#region License
/* 
 * Copyright (C) 1999-2022 John Källén.
 *
 * This program 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 2, or (at your option)
 * any later version.
 *
 * This program 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 this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#endregion

using NUnit.Framework;
using Reko.Arch.X86;
using Reko.Arch.X86.Assembler;
using Reko.Core;
using Reko.Core.Machine;
using Reko.Core.Memory;
using Reko.Environments.Msdos;
using System.Collections.Generic;
using System.Linq;

namespace Reko.UnitTests.Arch.X86.Assembler
{
    [TestFixture]
    public class IntelCodeAssemblerTests : AssemblerBase
    {
        X86Assembler m;

        [SetUp]
        public new void Setup()
        {
            base.Setup();
            m = new X86Assembler(
                new X86ArchitectureReal(sc, "x86-real-16", new Dictionary<string, object>()),
                Address.SegPtr(0x100, 0x0100),
                new List<ImageSymbol>());
        }

        private byte[] GetBytes(X86Assembler m)
        {
            var bmem = (ByteMemoryArea) m.GetImage().SegmentMap.Segments.Values.First().MemoryArea;
            return bmem.Bytes;
        }

        [Test]
        public void X86Asm_MovRegReg()
        {
            m.Mov(Reg(Registers.ax), Reg(Registers.bx));
            AssertEqualBytes("8BC3", GetBytes(m));
        }

        private ParsedOperand Reg(RegisterStorage reg)
        {
            return new ParsedOperand(reg);
        }

        [Test]
        public void X86Asm_MovRegConst()
        {
            m.Mov(Reg(Registers.ax), 0x300);
            AssertEqualBytes("B80003", GetBytes(m));
        }

        [Test]
        public void X86Asm_MovMemReg()
        {
            m.Mov(m.BytePtr(0x0300), 0x12);
            AssertEqualBytes("C606000312", GetBytes(m));
        }

        [Test]
        public void X86Asm_SegmentDirective()
        {
            m.Segment("CODE");
            m.Db(1, 2, 3, 4);
            m.Ends();

            m.Segment("DATA");
            m.Dd(4);

            var bytes = GetBytes(m);
            Assert.AreEqual(0x10 + 4, bytes.Length);        // len(CODE) + alignment padding + len(DATA)
        }

        [Test]
        public void X86Asm_issue_496()
        {
            m.Out(m.Imm(0xFF), m.al);
            m.Out(m.Imm(0xFC), m.ax);

            AssertEqualBytes("E6FFE7FC", GetBytes(m));
        }


        [Test]
        public void X86Asm_out_dx()
        {
            m.Out(m.dx, m.al);
            m.Out(m.dx, m.ax);

            AssertEqualBytes("EEEF", GetBytes(m));
        }
    }
}
