Re: [cc65] c64 question

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From: Mike McCarty (jmccarty_at_ssd.usa.alcatel.com)
Date: 2001-03-19 20:25:43 

On Mon, 19 Mar 2001, MagerValp wrote:

> >>>>> "MM" == Mike McCarty <jmccarty_at_ssd.usa.alcatel.com> writes:
> 
> MM> Which could be solved by disabling interrupts.
> 
> But that's another 4 cycles for each and every stack operation. C is
> quite stack intensive.

Depends on how it is implemented. I know that this particular compiler
is stack use intensive. Yes, if a routine had 4 arguments, then four
calls to the routine would be used, resulting in 16 cycles (by your
count, I haven't verified this) of CPU used in manipulating the stack.
OTOH, I've never seen code produced by a compiler like this one waste
as little as 16 cycles inside with extra junk code.

Also, one could use a pragma to turn on/off the extra code.

Mike

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