Add SR_WScaleFactorXY/SR_WScaleFactorZ stubs for Prince of Persia (#5)

Pulled in and cleaned up from Sudachi

Reviewed-on: http://y2nlvhmmk5jnsvechppxnbyzmmv3vbl7dvzn6ltwcdbpgxixp3clkgqd.onion/darktux/torzu/pulls/5
Co-authored-by: darktux <darktux@y2nlvhmmk5jnsvechppxnbyzmmv3vbl7dvzn6ltwcdbpgxixp3clkgqd.onion>
Co-committed-by: darktux <darktux@y2nlvhmmk5jnsvechppxnbyzmmv3vbl7dvzn6ltwcdbpgxixp3clkgqd.onion>

src/shader_recompiler/backend/glasm/emit_glasm_context_get_set.cpp

@@ -420,6 +420,14 @@ void EmitIsHelperInvocation(EmitContext& ctx, IR::Inst& inst) {
     ctx.Add("MOV.S {}.x,fragment.helperthread.x;", inst);
 }
 
+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

@@ -72,6 +72,8 @@ void EmitInvocationId(EmitContext& ctx, IR::Inst& inst);
 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

@@ -440,6 +440,14 @@ void EmitIsHelperInvocation(EmitContext& ctx, IR::Inst& inst) {
     ctx.AddU1("{}=gl_HelperInvocation;", inst);
 }
 
+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

@@ -86,6 +86,8 @@ void EmitInvocationId(EmitContext& ctx, IR::Inst& inst);
 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

@@ -563,6 +563,16 @@ Id EmitIsHelperInvocation(EmitContext& ctx) {
     return ctx.OpLoad(ctx.U1, ctx.is_helper_invocation);
 }
 
+Id EmitSR_WScaleFactorXY(EmitContext& ctx) {
+    LOG_WARNING(Shader, "(STUBBED) called");
+    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

@@ -75,6 +75,8 @@ Id EmitInvocationId(EmitContext& ctx);
 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

@@ -382,6 +382,14 @@ U1 IREmitter::IsHelperInvocation() {
     return Inst<U1>(Opcode::IsHelperInvocation);
 }
 
+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

@@ -102,6 +102,8 @@ public:
     [[nodiscard]] U32 InvocationInfo();
     [[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

@@ -62,6 +62,8 @@ OPCODE(InvocationId,                                        U32,
 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

@@ -139,10 +139,10 @@ enum class SpecialRegister : u64 {
         return ir.WorkgroupIdZ();
     case SpecialRegister::SR_WSCALEFACTOR_XY:
         LOG_WARNING(Shader, "(STUBBED) SR_WSCALEFACTOR_XY");
-        return ir.Imm32(Common::BitCast<u32>(1.0f));
+        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: