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| From: | Paolo Bonzini |
| Subject: | Re: [Qemu-devel] [RFC] find_next_bit optimizations |
| Date: | Mon, 11 Mar 2013 18:07:24 +0100 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130219 Thunderbird/17.0.3 |
Il 11/03/2013 18:06, ronnie sahlberg ha scritto:
> Even more efficient might be to do bitwise instead of logical or
>
>> > if (tmp | d1 | d2 | d3) {
> that should remove 3 of the 4 conditional jumps
> and should become 3 bitwise ors and one conditional jump
Without any serious profiling, please let the compiler do that.
Paolo
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