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Diffstat (limited to 'Q1.core/Arch/InstructionSet.cs')
| -rw-r--r-- | Q1.core/Arch/InstructionSet.cs | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/Q1.core/Arch/InstructionSet.cs b/Q1.core/Arch/InstructionSet.cs new file mode 100644 index 0000000..68a9b55 --- /dev/null +++ b/Q1.core/Arch/InstructionSet.cs @@ -0,0 +1,203 @@ +namespace Q1.core.Arch; + +public static class InstructionSet +{ + public static readonly InstructionGroup[] Lookup = new InstructionGroup[128]; + + static InstructionSet() + { + var nop = new ImplicitInstruction { Name = "NOP", Execute = InstructionSet.Nop }; + var nopSimple = new SimpleInstruction { Name = "NOP", Execute = InstructionSet.Nop }; + var nopExtended = new ExtendedInstruction { Name = "NOP", Execute = InstructionSet.Nop }; + + #region Control Group + + InstructionSet.Lookup[0x00] = new InstructionGroup + { + Implicit = nop, + SimpleAddressing = new SimpleInstruction { Name = "JMP", Execute = InstructionSet.Jump }, + ExtendedImplicit = new ImplicitInstruction { Name = "HALT", Execute = InstructionSet.Halt }, + ExtendedAddressing = new ExtendedInstruction { Name = "MOV", Execute = InstructionSet.Move } + }; + + InstructionSet.Lookup[0x01] = new InstructionGroup + { + Implicit = new ImplicitInstruction { Name = "RET", Execute = InstructionSet.Return }, + SimpleAddressing = new SimpleInstruction { Name = "CALL", Execute = InstructionSet.Call }, + ExtendedImplicit = new ImplicitInstruction { Name = "SUS", Execute = InstructionSet.Suspend }, + ExtendedAddressing = nopExtended + }; + + InstructionSet.Lookup[0x02] = new InstructionGroup + { + Implicit = new ImplicitInstruction { Name = "BZ(LX)", Execute = InstructionSet.BranchIfZeroLx }, + SimpleAddressing = new SimpleInstruction { Name = "BZ", Execute = InstructionSet.BranchIfZero }, + ExtendedImplicit = new ImplicitInstruction { Name = "BR", Execute = InstructionSet.Branch }, + ExtendedAddressing = nopExtended + }; + + InstructionSet.Lookup[0x03] = new InstructionGroup + { + Implicit = nop, + SimpleAddressing = new SimpleInstruction { Name = "PUSH", Execute = InstructionSet.Push }, + ExtendedImplicit = nop, + ExtendedAddressing = nopExtended + }; + + InstructionSet.Lookup[0x04] = new InstructionGroup + { + Implicit = nop, + SimpleAddressing = new SimpleInstruction { Name = "POP", Execute = InstructionSet.Pop }, + ExtendedImplicit = nop, + ExtendedAddressing = nopExtended + }; + + #endregion + + #region Data Group + + InstructionSet.Lookup[0x10] = new InstructionGroup + { + Implicit = new ImplicitInstruction { Name = "INV(DX)", Execute = InstructionSet.InverseDx }, + SimpleAddressing = new SimpleInstruction { Name = "INV", Execute = InstructionSet.Inverse }, + ExtendedImplicit = nop, + ExtendedAddressing = new ExtendedInstruction { Name = "AND", Execute = InstructionSet.And } + }; + + InstructionSet.Lookup[0x11] = new InstructionGroup + { + Implicit = nop, + SimpleAddressing = nopSimple, + ExtendedImplicit = nop, + ExtendedAddressing = new ExtendedInstruction { Name = "OR", Execute = InstructionSet.Or } + }; + + InstructionSet.Lookup[0x12] = new InstructionGroup + { + Implicit = nop, + SimpleAddressing = nopSimple, + ExtendedImplicit = nop, + ExtendedAddressing = new ExtendedInstruction { Name = "XOR", Execute = InstructionSet.Xor } + }; + + InstructionSet.Lookup[0x13] = new InstructionGroup + { + Implicit = new ImplicitInstruction { Name = "SHPL(DX)", Execute = InstructionSet.ShiftPlaceLeftDx }, + SimpleAddressing = new SimpleInstruction { Name = "SHPL", Execute = InstructionSet.ShiftPlaceLeft }, + ExtendedImplicit = nop, + ExtendedAddressing = new ExtendedInstruction { Name = "SHL", Execute = InstructionSet.ShiftLeft } + }; + + InstructionSet.Lookup[0x14] = new InstructionGroup + { + Implicit = new ImplicitInstruction { Name = "SHPR(DX)", Execute = InstructionSet.ShiftPlaceRightDx }, + SimpleAddressing = new SimpleInstruction { Name = "SHPR", Execute = InstructionSet.ShiftPlaceRight }, + ExtendedImplicit = nop, + ExtendedAddressing = new ExtendedInstruction { Name = "SHL", Execute = InstructionSet.ShiftRight } + }; + + #endregion + } + + private static void Nop(Chip chip, bool word) { /* No operation */ } + private static void Nop(Chip chip, u8 m1, bool word) { /* No operation */ } + private static void Nop(Chip chip, u8 m1, u8 m2, bool word) { /* No operation */ } + + #region Control Instructions + + private static void Halt(Chip chip, bool word) + { + throw new NotImplementedException("HALT instruction is not implemented yet."); + } + + private static void Suspend(Chip chip, bool word) + { + throw new NotImplementedException("SUS instruction is not implemented yet."); + } + + private static void Move(Chip chip, u8 m1, u8 m2, bool word) + { + u16 value = chip.Load(m1, word); + chip.Store(m2, value, word); + } + + private static void Jump(Chip chip, u8 m1, bool word) + { + u16 address = chip.Load(m1, word); + chip.Pc = address; + } + + private static void Call(Chip chip, u8 m1, bool word) + { + u16 targetAddress = chip.Load(m1, word); + chip.Push(chip.Pc); + chip.Pc = targetAddress; + } + + private static void Return(Chip chip, bool word) + { + u16 returnAddress = chip.Pop(); + chip.Pc = returnAddress; + } + + private static void BranchIfZero(Chip chip, u8 m1, bool word) + { + u16 value = chip.Load(m1, word); + if (value == 0) + chip.SkipInstruction(); + } + + private static void BranchIfZeroLx(Chip chip, bool word) + { + if (chip.Lx == 0) + chip.SkipInstruction(); + } + + private static void Branch(Chip chip, bool word) + { + chip.SkipInstruction(); + } + + private static void Push(Chip chip, u8 m1, bool word) + { + u16 value = chip.Load(m1, word); + chip.Push(value); + } + + private static void Pop(Chip chip, u8 m1, bool word) + { + u16 value = chip.Pop(); + chip.Store(m1, value, word); + } + + #endregion + + #region Data Instructions + + private static void Inverse(Chip chip, u8 m1, bool word) + { + u16 value = chip.Load(m1, word); + value = (u16)~value; + + chip.Dx = value; + } + + private static void InverseDx(Chip chip, bool word) + { + chip.Dx = (u16)~chip.Dx; + } + + #endregion + + #region Logic Instructions + + + + #endregion + + #region Arithmetic Instructions + + + + #endregion +}
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