OpenCores
URL https://opencores.org/ocsvn/s80186/s80186/trunk

Subversion Repositories s80186

[/] [s80186/] [trunk/] [rtl/] [alu/] [flags.sv] - Blame information for rev 2

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 2 jamieiles
// Copyright Jamie Iles, 2017
2
//
3
// This file is part of s80x86.
4
//
5
// s80x86 is free software: you can redistribute it and/or modify
6
// it under the terms of the GNU General Public License as published by
7
// the Free Software Foundation, either version 3 of the License, or
8
// (at your option) any later version.
9
//
10
// s80x86 is distributed in the hope that it will be useful,
11
// but WITHOUT ANY WARRANTY; without even the implied warranty of
12
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
// GNU General Public License for more details.
14
//
15
// You should have received a copy of the GNU General Public License
16
// along with s80x86.  If not, see .
17
 
18
task common_flags;
19
    inout [15:0] flags;
20
    input is_8_bit;
21
    // verilator lint_off UNUSED
22
    input [15:0] out;
23
    input [15:0] a;
24
    input [15:0] b;
25
    // verilator lint_on UNUSED
26
 
27
    begin
28
        flags[PF_IDX] = ~^out[7:0];
29
        flags[AF_IDX] = a[4] ^ b[4] ^ out[4];
30
        flags[SF_IDX] = out[is_8_bit ? 7 : 15];
31
        flags[ZF_IDX] = is_8_bit ? ~|out[7:0] : ~|out;
32
    end
33
endtask

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.