[shader_recompiler] add 'legacy descriptor indices' toggle for tomodachi

Signed-off-by: lizzie <lizzie@eden-emu.dev>

src/common/settings.h

@@ -591,6 +591,8 @@ struct Values {
     SwitchableSetting<bool> gpu_unswizzle_enabled{linkage, false, "gpu_unswizzle_enabled",
                                                   Category::RendererHacks};
 
+    SwitchableSetting<bool> legacy_descriptor_indices{linkage, true, "legacy_descriptor_indices", Category::RendererHacks};
+
     SwitchableSetting<ExtendedDynamicState> dyna_state{linkage,
 #if defined(ANDROID)
                                            ExtendedDynamicState::Disabled,

src/shader_recompiler/backend/spirv/emit_spirv_image.cpp

@@ -221,12 +221,17 @@ private:
 Id Texture(EmitContext& ctx, IR::TextureInstInfo info, [[maybe_unused]] const IR::Value& index) {
     const TextureDefinition& def{ctx.textures.at(info.descriptor_index)};
     if (def.count > 1) {
-        const DescriptorIndex idx{ctx, index};
-        const Id pointer{ctx.OpAccessChain(def.pointer_type, def.id, idx.Value())};
-        idx.Decorate(ctx, pointer);
-        const Id object{ctx.OpLoad(def.sampled_type, pointer)};
-        idx.Decorate(ctx, object);
-        return object;
+        if (Settings::values.legacy_descriptor_indices.GetValue()) {
+            const Id pointer{ctx.OpAccessChain(def.pointer_type, def.id, ctx.Def(index))};
+            return ctx.OpLoad(def.sampled_type, pointer);
+        } else {
+            const DescriptorIndex idx{ctx, index};
+            const Id pointer{ctx.OpAccessChain(def.pointer_type, def.id, idx.Value())};
+            idx.Decorate(ctx, pointer);
+            const Id object{ctx.OpLoad(def.sampled_type, pointer)};
+            idx.Decorate(ctx, object);
+            return object;
+        }
     } else {
         return ctx.OpLoad(def.sampled_type, def.id);
     }
@@ -244,14 +249,20 @@ Id TextureImage(EmitContext& ctx, IR::TextureInstInfo info, const IR::Value& ind
     } else {
         const TextureDefinition& def{ctx.textures.at(info.descriptor_index)};
         if (def.count > 1) {
-            const DescriptorIndex idx{ctx, index};
-            const Id ptr{ctx.OpAccessChain(def.pointer_type, def.id, idx.Value())};
-            idx.Decorate(ctx, ptr);
-            const Id object{ctx.OpLoad(def.sampled_type, ptr)};
-            idx.Decorate(ctx, object);
-            const Id image{ctx.OpImage(def.image_type, object)};
-            idx.Decorate(ctx, image);
-            return image;
+            if (Settings::values.legacy_descriptor_indices.GetValue()) {
+                const Id idx{index.IsImmediate() ? ctx.Const(index.U32()) : ctx.Def(index)};
+                const Id ptr{ctx.OpAccessChain(def.pointer_type, def.id, idx)};
+                return ctx.OpImage(def.image_type, ctx.OpLoad(def.sampled_type, ptr));
+            } else {
+                const DescriptorIndex idx{ctx, index};
+                const Id ptr{ctx.OpAccessChain(def.pointer_type, def.id, idx.Value())};
+                idx.Decorate(ctx, ptr);
+                const Id object{ctx.OpLoad(def.sampled_type, ptr)};
+                idx.Decorate(ctx, object);
+                const Id image{ctx.OpImage(def.image_type, object)};
+                idx.Decorate(ctx, image);
+                return image;
+            }
         }
         return ctx.OpImage(def.image_type, ctx.OpLoad(def.sampled_type, def.id));
     }

src/shader_recompiler/ir_opt/texture_pass.cpp

@@ -12,6 +12,7 @@
 #include <limits>
 #include <boost/container/small_vector.hpp>
 
+#include "common/settings.h"
 #include "shader_recompiler/environment.h"
 #include "shader_recompiler/frontend/ir/basic_block.h"
 #include "shader_recompiler/frontend/ir/breadth_first_search.h"
@@ -461,7 +462,7 @@ std::optional<ConstBufferAddr> TryGetConstBuffer(const IR::Inst* inst, Environme
         .secondary_offset = 0,
         .secondary_shift_left = 0,
         .dynamic_offset = dynamic_offset,
-        .count = DynamicDescriptorCount(base_offset, size_shift),
+        .count = Settings::values.legacy_descriptor_indices.GetValue() ? 8 : DynamicDescriptorCount(base_offset, size_shift),
         .has_secondary = false,
     };
 }
@@ -733,9 +734,10 @@ void TexturePass(Environment& env, IR::Program& program, const HostTranslateInfo
             break;
         }
         u32 index;
-        const u32 size_shift{cbuf.count > 1 ? DynamicDescriptorSizeShift(cbuf.dynamic_offset)
-                                            : DESCRIPTOR_SIZE_SHIFT};
-        u32 count{cbuf.count};
+        u32 size_shift = cbuf.count > 1 ? DynamicDescriptorSizeShift(cbuf.dynamic_offset) : DESCRIPTOR_SIZE_SHIFT;
+        if (Settings::values.legacy_descriptor_indices.GetValue())
+            size_shift = DESCRIPTOR_SIZE_SHIFT;
+        u32 count = cbuf.count;
         switch (inst->GetOpcode()) {
         case IR::Opcode::ImageRead:
         case IR::Opcode::ImageAtomicIAdd32:
@@ -821,8 +823,7 @@ void TexturePass(Environment& env, IR::Program& program, const HostTranslateInfo
             const auto insert_point{IR::Block::InstructionList::s_iterator_to(*inst)};
             IR::IREmitter ir{*texture_inst.block, insert_point};
             const IR::U32 shift{ir.Imm32(size_shift)};
-            inst->SetArg(0, ir.UMin(ir.ShiftRightLogical(cbuf.dynamic_offset, shift),
-                        ir.Imm32(count - 1)));
+            inst->SetArg(0, ir.UMin(ir.ShiftRightLogical(cbuf.dynamic_offset, shift), ir.Imm32(count - 1)));
         } else {
             inst->SetArg(0, IR::Value{});
         }