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AR# 44556

XST - Severity Change for XST message "WARNING:HDLCompiler:922" Beginning ISE 13.3 Software

Description

Beginning with the 13.3 software, the warning message "WARNING:HDLCompiler:922" produced by Verific XST will change to an error message: "ERROR:HDLCompiler:922" for those cases when a parameter is mapped more than once in the parameter mapping of a module instantiation.

The error message is as follows:

"ERROR:HDLCompiler:922 - "multiple_override_parameter_922.v" Line 6: Multiple overrides for parameter WIDTH
INFO - You can change the severity of this error message to warning using switch -change_error_to_warning "HDLCompiler:922"

Solution

Take the following piece of code as an example:

module top (a, b, out);
parameter WIDTH = 8;
input [WIDTH-1:0] a;
inout [WIDTH-1:0] b;
output [WIDTH-1:0]out;
and2 #(.WIDTH(6),.WIDTH(4)) and2_inst(.a(a),.b(b),.out(out));
endmodulemodule and2 (a , b, out);
parameter WIDTH = 8;
input [WIDTH-1:0] a;
input [WIDTH-1:0] b;
output [WIDTH-1:0] out;
assign out = a & b;
endmodule

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

"WARNING:HDLCompiler:922 -"multiple_override_parameter_922.v" Line 6: Multiple overrides for parameter WIDTH

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:922 - "multiple_override_parameter_922.v" Line 6: Multiple overrides for parameter WIDTH"

In  the above sample code, parameter WIDTH is mapped twice with different values, which causes the compiler to error out with HDLCompiler:922.  You can change the severity of the error message to a warning by using the switch: 

-change_error_to_warning "HDLCompiler:922"

AR# 44556
Date Created 10/20/2011
Last Updated 05/26/2014
Status Archive
Type General Article
Tools
  • ISE Design Suite - 13.3