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[/] [klc32/] [trunk/] [rtl/] [verilog/] [REGFETCHB.v] - Rev 13
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// ============================================================================ // (C) 2011 Robert Finch // All Rights Reserved. // robfinch<remove>@opencores.org // // KLC32 - 32 bit CPU // REGFETCHB.v - fetch the B side register // // This source file is free software: you can redistribute it and/or modify // it under the terms of the GNU Lesser General Public License as published // by the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // This source file is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program. If not, see <http://www.gnu.org/licenses/>. // // ============================================================================ // REGFETCHB: begin b <= rfo; Rn <= ir[15:11]; if (opcode==`RRR || (opcode==`RR && (func==`SWX||func==`SHX||func==`SBX))) state <= REGFETCHC; else begin // RIX format ? if (hasConst16 && ir[15:0]==16'h8000) state <= FETCH_IMM32; else begin case(opcode) `ANDI: imm <= {16'hFFFF,ir[15:0]}; `ORI: imm <= {16'h0000,ir[15:0]}; `EORI: imm <= {16'h0000,ir[15:0]}; default: imm <= {{16{ir[15]}},ir[15:0]}; endcase state <= EXECUTE; end end end
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