Do not support the constant shift

[kmurray]

Originally reported on Google Code with ID 45

What steps will reproduce the problem?
1. gdb ./odin_II.exe
2.r -V a25/a25_decode.v
3.

What is the expected output? What do you see instead?
When using the right shift operator, it should work. but it doesn't support it with
localparam or arrays.

error:(Line number: 1430) Odin only supports constant shifts at present

Line: 1239(a25_decode.v  (1'd1 << instruction[19:16]))

What version of the product are you using? On what operating system?


Please provide any additional information below.

Reported by JanetChina.V on 2012-10-25 19:03:39

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- _Attachment: [a25_decode.v](https://storage.googleapis.com/google-code-attachments/vtr-verilog-to-routing/issue-45/comment-0/a25_decode.v)_ - _Attachment: [a25_decompile.v](https://storage.googleapis.com/google-code-attachments/vtr-verilog-to-routing/issue-45/comment-0/a25_decompile.v)_ - _Attachment: [debug_functions.v](https://storage.googleapis.com/google-code-attachments/vtr-verilog-to-routing/issue-45/comment-0/debug_functions.v)_

[fresh-eggs]

Implementation of such a feature is currently being investigated by Zack and Panos.

[mflawn]

Still outstanding issue, see attached the file to reproduce:

a25_decode_fix.v.txt

Converting AST into a Netlist. Note this netlist can be viewed using GraphViz (see documentation) 
==========================
Detected Top Level Module:      a25_decode
==========================
-------------- 
Odin has decided you have failed ;)

ERROR (1):NETLIST_ERROR (File: a25/a25_decode_fix.v) (Line number: 1239) Odin only supports constant shifts at present

                                                        (instruction[15:0] & (1'd1 << instruction[19:16]));
ASSERT FAILED:
        @[/mnt/c/Users/casa/vtr-verilog-to-routing/ODIN_II/SRC/netlist_create_from_ast.cpp]create_operation_node::4213  
Aborted (core dumped)

[jeanlego]

closing since #1560 add variable shift support