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Floating point calculations

Hello

I am trying to execute a floating point calculation with the 8051. Something like:

Result = Val1 * 0.75 + Val2 * 0.25

The C51 compiler can take that no problem, but it takes a long time to execute, would anyone know a smarter and faster way to execute this kind of code.

Thanks a lot.
Laurent

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0 erik malund over 18 years ago

would anyone know a smarter and faster way to execute this kind of code.

sure, use fixed point and calculate like this
value *= 3;
value /= 4;

The C51 compiler can take that no problem, but it takes a long time to execute

of course it does the '51 is a microcontroller not a microprocessor

If you need floating point calculations done with any speed, choose a suitable processor.

Erik
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0 erik malund over 18 years ago

would anyone know a smarter and faster way to execute this kind of code.

sure, use fixed point and calculate like this
value *= 3;
value /= 4;

The C51 compiler can take that no problem, but it takes a long time to execute

of course it does the '51 is a microcontroller not a microprocessor

If you need floating point calculations done with any speed, choose a suitable processor.

Erik
Cancel
Vote up 0 Vote down

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