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Forum: FPGA, VHDL & Verilog calculate power of float number


calculate power of float number
von Yusuf (Guest)

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I try to calculate y=2.5^x. y([0,2048)) is output which is 11 bits 
positive int and x([0,8)) is 6 bit which will fixed-point with 3 digits 
decimal and 3 digits fractional.


I write this module;

module prime(
    input [5:0] x,
    output [10:0] y
    );
    assign y = ((5'b11001)/(4'b1010))**( x / (10'b1111101000));
endmodule

RTL scheme : https://hizliresim.com/1ploYN

But it did not work. Also, I upload RTL scheme, x is not attached.
What is the reason for this? Could not verilog make a calculation with 
float numbers with this method?

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Re: calculate power of float number
von Svenska (Guest)

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Simply use a look-up table. Your 6 input bits result in 64 combinations, 
which you can easily write down.

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Re: calculate power of float number
von Lothar M. (Company: Titel) (lkmiller) (Moderator)

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Yusuf wrote:
> Could not verilog make a calculation with float numbers with this
> method?
What says the manual of your specific toolchain?

And what result do you get in the simulation?

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Re: calculate power of float number
von Alexander (Guest)

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Lothar M. wrote:
> What says the manual of your specific toolchain?

https://www.youtube.com/watch?v=0MUsVcYhERY

???

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