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using Ryujinx.Graphics.Shader.Decoders;
using Ryujinx.Graphics.Shader.IntermediateRepresentation;
using Ryujinx.Graphics.Shader.Translation;
using System.Collections.Generic;
using System.Linq;
using static Ryujinx.Graphics.Shader.IntermediateRepresentation.OperandHelper;
namespace Ryujinx.Graphics.Shader.Instructions
{
static partial class InstEmit
{
public static void Bra(EmitterContext context)
{
EmitBranch(context, context.CurrBlock.Branch.Address);
}
public static void Exit(EmitterContext context)
{
OpCodeExit op = (OpCodeExit)context.CurrOp;
//TODO: Figure out how this is supposed to work in the
//presence of other condition codes.
if (op.Condition == Condition.Always)
{
context.Return();
}
}
public static void Kil(EmitterContext context)
{
context.Discard();
}
public static void Ssy(EmitterContext context)
{
OpCodeSsy op = (OpCodeSsy)context.CurrOp;
foreach (KeyValuePair<OpCodeSync, Operand> kv in op.Syncs)
{
OpCodeSync opSync = kv.Key;
Operand local = kv.Value;
int ssyIndex = opSync.Targets[op];
context.Copy(local, Const(ssyIndex));
}
}
public static void Sync(EmitterContext context)
{
OpCodeSync op = (OpCodeSync)context.CurrOp;
if (op.Targets.Count == 1)
{
//If we have only one target, then the SSY is basically
//a branch, we can produce better codegen for this case.
OpCodeSsy opSsy = op.Targets.Keys.First();
EmitBranch(context, opSsy.GetAbsoluteAddress());
}
else
{
foreach (KeyValuePair<OpCodeSsy, int> kv in op.Targets)
{
OpCodeSsy opSsy = kv.Key;
Operand label = context.GetLabel(opSsy.GetAbsoluteAddress());
Operand local = opSsy.Syncs[op];
int ssyIndex = kv.Value;
context.BranchIfTrue(label, context.ICompareEqual(local, Const(ssyIndex)));
}
}
}
private static void EmitBranch(EmitterContext context, ulong address)
{
//If we're branching to the next instruction, then the branch
//is useless and we can ignore it.
if (address == context.CurrOp.Address + 8)
{
return;
}
Operand label = context.GetLabel(address);
Operand pred = Register(context.CurrOp.Predicate);
if (context.CurrOp.Predicate.IsPT)
{
context.Branch(label);
}
else if (context.CurrOp.InvertPredicate)
{
context.BranchIfFalse(label, pred);
}
else
{
context.BranchIfTrue(label, pred);
}
}
}
}
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