Added SR_WScaleFactorZ stubs for all rendering backends in preparation for a Prince of Persia issue fix

src/shader_recompiler/backend/glasm/emit_glasm_context_get_set.cpp

@@ -428,6 +428,10 @@ void EmitSR_WScaleFactorXY(EmitContext& ctx, IR::Inst& inst) {
     LOG_WARNING(Shader, "(STUBBED) called");
 }
 
+void EmitSR_WScaleFactorZ(EmitContext& ctx, IR::Inst& inst) {
+    LOG_WARNING(Shader, "(STUBBED) called");
+}
+
 void EmitYDirection(EmitContext& ctx, IR::Inst& inst) {
     ctx.uses_y_direction = true;
     ctx.Add("MOV.F {}.x,y_direction[0].w;", inst);

src/shader_recompiler/backend/glasm/emit_glasm_instructions.h

@@ -73,6 +73,7 @@ void EmitInvocationInfo(EmitContext& ctx, IR::Inst& inst);
 void EmitSampleId(EmitContext& ctx, IR::Inst& inst);
 void EmitIsHelperInvocation(EmitContext& ctx, IR::Inst& inst);
 void EmitSR_WScaleFactorXY(EmitContext& ctx, IR::Inst& inst);
+void EmitSR_WScaleFactorZ(EmitContext& ctx, IR::Inst& inst);
 void EmitYDirection(EmitContext& ctx, IR::Inst& inst);
 void EmitResolutionDownFactor(EmitContext& ctx, IR::Inst& inst);
 void EmitRenderArea(EmitContext& ctx, IR::Inst& inst);

src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp

@@ -448,6 +448,10 @@ void EmitSR_WScaleFactorXY(EmitContext& ctx, IR::Inst& inst) {
     LOG_WARNING(Shader, "(STUBBED) called");
 }
 
+void EmitSR_WScaleFactorZ(EmitContext& ctx, IR::Inst& inst) {
+    LOG_WARNING(Shader, "(STUBBED) called");
+}
+
 void EmitYDirection(EmitContext& ctx, IR::Inst& inst) {
     ctx.uses_y_direction = true;
     ctx.AddF32("{}=gl_FrontMaterial.ambient.a;", inst);

src/shader_recompiler/backend/glsl/emit_glsl_instructions.h

@@ -87,6 +87,7 @@ void EmitInvocationInfo(EmitContext& ctx, IR::Inst& inst);
 void EmitSampleId(EmitContext& ctx, IR::Inst& inst);
 void EmitIsHelperInvocation(EmitContext& ctx, IR::Inst& inst);
 void EmitSR_WScaleFactorXY(EmitContext& ctx, IR::Inst& inst);
+void EmitSR_WScaleFactorZ(EmitContext& ctx, IR::Inst& inst);
 void EmitYDirection(EmitContext& ctx, IR::Inst& inst);
 void EmitResolutionDownFactor(EmitContext& ctx, IR::Inst& inst);
 void EmitRenderArea(EmitContext& ctx, IR::Inst& inst);

src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp

@@ -570,6 +570,11 @@ Id EmitSR_WScaleFactorXY(EmitContext& ctx) {
     return ctx.Const(0x00ff0000u);
 }
 
+Id EmitSR_WScaleFactorZ(EmitContext& ctx) {
+    LOG_WARNING(Shader, "(STUBBED) called");
+    return ctx.Const(0x00ff0000u);
+}
+
 Id EmitYDirection(EmitContext& ctx) {
     return ctx.Const(ctx.runtime_info.y_negate ? -1.0f : 1.0f);
 }

src/shader_recompiler/backend/spirv/emit_spirv_instructions.h

@@ -76,6 +76,7 @@ Id EmitInvocationInfo(EmitContext& ctx);
 Id EmitSampleId(EmitContext& ctx);
 Id EmitIsHelperInvocation(EmitContext& ctx);
 Id EmitSR_WScaleFactorXY(EmitContext& ctx);
+Id EmitSR_WScaleFactorZ(EmitContext& ctx);
 Id EmitYDirection(EmitContext& ctx);
 Id EmitResolutionDownFactor(EmitContext& ctx);
 Id EmitRenderArea(EmitContext& ctx);

src/shader_recompiler/frontend/ir/ir_emitter.cpp

@@ -386,6 +386,10 @@ U32 IREmitter::SR_WScaleFactorXY() {
     return Inst<U32>(Opcode::SR_WScaleFactorXY);
 }
 
+U32 IREmitter::SR_WScaleFactorZ() {
+    return Inst<U32>(Opcode::SR_WScaleFactorZ);
+}
+
 F32 IREmitter::YDirection() {
     return Inst<F32>(Opcode::YDirection);
 }

src/shader_recompiler/frontend/ir/ir_emitter.h

@@ -103,6 +103,7 @@ public:
     [[nodiscard]] U32 SampleId();
     [[nodiscard]] U1 IsHelperInvocation();
     [[nodiscard]] U32 SR_WScaleFactorXY();
+    [[nodiscard]] U32 SR_WScaleFactorZ();
     [[nodiscard]] F32 YDirection();
 
     [[nodiscard]] F32 ResolutionDownFactor();

src/shader_recompiler/frontend/ir/opcodes.inc

@@ -63,6 +63,7 @@ OPCODE(InvocationInfo,                                      U32,
 OPCODE(SampleId,                                            U32,                                                                                            )
 OPCODE(IsHelperInvocation,                                  U1,                                                                                             )
 OPCODE(SR_WScaleFactorXY,                                   U32,                                                                                            )
+OPCODE(SR_WScaleFactorZ,                                    U32,                                                                                            )
 OPCODE(YDirection,                                          F32,                                                                                            )
 OPCODE(ResolutionDownFactor,                                F32,                                                                                            )
 OPCODE(RenderArea,                                          F32x4,                                                                                          )

src/shader_recompiler/frontend/maxwell/translate/impl/move_special_register.cpp

@@ -142,7 +142,7 @@ enum class SpecialRegister : u64 {
         return ir.SR_WScaleFactorXY();
     case SpecialRegister::SR_WSCALEFACTOR_Z:
         LOG_WARNING(Shader, "(STUBBED) SR_WSCALEFACTOR_Z");
-        return ir.Imm32(Common::BitCast<u32>(1.0f));
+        return ir.SR_WScaleFactorZ();
     case SpecialRegister::SR_LANEID:
         return ir.LaneId();
     case SpecialRegister::SR_EQMASK: