From c15332c44fa50dc44e2ebd1a682048f1e30dc136 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Sun, 25 Jul 2021 22:04:53 -0300
Subject: shader: Add IsTextureScaled opcode

---
 src/shader_recompiler/backend/glasm/emit_glasm_image.cpp      | 8 ++++++++
 src/shader_recompiler/backend/glasm/emit_glasm_instructions.h | 1 +
 src/shader_recompiler/backend/glsl/emit_glsl_image.cpp        | 8 ++++++++
 src/shader_recompiler/backend/glsl/emit_glsl_instructions.h   | 2 ++
 src/shader_recompiler/backend/spirv/emit_spirv_image.cpp      | 4 ++++
 src/shader_recompiler/backend/spirv/emit_spirv_instructions.h | 1 +
 6 files changed, 24 insertions(+)

(limited to 'src/shader_recompiler/backend')

diff --git a/src/shader_recompiler/backend/glasm/emit_glasm_image.cpp b/src/shader_recompiler/backend/glasm/emit_glasm_image.cpp
index 09e3a9b82..583ed3cf2 100644
--- a/src/shader_recompiler/backend/glasm/emit_glasm_image.cpp
+++ b/src/shader_recompiler/backend/glasm/emit_glasm_image.cpp
@@ -608,6 +608,14 @@ void EmitImageWrite(EmitContext& ctx, IR::Inst& inst, const IR::Value& index, Re
     ctx.Add("STOREIM.{} {},{},{},{};", format, image, color, coord, type);
 }
 
+void EmitIsTextureScaled(EmitContext& ctx, IR::Inst& inst, const IR::Value& index) {
+    if (!index.IsImmediate()) {
+        throw NotImplementedException("Non-constant texture rescaling");
+    }
+    UNIMPLEMENTED();
+    ctx.Add("MOV.S {}.x,-1;", inst);
+}
+
 void EmitImageAtomicIAdd32(EmitContext& ctx, IR::Inst& inst, const IR::Value& index, Register coord,
                            ScalarU32 value) {
     ImageAtomic(ctx, inst, index, coord, value, "ADD.U32");
diff --git a/src/shader_recompiler/backend/glasm/emit_glasm_instructions.h b/src/shader_recompiler/backend/glasm/emit_glasm_instructions.h
index 4f8dd8e42..e2b7d601d 100644
--- a/src/shader_recompiler/backend/glasm/emit_glasm_instructions.h
+++ b/src/shader_recompiler/backend/glasm/emit_glasm_instructions.h
@@ -556,6 +556,7 @@ void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
 void EmitImageRead(EmitContext& ctx, IR::Inst& inst, const IR::Value& index, Register coord);
 void EmitImageWrite(EmitContext& ctx, IR::Inst& inst, const IR::Value& index, Register coord,
                     Register color);
+void EmitIsTextureScaled(EmitContext& ctx, IR::Inst& inst, const IR::Value& index);
 void EmitBindlessImageAtomicIAdd32(EmitContext&);
 void EmitBindlessImageAtomicSMin32(EmitContext&);
 void EmitBindlessImageAtomicUMin32(EmitContext&);
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
index 447eb8e0a..099e0160b 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
@@ -612,6 +612,14 @@ void EmitImageAtomicExchange32(EmitContext& ctx, IR::Inst& inst, const IR::Value
                value);
 }
 
+void EmitIsTextureScaled(EmitContext& ctx, IR::Inst& inst, const IR::Value& index) {
+    if (!index.IsImmediate()) {
+        throw NotImplementedException("Non-constant texture rescaling");
+    }
+    UNIMPLEMENTED();
+    ctx.AddU1("{}=true;", inst);
+}
+
 void EmitBindlessImageSampleImplicitLod(EmitContext&) {
     NotImplemented();
 }
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h b/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
index 159e4b770..f86502e4c 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_instructions.h
@@ -630,6 +630,8 @@ void EmitImageRead(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
                    std::string_view coords);
 void EmitImageWrite(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
                     std::string_view coords, std::string_view color);
+void EmitIsTextureScaled(EmitContext& ctx, IR::Inst& inst, const IR::Value& index);
+void EmitIsImageScaled(EmitContext& ctx, IR::Inst& inst, const IR::Value& index);
 void EmitBindlessImageAtomicIAdd32(EmitContext&);
 void EmitBindlessImageAtomicSMin32(EmitContext&);
 void EmitBindlessImageAtomicUMin32(EmitContext&);
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_image.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_image.cpp
index 1d5364309..2f925cc3e 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_image.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_image.cpp
@@ -470,4 +470,8 @@ void EmitImageWrite(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, Id
     ctx.OpImageWrite(Image(ctx, index, info), coords, color);
 }
 
+Id EmitIsTextureScaled([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] const IR::Value& index) {
+    return ctx.false_value;
+}
+
 } // namespace Shader::Backend::SPIRV
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_instructions.h b/src/shader_recompiler/backend/spirv/emit_spirv_instructions.h
index 44eda16ca..69fc18f5f 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_instructions.h
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_instructions.h
@@ -513,6 +513,7 @@ Id EmitImageGradient(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, I
                      Id derivates, Id offset, Id lod_clamp);
 Id EmitImageRead(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, Id coords);
 void EmitImageWrite(EmitContext& ctx, IR::Inst* inst, const IR::Value& index, Id coords, Id color);
+Id EmitIsTextureScaled(EmitContext& ctx, const IR::Value& index);
 Id EmitBindlessImageAtomicIAdd32(EmitContext&);
 Id EmitBindlessImageAtomicSMin32(EmitContext&);
 Id EmitBindlessImageAtomicUMin32(EmitContext&);
-- 
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