Subversion Repositories s80186

// Copyright Jamie Iles, 2017

//

// This file is part of s80x86.

//

// s80x86 is free software: you can redistribute it and/or 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 your option) any later version.

//

// s80x86 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 s80x86.  If not, see .

task common_flags;

    inout [15:0] flags;

    input is_8_bit;

    // verilator lint_off UNUSED

    input [15:0] out;

    input [15:0] a;

    input [15:0] b;

    // verilator lint_on UNUSED

    begin

        flags[PF_IDX] = ~^out[7:0];

        flags[AF_IDX] = a[4] ^ b[4] ^ out[4];

        flags[SF_IDX] = out[is_8_bit ? 7 : 15];

        flags[ZF_IDX] = is_8_bit ? ~|out[7:0] : ~|out;

    end

endtask