User guide

D-9

Compiler Directives and System Tasks

Compiler Directive for Setting the Time Scale

`timescale

Sets the timescale. See IEEE Std 1364-2001 page 357. Syntax:

‘timescale time_unit / time_precision

In VCS the default time unit is 1 s (a full second) and the default

time precision is also 1 s.

Compiler Directive for Specifying a Library

`uselib

Searches specified library for unresolved modules. You can

specify either a library file or a library directory. Syntax:

‘uselib file = filename

‘uselib dir = directory_name libext+.ext |

libext=.ext

Enter path names if the library file or directory is not in the current

directory. For example:

‘uselib file = /sys/project/speclib.lib

If specifying a library directory, include the libext+.ext

keyword and append to it the extensions of the source files in the

library directory, just like the +libext+.ext compile-time option,

for example:

‘uselib dir = /net/designlibs/project.lib libext+.v