[shader_recompiler/Maxwell] ISBERD add size reads

src/shader_recompiler/CMakeLists.txt

@@ -240,6 +240,7 @@ add_library(shader_recompiler STATIC
     runtime_info.h
     shader_info.h
     varying_state.h
+    frontend/maxwell/translate/impl/internal_stage_buffer_entry_read.h
 )
 
 target_link_libraries(shader_recompiler PUBLIC common fmt::fmt sirit SPIRV-Tools-opt SPIRV-Tools SPIRV-Tools-link)

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

@@ -268,4 +268,40 @@ void TranslatorVisitor::ResetOFlag() {
     SetOFlag(ir.Imm1(false));
 }
 
+IR::U32 TranslatorVisitor::apply_ISBERD_shift(IR::U32 result, isberd::Shift shift_value) {
+    if (shift_value != isberd::Shift::Default) {
+        return ir.ShiftLeftLogical(result, ir.Imm32(1));
+    }
+    return result;
+}
+
+IR::U32 TranslatorVisitor::apply_ISBERD_size_read(IR::U32 address, isberd::SZ sz) {
+    switch (sz) {
+    case isberd::SZ::U8:
+        return ir.LoadGlobalU8(ir.UConvert(64, address));
+    case isberd::SZ::U16:
+        return ir.LoadGlobalU16(ir.UConvert(64, address));
+    case isberd::SZ::U32:
+    case isberd::SZ::F32:
+        return ir.LoadGlobal32(ir.UConvert(64, address));
+    default:
+        UNREACHABLE();
+    }
+}
+
+IR::U32 TranslatorVisitor::compute_ISBERD_address(IR::Reg src_reg, u32 src_reg_num, u32 imm, u64 skew_value) {
+    IR::U32 address{};
+    if (src_reg_num == 0xFF) {
+        address = ir.Imm32(imm);
+    } else {
+        auto offset = ir.Imm32(imm);
+        address = ir.IAdd(X(src_reg), offset);
+        if (skew_value != 0) {
+            address = ir.IAdd(address, ir.LaneId());
+        }
+    }
+
+    return address;
+};
+
 } // namespace Shader::Maxwell

src/shader_recompiler/frontend/maxwell/translate/impl/impl.h

@@ -7,6 +7,7 @@
 #include "shader_recompiler/frontend/ir/basic_block.h"
 #include "shader_recompiler/frontend/ir/ir_emitter.h"
 #include "shader_recompiler/frontend/maxwell/instruction.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/internal_stage_buffer_entry_read.h"
 
 namespace Shader::Maxwell {
 
@@ -381,6 +382,11 @@ public:
     void ResetSFlag();
     void ResetCFlag();
     void ResetOFlag();
+
+    // Helper functions for various translator visitors
+    IR::U32 apply_ISBERD_shift(IR::U32 result, isberd::Shift shift_value);
+    IR::U32 apply_ISBERD_size_read(IR::U32 address, isberd::SZ sz_value);
+    IR::U32 compute_ISBERD_address(IR::Reg src_reg, u32 src_reg_num, u32 imm, u64 skew_value);
 };
 
 } // namespace Shader::Maxwell

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

@@ -7,23 +7,9 @@
 #include "common/bit_field.h"
 #include "common/common_types.h"
 #include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
+#include "shader_recompiler/frontend/maxwell/translate/impl/internal_stage_buffer_entry_read.h"
 
 namespace Shader::Maxwell {
-namespace {
-enum class Mode : u64 {
-    Default,
-    Patch,
-    Prim,
-    Attr,
-};
-
-enum class Shift : u64 {
-    Default,
-    U16,
-    B32,
-};
-
-} // Anonymous namespace
 
 // Valid only for GS, TI, VS and trap
 void TranslatorVisitor::ISBERD(u64 insn) {
@@ -35,70 +21,49 @@ void TranslatorVisitor::ISBERD(u64 insn) {
         BitField<24, 8, u32> imm;
         BitField<31, 1, u64> skew;
         BitField<32, 1, u64> o;
-        BitField<33, 2, Mode> mode;
-        BitField<47, 2, Shift> shift;
+        BitField<33, 2, isberd::Mode> mode;
+        BitField<36, 4, isberd::SZ> sz;
+        BitField<47, 2, isberd::Shift> shift;
     } const isberd{insn};
 
-    if (isberd.skew != 0) {
-        IR::U32 current_lane_id{ir.LaneId()};
-        IR::U32 result{ir.IAdd(X(isberd.src_reg), current_lane_id)};
-        X(isberd.dest_reg, result);
-    }
+    auto address = compute_ISBERD_address(isberd.src_reg, isberd.src_reg_num, isberd.imm, isberd.skew);
     if (isberd.o != 0) {
-        IR::U32 address{};
-        IR::F32 result{};
-        if (isberd.src_reg_num == 0xFF) {
-            address = ir.Imm32(isberd.imm);
-            result = ir.GetAttributeIndexed(address);
-        } else {
-            IR::U32 offset = ir.Imm32(isberd.imm);
-            address = ir.IAdd(X(isberd.src_reg), offset);
-            result = ir.GetAttributeIndexed(address);
-        }
-        X(isberd.dest_reg, ir.BitCast<IR::U32>(result));
-    }
-    if (isberd.mode != Mode::Default) {
-        IR::F32 result{};
-        IR::U32 index{};
-        if (isberd.src_reg_num == 0xFF) {
-            index = ir.Imm32(isberd.imm);
-        } else {
-            index = ir.IAdd(X(isberd.src_reg), ir.Imm32(isberd.imm));
+        auto result = apply_ISBERD_size_read(address, isberd.sz.Value());
+        X(isberd.dest_reg, apply_ISBERD_shift(result, isberd.shift.Value()));
+
+        return;
     }
 
-        switch (static_cast<u64>(isberd.mode.Value())) {
-        case static_cast<u64>(Mode::Patch):
-            result = ir.GetPatch(index.Patch());
+    if (isberd.mode != isberd::Mode::Default) {
+        IR::F32 result_f32{};
+        switch (isberd.mode.Value()) {
+        case isberd::Mode::Patch:
+            result_f32 = ir.GetPatch(address.Patch());
             break;
-        case static_cast<u64>(Mode::Prim):
-            result = ir.GetAttribute(index.Attribute());
+        case isberd::Mode::Prim:
+            result_f32 = ir.GetAttribute(address.Attribute());
             break;
-        case static_cast<u64>(Mode::Attr):
-            result = ir.GetAttributeIndexed(index);
+        case isberd::Mode::Attr:
+            result_f32 = ir.GetAttributeIndexed(address);
             break;
+        default:
+            UNREACHABLE();
         }
-        X(isberd.dest_reg, ir.BitCast<IR::U32>(result));
-    }
-    if (isberd.shift != Shift::Default) {
-        IR::U32 result{};
-        switch (static_cast<u64>(isberd.shift.Value())) {
-        case static_cast<u64>(Shift::U16):
-            result = ir.ShiftLeftLogical(result, static_cast<IR::U32>(ir.Imm16(1)));
-            break;
-        case static_cast<u64>(Shift::B32):
-            result = ir.ShiftLeftLogical(result, ir.Imm32(1));
-            break;
+
+        auto result_u32 = ir.BitCast<IR::U32>(result_f32);
+        X(isberd.dest_reg, apply_ISBERD_shift(result_u32, isberd.shift.Value()));
+        return;
     }
+
+    if (isberd.skew != 0) {
+        auto result = ir.IAdd(X(isberd.src_reg), ir.LaneId());
         X(isberd.dest_reg, result);
+
+        return;
     }
-    //LOG_DEBUG(Shader, "(STUBBED) called {}", insn);
-    if (isberd.src_reg_num == 0xFF) {
-        IR::U32 src_imm{ir.Imm32(static_cast<u32>(isberd.imm))};
-        IR::U32 result{ir.IAdd(X(isberd.src_reg), src_imm)};
-        X(isberd.dest_reg, result);
-    } else {
+
+    // Fallback if nothing else applies
     X(isberd.dest_reg, X(isberd.src_reg));
 }
-}
 
 } // namespace Shader::Maxwell

src/shader_recompiler/frontend/maxwell/translate/impl/internal_stage_buffer_entry_read.h

@@ -0,0 +1,34 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+#include "shader_recompiler/environment.h"
+#include "shader_recompiler/frontend/ir/basic_block.h"
+#include "shader_recompiler/frontend/ir/ir_emitter.h"
+#include "shader_recompiler/frontend/maxwell/instruction.h"
+
+namespace Shader::Maxwell {
+namespace isberd {
+enum class Mode : u64 {
+    Default,
+    Patch,
+    Prim,
+    Attr,
+};
+
+enum class Shift : u64 {
+    Default,
+    U16,
+    B32,
+};
+
+enum class SZ : u64 {
+    U8,
+    U16,
+    U32,
+    F32,
+};
+
+} // Anonymous namespace
+
+} // namespace Shader::Maxwell

src/video_core/CMakeLists.txt

@@ -1,5 +1,5 @@
-# SPDX-FileCopyrightText: 2018 yuzu Emulator Project
-# SPDX-License-Identifier: GPL-2.0-or-later
+# SPDX-FileCopyrightText: 2018 yuzu Emulator Project SPDX-License-Identifier:
+# GPL-2.0-or-later
 
 add_subdirectory(host_shaders)
 
@@ -9,7 +9,8 @@ if(LIBVA_FOUND)
   list(APPEND FFmpeg_LIBRARIES ${LIBVA_LIBRARIES})
 endif()
 
-add_library(video_core STATIC
+add_library(
+  video_core STATIC
   buffer_cache/buffer_base.h
   buffer_cache/buffer_cache_base.h
   buffer_cache/buffer_cache.cpp
@@ -312,8 +313,7 @@ add_library(video_core STATIC
   vulkan_common/nsight_aftermath_tracker.h
   vulkan_common/vma.cpp
   vulkan_common/vma.h
-    vulkan_common/vulkan.h
-)
+  vulkan_common/vulkan.h)
 
 target_link_libraries(video_core PUBLIC common core)
 target_link_libraries(video_core PUBLIC glad shader_recompiler stb bc_decoder)
@@ -333,38 +333,52 @@ target_link_libraries(video_core PRIVATE sirit Vulkan::Headers Vulkan::UtilityHe
 
 if(ENABLE_NSIGHT_AFTERMATH)
   if(NOT DEFINED ENV{NSIGHT_AFTERMATH_SDK})
-        message(FATAL_ERROR "Environment variable NSIGHT_AFTERMATH_SDK has to be provided")
+    message(
+      FATAL_ERROR "Environment variable NSIGHT_AFTERMATH_SDK has to be provided"
+    )
   endif()
   if(NOT WIN32)
-        message(FATAL_ERROR "Nsight Aftermath doesn't support non-Windows platforms")
+    message(
+      FATAL_ERROR "Nsight Aftermath doesn't support non-Windows platforms")
   endif()
   target_compile_definitions(video_core PRIVATE HAS_NSIGHT_AFTERMATH)
-    target_include_directories(video_core PRIVATE "$ENV{NSIGHT_AFTERMATH_SDK}/include")
+  target_include_directories(video_core
+                             PRIVATE "$ENV{NSIGHT_AFTERMATH_SDK}/include")
 endif()
 
 if(MSVC)
-    target_compile_options(video_core PRIVATE
-        /we4242 # 'identifier': conversion from 'type1' to 'type2', possible loss of data
-        /we4244 # 'conversion': conversion from 'type1' to 'type2', possible loss of data
+  target_compile_options(
+    video_core
+    PRIVATE /we4242 # 'identifier': conversion from 'type1' to 'type2', possible
+                    # loss of data
+            /we4244 # 'conversion': conversion from 'type1' to 'type2', possible
+                    # loss of data
   )
 else()
   if(APPLE)
-        # error: declaration shadows a typedef in 'interval_base_set<SubType, DomainT, Compare, Interval, Alloc>'
-        # error: implicit conversion loses integer precision: 'int' to 'boost::icl::bound_type' (aka 'unsigned char')
-        target_compile_options(video_core PRIVATE -Wno-shadow -Wno-unused-local-typedef)
+    # error: declaration shadows a typedef in 'interval_base_set<SubType,
+    # DomainT, Compare, Interval, Alloc>' error: implicit conversion loses
+    # integer precision: 'int' to 'boost::icl::bound_type' (aka 'unsigned char')
+    target_compile_options(video_core PRIVATE -Wno-shadow
+                                              -Wno-unused-local-typedef)
   else()
     target_compile_options(video_core PRIVATE -Werror=conversion)
   endif()
 
-    target_compile_options(video_core PRIVATE
-        -Wno-sign-conversion
-    )
+  target_compile_options(video_core PRIVATE -Wno-sign-conversion)
 
   # xbyak
-    set_source_files_properties(macro/macro_jit_x64.cpp PROPERTIES COMPILE_OPTIONS "-Wno-conversion;-Wno-shadow")
+  set_source_files_properties(
+    macro/macro_jit_x64.cpp PROPERTIES COMPILE_OPTIONS
+                                       "-Wno-conversion;-Wno-shadow")
 
   # VMA
-    set_source_files_properties(vulkan_common/vma.cpp PROPERTIES COMPILE_OPTIONS "-Wno-conversion;-Wno-unused-variable;-Wno-unused-parameter;-Wno-missing-field-initializers")
+  set_source_files_properties(
+    vulkan_common/vma.cpp
+    PROPERTIES
+      COMPILE_OPTIONS
+      "-Wno-conversion;-Wno-unused-variable;-Wno-unused-parameter;-Wno-missing-field-initializers"
+  )
 
   # Get around GCC failing with intrinsics in Debug
   if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_BUILD_TYPE MATCHES "Debug")
@@ -373,10 +387,8 @@ else()
 endif()
 
 if(ARCHITECTURE_x86_64)
-    target_sources(video_core PRIVATE
-        macro/macro_jit_x64.cpp
-        macro/macro_jit_x64.h
-    )
+  target_sources(video_core PRIVATE macro/macro_jit_x64.cpp
+                                    macro/macro_jit_x64.h)
   target_link_libraries(video_core PUBLIC xbyak::xbyak)
 
   if(NOT MSVC)