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Re: CVS commit: src/sys/arch/arm/ep93xx
On Fri, Dec 19, 2008 at 08:27:30AM -0500, Ken Hornstein wrote:
> >Would something like (untested!):
> >- remaining = n * TIMER_FREQ / 1000000;
> >+ remaining = (uint64_t)n * TIMER_FREQ / 1000000;
> >do instead, forcing 64-bit arithmetic?
> I admit to being lame and always forgetting the rules when it comes to
> forcing different precision for arithmetic in C. My thinking was that
> since there was something that I knew worked before and was faster, I
> should go with that. I don't have an objection to this (or what Itzumi
> posted), but is there a reason to not use the original code?
It hard-wires a separate constant, it is impossible to read and it might
not even be faster than the above if the compiler is smart.
Additionally, avoiding inline assembly means less GCC dependency.
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