mirror of
https://github.com/Ryujinx/Ryujinx.git
synced 2024-08-18 06:38:42 +02:00
435 lines
14 KiB
C#
435 lines
14 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.Diagnostics;
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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.OperandHelper;
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namespace ARMeilleure.Instructions
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{
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static partial class InstEmit
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{
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public static void Adc(ArmEmitterContext context) => EmitAdc(context, setFlags: false);
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public static void Adcs(ArmEmitterContext context) => EmitAdc(context, setFlags: true);
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private static void EmitAdc(ArmEmitterContext context, bool setFlags)
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{
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Operand n = GetAluN(context);
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Operand m = GetAluM(context);
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Operand d = context.Add(n, m);
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Operand carry = GetFlag(PState.CFlag);
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if (context.CurrOp.RegisterSize == RegisterSize.Int64)
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{
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carry = context.ZeroExtend32(OperandType.I64, carry);
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}
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d = context.Add(d, carry);
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if (setFlags)
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{
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EmitNZFlagsCheck(context, d);
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EmitAdcsCCheck(context, n, d);
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EmitAddsVCheck(context, n, m, d);
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}
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SetAluDOrZR(context, d);
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}
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public static void Add(ArmEmitterContext context)
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{
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SetAluD(context, context.Add(GetAluN(context), GetAluM(context)));
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}
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public static void Adds(ArmEmitterContext context)
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{
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Operand n = GetAluN(context);
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Operand m = GetAluM(context);
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context.MarkComparison(n, m);
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Operand d = context.Add(n, m);
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EmitNZFlagsCheck(context, d);
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EmitAddsCCheck(context, n, d);
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EmitAddsVCheck(context, n, m, d);
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SetAluDOrZR(context, d);
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}
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public static void And(ArmEmitterContext context)
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{
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SetAluD(context, context.BitwiseAnd(GetAluN(context), GetAluM(context)));
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}
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public static void Ands(ArmEmitterContext context)
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{
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Operand n = GetAluN(context);
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Operand m = GetAluM(context);
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Operand d = context.BitwiseAnd(n, m);
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EmitNZFlagsCheck(context, d);
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EmitCVFlagsClear(context);
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SetAluDOrZR(context, d);
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}
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public static void Asrv(ArmEmitterContext context)
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{
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SetAluDOrZR(context, context.ShiftRightSI(GetAluN(context), GetAluMShift(context)));
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}
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public static void Bic(ArmEmitterContext context) => EmitBic(context, setFlags: false);
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public static void Bics(ArmEmitterContext context) => EmitBic(context, setFlags: true);
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private static void EmitBic(ArmEmitterContext context, bool setFlags)
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{
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Operand n = GetAluN(context);
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Operand m = GetAluM(context);
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Operand d = context.BitwiseAnd(n, context.BitwiseNot(m));
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if (setFlags)
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{
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EmitNZFlagsCheck(context, d);
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EmitCVFlagsClear(context);
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}
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SetAluD(context, d, setFlags);
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}
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public static void Cls(ArmEmitterContext context)
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{
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OpCodeAlu op = (OpCodeAlu)context.CurrOp;
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Operand n = GetIntOrZR(context, op.Rn);
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Operand nHigh = context.ShiftRightUI(n, Const(1));
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bool is32Bits = op.RegisterSize == RegisterSize.Int32;
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Operand mask = is32Bits ? Const(int.MaxValue) : Const(long.MaxValue);
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Operand nLow = context.BitwiseAnd(n, mask);
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Operand res = context.CountLeadingZeros(context.BitwiseExclusiveOr(nHigh, nLow));
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res = context.Subtract(res, Const(res.Type, 1));
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SetAluDOrZR(context, res);
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}
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public static void Clz(ArmEmitterContext context)
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{
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OpCodeAlu op = (OpCodeAlu)context.CurrOp;
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Operand n = GetIntOrZR(context, op.Rn);
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Operand d = context.CountLeadingZeros(n);
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SetAluDOrZR(context, d);
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}
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public static void Eon(ArmEmitterContext context)
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{
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Operand n = GetAluN(context);
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Operand m = GetAluM(context);
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Operand d = context.BitwiseExclusiveOr(n, context.BitwiseNot(m));
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SetAluD(context, d);
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}
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public static void Eor(ArmEmitterContext context)
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{
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SetAluD(context, context.BitwiseExclusiveOr(GetAluN(context), GetAluM(context)));
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}
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public static void Extr(ArmEmitterContext context)
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{
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OpCodeAluRs op = (OpCodeAluRs)context.CurrOp;
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Operand res = GetIntOrZR(context, op.Rm);
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if (op.Shift != 0)
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{
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if (op.Rn == op.Rm)
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{
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res = context.RotateRight(res, Const(op.Shift));
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}
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else
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{
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res = context.ShiftRightUI(res, Const(op.Shift));
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Operand n = GetIntOrZR(context, op.Rn);
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int invShift = op.GetBitsCount() - op.Shift;
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res = context.BitwiseOr(res, context.ShiftLeft(n, Const(invShift)));
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}
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}
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SetAluDOrZR(context, res);
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}
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public static void Lslv(ArmEmitterContext context)
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{
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SetAluDOrZR(context, context.ShiftLeft(GetAluN(context), GetAluMShift(context)));
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}
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public static void Lsrv(ArmEmitterContext context)
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{
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SetAluDOrZR(context, context.ShiftRightUI(GetAluN(context), GetAluMShift(context)));
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}
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public static void Sbc(ArmEmitterContext context) => EmitSbc(context, setFlags: false);
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public static void Sbcs(ArmEmitterContext context) => EmitSbc(context, setFlags: true);
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private static void EmitSbc(ArmEmitterContext context, bool setFlags)
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{
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Operand n = GetAluN(context);
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Operand m = GetAluM(context);
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Operand d = context.Subtract(n, m);
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Operand borrow = context.BitwiseExclusiveOr(GetFlag(PState.CFlag), Const(1));
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if (context.CurrOp.RegisterSize == RegisterSize.Int64)
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{
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borrow = context.ZeroExtend32(OperandType.I64, borrow);
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}
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d = context.Subtract(d, borrow);
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if (setFlags)
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{
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EmitNZFlagsCheck(context, d);
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EmitSbcsCCheck(context, n, m);
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EmitSubsVCheck(context, n, m, d);
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}
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SetAluDOrZR(context, d);
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}
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public static void Sub(ArmEmitterContext context)
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{
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SetAluD(context, context.Subtract(GetAluN(context), GetAluM(context)));
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}
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public static void Subs(ArmEmitterContext context)
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{
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Operand n = GetAluN(context);
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Operand m = GetAluM(context);
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context.MarkComparison(n, m);
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Operand d = context.Subtract(n, m);
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EmitNZFlagsCheck(context, d);
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EmitSubsCCheck(context, n, m);
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EmitSubsVCheck(context, n, m, d);
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SetAluDOrZR(context, d);
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}
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public static void Orn(ArmEmitterContext context)
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{
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Operand n = GetAluN(context);
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Operand m = GetAluM(context);
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Operand d = context.BitwiseOr(n, context.BitwiseNot(m));
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SetAluD(context, d);
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}
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public static void Orr(ArmEmitterContext context)
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{
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SetAluD(context, context.BitwiseOr(GetAluN(context), GetAluM(context)));
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}
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public static void Rbit(ArmEmitterContext context)
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{
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OpCodeAlu op = (OpCodeAlu)context.CurrOp;
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Operand n = GetIntOrZR(context, op.Rn);
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Operand d;
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if (op.RegisterSize == RegisterSize.Int32)
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{
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d = EmitReverseBits32Op(context, n);
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}
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else
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{
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d = EmitReverseBits64Op(context, n);
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}
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SetAluDOrZR(context, d);
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}
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private static Operand EmitReverseBits32Op(ArmEmitterContext context, Operand op)
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{
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Debug.Assert(op.Type == OperandType.I32);
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Operand val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(op, Const(0xaaaaaaaau)), Const(1)),
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context.ShiftLeft (context.BitwiseAnd(op, Const(0x55555555u)), Const(1)));
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val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xccccccccu)), Const(2)),
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context.ShiftLeft (context.BitwiseAnd(val, Const(0x33333333u)), Const(2)));
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val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xf0f0f0f0u)), Const(4)),
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context.ShiftLeft (context.BitwiseAnd(val, Const(0x0f0f0f0fu)), Const(4)));
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val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xff00ff00u)), Const(8)),
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context.ShiftLeft (context.BitwiseAnd(val, Const(0x00ff00ffu)), Const(8)));
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return context.BitwiseOr(context.ShiftRightUI(val, Const(16)), context.ShiftLeft(val, Const(16)));
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}
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private static Operand EmitReverseBits64Op(ArmEmitterContext context, Operand op)
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{
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Debug.Assert(op.Type == OperandType.I64);
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Operand val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(op, Const(0xaaaaaaaaaaaaaaaaul)), Const(1)),
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context.ShiftLeft (context.BitwiseAnd(op, Const(0x5555555555555555ul)), Const(1)));
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val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xccccccccccccccccul)), Const(2)),
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context.ShiftLeft (context.BitwiseAnd(val, Const(0x3333333333333333ul)), Const(2)));
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val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xf0f0f0f0f0f0f0f0ul)), Const(4)),
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context.ShiftLeft (context.BitwiseAnd(val, Const(0x0f0f0f0f0f0f0f0ful)), Const(4)));
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val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xff00ff00ff00ff00ul)), Const(8)),
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context.ShiftLeft (context.BitwiseAnd(val, Const(0x00ff00ff00ff00fful)), Const(8)));
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val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xffff0000ffff0000ul)), Const(16)),
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context.ShiftLeft (context.BitwiseAnd(val, Const(0x0000ffff0000fffful)), Const(16)));
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return context.BitwiseOr(context.ShiftRightUI(val, Const(32)), context.ShiftLeft(val, Const(32)));
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}
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public static void Rev16(ArmEmitterContext context)
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{
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OpCodeAlu op = (OpCodeAlu)context.CurrOp;
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Operand n = GetIntOrZR(context, op.Rn);
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Operand d;
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if (op.RegisterSize == RegisterSize.Int32)
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{
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d = EmitReverseBytes16_32Op(context, n);
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}
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else
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{
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d = EmitReverseBytes16_64Op(context, n);
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}
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SetAluDOrZR(context, d);
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}
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private static Operand EmitReverseBytes16_32Op(ArmEmitterContext context, Operand op)
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{
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Debug.Assert(op.Type == OperandType.I32);
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Operand val = EmitReverseBytes16_64Op(context, context.ZeroExtend32(OperandType.I64, op));
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return context.ConvertI64ToI32(val);
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}
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private static Operand EmitReverseBytes16_64Op(ArmEmitterContext context, Operand op)
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{
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Debug.Assert(op.Type == OperandType.I64);
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return context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(op, Const(0xff00ff00ff00ff00ul)), Const(8)),
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context.ShiftLeft (context.BitwiseAnd(op, Const(0x00ff00ff00ff00fful)), Const(8)));
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}
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public static void Rev32(ArmEmitterContext context)
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{
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OpCodeAlu op = (OpCodeAlu)context.CurrOp;
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Operand n = GetIntOrZR(context, op.Rn);
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Operand d;
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if (op.RegisterSize == RegisterSize.Int32)
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{
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d = context.ByteSwap(n);
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}
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else
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{
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d = EmitReverseBytes32_64Op(context, n);
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}
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SetAluDOrZR(context, d);
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}
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private static Operand EmitReverseBytes32_64Op(ArmEmitterContext context, Operand op)
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{
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Debug.Assert(op.Type == OperandType.I64);
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Operand val = EmitReverseBytes16_64Op(context, op);
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return context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xffff0000ffff0000ul)), Const(16)),
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context.ShiftLeft (context.BitwiseAnd(val, Const(0x0000ffff0000fffful)), Const(16)));
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}
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public static void Rev64(ArmEmitterContext context)
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{
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OpCodeAlu op = (OpCodeAlu)context.CurrOp;
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SetAluDOrZR(context, context.ByteSwap(GetIntOrZR(context, op.Rn)));
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}
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public static void Rorv(ArmEmitterContext context)
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{
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SetAluDOrZR(context, context.RotateRight(GetAluN(context), GetAluMShift(context)));
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}
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private static Operand GetAluMShift(ArmEmitterContext context)
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{
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IOpCodeAluRs op = (IOpCodeAluRs)context.CurrOp;
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Operand m = GetIntOrZR(context, op.Rm);
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if (op.RegisterSize == RegisterSize.Int64)
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{
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m = context.ConvertI64ToI32(m);
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}
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return context.BitwiseAnd(m, Const(context.CurrOp.GetBitsCount() - 1));
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}
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private static void EmitCVFlagsClear(ArmEmitterContext context)
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{
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SetFlag(context, PState.CFlag, Const(0));
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SetFlag(context, PState.VFlag, Const(0));
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}
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public static void SetAluD(ArmEmitterContext context, Operand d)
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{
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SetAluD(context, d, x31IsZR: false);
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}
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public static void SetAluDOrZR(ArmEmitterContext context, Operand d)
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{
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SetAluD(context, d, x31IsZR: true);
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}
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public static void SetAluD(ArmEmitterContext context, Operand d, bool x31IsZR)
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{
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IOpCodeAlu op = (IOpCodeAlu)context.CurrOp;
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if ((x31IsZR || op is IOpCodeAluRs) && op.Rd == RegisterConsts.ZeroIndex)
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{
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return;
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}
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SetIntOrSP(context, op.Rd, d);
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}
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}
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}
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