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 <http://www.gnu.org/licenses/>.

// aas

void EmulatorPimpl::aas3f()

{

    uint16_t flags = registers->get_flags();

    auto al = registers->get(AL);

    auto ah = registers->get(AH);

    if ((al & 0x0f) > 9 || (flags & AF)) {

        al -= 6;

        al &= 0xf;

        --ah;

        flags |= AF | CF;

    } else {

        flags &= ~(AF | CF);

    }

    registers->set(AL, al);

    registers->set(AH, ah);

    registers->set_flags(flags, AF | CF);

}