From cbbca26d182991abf68d9b2e1b1e5935bf4eb476 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Wed, 16 Jun 2021 03:03:08 -0300
Subject: shader: Add support for native 16-bit floats

---
 src/shader_recompiler/CMakeLists.txt                   |  1 +
 .../frontend/maxwell/translate_program.cpp             |  8 +++++---
 .../frontend/maxwell/translate_program.h               |  3 ++-
 src/shader_recompiler/host_translate_info.h            | 18 ++++++++++++++++++
 4 files changed, 26 insertions(+), 4 deletions(-)
 create mode 100644 src/shader_recompiler/host_translate_info.h

(limited to 'src/shader_recompiler')

diff --git a/src/shader_recompiler/CMakeLists.txt b/src/shader_recompiler/CMakeLists.txt
index f801a9f72..164e94071 100644
--- a/src/shader_recompiler/CMakeLists.txt
+++ b/src/shader_recompiler/CMakeLists.txt
@@ -211,6 +211,7 @@ add_library(shader_recompiler STATIC
     frontend/maxwell/translate/translate.h
     frontend/maxwell/translate_program.cpp
     frontend/maxwell/translate_program.h
+    host_translate_info.h
     ir_opt/collect_shader_info_pass.cpp
     ir_opt/constant_propagation_pass.cpp
     ir_opt/dead_code_elimination_pass.cpp
diff --git a/src/shader_recompiler/frontend/maxwell/translate_program.cpp b/src/shader_recompiler/frontend/maxwell/translate_program.cpp
index e52170e3e..5250509c1 100644
--- a/src/shader_recompiler/frontend/maxwell/translate_program.cpp
+++ b/src/shader_recompiler/frontend/maxwell/translate_program.cpp
@@ -13,6 +13,7 @@
 #include "shader_recompiler/frontend/maxwell/structured_control_flow.h"
 #include "shader_recompiler/frontend/maxwell/translate/translate.h"
 #include "shader_recompiler/frontend/maxwell/translate_program.h"
+#include "shader_recompiler/host_translate_info.h"
 #include "shader_recompiler/ir_opt/passes.h"
 
 namespace Shader::Maxwell {
@@ -120,7 +121,7 @@ void AddNVNStorageBuffers(IR::Program& program) {
 } // Anonymous namespace
 
 IR::Program TranslateProgram(ObjectPool<IR::Inst>& inst_pool, ObjectPool<IR::Block>& block_pool,
-                             Environment& env, Flow::CFG& cfg) {
+                             Environment& env, Flow::CFG& cfg, const HostTranslateInfo& host_info) {
     IR::Program program;
     program.syntax_list = BuildASL(inst_pool, block_pool, env, cfg);
     program.blocks = GenerateBlocks(program.syntax_list);
@@ -150,8 +151,9 @@ IR::Program TranslateProgram(ObjectPool<IR::Inst>& inst_pool, ObjectPool<IR::Blo
     RemoveUnreachableBlocks(program);
 
     // Replace instructions before the SSA rewrite
-    Optimization::LowerFp16ToFp32(program);
-
+    if (!host_info.support_float16) {
+        Optimization::LowerFp16ToFp32(program);
+    }
     Optimization::SsaRewritePass(program);
 
     Optimization::GlobalMemoryToStorageBufferPass(program);
diff --git a/src/shader_recompiler/frontend/maxwell/translate_program.h b/src/shader_recompiler/frontend/maxwell/translate_program.h
index 1e5536443..a84814811 100644
--- a/src/shader_recompiler/frontend/maxwell/translate_program.h
+++ b/src/shader_recompiler/frontend/maxwell/translate_program.h
@@ -8,13 +8,14 @@
 #include "shader_recompiler/frontend/ir/basic_block.h"
 #include "shader_recompiler/frontend/ir/program.h"
 #include "shader_recompiler/frontend/maxwell/control_flow.h"
+#include "shader_recompiler/host_translate_info.h"
 #include "shader_recompiler/object_pool.h"
 
 namespace Shader::Maxwell {
 
 [[nodiscard]] IR::Program TranslateProgram(ObjectPool<IR::Inst>& inst_pool,
                                            ObjectPool<IR::Block>& block_pool, Environment& env,
-                                           Flow::CFG& cfg);
+                                           Flow::CFG& cfg, const HostTranslateInfo& host_info);
 
 [[nodiscard]] IR::Program MergeDualVertexPrograms(IR::Program& vertex_a, IR::Program& vertex_b,
                                                   Environment& env_vertex_b);
diff --git a/src/shader_recompiler/host_translate_info.h b/src/shader_recompiler/host_translate_info.h
new file mode 100644
index 000000000..94a584219
--- /dev/null
+++ b/src/shader_recompiler/host_translate_info.h
@@ -0,0 +1,18 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+namespace Shader {
+
+// Try to keep entries here to a minimum
+// They can accidentally change the cached information in a shader
+
+/// Misc information about the host
+struct HostTranslateInfo {
+    bool support_float16{}; ///< True when the device supports 16-bit floats
+    bool support_int64{};   ///< True when the device supports 64-bit integers
+};
+
+} // namespace Shader
-- 
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