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Implemented fast paths for: (#846)

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* opt

* Nit.

* opt_p2

* Nit.
This commit is contained in:
LDj3SNuD 2019-12-30 02:22:47 +01:00 • committed by gdkchan
parent ad84f3a7b3
commit 0915731a9d
17 changed files with 856 additions and 379 deletions
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81
ARMeilleure/Instructions/InstEmitAlu.cs
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@ -2,6 +2,7 @@ using ARMeilleure.Decoders;
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.State;
using ARMeilleure.Translation;
using System.Diagnostics;
using static ARMeilleure.Instructions.InstEmitAluHelper;
using static ARMeilleure.Instructions.InstEmitHelper;
@ -265,16 +266,52 @@ namespace ARMeilleure.Instructions
if (op.RegisterSize == RegisterSize.Int32)
{
d = context.Call(new _U32_U32(SoftFallback.ReverseBits32), n);
d = EmitReverseBits32Op(context, n);
}
else
{
d = context.Call(new _U64_U64(SoftFallback.ReverseBits64), n);
d = EmitReverseBits64Op(context, n);
}
SetAluDOrZR(context, d);
}
private static Operand EmitReverseBits32Op(ArmEmitterContext context, Operand op)
{
Debug.Assert(op.Type == OperandType.I32);
Operand val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(op, Const(0xaaaaaaaau)), Const(1)),
context.ShiftLeft (context.BitwiseAnd(op, Const(0x55555555u)), Const(1)));
val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xccccccccu)), Const(2)),
context.ShiftLeft (context.BitwiseAnd(val, Const(0x33333333u)), Const(2)));
val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xf0f0f0f0u)), Const(4)),
context.ShiftLeft (context.BitwiseAnd(val, Const(0x0f0f0f0fu)), Const(4)));
val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xff00ff00u)), Const(8)),
context.ShiftLeft (context.BitwiseAnd(val, Const(0x00ff00ffu)), Const(8)));
return context.BitwiseOr(context.ShiftRightUI(val, Const(16)), context.ShiftLeft(val, Const(16)));
}
private static Operand EmitReverseBits64Op(ArmEmitterContext context, Operand op)
{
Debug.Assert(op.Type == OperandType.I64);
Operand val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(op, Const(0xaaaaaaaaaaaaaaaaul)), Const(1)),
context.ShiftLeft (context.BitwiseAnd(op, Const(0x5555555555555555ul)), Const(1)));
val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xccccccccccccccccul)), Const(2)),
context.ShiftLeft (context.BitwiseAnd(val, Const(0x3333333333333333ul)), Const(2)));
val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xf0f0f0f0f0f0f0f0ul)), Const(4)),
context.ShiftLeft (context.BitwiseAnd(val, Const(0x0f0f0f0f0f0f0f0ful)), Const(4)));
val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xff00ff00ff00ff00ul)), Const(8)),
context.ShiftLeft (context.BitwiseAnd(val, Const(0x00ff00ff00ff00fful)), Const(8)));
val = context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xffff0000ffff0000ul)), Const(16)),
context.ShiftLeft (context.BitwiseAnd(val, Const(0x0000ffff0000fffful)), Const(16)));
return context.BitwiseOr(context.ShiftRightUI(val, Const(32)), context.ShiftLeft(val, Const(32)));
}
public static void Rev16(ArmEmitterContext context)
{
OpCodeAlu op = (OpCodeAlu)context.CurrOp;
@ -284,32 +321,60 @@ namespace ARMeilleure.Instructions
if (op.RegisterSize == RegisterSize.Int32)
{
d = context.Call(new _U32_U32(SoftFallback.ReverseBytes16_32), n);
d = EmitReverseBytes16_32Op(context, n);
}
else
{
d = context.Call(new _U64_U64(SoftFallback.ReverseBytes16_64), n);
d = EmitReverseBytes16_64Op(context, n);
}
SetAluDOrZR(context, d);
}
private static Operand EmitReverseBytes16_32Op(ArmEmitterContext context, Operand op)
{
Debug.Assert(op.Type == OperandType.I32);
Operand val = EmitReverseBytes16_64Op(context, context.ZeroExtend32(OperandType.I64, op));
return context.ConvertI64ToI32(val);
}
private static Operand EmitReverseBytes16_64Op(ArmEmitterContext context, Operand op)
{
Debug.Assert(op.Type == OperandType.I64);
return context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(op, Const(0xff00ff00ff00ff00ul)), Const(8)),
context.ShiftLeft (context.BitwiseAnd(op, Const(0x00ff00ff00ff00fful)), Const(8)));
}
public static void Rev32(ArmEmitterContext context)
{
OpCodeAlu op = (OpCodeAlu)context.CurrOp;
Operand n = GetIntOrZR(context, op.Rn);
Operand d;
if (op.RegisterSize == RegisterSize.Int32)
{
SetAluDOrZR(context, context.ByteSwap(n));
d = context.ByteSwap(n);
}
else
{
Operand d = context.Call(new _U64_U64(SoftFallback.ReverseBytes32_64), n);
SetAluDOrZR(context, d);
d = EmitReverseBytes32_64Op(context, n);
}
SetAluDOrZR(context, d);
}
private static Operand EmitReverseBytes32_64Op(ArmEmitterContext context, Operand op)
{
Debug.Assert(op.Type == OperandType.I64);
Operand val = EmitReverseBytes16_64Op(context, op);
return context.BitwiseOr(context.ShiftRightUI(context.BitwiseAnd(val, Const(0xffff0000ffff0000ul)), Const(16)),
context.ShiftLeft (context.BitwiseAnd(val, Const(0x0000ffff0000fffful)), Const(16)));
}
public static void Rev64(ArmEmitterContext context)