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A couple of questions on lisp compiler/optimization art 1 79 (3/3/2010 12:11:45 AM) comp.lang.lisp Hi there, Much as enjoy lisp, I still spend quite a bit of my time worrying about single-instruction details of generated C code (embedded DSP applications). I was wondering, this morning, whether the s... Andrew

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Floating point vs fixed arithmetics (signed 64-bit) 53 32 (3/26/2012 9:22:21 AM) comp.arch.embedded Hi friends, I am working on stellaris LM3s6965 (cortex-m3) & Keil 4.20 for data acquisition. ADC is signed 24-bit. To perform software Gain calibration I have two options, 1. 64-bit fixed width arithmeti... kiishor (31)

Working out what's possible and what's not in DSP 27 19 (12/19/2011 12:51:01 PM) comp.dsp Hi all, So, the background to this is that it's 11 years since I finished undergrad DSP, and haven't touched it since (RF and microwave hardware is my day job). Consequently, I'm very rusty on the theory and ... enchelmaier (2)

[OT??] {32 vs 64 bit} &/or {single vs multi core} ??? 6 36 (11/26/2011 2:02:41 AM) comp.dsp {also posted to a Linux group} In the "real world", is there a difference for an average/typical user. I'm contemplating the move from Windows to Linux. Coward that I am, I'm considering separate hardware as ... rowlett (356)

[FFT] Why is the performance so important? 13 32 (11/14/2011 1:22:46 PM) comp.dsp Hello DSP pros, I'm currently working on an optimized version of FFT for ARM NEON. (FHT, to be exact.) I'm neither a DSP specialist nor mathematician, and it was very hard for me to understand the way FFT wor... matrose (3)

OK, Maybe the ADA folks are right 9 39 (10/27/2011 12:09:40 AM) comp.arch.embedded This compiles: ((adc_ping_pong) ? osc_vector : gyro_vector)[fill_vector][fill_ix] = raw_data; I have every confidence that it would work as intended in lieu of if (adc_ping_pong) { osc_vector[fill_vect... tim177 (4406)

LISP AI folklore 69 41 (10/15/2011 8:58:30 PM) comp.ai.philosophy Those rent-a-coder programming wags over at http://dis.4chan.org/read/prog/1318706528 have launched "Occupy Comp.Lang.Lisp" with a thread unrighteously entitled, "Ask John McCarthy anything". Sorry, script k... mentifex (216)

Performance: loops and arithmetic 9 23 (10/9/2011 2:37:44 PM) comp.lang.lisp So, once again I'm trying to assess what bottlenecks I would encounter when using CL instead of C/C++ for high-performance programming. This time, I tried to transform the following C++ program into CL: #in... lasse-usenet-2011 (20)

Infinity + Infinity (or NegInfinity - NegInfinity) 49 43 (10/8/2011 12:54:30 AM) comp.lang.c Hello, I was just wondering what happens if "Infinity" is added to "Infinity" when it comes to floating point numbers ? And also what happens if "Negative Infinity" is added to "Negative Infinity"... ? In ... Windows7IsOK (161)

OT Why DSP consultants are (by and large) well paid 183 50 (9/29/2011 3:31:52 AM) comp.dsp http://cdn.videosift.com/static/Miss-USA-2011-Should-Math-Be-Taught-In-Schools/index.html?1315892583 God help us! Jerry -- Engineering is the art of making what you want from things you can get. ... jya (12866)

DrRacket and Tiny Scheme portability problem 11 34 (7/14/2011 8:00:31 PM) comp.lang.scheme Folks, I've just started doing my first Scheme coding ! I've got hold of DrRacket and Tiny scheme, I have DrRacket set on R5RS setting. As an exercise I decided to try implement 'while' and 'for' that would ... chris.hinsley (299)