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/>.

// and r, r/m, 8-bit

void EmulatorPimpl::and20()

{

    modrm_decoder->set_width(OP_WIDTH_8);

    modrm_decoder->decode();

    uint8_t v1 = read_data<uint8_t>();

    uint8_t v2 = registers->get(modrm_decoder->reg());

    uint8_t result;

    uint16_t flags;

    std::tie(flags, result) = do_and<uint8_t>(v1, v2);

    flags &= ~(CF | OF);

    registers->set_flags(flags, OF | SF | ZF | CF | PF);

    write_data<uint8_t>(result & 0xff);

}

// and r, r/m, 16-bit

void EmulatorPimpl::and21()

{

    modrm_decoder->set_width(OP_WIDTH_16);

    modrm_decoder->decode();

    uint16_t v1 = read_data<uint16_t>();

    uint16_t v2 = registers->get(modrm_decoder->reg());

    uint16_t result, flags;

    std::tie(flags, result) = do_and<uint16_t>(v1, v2);

    flags &= ~(CF | OF);

    registers->set_flags(flags, OF | SF | ZF | CF | PF);

    write_data<uint16_t>(result & 0xffff);

}

// and r/m, r, 8-bit

void EmulatorPimpl::and22()

{

    modrm_decoder->set_width(OP_WIDTH_8);

    modrm_decoder->decode();

    uint8_t v1 = read_data<uint8_t>();

    uint8_t v2 = registers->get(modrm_decoder->reg());

    uint8_t result;

    uint16_t flags;

    std::tie(flags, result) = do_and<uint8_t>(v1, v2);

    flags &= ~(CF | OF);

    registers->set_flags(flags, OF | SF | ZF | CF | PF);

    registers->set(modrm_decoder->reg(), result & 0xff);

}

// and r/m, r, 16-bit

void EmulatorPimpl::and23()

{

    modrm_decoder->set_width(OP_WIDTH_16);

    modrm_decoder->decode();

    uint16_t v1 = read_data<uint16_t>();

    uint16_t v2 = registers->get(modrm_decoder->reg());

    uint16_t result;

    uint16_t flags;

    std::tie(flags, result) = do_and<uint16_t>(v1, v2);

    flags &= ~(CF | OF);

    registers->set_flags(flags, OF | SF | ZF | CF | PF);

    registers->set(modrm_decoder->reg(), result & 0xffff);

}

void EmulatorPimpl::and24()

{

    auto v1 = registers->get(AL);

    auto v2 = fetch_byte();

    uint8_t result;

    uint16_t flags;

    std::tie(flags, result) = do_and<uint8_t>(v1, v2);

    flags &= ~(CF | OF);

    registers->set_flags(flags, OF | SF | ZF | CF | PF);

    registers->set(AL, result);

}

void EmulatorPimpl::and25()

{

    auto v1 = registers->get(AX);

    auto v2 = fetch_16bit();

    uint16_t result;

    uint16_t flags;

    std::tie(flags, result) = do_and<uint16_t>(v1, v2);

    flags &= ~(CF | OF);

    registers->set_flags(flags, OF | SF | ZF | CF | PF);

    registers->set(AX, result);

}