Re: C code .vs. Assembly code for Microcontrollers/DSPs ?

cdg@nullstone.com (Christopher Glaeser) writes:


>> [Do people really not use const and static? -John]
>
>2) static - Static can cause significant performance problems for many
>C compilers. In particular, few C compilers can keep static variables
>in registers over a region of code.


I think the original poster who suggested using `static' for optimization
purposes was suggesting it as an alternative to making variables
and functions global, not as an alternative to using auto variables.
When used for this purpose, I suspect it may have some effect. For
example, compilers may be more inclined to inline a static function.


--
Fergus Henderson WWW: http://www.cs.mu.oz.au/~fjh
fjh@cs.mu.oz.au PGP: finger fjh@128.250.37.3


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