19 Aug
2014
19 Aug
'14
9:09 a.m.
On Mon, 18 Aug 2014 18:36:35 +0000
Fons Adriaensen <fons(a)linuxaudio.org> wrote:
On Mon, Aug 18, 2014 at 06:11:33PM +0100, Will Godfrey
wrote:
Thanks for the responses guys. I think it's a case of let the compiler do the
work. Oh, and yes, I found ARM assembly a dream to work with, although I don't
know what it's like these days. There have been quite a lot of extensions I
believe.
--
Will J Godfrey
http://www.musically.me.uk
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.
A long time ago ... in a land far away :)
I did some assembler programming on the Acorn Archimedes (ARM 2/3) and worked
out a series of additions and subtractions that would perform very fast
multiplication of awkward numbers by known amounts.
Is there any point in doing this for C programs, or are modern compilers
sophisticated enough to do such things themselves?
If anyone is interested *7 is:
RSB R1, R0, R0, LSL #3
:-) Memories... I love ARM assembly...
Modern compilers will do such things. If they exploit other
features of the ARM (such as all instructions being conditional)
I don't know, but it's very well possible.
Ciao,