aboutsummaryrefslogtreecommitdiff
path: root/ARMeilleure/Instructions/InstEmitAlu.cs
diff options
context:
space:
mode:
Diffstat (limited to 'ARMeilleure/Instructions/InstEmitAlu.cs')
-rw-r--r--ARMeilleure/Instructions/InstEmitAlu.cs369
1 files changed, 369 insertions, 0 deletions
diff --git a/ARMeilleure/Instructions/InstEmitAlu.cs b/ARMeilleure/Instructions/InstEmitAlu.cs
new file mode 100644
index 00000000..947c9f70
--- /dev/null
+++ b/ARMeilleure/Instructions/InstEmitAlu.cs
@@ -0,0 +1,369 @@
+using ARMeilleure.Decoders;
+using ARMeilleure.IntermediateRepresentation;
+using ARMeilleure.State;
+using ARMeilleure.Translation;
+
+using static ARMeilleure.Instructions.InstEmitAluHelper;
+using static ARMeilleure.Instructions.InstEmitHelper;
+using static ARMeilleure.IntermediateRepresentation.OperandHelper;
+
+namespace ARMeilleure.Instructions
+{
+ static partial class InstEmit
+ {
+ public static void Adc(ArmEmitterContext context) => EmitAdc(context, setFlags: false);
+ public static void Adcs(ArmEmitterContext context) => EmitAdc(context, setFlags: true);
+
+ private static void EmitAdc(ArmEmitterContext context, bool setFlags)
+ {
+ Operand n = GetAluN(context);
+ Operand m = GetAluM(context);
+
+ Operand d = context.Add(n, m);
+
+ Operand carry = GetFlag(PState.CFlag);
+
+ if (context.CurrOp.RegisterSize == RegisterSize.Int64)
+ {
+ carry = context.ZeroExtend32(OperandType.I64, carry);
+ }
+
+ d = context.Add(d, carry);
+
+ if (setFlags)
+ {
+ EmitNZFlagsCheck(context, d);
+
+ EmitAdcsCCheck(context, n, d);
+ EmitAddsVCheck(context, n, m, d);
+ }
+
+ SetAluDOrZR(context, d);
+ }
+
+ public static void Add(ArmEmitterContext context)
+ {
+ SetAluD(context, context.Add(GetAluN(context), GetAluM(context)));
+ }
+
+ public static void Adds(ArmEmitterContext context)
+ {
+ Operand n = GetAluN(context);
+ Operand m = GetAluM(context);
+
+ context.MarkComparison(n, m);
+
+ Operand d = context.Add(n, m);
+
+ EmitNZFlagsCheck(context, d);
+
+ EmitAddsCCheck(context, n, d);
+ EmitAddsVCheck(context, n, m, d);
+
+ SetAluDOrZR(context, d);
+ }
+
+ public static void And(ArmEmitterContext context)
+ {
+ SetAluD(context, context.BitwiseAnd(GetAluN(context), GetAluM(context)));
+ }
+
+ public static void Ands(ArmEmitterContext context)
+ {
+ Operand n = GetAluN(context);
+ Operand m = GetAluM(context);
+
+ Operand d = context.BitwiseAnd(n, m);
+
+ EmitNZFlagsCheck(context, d);
+ EmitCVFlagsClear(context);
+
+ SetAluDOrZR(context, d);
+ }
+
+ public static void Asrv(ArmEmitterContext context)
+ {
+ SetAluDOrZR(context, context.ShiftRightSI(GetAluN(context), GetAluMShift(context)));
+ }
+
+ public static void Bic(ArmEmitterContext context) => EmitBic(context, setFlags: false);
+ public static void Bics(ArmEmitterContext context) => EmitBic(context, setFlags: true);
+
+ private static void EmitBic(ArmEmitterContext context, bool setFlags)
+ {
+ Operand n = GetAluN(context);
+ Operand m = GetAluM(context);
+
+ Operand d = context.BitwiseAnd(n, context.BitwiseNot(m));
+
+ if (setFlags)
+ {
+ EmitNZFlagsCheck(context, d);
+ EmitCVFlagsClear(context);
+ }
+
+ SetAluD(context, d, setFlags);
+ }
+
+ public static void Cls(ArmEmitterContext context)
+ {
+ OpCodeAlu op = (OpCodeAlu)context.CurrOp;
+
+ Operand n = GetIntOrZR(context, op.Rn);
+
+ Operand nHigh = context.ShiftRightUI(n, Const(1));
+
+ bool is32Bits = op.RegisterSize == RegisterSize.Int32;
+
+ Operand mask = is32Bits ? Const(int.MaxValue) : Const(long.MaxValue);
+
+ Operand nLow = context.BitwiseAnd(n, mask);
+
+ Operand res = context.CountLeadingZeros(context.BitwiseExclusiveOr(nHigh, nLow));
+
+ res = context.Subtract(res, Const(res.Type, 1));
+
+ SetAluDOrZR(context, res);
+ }
+
+ public static void Clz(ArmEmitterContext context)
+ {
+ OpCodeAlu op = (OpCodeAlu)context.CurrOp;
+
+ Operand n = GetIntOrZR(context, op.Rn);
+
+ Operand d = context.CountLeadingZeros(n);
+
+ SetAluDOrZR(context, d);
+ }
+
+ public static void Eon(ArmEmitterContext context)
+ {
+ Operand n = GetAluN(context);
+ Operand m = GetAluM(context);
+
+ Operand d = context.BitwiseExclusiveOr(n, context.BitwiseNot(m));
+
+ SetAluD(context, d);
+ }
+
+ public static void Eor(ArmEmitterContext context)
+ {
+ SetAluD(context, context.BitwiseExclusiveOr(GetAluN(context), GetAluM(context)));
+ }
+
+ public static void Extr(ArmEmitterContext context)
+ {
+ OpCodeAluRs op = (OpCodeAluRs)context.CurrOp;
+
+ Operand res = GetIntOrZR(context, op.Rm);
+
+ if (op.Shift != 0)
+ {
+ if (op.Rn == op.Rm)
+ {
+ res = context.RotateRight(res, Const(op.Shift));
+ }
+ else
+ {
+ res = context.ShiftRightUI(res, Const(op.Shift));
+
+ Operand n = GetIntOrZR(context, op.Rn);
+
+ int invShift = op.GetBitsCount() - op.Shift;
+
+ res = context.BitwiseOr(res, context.ShiftLeft(n, Const(invShift)));
+ }
+ }
+
+ SetAluDOrZR(context, res);
+ }
+
+ public static void Lslv(ArmEmitterContext context)
+ {
+ SetAluDOrZR(context, context.ShiftLeft(GetAluN(context), GetAluMShift(context)));
+ }
+
+ public static void Lsrv(ArmEmitterContext context)
+ {
+ SetAluDOrZR(context, context.ShiftRightUI(GetAluN(context), GetAluMShift(context)));
+ }
+
+ public static void Sbc(ArmEmitterContext context) => EmitSbc(context, setFlags: false);
+ public static void Sbcs(ArmEmitterContext context) => EmitSbc(context, setFlags: true);
+
+ private static void EmitSbc(ArmEmitterContext context, bool setFlags)
+ {
+ Operand n = GetAluN(context);
+ Operand m = GetAluM(context);
+
+ Operand d = context.Subtract(n, m);
+
+ Operand borrow = context.BitwiseExclusiveOr(GetFlag(PState.CFlag), Const(1));
+
+ if (context.CurrOp.RegisterSize == RegisterSize.Int64)
+ {
+ borrow = context.ZeroExtend32(OperandType.I64, borrow);
+ }
+
+ d = context.Subtract(d, borrow);
+
+ if (setFlags)
+ {
+ EmitNZFlagsCheck(context, d);
+
+ EmitSbcsCCheck(context, n, m);
+ EmitSubsVCheck(context, n, m, d);
+ }
+
+ SetAluDOrZR(context, d);
+ }
+
+ public static void Sub(ArmEmitterContext context)
+ {
+ SetAluD(context, context.Subtract(GetAluN(context), GetAluM(context)));
+ }
+
+ public static void Subs(ArmEmitterContext context)
+ {
+ Operand n = GetAluN(context);
+ Operand m = GetAluM(context);
+
+ context.MarkComparison(n, m);
+
+ Operand d = context.Subtract(n, m);
+
+ EmitNZFlagsCheck(context, d);
+
+ EmitSubsCCheck(context, n, m);
+ EmitSubsVCheck(context, n, m, d);
+
+ SetAluDOrZR(context, d);
+ }
+
+ public static void Orn(ArmEmitterContext context)
+ {
+ Operand n = GetAluN(context);
+ Operand m = GetAluM(context);
+
+ Operand d = context.BitwiseOr(n, context.BitwiseNot(m));
+
+ SetAluD(context, d);
+ }
+
+ public static void Orr(ArmEmitterContext context)
+ {
+ SetAluD(context, context.BitwiseOr(GetAluN(context), GetAluM(context)));
+ }
+
+ public static void Rbit(ArmEmitterContext context)
+ {
+ OpCodeAlu op = (OpCodeAlu)context.CurrOp;
+
+ Operand n = GetIntOrZR(context, op.Rn);
+ Operand d;
+
+ if (op.RegisterSize == RegisterSize.Int32)
+ {
+ d = context.Call(new _U32_U32(SoftFallback.ReverseBits32), n);
+ }
+ else
+ {
+ d = context.Call(new _U64_U64(SoftFallback.ReverseBits64), n);
+ }
+
+ SetAluDOrZR(context, d);
+ }
+
+ public static void Rev16(ArmEmitterContext context)
+ {
+ OpCodeAlu op = (OpCodeAlu)context.CurrOp;
+
+ Operand n = GetIntOrZR(context, op.Rn);
+ Operand d;
+
+ if (op.RegisterSize == RegisterSize.Int32)
+ {
+ d = context.Call(new _U32_U32(SoftFallback.ReverseBytes16_32), n);
+ }
+ else
+ {
+ d = context.Call(new _U64_U64(SoftFallback.ReverseBytes16_64), n);
+ }
+
+ SetAluDOrZR(context, d);
+ }
+
+ public static void Rev32(ArmEmitterContext context)
+ {
+ OpCodeAlu op = (OpCodeAlu)context.CurrOp;
+
+ Operand n = GetIntOrZR(context, op.Rn);
+
+ if (op.RegisterSize == RegisterSize.Int32)
+ {
+ SetAluDOrZR(context, context.ByteSwap(n));
+ }
+ else
+ {
+ Operand d = context.Call(new _U64_U64(SoftFallback.ReverseBytes32_64), n);
+
+ SetAluDOrZR(context, d);
+ }
+ }
+
+ public static void Rev64(ArmEmitterContext context)
+ {
+ OpCodeAlu op = (OpCodeAlu)context.CurrOp;
+
+ SetAluDOrZR(context, context.ByteSwap(GetIntOrZR(context, op.Rn)));
+ }
+
+ public static void Rorv(ArmEmitterContext context)
+ {
+ SetAluDOrZR(context, context.RotateRight(GetAluN(context), GetAluMShift(context)));
+ }
+
+ private static Operand GetAluMShift(ArmEmitterContext context)
+ {
+ IOpCodeAluRs op = (IOpCodeAluRs)context.CurrOp;
+
+ Operand m = GetIntOrZR(context, op.Rm);
+
+ if (op.RegisterSize == RegisterSize.Int64)
+ {
+ m = context.ConvertI64ToI32(m);
+ }
+
+ return context.BitwiseAnd(m, Const(context.CurrOp.GetBitsCount() - 1));
+ }
+
+ private static void EmitCVFlagsClear(ArmEmitterContext context)
+ {
+ SetFlag(context, PState.CFlag, Const(0));
+ SetFlag(context, PState.VFlag, Const(0));
+ }
+
+ public static void SetAluD(ArmEmitterContext context, Operand d)
+ {
+ SetAluD(context, d, x31IsZR: false);
+ }
+
+ public static void SetAluDOrZR(ArmEmitterContext context, Operand d)
+ {
+ SetAluD(context, d, x31IsZR: true);
+ }
+
+ public static void SetAluD(ArmEmitterContext context, Operand d, bool x31IsZR)
+ {
+ IOpCodeAlu op = (IOpCodeAlu)context.CurrOp;
+
+ if ((x31IsZR || op is IOpCodeAluRs) && op.Rd == RegisterConsts.ZeroIndex)
+ {
+ return;
+ }
+
+ SetIntOrSP(context, op.Rd, d);
+ }
+ }
+}