Re: Can Windows CL compilers be as fast as CMUCL ?

From: Harald Hanche-Olsen (hanche_at_math.ntnu.no)
Date: 02/15/05 

Date: 15 Feb 2005 21:27:38 +0100

+ Wade Humeniuk <whumeniu+anti+spam@telus.net>:

| Well it does look slow to me. With vector based CPU instructions that
| routine could be reduced to one instruction. On the vector based
| machines I was familiar with (the old CYBER 205) there was a single
| machine instruction to multiply a vector by a scalar. I assume the
| newer x86 instructions provide something similar. Perhaps if
| the Lisp vendors provided an API to embed machine instructions
| directly and allow some low level access to get at the internal
| representation of vectors, then this would all be academic.

Or one could venture into FFI land and use BLAS routines properly
optimized for the CPU in question?

  http://www.netlib.org/blas/faq.html 

-- 
* Harald Hanche-Olsen     <URL:http://www.math.ntnu.no/~hanche/>
- Debating gives most of us much more psychological satisfaction
  than thinking does: but it deprives us of whatever chance there is
  of getting closer to the truth.  -- C.P. Snow

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