From mfournier@delphi.com Wed Jun 05 15:07:37 1996 Path: ashpoly!cascade!brgate!saturno!delphi!mfournier From: mfournier@delphi.com (Marta Fournier) Newsgroups: comp.sys.m68k Subject: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun05.150737.6177@delphi.com> Date: Wed, 05 Jun 1996 15:07:37 GMT Organization: Delphi Internet Services NNTP-Posting-Host: delphi.com X-Newsreader: TIN [version 1.2 PL2] Lines: 11 Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Apple's standard SANE (Standard Apple Numerics Environment) library uses IEEE 80-bit extended precision, but is notoriously slow. 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? -- Marta Fournier "They will send a copy in my place." Mac IIci / 68882 FPU / NEXTSTEP 3.3 From keriksson@purdue.edu Wed Jun 05 16:11:37 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!purdue!keriksson From: keriksson@purdue.edu (Katrin Eriksson) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun05.161137.9171@purdue.edu> Date: Wed, 05 Jun 1996 16:11:37 GMT References: <1996Jun05.150737.6177@delphi.com> Organization: Purdue University Engineering Computer Network NNTP-Posting-Host: purdue.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jun05.150737.6177@delphi.com>, mfournier@delphi.com (Marta Fournier) writes: > Compiling stardust.c with Think C 6.0 vs MPW C with direct 68882 inlining. Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. -- === Katrin Eriksson === Dept of Electrical Engineering, Purdue University Engineering Computer Network "The carrier frequency does not drift by accident." From tnakamura@clari.net Fri Jun 07 04:38:37 1996 Path: ashpoly!cascade!transat!ukc!fennimore!clari!tnakamura From: tnakamura@clari.net (Tobias Nakamura) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun07.043837.1462@clari.net> Date: Fri, 07 Jun 1996 04:38:37 GMT References: <1996Jun05.150737.6177@delphi.com> <1996Jun05.161137.9171@purdue.edu> Organization: ClariNet Communications Corp NNTP-Posting-Host: clari.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jun05.161137.9171@purdue.edu>, keriksson@purdue.edu (Katrin Eriksson) writes: > Beware of System 7.5.1 memory leaks if you allocate large sample buffers in the application heap. Use NewPtrSys instead. The 68040 on the Quadra is a monster -- the on-chip FPU executes FFT butterflies in less than 4 milliseconds. -- Tobias Nakamura Hayes Optima 288 @ 9600 Telebit bps "In theory there is no difference between theory and practice." From mlopez@illinois.edu Fri Jun 07 14:16:37 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!illinois!mlopez From: mlopez@illinois.edu (Mateo López) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun07.141637.2764@illinois.edu> Date: Fri, 07 Jun 1996 14:16:37 GMT References: <1996Jun05.150737.6177@delphi.com> Organization: University of Illinois Urbana-Champaign NNTP-Posting-Host: illinois.edu X-Newsreader: WinVN 0.99.5 Lines: 9 In article <1996Jun05.150737.6177@delphi.com>, mfournier@delphi.com (Marta Fournier) 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. -- Mateo López | mlopez@illinois.edu PGP Key fingerprint: 4457 052E EBA1 7DDC "Keep the channels open." From vlee@earthlink.net Sat Jun 08 10:35:37 1996 Path: ashpoly!cascade!transat!eunet-fi!relcom!kiae!earthlink!vlee From: vlee@earthlink.net (Valeria Lee) Newsgroups: comp.sys.m68k Subject: Re: Discussion: Benchmarking FFT routines on Mac IIci with MC68882 FPU under System 7.5 Message-ID: <1996Jun08.103537.3496@earthlink.net> Date: Sat, 08 Jun 1996 10:35:37 GMT References: <1996Jun05.150737.6177@delphi.com> <1996Jun05.161137.9171@purdue.edu> <1996Jun07.043837.1462@clari.net> Organization: EarthLink Network NNTP-Posting-Host: earthlink.net X-Newsreader: Netscape 1.1N Lines: 9 In article <1996Jun07.043837.1462@clari.net>, tnakamura@clari.net (Tobias Nakamura) 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. -- Valeria Lee "Row 14. No joke." Acorn RiscPC 600 / NEXTSTEP 3.3