Ahmad-
> 1- Would you know how we can perform 40-bit
operations like add or
> multiply in C54x which its longest data tyype is 32 bit?
> In MELPe 1200bps there is some functions which does 40-bit
> operation do you know how can I implement them for C54x?
Here are some docs that should help:
http://focus.ti.com/lit/an/spra297/spra297.pdf
http://focus.ti.com/lit/ug/spru173/spru173.pdf
http://focus.ti.com/lit/an/spra554b/spra554b.pdf
The first doc is a good one, even though it's about C62xx and not C54x. It
explains
how to use a series of 16-bit multiplies to achieve 32-bit and 64-bit results.
The
graphics in the explanation are excellent.
In the second doc, look for section 6.4, Extended Precision Arithmetic.
> 2- if I want to define a big array in assembly I
should write its
> type (for example .int or .word) at the first of each line. How
> can I do it if the number of lines in my array were high?
The question doesn't seem clear. Do you mean like this:
int ahmad_array[N] = {
5764, 5782, 6975, 6370, 5389,
7926, 6939, 7332, 8027, 8468,
...
...
}
The above array definition can be as big as you want. If you want the array to
be
loaded into program memory (re. one of your previous questions), then use:
const int ahmad_array[N] = {
-Jeff
Re: An Important problem about C54x data types (extended precision)
Started by ●May 18, 2008
