Re: x86: A fast way to check capabilities of the current cpu

[Miguel Ojeda]

On Wed, Dec 15, 2010 at 10:39 PM, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
> On 12/15/2010 01:30 PM, Miguel Ojeda wrote:
>>
>> In this case it this_cpu_*_test_bit() return an int, but they act as a
>> bool and are used in if()s; where is the catch?
>>
>
> If they aren't, and are stored in a variable for whatever reason, then
> the || form will generate additional instructions to booleanize the
> value for no good reason.

Thanks! I suppose that is the 't' of being "a fast way" ;-)

>
>        -hpa
>
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