OpenEuphoria

Re: Rob: Feature request for next release

• Posted by Cuvier Christian <christian.cuvier at insee.fr> Oct 17, 2005
• 1576 views

Subject: Re: Rob: Feature request for next release




Vincent wrote:
> 
> Rob, can we have some basic bit shifting routines for the next release:
shift_left()
> and shift_right()? It doesnt matter to me if they are implemented
internally,
> machine_proc/func(), or routines in "misc.e"... anything would do; they
are
> neccessary.
> 
> 
> Regards,
> Vincent

> 
> ----------------------------------------------
> 
>  	                 .``.
> 		         ',,'
> 
> 

Vincent:
  shifting is already available in Euphoria by
  multiplying and dividing  by 2.
  check the library doc.
  see power function
Bernie

My files in archive:
w32engin.ew mixedlib.e eu_engin.e win32eru.exw

Can be downloaded here:
http://www.rapideuphoria.com/cgi-bin/asearch.exu?dos=on&win=on&lnx=on&gen=on
&keywords=bernie+ryan


------------------------------
I'd rather push for rotate() functions that would work on any 32-bit
integers.

Btw, what could be even more useful is to be able to perform elementary
arithmetic on memory locations. For instance, you currently have to type

poke4(a,peek4u(a)+some_value)

Which isn't too good as peek/poke has its overhead. Using call() to do this
is even worse. Rather, an internally built

perform_op(a,PLUS,some_value)

would probably help. Both add some_value at the dword pointed by a.

The needed constants would be:
PLUS
MINUS
MINUS_R  -- for reverse substraction
MUL
DIV --store quotient
DIV_R
AND
OR
XOR

Perhaps adding ROR, ROL,SHL and SHR would be good too.

CChris