Re: How to use floating-point number in verilog code?

Altera_Forum · ‎07-11-2012

Hi,

I would like to ask anyone here can please teach me how to use floating-point number in verilog code? For example, I got a formula,

y=100*p^(1000/5255);

if I enter p=100000, I want my y value=894

Is it possible to do that in verilog?

Thanks.

Best regard,

TWK

Altera_Forum · ‎07-16-2012

Verilog has very specific rules about how data types (bit widths, signedness, and realness) are propagated through an expression.

Verilog uses integer arithmetic by default when all operands are integers. You can covert to real arithmetic by using real constants writing:

y - 100.0*p^(1000.0/5200.0);

Altera_Forum · ‎07-17-2012

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Is it possible to do that in verilog?

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It's possible to calculate real expressions at compile time, e.g. for constants, but the code isn't synthesizable.

Altera_Forum · ‎07-30-2012

If you are using constants you could represent them using binary form.