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