Simulation Time Functions
Formal Definition
The simulation time function provides an access to current simulation time.
Simplified Syntax
$time ;
$stime ;
$realtime ;
Description
When the $time system function is called, it returns the current time
as a 64bit integer value. However, this value is scaled to the
`timescale unit. (See Timescale chapter)
The $stime system function returns current time as a 32bit unsigned
integer value. If the current simulation time is too large and the
value does not fit in 32 bits, the function only returns the 32 low
order bits of the value. The returned value is also scaled to the `timescale.
The $realtime system function returns a value as a real number. As
with the other time tasks, the returned value is scaled to the `timescale.
Examples
Example 1
integer cur_time ;
cur_time = $time ;
Example 2
integer cur_time ;
cur_time = $stime ;
Example 3
real cur_time ;
cur_time = $realtime ;
Example 4
$display($time,
"is current time.");
Important Notes
