mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-12-21 11:22:00 +00:00
f468db7602
* Implement Thumb (32-bit) memory (ordered), multiply and bitfield instructions * Remove public from interface * Fix T32 BL immediate and implement signed and unsigned extend instructions
379 lines
12 KiB
C#
379 lines
12 KiB
C#
using ARMeilleure.Decoders;
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using ARMeilleure.IntermediateRepresentation;
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using ARMeilleure.State;
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using ARMeilleure.Translation;
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using System;
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using static ARMeilleure.Instructions.InstEmitAluHelper;
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using static ARMeilleure.Instructions.InstEmitHelper;
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using static ARMeilleure.IntermediateRepresentation.Operand.Factory;
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namespace ARMeilleure.Instructions
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{
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static partial class InstEmit32
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{
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[Flags]
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private enum MullFlags
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{
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Subtract = 1,
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Add = 1 << 1,
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Signed = 1 << 2,
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SignedAdd = Signed | Add,
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SignedSubtract = Signed | Subtract
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}
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public static void Mla(ArmEmitterContext context)
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{
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IOpCode32AluMla op = (IOpCode32AluMla)context.CurrOp;
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Operand n = GetAluN(context);
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Operand m = GetAluM(context);
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Operand a = GetIntA32(context, op.Ra);
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Operand res = context.Add(a, context.Multiply(n, m));
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if (ShouldSetFlags(context))
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{
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EmitNZFlagsCheck(context, res);
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}
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EmitAluStore(context, res);
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}
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public static void Mls(ArmEmitterContext context)
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{
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IOpCode32AluMla op = (IOpCode32AluMla)context.CurrOp;
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Operand n = GetAluN(context);
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Operand m = GetAluM(context);
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Operand a = GetIntA32(context, op.Ra);
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Operand res = context.Subtract(a, context.Multiply(n, m));
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EmitAluStore(context, res);
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}
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public static void Smmla(ArmEmitterContext context)
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{
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EmitSmmul(context, MullFlags.SignedAdd);
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}
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public static void Smmls(ArmEmitterContext context)
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{
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EmitSmmul(context, MullFlags.SignedSubtract);
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}
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public static void Smmul(ArmEmitterContext context)
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{
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EmitSmmul(context, MullFlags.Signed);
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}
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private static void EmitSmmul(ArmEmitterContext context, MullFlags flags)
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{
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IOpCode32AluMla op = (IOpCode32AluMla)context.CurrOp;
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Operand n = context.SignExtend32(OperandType.I64, GetIntA32(context, op.Rn));
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Operand m = context.SignExtend32(OperandType.I64, GetIntA32(context, op.Rm));
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Operand res = context.Multiply(n, m);
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if (flags.HasFlag(MullFlags.Add) && op.Ra != 0xf)
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{
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res = context.Add(context.ShiftLeft(context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.Ra)), Const(32)), res);
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}
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else if (flags.HasFlag(MullFlags.Subtract))
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{
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res = context.Subtract(context.ShiftLeft(context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.Ra)), Const(32)), res);
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}
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if (op.R)
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{
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res = context.Add(res, Const(0x80000000L));
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}
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Operand hi = context.ConvertI64ToI32(context.ShiftRightSI(res, Const(32)));
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EmitGenericAluStoreA32(context, op.Rd, false, hi);
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}
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public static void Smla__(ArmEmitterContext context)
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{
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IOpCode32AluMla op = (IOpCode32AluMla)context.CurrOp;
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Operand n = GetIntA32(context, op.Rn);
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Operand m = GetIntA32(context, op.Rm);
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Operand a = GetIntA32(context, op.Ra);
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if (op.NHigh)
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{
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n = context.SignExtend16(OperandType.I64, context.ShiftRightUI(n, Const(16)));
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}
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else
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{
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n = context.SignExtend16(OperandType.I64, n);
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}
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if (op.MHigh)
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{
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m = context.SignExtend16(OperandType.I64, context.ShiftRightUI(m, Const(16)));
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}
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else
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{
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m = context.SignExtend16(OperandType.I64, m);
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}
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Operand res = context.Multiply(n, m);
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Operand toAdd = context.SignExtend32(OperandType.I64, a);
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res = context.Add(res, toAdd);
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Operand q = context.ICompareNotEqual(res, context.SignExtend32(OperandType.I64, res));
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res = context.ConvertI64ToI32(res);
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UpdateQFlag(context, q);
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EmitGenericAluStoreA32(context, op.Rd, false, res);
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}
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public static void Smlal(ArmEmitterContext context)
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{
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EmitMlal(context, true);
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}
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public static void Smlal__(ArmEmitterContext context)
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{
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IOpCode32AluUmull op = (IOpCode32AluUmull)context.CurrOp;
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Operand n = GetIntA32(context, op.Rn);
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Operand m = GetIntA32(context, op.Rm);
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if (op.NHigh)
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{
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n = context.SignExtend16(OperandType.I64, context.ShiftRightUI(n, Const(16)));
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}
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else
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{
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n = context.SignExtend16(OperandType.I64, n);
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}
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if (op.MHigh)
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{
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m = context.SignExtend16(OperandType.I64, context.ShiftRightUI(m, Const(16)));
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}
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else
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{
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m = context.SignExtend16(OperandType.I64, m);
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}
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Operand res = context.Multiply(n, m);
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Operand toAdd = context.ShiftLeft(context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.RdHi)), Const(32));
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toAdd = context.BitwiseOr(toAdd, context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.RdLo)));
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res = context.Add(res, toAdd);
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Operand hi = context.ConvertI64ToI32(context.ShiftRightUI(res, Const(32)));
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Operand lo = context.ConvertI64ToI32(res);
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EmitGenericAluStoreA32(context, op.RdHi, false, hi);
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EmitGenericAluStoreA32(context, op.RdLo, false, lo);
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}
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public static void Smlaw_(ArmEmitterContext context)
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{
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IOpCode32AluMla op = (IOpCode32AluMla)context.CurrOp;
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Operand n = GetIntA32(context, op.Rn);
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Operand m = GetIntA32(context, op.Rm);
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Operand a = GetIntA32(context, op.Ra);
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if (op.MHigh)
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{
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m = context.SignExtend16(OperandType.I64, context.ShiftRightUI(m, Const(16)));
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}
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else
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{
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m = context.SignExtend16(OperandType.I64, m);
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}
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Operand res = context.Multiply(context.SignExtend32(OperandType.I64, n), m);
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Operand toAdd = context.ShiftLeft(context.SignExtend32(OperandType.I64, a), Const(16));
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res = context.Add(res, toAdd);
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res = context.ShiftRightSI(res, Const(16));
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Operand q = context.ICompareNotEqual(res, context.SignExtend32(OperandType.I64, res));
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res = context.ConvertI64ToI32(res);
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UpdateQFlag(context, q);
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EmitGenericAluStoreA32(context, op.Rd, false, res);
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}
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public static void Smul__(ArmEmitterContext context)
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{
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IOpCode32AluMla op = (IOpCode32AluMla)context.CurrOp;
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Operand n = GetIntA32(context, op.Rn);
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Operand m = GetIntA32(context, op.Rm);
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if (op.NHigh)
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{
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n = context.ShiftRightSI(n, Const(16));
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}
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else
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{
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n = context.SignExtend16(OperandType.I32, n);
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}
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if (op.MHigh)
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{
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m = context.ShiftRightSI(m, Const(16));
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}
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else
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{
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m = context.SignExtend16(OperandType.I32, m);
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}
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Operand res = context.Multiply(n, m);
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EmitGenericAluStoreA32(context, op.Rd, false, res);
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}
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public static void Smull(ArmEmitterContext context)
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{
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IOpCode32AluUmull op = (IOpCode32AluUmull)context.CurrOp;
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Operand n = context.SignExtend32(OperandType.I64, GetIntA32(context, op.Rn));
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Operand m = context.SignExtend32(OperandType.I64, GetIntA32(context, op.Rm));
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Operand res = context.Multiply(n, m);
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Operand hi = context.ConvertI64ToI32(context.ShiftRightUI(res, Const(32)));
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Operand lo = context.ConvertI64ToI32(res);
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if (ShouldSetFlags(context))
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{
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EmitNZFlagsCheck(context, res);
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}
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EmitGenericAluStoreA32(context, op.RdHi, ShouldSetFlags(context), hi);
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EmitGenericAluStoreA32(context, op.RdLo, ShouldSetFlags(context), lo);
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}
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public static void Smulw_(ArmEmitterContext context)
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{
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IOpCode32AluMla op = (IOpCode32AluMla)context.CurrOp;
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Operand n = GetIntA32(context, op.Rn);
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Operand m = GetIntA32(context, op.Rm);
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if (op.MHigh)
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{
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m = context.SignExtend16(OperandType.I64, context.ShiftRightUI(m, Const(16)));
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}
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else
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{
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m = context.SignExtend16(OperandType.I64, m);
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}
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Operand res = context.Multiply(context.SignExtend32(OperandType.I64, n), m);
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res = context.ShiftRightUI(res, Const(16));
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res = context.ConvertI64ToI32(res);
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EmitGenericAluStoreA32(context, op.Rd, false, res);
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}
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public static void Umaal(ArmEmitterContext context)
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{
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IOpCode32AluUmull op = (IOpCode32AluUmull)context.CurrOp;
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Operand n = context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.Rn));
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Operand m = context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.Rm));
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Operand dHi = context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.RdHi));
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Operand dLo = context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.RdLo));
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Operand res = context.Multiply(n, m);
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res = context.Add(res, dHi);
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res = context.Add(res, dLo);
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Operand hi = context.ConvertI64ToI32(context.ShiftRightUI(res, Const(32)));
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Operand lo = context.ConvertI64ToI32(res);
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EmitGenericAluStoreA32(context, op.RdHi, false, hi);
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EmitGenericAluStoreA32(context, op.RdLo, false, lo);
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}
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public static void Umlal(ArmEmitterContext context)
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{
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EmitMlal(context, false);
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}
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public static void Umull(ArmEmitterContext context)
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{
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IOpCode32AluUmull op = (IOpCode32AluUmull)context.CurrOp;
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Operand n = context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.Rn));
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Operand m = context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.Rm));
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Operand res = context.Multiply(n, m);
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Operand hi = context.ConvertI64ToI32(context.ShiftRightUI(res, Const(32)));
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Operand lo = context.ConvertI64ToI32(res);
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if (ShouldSetFlags(context))
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{
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EmitNZFlagsCheck(context, res);
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}
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EmitGenericAluStoreA32(context, op.RdHi, ShouldSetFlags(context), hi);
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EmitGenericAluStoreA32(context, op.RdLo, ShouldSetFlags(context), lo);
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}
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private static void EmitMlal(ArmEmitterContext context, bool signed)
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{
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IOpCode32AluUmull op = (IOpCode32AluUmull)context.CurrOp;
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Operand n = GetIntA32(context, op.Rn);
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Operand m = GetIntA32(context, op.Rm);
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if (signed)
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{
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n = context.SignExtend32(OperandType.I64, n);
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m = context.SignExtend32(OperandType.I64, m);
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}
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else
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{
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n = context.ZeroExtend32(OperandType.I64, n);
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m = context.ZeroExtend32(OperandType.I64, m);
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}
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Operand res = context.Multiply(n, m);
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Operand toAdd = context.ShiftLeft(context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.RdHi)), Const(32));
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toAdd = context.BitwiseOr(toAdd, context.ZeroExtend32(OperandType.I64, GetIntA32(context, op.RdLo)));
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res = context.Add(res, toAdd);
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Operand hi = context.ConvertI64ToI32(context.ShiftRightUI(res, Const(32)));
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Operand lo = context.ConvertI64ToI32(res);
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if (ShouldSetFlags(context))
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{
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EmitNZFlagsCheck(context, res);
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}
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EmitGenericAluStoreA32(context, op.RdHi, ShouldSetFlags(context), hi);
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EmitGenericAluStoreA32(context, op.RdLo, ShouldSetFlags(context), lo);
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}
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private static void UpdateQFlag(ArmEmitterContext context, Operand q)
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{
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Operand lblSkipSetQ = Label();
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context.BranchIfFalse(lblSkipSetQ, q);
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SetFlag(context, PState.QFlag, Const(1));
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context.MarkLabel(lblSkipSetQ);
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}
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}
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}
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