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library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
entity test is end entity;
architecture a_test of test is
signal a, b : std_logic;
signal i1 : integer := 1;
constant i2 : integer := 1;
signal t1 : time := 1 ns;
constant t2 : time := 1 ns;
begin
process
variable m : boolean;
variable ip1 : integer := 1;
constant ip2 : integer := 1;
variable tp1 : time := 1 ns;
constant tp2 : time := 1 ns;
begin
m := a'stable(1 ns); --works ... literal
m := a'stable(i1 * ns); --works ... signal * unit
m := a'stable(i2 * ns); --works ... constant * unit
m := a'stable(t1); --works ... signal (time)
m := a'stable(t2); --works ... constant (time)
m := a'stable(ip1 * ns); --crashs ... LOCAL variable * unit
m := a'stable(ip2 * ns); --works ... LOCAL constant * unit
m := a'stable(tp1); --crashs ... LOCAL variable (time)
m := a'stable(tp2); --crashs ... LOCAL constant (time)
--
m := a'quiet(1 ns); --works
m := a'quiet(i1 * ns); --works
m := a'quiet(i2 * ns); --works
m := a'quiet(t1); --works
m := a'quiet(t2); --works
m := a'quiet(ip1 * ns); --crashs
m := a'quiet(ip2 * ns); --works
m := a'quiet(tp1); --crashs
m := a'quiet(tp2); --crashs
--
b <= a'delayed(1 ns); --works
b <= a'delayed(i1 * ns); --works
b <= a'delayed(i2 * ns); --works
b <= a'delayed(t1); --works
b <= a'delayed(t2); --works
b <= a'delayed(ip1 * ns); --crashs
b <= a'delayed(ip2 * ns); --works
b <= a'delayed(tp1); --crashs
b <= a'delayed(tp2); --crashs
end process;
end architecture;
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