11 Jan
2006
11 Jan
'06
10:01 a.m.
On Wed, Jan 11, 2006 at 01:53:25PM +0000, Steve Harris wrote:
I agree about ARM assembly, I have written some (not
DSP related) many
years ago and it was quite straightforward.
Another ex Acorn user ???
Does this ARM chip have real fixedpoint hardware, or
do you have to do bit
manipulations to get the numbers?
It doesn't have anything specific fixed point. It's all integer, and you,
as the programmer, have to imagine a binary point somewhere in your data
and keep track of it.
What helps enormously on the ARM is that all arithmetic instructions can
include a (no overhead) shift on one of the operands. There are some
other unique things, such as the 16 conditions on *all* instructions.
--
FA