🚀 go-pugleaf

I have been trying to model the shift right/left operations wherein I
shift a register by a variable amount (specified within the instruction).

This is the way I tried to do it:

parameter WIDTH = 32;
`define SHAMT IR[10 : 6] 
reg [WIDTH - 1 : 0] op2,temp,result,IR;
.
.
.
.
 result = {{`SHAMT{op2[WIDTH-1]}},temp[WIDTH - `SHAMT - 1:0]};

I keep getting the following error message :

Error!    Non-constant part-select index                    [Verilog-NCPSI]
          "r2k.v", 560: temp[WIDTH - IR[10 : 6] - 1:0]

The manual says that you cannot concantenate with non-constant widths.

Any ideas on how to get around this problem ?

Thanks in advance.
Belliappa Kuttanna  kuttanna@ee.tamu.edu