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

---
 src/shader_recompiler/frontend/maxwell/location.h | 106 ++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 src/shader_recompiler/frontend/maxwell/location.h

(limited to 'src/shader_recompiler/frontend/maxwell/location.h')

diff --git a/src/shader_recompiler/frontend/maxwell/location.h b/src/shader_recompiler/frontend/maxwell/location.h
new file mode 100644
index 000000000..66b51a19e
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/location.h
@@ -0,0 +1,106 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <compare>
+#include <iterator>
+
+#include <fmt/format.h>
+
+#include "common/common_types.h"
+#include "shader_recompiler/exception.h"
+
+namespace Shader::Maxwell {
+
+class Location {
+    static constexpr u32 VIRTUAL_OFFSET{std::numeric_limits<u32>::max()};
+
+public:
+    constexpr Location() = default;
+
+    constexpr Location(u32 initial_offset) : offset{initial_offset} {
+        if (initial_offset % 8 != 0) {
+            throw InvalidArgument("initial_offset={} is not a multiple of 8", initial_offset);
+        }
+        Align();
+    }
+
+    [[nodiscard]] constexpr u32 Offset() const noexcept {
+        return offset;
+    }
+
+    [[nodiscard]] constexpr bool IsVirtual() const {
+        return offset == VIRTUAL_OFFSET;
+    }
+
+    constexpr auto operator<=>(const Location&) const noexcept = default;
+
+    constexpr Location operator++() noexcept {
+        const Location copy{*this};
+        Step();
+        return copy;
+    }
+
+    constexpr Location operator++(int) noexcept {
+        Step();
+        return *this;
+    }
+
+    constexpr Location operator--() noexcept {
+        const Location copy{*this};
+        Back();
+        return copy;
+    }
+
+    constexpr Location operator--(int) noexcept {
+        Back();
+        return *this;
+    }
+
+    constexpr Location operator+(int number) const {
+        Location new_pc{*this};
+        while (number > 0) {
+            --number;
+            ++new_pc;
+        }
+        while (number < 0) {
+            ++number;
+            --new_pc;
+        }
+        return new_pc;
+    }
+
+    constexpr Location operator-(int number) const {
+        return operator+(-number);
+    }
+
+private:
+    constexpr void Align() {
+        offset += offset % 32 == 0 ? 8 : 0;
+    }
+
+    constexpr void Step() {
+        offset += 8 + (offset % 32 == 24 ? 8 : 0);
+    }
+
+    constexpr void Back() {
+        offset -= 8 + (offset % 32 == 8 ? 8 : 0);
+    }
+
+    u32 offset{VIRTUAL_OFFSET};
+};
+
+} // namespace Shader::Maxwell
+
+template <>
+struct fmt::formatter<Shader::Maxwell::Location> {
+    constexpr auto parse(format_parse_context& ctx) {
+        return ctx.begin();
+    }
+    template <typename FormatContext>
+    auto format(const Shader::Maxwell::Location& location, FormatContext& ctx) {
+        return fmt::format_to(ctx.out(), "{:04x}", location.Offset());
+    }
+};
-- 
cgit v1.2.3


From 9170200a11715d131645d1ffb92e86e6ef0d7e88 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Thu, 11 Feb 2021 16:39:06 -0300
Subject: shader: Initial implementation of an AST

---
 src/shader_recompiler/frontend/maxwell/location.h | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

(limited to 'src/shader_recompiler/frontend/maxwell/location.h')

diff --git a/src/shader_recompiler/frontend/maxwell/location.h b/src/shader_recompiler/frontend/maxwell/location.h
index 66b51a19e..26d29eae2 100644
--- a/src/shader_recompiler/frontend/maxwell/location.h
+++ b/src/shader_recompiler/frontend/maxwell/location.h
@@ -15,7 +15,7 @@
 namespace Shader::Maxwell {
 
 class Location {
-    static constexpr u32 VIRTUAL_OFFSET{std::numeric_limits<u32>::max()};
+    static constexpr u32 VIRTUAL_BIAS{4};
 
 public:
     constexpr Location() = default;
@@ -27,12 +27,18 @@ public:
         Align();
     }
 
+    constexpr Location Virtual() const noexcept {
+        Location virtual_location;
+        virtual_location.offset = offset - VIRTUAL_BIAS;
+        return virtual_location;
+    }
+
     [[nodiscard]] constexpr u32 Offset() const noexcept {
         return offset;
     }
 
     [[nodiscard]] constexpr bool IsVirtual() const {
-        return offset == VIRTUAL_OFFSET;
+        return offset % 8 == VIRTUAL_BIAS;
     }
 
     constexpr auto operator<=>(const Location&) const noexcept = default;
@@ -89,7 +95,7 @@ private:
         offset -= 8 + (offset % 32 == 8 ? 8 : 0);
     }
 
-    u32 offset{VIRTUAL_OFFSET};
+    u32 offset{0xcccccccc};
 };
 
 } // namespace Shader::Maxwell
-- 
cgit v1.2.3