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genome692002

What Is Sourceboost Mulriplication Behavior?

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What is source boost Multiplication behavior anybody??

 

unsigned char seg1 = 10;

unsigned short seg2 = 4000;

unsigned short seg3 = 2000;

unsigned short segresult = seg1 * seg2 / seg3;

 

does seg1 * seg2 result is always 16bit and then this is divided by seg3 which is 16bit..

is seg1 which is 8bit gets converted first to 16bit before multiplying.. if so wouldnt it be better if i just make seg1 also 16bit to avoid convertion..

 

see I'm trying to find out which one will make the code smaller and better..

anybody know...

thanks.....

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I don't know the answer but you could easily find out by making a tiny project with just the equations that you are interested in and examining the code that is generated. As you never really know for sure what will happen until you experiment.

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