[SOLVED] using "sra" in vhdl

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yamine

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hi,
i want to use "sra" for shifting right arithmetic, but i have this error:
"" Error (10476): VHDL error at cordic.vhd(76): type of identifier "y" does not agree with its usage as "bit_vector" type ""
 
Last edited:

Code: 
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
USE ieee.numeric_std.ALL;

entity coco is
    Port ( A: in  signed(15 downto 0);
           Z : out signed(15 downto 0) );
end coco;

architecture Behavioral of coco is
begin

Z<= A + (A sra 3);

end Behavioral;
 
Last edited:

Review ieee.numeric_std. sra isn't defined for signed data type.

Code: 
Z<= A + shift_right(A,3);
 
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    yamine

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Thank you FvM,
that resolve my problem,
where can i fine the description of function defined in ieee.numeric_std ?
 

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