9 files changed, 25 insertions, 0 deletions

diff --git a/src/shader_recompiler/backend/glasm/emit_glasm_instructions.h b/src/shader_recompiler/backend/glasm/emit_glasm_instructions.h
index 12afda43b..cb7232704 100644
--- a/src/shader_recompiler/backend/glasm/emit_glasm_instructions.h
+++ b/src/shader_recompiler/backend/glasm/emit_glasm_instructions.h
@@ -72,6 +72,7 @@ void EmitInvocationId(EmitContext& ctx, IR::Inst& inst);
 void EmitSampleId(EmitContext& ctx, IR::Inst& inst);
 void EmitIsHelperInvocation(EmitContext& ctx, IR::Inst& inst);
 void EmitYDirection(EmitContext& ctx, IR::Inst& inst);
+void EmitResolutionDownFactor(EmitContext& ctx, IR::Inst& inst);
 void EmitLoadLocal(EmitContext& ctx, IR::Inst& inst, ScalarU32 word_offset);
 void EmitWriteLocal(EmitContext& ctx, ScalarU32 word_offset, ScalarU32 value);
 void EmitUndefU1(EmitContext& ctx, IR::Inst& inst);
diff --git a/src/shader_recompiler/backend/glasm/emit_glasm_not_implemented.cpp b/src/shader_recompiler/backend/glasm/emit_glasm_not_implemented.cpp
index e537f6073..807494063 100644
--- a/src/shader_recompiler/backend/glasm/emit_glasm_not_implemented.cpp
+++ b/src/shader_recompiler/backend/glasm/emit_glasm_not_implemented.cpp
@@ -210,6 +210,11 @@ void EmitYDirection(EmitContext& ctx, IR::Inst& inst) {
     ctx.Add("MOV.F {}.x,y_direction[0].w;", inst);
 }
 
+void EmitResolutionDownFactor(EmitContext& ctx, IR::Inst& inst) {
+    UNIMPLEMENTED();
+    ctx.Add("MOV.F {}.x,1;", inst);
+}
+
 void EmitUndefU1(EmitContext& ctx, IR::Inst& inst) {
     ctx.Add("MOV.S {}.x,0;", inst);
 }
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
index 170db269a..f4ed090e3 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
@@ -445,6 +445,11 @@ void EmitYDirection(EmitContext& ctx, IR::Inst& inst) {
     ctx.AddF32("{}=gl_FrontMaterial.ambient.a;", inst);
 }
 
+void EmitResolutionDownFactor(EmitContext& ctx, IR::Inst& inst) {
+    UNIMPLEMENTED();
+    ctx.AddF32("{}=1.0f;", inst);
+}
+
 void EmitLoadLocal(EmitContext& ctx, IR::Inst& inst, std::string_view word_offset) {
     ctx.AddU32("{}=lmem[{}];", inst, word_offset);
 }
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h b/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
index 5936d086f..6cae0b84a 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
@@ -85,6 +85,7 @@ void EmitInvocationId(EmitContext& ctx, IR::Inst& inst);
 void EmitSampleId(EmitContext& ctx, IR::Inst& inst);
 void EmitIsHelperInvocation(EmitContext& ctx, IR::Inst& inst);
 void EmitYDirection(EmitContext& ctx, IR::Inst& inst);
+void EmitResolutionDownFactor(EmitContext& ctx, IR::Inst& inst);
 void EmitLoadLocal(EmitContext& ctx, IR::Inst& inst, std::string_view word_offset);
 void EmitWriteLocal(EmitContext& ctx, std::string_view word_offset, std::string_view value);
 void EmitUndefU1(EmitContext& ctx, IR::Inst& inst);
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
index d3a93d5f4..43f440dfb 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
@@ -526,6 +526,11 @@ Id EmitYDirection(EmitContext& ctx) {
     return ctx.Const(ctx.runtime_info.y_negate ? -1.0f : 1.0f);
 }
 
+Id EmitResolutionDownFactor(EmitContext& ctx) {
+    UNIMPLEMENTED();
+    return ctx.Const(1.0f);
+}
+
 Id EmitLoadLocal(EmitContext& ctx, Id word_offset) {
     const Id pointer{ctx.OpAccessChain(ctx.private_u32, ctx.local_memory, word_offset)};
     return ctx.OpLoad(ctx.U32[1], pointer);
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_instructions.h b/src/shader_recompiler/backend/spirv/emit_spirv_instructions.h
index c9db1c164..3d90b2286 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_instructions.h
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_instructions.h
@@ -75,6 +75,7 @@ Id EmitInvocationId(EmitContext& ctx);
 Id EmitSampleId(EmitContext& ctx);
 Id EmitIsHelperInvocation(EmitContext& ctx);
 Id EmitYDirection(EmitContext& ctx);
+Id EmitResolutionDownFactor(EmitContext& ctx);
 Id EmitLoadLocal(EmitContext& ctx, Id word_offset);
 void EmitWriteLocal(EmitContext& ctx, Id word_offset, Id value);
 Id EmitUndefU1(EmitContext& ctx);
diff --git a/src/shader_recompiler/frontend/ir/ir_emitter.cpp b/src/shader_recompiler/frontend/ir/ir_emitter.cpp
index 13159a68d..9ae5da2a1 100644
--- a/src/shader_recompiler/frontend/ir/ir_emitter.cpp
+++ b/src/shader_recompiler/frontend/ir/ir_emitter.cpp
@@ -375,6 +375,10 @@ F32 IREmitter::YDirection() {
     return Inst<F32>(Opcode::YDirection);
 }
 
+F32 IREmitter::ResolutionDownFactor() {
+    return Inst<F32>(Opcode::ResolutionDownFactor);
+}
+
 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 1b89ca5a0..0c664d2fe 100644
--- a/src/shader_recompiler/frontend/ir/ir_emitter.h
+++ b/src/shader_recompiler/frontend/ir/ir_emitter.h
@@ -102,6 +102,8 @@ public:
     [[nodiscard]] U1 IsHelperInvocation();
     [[nodiscard]] F32 YDirection();
 
+    [[nodiscard]] F32 ResolutionDownFactor();
+
     [[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 d91098c80..72751c5a0 100644
--- a/src/shader_recompiler/frontend/ir/opcodes.inc
+++ b/src/shader_recompiler/frontend/ir/opcodes.inc
@@ -62,6 +62,7 @@ OPCODE(InvocationId,                                        U32,
 OPCODE(SampleId,                                            U32,                                                                                            )
 OPCODE(IsHelperInvocation,                                  U1,                                                                                             )
 OPCODE(YDirection,                                          F32,                                                                                            )
+OPCODE(ResolutionDownFactor,                                F32,                                                                                            )
 
 // Undefined
 OPCODE(UndefU1,                                             U1,                                                                                             )