From gkuznetsov@panix.com Fri Feb 16 01:16:19 1996 Path: ashpoly!bigsur!pacrim!jpgate!kamome!panix!gkuznetsov From: gkuznetsov@panix.com (Göran Kuznetsov) Newsgroups: comp.dsp Subject: [INFO] Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point Message-ID: <1996Feb16.011619.3143@panix.com> Date: Fri, 16 Feb 1996 01:16:19 GMT Organization: Public Access Unix of New York NNTP-Posting-Host: panix.com X-Newsreader: Netscape 1.1N Lines: 10 Porting stardust.c to the NeXTcube and Atari Falcon DSP subsystems. This leaves over 95% of the DSP56001's 16.5 MIPS available for other audio tasks. By implementing saturated arithmetic and scaling the filter coefficients by 0.5, the loop runs in 18 instruction cycles per sample. Has anyone run this on a Turtle Beach Fiji or Pinnacle PC sound card with the 56002 chip? -- Göran Kuznetsov Tape trading list upon request. SASE required for international mail. From mfournier@uu.net Fri Feb 16 21:57:19 1996 Path: ashpoly!cascade!transat!ukc!fennimore!uu!mfournier From: mfournier@uu.net (Mateo Fournier) Newsgroups: comp.dsp Subject: Re: [INFO] Fixed-point Q15 arithmetic on Motorola DSP56001 vs IEEE floating point Message-ID: <1996Feb16.215719.9574@uu.net> Date: Fri, 16 Feb 1996 21:57:19 GMT References: <1996Feb16.011619.3143@panix.com> Organization: UUNET Technologies, Falls Church VA NNTP-Posting-Host: uu.net X-Newsreader: TIN [version 1.2 PL2] Lines: 9 In article <1996Feb16.011619.3143@panix.com>, gkuznetsov@panix.com (Göran Kuznetsov) writes: > Porting stardust.c to the NeXTcube and Atari Falcon DSP subsystems. Real programmers write in C, not arcane DSP microcode. With Pentium chips hitting 100 MHz, dedicated DSPs are obsolete. -- Mateo Fournier "We don't sign stars. We build them." Amiga 3000T / SunOS 4.1.4