From 5c61e860e4f83524ffce10ca447398e83de81640 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Sun, 11 Apr 2021 19:16:12 -0300
Subject: shader: Implement SR_THREAD_KILL

---
 src/shader_recompiler/frontend/ir/ir_emitter.cpp                      | 4 ++++
 src/shader_recompiler/frontend/ir/ir_emitter.h                        | 2 ++
 src/shader_recompiler/frontend/ir/opcodes.inc                         | 1 +
 .../frontend/maxwell/translate/impl/move_special_register.cpp         | 2 ++
 4 files changed, 9 insertions(+)

(limited to 'src/shader_recompiler/frontend')

diff --git a/src/shader_recompiler/frontend/ir/ir_emitter.cpp b/src/shader_recompiler/frontend/ir/ir_emitter.cpp
index a3339f624..54a273a92 100644
--- a/src/shader_recompiler/frontend/ir/ir_emitter.cpp
+++ b/src/shader_recompiler/frontend/ir/ir_emitter.cpp
@@ -347,6 +347,10 @@ U32 IREmitter::LocalInvocationIdZ() {
     return U32{CompositeExtract(Inst(Opcode::LocalInvocationId), 2)};
 }
 
+U1 IREmitter::IsHelperInvocation() {
+    return Inst<U1>(Opcode::IsHelperInvocation);
+}
+
 U32 IREmitter::LaneId() {
     return Inst<U32>(Opcode::LaneId);
 }
diff --git a/src/shader_recompiler/frontend/ir/ir_emitter.h b/src/shader_recompiler/frontend/ir/ir_emitter.h
index f9cbf1304..d04224707 100644
--- a/src/shader_recompiler/frontend/ir/ir_emitter.h
+++ b/src/shader_recompiler/frontend/ir/ir_emitter.h
@@ -90,6 +90,8 @@ public:
     [[nodiscard]] U32 LocalInvocationIdY();
     [[nodiscard]] U32 LocalInvocationIdZ();
 
+    [[nodiscard]] U1 IsHelperInvocation();
+
     [[nodiscard]] U32 LaneId();
 
     [[nodiscard]] U32 LoadGlobalU8(const U64& address);
diff --git a/src/shader_recompiler/frontend/ir/opcodes.inc b/src/shader_recompiler/frontend/ir/opcodes.inc
index dc776a73e..f70008682 100644
--- a/src/shader_recompiler/frontend/ir/opcodes.inc
+++ b/src/shader_recompiler/frontend/ir/opcodes.inc
@@ -58,6 +58,7 @@ OPCODE(SetCFlag,                                            Void,           U1,
 OPCODE(SetOFlag,                                            Void,           U1,                                                                             )
 OPCODE(WorkgroupId,                                         U32x3,                                                                                          )
 OPCODE(LocalInvocationId,                                   U32x3,                                                                                          )
+OPCODE(IsHelperInvocation,                                  U1,                                                                                             )
 
 // Undefined
 OPCODE(UndefU1,                                             U1,                                                                                             )
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/move_special_register.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/move_special_register.cpp
index be1f21e7b..50650cc56 100644
--- a/src/shader_recompiler/frontend/maxwell/translate/impl/move_special_register.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/move_special_register.cpp
@@ -113,6 +113,8 @@ enum class SpecialRegister : u64 {
 
 [[nodiscard]] IR::U32 Read(IR::IREmitter& ir, SpecialRegister special_register) {
     switch (special_register) {
+    case SpecialRegister::SR_THREAD_KILL:
+        return IR::U32{ir.Select(ir.IsHelperInvocation(), ir.Imm32(-1), ir.Imm32(0))};
     case SpecialRegister::SR_TID_X:
         return ir.LocalInvocationIdX();
     case SpecialRegister::SR_TID_Y:
-- 
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