From 2d48a7b4d0666ad16d03a22d85712617a0849046 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Sat, 9 Jan 2021 03:30:07 -0300
Subject: shader: Initial recompiler work
---
.../frontend/maxwell/instruction.h | 62 ++++++++++++++++++++++
1 file changed, 62 insertions(+)
create mode 100644 src/shader_recompiler/frontend/maxwell/instruction.h
(limited to 'src/shader_recompiler/frontend/maxwell/instruction.h')
diff --git a/src/shader_recompiler/frontend/maxwell/instruction.h b/src/shader_recompiler/frontend/maxwell/instruction.h
new file mode 100644
index 0000000000..57fd531f2b
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/instruction.h
@@ -0,0 +1,62 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/bit_field.h"
+#include "common/common_types.h"
+#include "shader_recompiler/frontend/ir/flow_test.h"
+
+namespace Shader::Maxwell {
+
+struct Predicate {
+ Predicate() = default;
+ Predicate(unsigned index_, bool negated_ = false) : index{index_}, negated{negated_} {}
+ Predicate(bool value) : index{7}, negated{!value} {}
+ Predicate(u64 raw) : index{static_cast<unsigned>(raw & 7)}, negated{(raw & 8) != 0} {}
+
+ unsigned index;
+ bool negated;
+};
+
+inline bool operator==(const Predicate& lhs, const Predicate& rhs) noexcept {
+ return lhs.index == rhs.index && lhs.negated == rhs.negated;
+}
+
+inline bool operator!=(const Predicate& lhs, const Predicate& rhs) noexcept {
+ return !(lhs == rhs);
+}
+
+union Instruction {
+ Instruction(u64 raw_) : raw{raw_} {}
+
+ u64 raw;
+
+ union {
+ BitField<5, 1, u64> is_cbuf;
+ BitField<0, 5, IR::FlowTest> flow_test;
+
+ [[nodiscard]] u32 Absolute() const noexcept {
+ return static_cast<u32>(absolute);
+ }
+
+ [[nodiscard]] s32 Offset() const noexcept {
+ return static_cast<s32>(offset);
+ }
+
+ private:
+ BitField<20, 24, s64> offset;
+ BitField<20, 32, u64> absolute;
+ } branch;
+
+ [[nodiscard]] Predicate Pred() const noexcept {
+ return Predicate{pred};
+ }
+
+private:
+ BitField<16, 4, u64> pred;
+};
+static_assert(std::is_trivially_copyable_v<Instruction>);
+
+} // namespace Shader::Maxwell
--
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