Author Topic: Branch Misprediction  (Read 234 times)

Siekmanski

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Re: Branch Misprediction
« Reply #15 on: November 10, 2018, 05:13:53 AM »
I usually follow the RDTSC route, today I followed the method inherited from the other thread which has also some advantages, in my opinion.
:t

The timers are not to calculate routine execution times.
These timers are meant to run simultaneous in realtime to control multimedia events in games or demos.

for example:

- timer 1 controls the time to switch to the next scene.
- timer 2 controls when a flock of birds fly over.
- timer 3 controls the duration of a bullet salvo.
- timer 4 controls when an UFO enters the earth orbit.

etc.
Creative coders use backward thinking techniques as a strategy.

LordAdef

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Re: Branch Misprediction
« Reply #16 on: November 10, 2018, 09:37:49 AM »
Hi jose, Thanks for carrying the tourch!
Code: [Select]
Unpredictable Branching Performance Test using xorshift32 begins:

Test A (Branching):  1452.756573     esi: 100007857

Test B (No Branching/Using SETCC):  679.610210     esi: 99997780

Test C (No Branching/Using CMOV):  588.437494     esi: 100011413

Press any key to continue ...