsur!pacrim!krgate!eunha!netcom!mandersson From: mandersson@netcom.com (Morag Andersson) Newsgroups: comp.sys.m68k Subject: Re: [SPECULATION] Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Mar10.101222.9524@netcom.com> Date: Sun, 10 Mar 1996 10:12:22 GMT References: <1996Mar09.235622.8967@netcom.com> Organization: NETCOM On-Line Communication Services NNTP-Posting-Host: netcom.com X-Newsreader: WinVN 0.99.5 Lines: 10 In article <1996Mar09.235622.8967@netcom.com>, nduarte@netcom.com (Natalia Duarte) 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. -- Morag Andersson "Hardware is temporary. The signal survives." Macintosh IIfx / NEXTSTEP 3.3