Download Mentor Graphics VHDL Reference Manual

Design Units and Packages
________________________________________________________________________________________________________________________
FUNCTION
--- "<="
-----
"<=" (l,
FUNCTION
--- ">="
-----
">=" (l,
r\l
0
1
X
Z
r\l
0
1
X
Z
0
T
T
T
T
r : qsim_state)
0
T
F
F
F
1
F
T
F
F
X
F
T
F
F
Z
F
T
F
F
r : qsim_state)
1
T
T
T
T
X
T
F
F
F
"<"
">"
"="
"/="
">="
"<="
(l,
(l,
(l,
(l,
(l,
(l,
r
r
r
r
r
r
:
:
:
:
:
:
RETURN boolean;
Z
T
F
F
F
FUNCTION same( l, r : qsim_state )
-- True equivalence
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
FUNCTION
RETURN boolean;
RETURN boolean;
qsim_state_vector)
qsim_state_vector)
qsim_state_vector)
qsim_state_vector)
qsim_state_vector)
qsim_state_vector)
RETURN
RETURN
RETURN
RETURN
RETURN
RETURN
boolean;
boolean;
boolean;
boolean;
boolean;
boolean;
--Only the relational operators for qsim_strength are defined.
--All other operations on qsim_strength are undefined.
FUNCTION "=" (l, r : qsim_strength) RETURN boolean;
--- "=" r\l Z R S I
-Z
T F F F
-R
F T F F
-S
F F T F
-I
F F F F
FUNCTION "/="( l, r : qsim_strength)
--- "/=" r\l Z R S I
-Z
F T T F
-R
T F T F
-S
T T F F
-I
F F F F
9-48
RETURN
boolean;
Mentor Graphics VHDL Reference Manual, July 1994