diff options
Diffstat (limited to 'ARMeilleure/Instructions/InstEmitAlu.cs')
-rw-r--r-- | ARMeilleure/Instructions/InstEmitAlu.cs | 369 |
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); + } + } +} |