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library ieee;
use ieee.std_logic_1164.all;
package foo_pkg is
type unresolved_sfixed is array (integer range <>) of std_ulogic;
subtype sfixed is (resolved) UNRESOLVED_sfixed;
function to_string (inp: unresolved_sfixed) return string;
end package foo_pkg;
package body foo_pkg is
function to_string (inp: unresolved_sfixed) return string is
variable image_str: string (1 to inp'length + 1);
variable j: integer range 1 to image_str'length + 1;
begin
j := 1;
for i in inp'range loop
if i = -1 then
image_str(j) := ',';
j := j + 1;
end if;
image_str(j) := character'VALUE(std_ulogic'IMAGE(inp(i)));
j := j + 1;
end loop;
return image_str;
end function;
end package body foo_pkg;
library ieee;
use ieee.std_logic_1164.all;
use work.foo_pkg.all;
entity foo is
end entity;
architecture fum of foo is
constant sfixed_val: sfixed (3 downto -4):= x"da";
function to_string (inp: sfixed) return string is
variable image_str: string (1 to inp'length + 1);
variable j: integer range 1 to image_str'length + 1;
begin
j := 1;
for i in inp'range loop
if i = -1 then
image_str(j) := '.';
j := j + 1;
end if;
image_str(j) := character'VALUE(std_ulogic'IMAGE(inp(i)));
j := j + 1;
end loop;
return image_str;
end function;
begin
process
begin
report "sfixed_val = " & to_string(sfixed_val);
wait;
end process;
end architecture;
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