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using Ryujinx.Graphics.Shader.Decoders;
using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using Ryujinx.Graphics.Shader.Translation;
using System;
using static Ryujinx.Graphics.Shader.Instructions.InstEmitHelper;
using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
namespace Ryujinx.Graphics.Shader.Instructions
{
static class InstEmitAluHelper
{
public static long GetIntMin(IDstFmt type)
{
return type switch
{
IDstFmt.U16 => ushort.MinValue,
IDstFmt.S16 => short.MinValue,
IDstFmt.U32 => uint.MinValue,
IDstFmt.S32 => int.MinValue,
_ => throw new ArgumentException($"The type \"{type}\" is not a supported integer type."),
};
}
public static long GetIntMax(IDstFmt type)
{
return type switch
{
IDstFmt.U16 => ushort.MaxValue,
IDstFmt.S16 => short.MaxValue,
IDstFmt.U32 => uint.MaxValue,
IDstFmt.S32 => int.MaxValue,
_ => throw new ArgumentException($"The type \"{type}\" is not a supported integer type."),
};
}
public static long GetIntMin(ISrcDstFmt type)
{
return type switch
{
ISrcDstFmt.U8 => byte.MinValue,
ISrcDstFmt.S8 => sbyte.MinValue,
ISrcDstFmt.U16 => ushort.MinValue,
ISrcDstFmt.S16 => short.MinValue,
ISrcDstFmt.U32 => uint.MinValue,
ISrcDstFmt.S32 => int.MinValue,
_ => throw new ArgumentException($"The type \"{type}\" is not a supported integer type."),
};
}
public static long GetIntMax(ISrcDstFmt type)
{
return type switch
{
ISrcDstFmt.U8 => byte.MaxValue,
ISrcDstFmt.S8 => sbyte.MaxValue,
ISrcDstFmt.U16 => ushort.MaxValue,
ISrcDstFmt.S16 => short.MaxValue,
ISrcDstFmt.U32 => uint.MaxValue,
ISrcDstFmt.S32 => int.MaxValue,
_ => throw new ArgumentException($"The type \"{type}\" is not a supported integer type."),
};
}
public static Operand GetPredLogicalOp(EmitterContext context, BoolOp logicOp, Operand input, Operand pred)
{
return logicOp switch
{
BoolOp.And => context.BitwiseAnd(input, pred),
BoolOp.Or => context.BitwiseOr(input, pred),
BoolOp.Xor => context.BitwiseExclusiveOr(input, pred),
_ => input,
};
}
public static Operand Extend(EmitterContext context, Operand src, VectorSelect type)
{
return type switch
{
VectorSelect.U8B0 => ZeroExtendTo32(context, context.ShiftRightU32(src, Const(0)), 8),
VectorSelect.U8B1 => ZeroExtendTo32(context, context.ShiftRightU32(src, Const(8)), 8),
VectorSelect.U8B2 => ZeroExtendTo32(context, context.ShiftRightU32(src, Const(16)), 8),
VectorSelect.U8B3 => ZeroExtendTo32(context, context.ShiftRightU32(src, Const(24)), 8),
VectorSelect.U16H0 => ZeroExtendTo32(context, context.ShiftRightU32(src, Const(0)), 16),
VectorSelect.U16H1 => ZeroExtendTo32(context, context.ShiftRightU32(src, Const(16)), 16),
VectorSelect.S8B0 => SignExtendTo32(context, context.ShiftRightU32(src, Const(0)), 8),
VectorSelect.S8B1 => SignExtendTo32(context, context.ShiftRightU32(src, Const(8)), 8),
VectorSelect.S8B2 => SignExtendTo32(context, context.ShiftRightU32(src, Const(16)), 8),
VectorSelect.S8B3 => SignExtendTo32(context, context.ShiftRightU32(src, Const(24)), 8),
VectorSelect.S16H0 => SignExtendTo32(context, context.ShiftRightU32(src, Const(0)), 16),
VectorSelect.S16H1 => SignExtendTo32(context, context.ShiftRightU32(src, Const(16)), 16),
_ => src,
};
}
public static void SetZnFlags(EmitterContext context, Operand dest, bool setCC, bool extended = false)
{
if (!setCC)
{
return;
}
if (extended)
{
// When the operation is extended, it means we are doing
// the operation on a long word with any number of bits,
// so we need to AND the zero flag from result with the
// previous result when extended is specified, to ensure
// we have ZF set only if all words are zero, and not just
// the last one.
Operand oldZF = GetZF();
Operand res = context.BitwiseAnd(context.ICompareEqual(dest, Const(0)), oldZF);
context.Copy(GetZF(), res);
}
else
{
context.Copy(GetZF(), context.ICompareEqual(dest, Const(0)));
}
context.Copy(GetNF(), context.ICompareLess(dest, Const(0)));
}
public static void SetFPZnFlags(EmitterContext context, Operand dest, bool setCC, Instruction fpType = Instruction.FP32)
{
if (setCC)
{
Operand zero = ConstF(0);
if (fpType == Instruction.FP64)
{
zero = context.FP32ConvertToFP64(zero);
}
context.Copy(GetZF(), context.FPCompareEqual(dest, zero, fpType));
context.Copy(GetNF(), context.FPCompareLess(dest, zero, fpType));
}
}
public static (Operand, Operand) NegateLong(EmitterContext context, Operand low, Operand high)
{
low = context.BitwiseNot(low);
high = context.BitwiseNot(high);
low = AddWithCarry(context, low, Const(1), out Operand carryOut);
high = context.IAdd(high, carryOut);
return (low, high);
}
public static Operand AddWithCarry(EmitterContext context, Operand lhs, Operand rhs, out Operand carryOut)
{
Operand result = context.IAdd(lhs, rhs);
// C = Rd < Rn
carryOut = context.INegate(context.ICompareLessUnsigned(result, lhs));
return result;
}
}
}
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