Article ID: 000084516 Content Type: Product Information & Documentation Last Reviewed: 12/01/2009

How do I enable 64-bit processing in the Quartus II software on Linux workstations?

Environment

Linux*

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Description

Beginning with Quartus® II software version 8.1, 64-bit processing can be enabled by passing the --64bit flag to Quartus II when opening the GUI or when calling command-line executables, for example:

  • When opening the Quartus II GUI:

The  --64bit flag must be added to the command line as follows:
quartus --64bit <myProject.qpf>

If Quartus II is invoked using the --64bit flag, all sub-programs started via the GUI or Tcl console will also be passed the --64bit flag. 

  • When running command-line executables (such as quartus_map, quartus_fit, quartus_sta, quartus_tan, and/or quartus_cdb):

The  --64bit flag must be added to the command line as follows:
quartus_map --64bit

You can also run Tcl commands through the interactive Tcl shell user interface using the -s  and --64bit command line flags to enable 64-bit processing,  subsequent commands within the Tcl shell console will also use 64-bit processing.  For example:

quartus_sh --64bit -s

The information contained in this solution is missing from the Quartus II handbook version 8.1, and the help file in the Quartus II software version 8.1.  This issue is scheduled to be resolved in the next release of the Quartus II software and associated documentation.

For Quartus II software versions 8.0 and earlier, you can enable 64-bit processing in Quartus II software using one of the following methods:

  • In Quartus II software GUI, select Options from the Tools menu.  In the General category, choose Processing and select the appropriate option. The selections are disabled if you do not run the Quartus II software in a supported 64-bit environment.  This option is not available in Quartus II software beginning in version 8.1
  • You can pass the --64bit option to command-line executables as described above
  • You can use the QUARTUS_64BIT to enable the 64-bit processing in the Quartus II software.  Set the environment variable to 1 before running the Quartus II software

 

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