User guide

2-17
Modeling Your Design
Avoid Unaccelerated Primitives
VCS cannot accelerate tranif1, tranif0, rtranif1, rtranif0, tran, and rtran
switches. They are defined in IEEE Std 1364-2001 page 86.
Avoid Calls to User-defined Tasks or Functions Declared in
Another Module
VCS cannot accelerate user-defined tasks or functions declared in
another module. For example:
module bottom (x,y);
.
.
.
always @ y
top.task_indentifier(y,rb);
endmodule
Avoid Strength Specifications in Continuous Assignment
Statements
Omit strength specifications in continuous assignment statements.
For example:
assign net1 = flag1;
Simulates faster than:
assign (strong1, pull0) net1= flag1;
Continuous assignment statements are described on IEEE
1364-2001 pages 69-70.