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[/] [zipcpu/] [trunk/] [rtl/] [core/] [idecode.v] - Diff between revs 140 and 160

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Rev 140 Rev 160
Line 17... Line 17...
// Creator:     Dan Gisselquist, Ph.D.
// Creator:     Dan Gisselquist, Ph.D.
//              Gisselquist Technology, LLC
//              Gisselquist Technology, LLC
//
//
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
//
//
// Copyright (C) 2015, Gisselquist Technology, LLC
// Copyright (C) 2015-2016, Gisselquist Technology, LLC
//
//
// This program is free software (firmware): you can redistribute it and/or
// This program is free software (firmware): you can redistribute it and/or
// modify it under the terms of  the GNU General Public License as published
// modify it under the terms of  the GNU General Public License as published
// by the Free Software Foundation, either version 3 of the License, or (at
// by the Free Software Foundation, either version 3 of the License, or (at
// your option) any later version.
// your option) any later version.
Line 86... Line 86...
        wire    dcdA_stall, dcdB_stall, dcdF_stall;
        wire    dcdA_stall, dcdB_stall, dcdF_stall;
        wire                    o_dcd_early_branch;
        wire                    o_dcd_early_branch;
        wire    [(AW-1):0]       o_dcd_branch_pc;
        wire    [(AW-1):0]       o_dcd_branch_pc;
        reg     o_dcdI, o_dcdIz;
        reg     o_dcdI, o_dcdIz;
`ifdef  OPT_PIPELINED
`ifdef  OPT_PIPELINED
        reg     r_lock, r_pipe;
        reg     r_lock;
 
`endif
 
`ifdef  OPT_PIPELINED_BUS_ACCESS
 
        reg     r_pipe;
`endif
`endif
 
 
 
 
        wire    [4:0]    w_op;
        wire    [4:0]    w_op;
        wire            w_ldi, w_mov, w_cmptst, w_ldilo, w_ALU, w_brev, w_noop;
        wire            w_ldi, w_mov, w_cmptst, w_ldilo, w_ALU, w_brev, w_noop;
Line 441... Line 444...
        //              by one
        //              by one
        // Note that we're not using iword here ... there's a lot of logic
        // Note that we're not using iword here ... there's a lot of logic
        // taking place, and it's only valid if the new word is not compressed.
        // taking place, and it's only valid if the new word is not compressed.
        //
        //
        reg     r_valid;
        reg     r_valid;
`ifdef  OPT_PIPELINED
`ifdef  OPT_PIPELINED_BUS_ACCESS
        initial r_pipe = 1'b0;
        initial r_pipe = 1'b0;
        always @(posedge i_clk)
        always @(posedge i_clk)
                if (i_ce)
                if (i_ce)
                        r_pipe <= (r_valid)&&(i_pf_valid)&&(~i_instruction[31])
                        r_pipe <= (r_valid)&&(i_pf_valid)&&(~i_instruction[31])
                                &&(w_dcdM)&&(o_M)&&(o_op[0] ==i_instruction[22])
                                &&(w_dcdM)&&(o_M)&&(o_op[0] ==i_instruction[22])

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