[PATCH] [POWERPC] Emulate isel (Integer Select) instruction

Paul Mackerras paulus at samba.org
Thu Nov 22 08:36:05 EST 2007


Geert Uytterhoeven writes:

> +#define WARN_EMULATE(type)						\
> +	do {								\
> +	    static unsigned int count;					\
> +	    if (count++ < 10)						\
> +		    pr_warning("%s used emulated %s instruction\n",	\
> +			       current->comm, type);			\

Thinking about this a bit more, if an instruction gets emulated 10
times then I don't care, since it's probably only cost me 10
microseconds or so.  If it gets emulated a million times then I might
want to look at it.  So in fact this approach doesn't give me the
information I need to know whether there is a real problem or not.

Paul.




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