Merge pull request #6585 from ameerj/hades

Shader Decompiler Rewrite

1 files changed, 94 insertions, 0 deletions

diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_bitwise_conversion.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_bitwise_conversion.cpp
new file mode 100644
index 000000000..3c1714e89
--- /dev/null
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_bitwise_conversion.cpp
@@ -0,0 +1,94 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <string_view>
+
+#include "shader_recompiler/backend/glsl/emit_context.h"
+#include "shader_recompiler/backend/glsl/emit_glsl_instructions.h"
+#include "shader_recompiler/frontend/ir/value.h"
+
+namespace Shader::Backend::GLSL {
+namespace {
+void Alias(IR::Inst& inst, const IR::Value& value) {
+    if (value.IsImmediate()) {
+        return;
+    }
+    IR::Inst& value_inst{*value.InstRecursive()};
+    value_inst.DestructiveAddUsage(inst.UseCount());
+    value_inst.DestructiveRemoveUsage();
+    inst.SetDefinition(value_inst.Definition<Id>());
+}
+} // Anonymous namespace
+
+void EmitIdentity(EmitContext&, IR::Inst& inst, const IR::Value& value) {
+    Alias(inst, value);
+}
+
+void EmitConditionRef(EmitContext& ctx, IR::Inst& inst, const IR::Value& value) {
+    // Fake one usage to get a real variable out of the condition
+    inst.DestructiveAddUsage(1);
+    const auto ret{ctx.var_alloc.Define(inst, GlslVarType::U1)};
+    const auto input{ctx.var_alloc.Consume(value)};
+    if (ret != input) {
+        ctx.Add("{}={};", ret, input);
+    }
+}
+
+void EmitBitCastU16F16([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst) {
+    NotImplemented();
+}
+
+void EmitBitCastU32F32(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    ctx.AddU32("{}=ftou({});", inst, value);
+}
+
+void EmitBitCastU64F64(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    ctx.AddU64("{}=doubleBitsToUint64({});", inst, value);
+}
+
+void EmitBitCastF16U16([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst) {
+    NotImplemented();
+}
+
+void EmitBitCastF32U32(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    ctx.AddF32("{}=utof({});", inst, value);
+}
+
+void EmitBitCastF64U64(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    ctx.AddF64("{}=uint64BitsToDouble({});", inst, value);
+}
+
+void EmitPackUint2x32(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    ctx.AddU64("{}=packUint2x32({});", inst, value);
+}
+
+void EmitUnpackUint2x32(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    ctx.AddU32x2("{}=unpackUint2x32({});", inst, value);
+}
+
+void EmitPackFloat2x16(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    ctx.AddU32("{}=packFloat2x16({});", inst, value);
+}
+
+void EmitUnpackFloat2x16(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    ctx.AddF16x2("{}=unpackFloat2x16({});", inst, value);
+}
+
+void EmitPackHalf2x16(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    ctx.AddU32("{}=packHalf2x16({});", inst, value);
+}
+
+void EmitUnpackHalf2x16(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    ctx.AddF32x2("{}=unpackHalf2x16({});", inst, value);
+}
+
+void EmitPackDouble2x32(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    ctx.AddF64("{}=packDouble2x32({});", inst, value);
+}
+
+void EmitUnpackDouble2x32(EmitContext& ctx, IR::Inst& inst, std::string_view value) {
+    ctx.AddU32x2("{}=unpackDouble2x32({});", inst, value);
+}
+
+} // namespace Shader::Backend::GLSL