98e05ee4b7
* Decoders: Add InITBlock argument
* OpCodeTable: Minor cleanup
* OpCodeTable: Remove existing thumb instruction implementations
* OpCodeTable: Prepare for thumb instructions
* OpCodeTables: Improve thumb fast lookup
* Tests: Prepare for thumb tests
* T16: Implement BX
* T16: Implement LSL/LSR/ASR (imm)
* T16: Implement ADDS, SUBS (reg)
* T16: Implement ADDS, SUBS (3-bit immediate)
* T16: Implement MOVS, CMP, ADDS, SUBS (8-bit immediate)
* T16: Implement ANDS, EORS, LSLS, LSRS, ASRS, ADCS, SBCS, RORS, TST, NEGS, CMP, CMN, ORRS, MULS, BICS, MVNS (low registers)
* T16: Implement ADD, CMP, MOV (high reg)
* T16: Implement BLX (reg)
* T16: Implement LDR (literal)
* T16: Implement {LDR,STR}{,H,B,SB,SH} (register)
* T16: Implement {LDR,STR}{,B,H} (immediate)
* T16: Implement LDR/STR (SP)
* T16: Implement ADR
* T16: Implement Add to SP (immediate)
* T16: Implement ADD/SUB (SP)
* T16: Implement SXTH, SXTB, UXTH, UTXB
* T16: Implement CBZ, CBNZ
* T16: Implement PUSH, POP
* T16: Implement REV, REV16, REVSH
* T16: Implement NOP
* T16: Implement LDM, STM
* T16: Implement SVC
* T16: Implement B (conditional)
* T16: Implement B (unconditional)
* T16: Implement IT
* fixup! T16: Implement ADD/SUB (SP)
* fixup! T16: Implement Add to SP (immediate)
* fixup! T16: Implement IT
* CpuTestThumb: Add randomized tests
* Remove inITBlock argument
* Address nits
* Use index to handle IfThenBlockState
* Reduce line noise
* fixup
* nit
380 lines
12 KiB
C#
380 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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OpCode32AluMla op = (OpCode32AluMla)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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OpCode32AluMla op = (OpCode32AluMla)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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OpCode32AluMla op = (OpCode32AluMla)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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OpCode32AluMla op = (OpCode32AluMla)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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OpCode32AluUmull op = (OpCode32AluUmull)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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OpCode32AluMla op = (OpCode32AluMla)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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OpCode32AluMla op = (OpCode32AluMla)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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OpCode32AluUmull op = (OpCode32AluUmull)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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OpCode32AluMla op = (OpCode32AluMla)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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OpCode32AluUmull op = (OpCode32AluUmull)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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OpCode32AluUmull op = (OpCode32AluUmull)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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OpCode32AluUmull op = (OpCode32AluUmull)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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