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/>.
 
// aad
void EmulatorPimpl::aadd5()
{
    uint16_t flags = registers->get_flags();
 
    uint16_t v = registers->get(AL) + registers->get(AH) * fetch_byte();
 
    if (v & 0x8000)
        flags |= SF;
    if (!v)
        flags |= ZF;
    if (!__builtin_parity(v & 0xff))
        flags |= PF;
 
    registers->set(AL, v);
    registers->set(AH, 0);
    registers->set_flags(flags, SF | ZF | PF);
}