We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 44558

XST - Severity Change for XST message " WARNING:HDLCompiler:1330" Beginning with ISE 13.3 Software


Beginning with the 13.3 software, Verific XST warning message "WARNING:HDLCompiler:1330 " will be changed to an error message:"ERROR:HDLCompiler:1330" for those cases where a defined functionin amodule does not havea return value assignment.

The error message is as follows:

"ERROR:HDLCompiler:1330 - "function_no_return_1330.v" Line 3: Function left_shift_by_one has no return value assignmentINFO - You can change the severity of this error message to warning using switch -change_error_to_warning "HDLCompiler:1330"


Take the following piece of code as an example:

module top(output out);

function [1:0] left_shift_by_one;
input in;
left_shift_by_one = in << 1;



assign out = left_shift_by_one(1'b1);


The Verific XST (prior to version 13.3) would have given the following warning message for the above piece of code:

"WARNING:HDLCompiler:1330 - "function_no_return_1330.v" Line 3: Function left_shift_by_one has no return value assignment

Beginning version 13.3 of XST, this warning is modified to an error without any change to the actual information or message as follows:

"ERROR:HDLCompiler:1330 - "function_no_return_1330.v" Line 3: Function left_shift_by_one has no return value assignment"

In the above sample code, Function left_shift_by_one does not have a return value assignment as it iscommented. As a result, when theXST new parser encounters this code, it produces the HDLCompiler:1330 error message.

You can change the severity of the error message can be changed to warning by using the switch:
-change_error_to_warning "HDLCompiler:1330"

AR# 44558
Date Created 10/20/2011
Last Updated 12/15/2012
Status Active
Type General Article
  • ISE Design Suite - 13.3