User guide

2-23

Modeling Your Design

Using the +v2k Compile-Time Option

The following table lists the implemented constructs in Std 1364-2001

and whether you need the +v2k compile-time option to use them.

Std 1364-2001 Construct Require +v2k

comma separated event control expressions:

always @ (r1,r2,r3)

yes

name-based parameter passing:

modname #(.param_name(value)) inst_name(sig1,...);

yes

ANSI-style port and argument lists:

module dev(output reg [7:0] out1, input wire [7:0]

w1);

yes

initialize a reg in its declaration:

reg [15:0] r2 = 0;

yes

conditional compiler directives:

‘ifndef and ‘elseif

yes

disabling the default net data type:

‘default_nettype

yes

signed arithmetic extensions:

reg signed [7:0] r1;

file I/O system tasks:

$fopen $fsanf $scanf and more

passing values from the runtime command line:

$value$plusarg system function

yes

indexed part-selects:

reg1[8+:5]=5’b11111;

yes

multi-dimensional arrays:

reg [7:0] r1 [3:0] [3:0];

yes

maintaining file name and line number:

‘line

yes

implicit event control expression lists:

always @*

yes