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Division Problem

karlsmartin

Hi all,

 I have a problem with the division of a real number, for example dividing 45546 with 10000. The expected value would be 4.5546. But as a result I get 4.5545999999998. Is there a workaround for this problem?

integer v_int; 

real v_real;

initial begin

  v_int = 45546;

  v_real = v_int/10000;

end

 

Regards,

martin

Parents

  • Hello Tim,

    Thanks a lot for your answer. With the integer divided by an integer you are completly right. Unfortunately I forgot in my example the $itor systme task I'm using.

    The thing is, that I have a discrepance between the $display-output in the console and the waveform-output. Looks like the $display is rounding the result to 6 digits after the point and not prinitng the value which the simulator is handling. Even when I hard assign the value to v_real = 4.5546 I get a discrepance, due to the reason that a real "real-value" doesn't exist. My question is if I can tell the simulator only to have a accuracy of 4 digits after the point. I tried to convert the real-value to bits and to cut of some of the last bits. But this is not really working.

    Regards,
    martin

Reply

  • Hello Tim,

    Thanks a lot for your answer. With the integer divided by an integer you are completly right. Unfortunately I forgot in my example the $itor systme task I'm using.

    The thing is, that I have a discrepance between the $display-output in the console and the waveform-output. Looks like the $display is rounding the result to 6 digits after the point and not prinitng the value which the simulator is handling. Even when I hard assign the value to v_real = 4.5546 I get a discrepance, due to the reason that a real "real-value" doesn't exist. My question is if I can tell the simulator only to have a accuracy of 4 digits after the point. I tried to convert the real-value to bits and to cut of some of the last bits. But this is not really working.

    Regards,
    martin

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