From 072f5bb847288b1843e8731c65a01182c8726a16 Mon Sep 17 00:00:00 2001
From: CocoSimone <simococo03@gmail.com>
Date: Sun, 15 May 2022 21:35:27 +0200
Subject: [PATCH] regs

---
 src/core/gb/CMakeLists.txt      |  2 +-
 src/core/gb/Core.cpp            |  5 ++
 src/core/gb/Core.hpp            |  4 +-
 src/core/gb/Cpu.cpp             |  6 +++
 src/core/gb/Cpu.hpp             | 94 +++++++++++++++++++++++++--------
 src/frontend/sdl/CMakeLists.txt |  2 +-
 src/frontend/sdl/Frontend.hpp   |  2 +
 7 files changed, 90 insertions(+), 25 deletions(-)

diff --git a/src/core/gb/CMakeLists.txt b/src/core/gb/CMakeLists.txt
index 1a2d9426..48577f07 100644
--- a/src/core/gb/CMakeLists.txt
+++ b/src/core/gb/CMakeLists.txt
@@ -4,4 +4,4 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 add_library(gb Core.hpp Core.cpp Cpu.hpp Cpu.cpp Ppu.hpp Ppu.cpp)
-target_include_directories(gb PUBLIC . ..)
+target_include_directories(gb PUBLIC .)
diff --git a/src/core/gb/Core.cpp b/src/core/gb/Core.cpp
index e69de29b..3bf765be 100644
--- a/src/core/gb/Core.cpp
+++ b/src/core/gb/Core.cpp
@@ -0,0 +1,5 @@
+#include <Core.hpp>
+
+namespace natsukashii::core {
+Core::Core() {}
+}
\ No newline at end of file
diff --git a/src/core/gb/Core.hpp b/src/core/gb/Core.hpp
index 3512c54e..728dee25 100644
--- a/src/core/gb/Core.hpp
+++ b/src/core/gb/Core.hpp
@@ -1,6 +1,6 @@
 #pragma once
-#include <Cpu.hpp>
-#include <Ppu.hpp>
+#include "Cpu.hpp"
+#include "Ppu.hpp"
 
 namespace natsukashii::core {
 struct Core {
diff --git a/src/core/gb/Cpu.cpp b/src/core/gb/Cpu.cpp
index e69de29b..d4f4df7f 100644
--- a/src/core/gb/Cpu.cpp
+++ b/src/core/gb/Cpu.cpp
@@ -0,0 +1,6 @@
+#include <Cpu.hpp>
+
+namespace natsukashii::core {
+Cpu::Cpu() {
+}
+}
\ No newline at end of file
diff --git a/src/core/gb/Cpu.hpp b/src/core/gb/Cpu.hpp
index 435b2515..c57bc52c 100644
--- a/src/core/gb/Cpu.hpp
+++ b/src/core/gb/Cpu.hpp
@@ -1,34 +1,86 @@
 #pragma once
-#include <common.hpp>
+#include "../common.hpp"
 
 namespace natsukashii::core {
-template <class A, class B>
-struct RegisterPair {
-  A low;
-  B high;
-  auto operator=(const u16& rhs) {
-    low = rhs & 0xff;
-    high = rhs >> 8;
+#define af regs.AF
+#define bc regs.BC
+#define de regs.DE
+#define hl regs.HL
+
+#define a af.A
+#define f af.F
+#define b bc.B
+#define c bc.C
+#define d de.D
+#define e de.E
+#define h hl.H
+#define l hl.L
+
+#define REGIMPL(type1, reg1, type2, reg2) \
+  struct reg##reg1##reg2 { \
+    reg##reg1##reg2() {} \
+    union { \
+      type1 reg1; \
+      type2 reg2; \
+    }; \
+    u16 raw = 0; \
+    reg##reg1##reg2& operator=(const u16& rhs) { \
+      reg1 = rhs >> 8; \
+      reg2 = rhs & 0xff; \
+      return *this; \
+    } \
+  } reg1##reg2
+
+struct RegF {
+  RegF() : raw(0) {}
+  RegF(const u8& val) : raw(val) {}
+  u8 raw = 0;
+
+  RegF& operator=(const u8& rhs) {
+    raw |= ((rhs >> 7) << 7);
+    raw |= ((rhs >> 6) << 6);
+    raw |= ((rhs >> 5) << 5);
+    raw |= ((rhs >> 4) << 4);
+
     return *this;
   }
+
+  bool zero() { return (raw >> 7) & 1; }
+  bool negative() { return (raw >> 6) & 1; }
+  bool halfcarry() { return (raw >> 5) & 1; }
+  bool carry() { return (raw >> 4) & 1; }
+
+  void zero(const bool& rhs) {
+    raw &= ~0xF;
+    raw |= (rhs << 7);
+  }
+
+  void negative(const bool& rhs) {
+    raw &= ~0xF;
+    raw |= (rhs << 6);
+  }
+
+  void halfcarry(const bool& rhs) {
+    raw &= ~0xF;
+    raw |= (rhs << 5);
+  }
+
+  void carry(const bool& rhs) {
+    raw &= ~0xF;
+    raw |= (rhs << 4);
+  }
 };
 
-union RegF {
-  struct {
-    unsigned z:1;
-    unsigned n:1;
-    unsigned h:1;
-    unsigned c:1;
-    unsigned:4;
-  };
-  u8 raw;
+struct Registers {
+  REGIMPL(u8, A, RegF, F);
+  REGIMPL(u8, B, u8, C);
+  REGIMPL(u8, C, u8, E);
+  REGIMPL(u8, D, u8, L);
 };
 
 struct Cpu {
+  Cpu();
 private:
-  RegisterPair<u8, RegF> af;
-  RegisterPair<u8, u8> bc;
-  RegisterPair<u8, u8> de;
-  RegisterPair<u8, u8> hl;
+  Registers regs;
 };
 }
diff --git a/src/frontend/sdl/CMakeLists.txt b/src/frontend/sdl/CMakeLists.txt
index 3d0dc11a..1d2bd5a5 100644
--- a/src/frontend/sdl/CMakeLists.txt
+++ b/src/frontend/sdl/CMakeLists.txt
@@ -6,5 +6,5 @@ set(CMAKE_CXX_STANDARD_REQUIRED ON)
 find_package(SDL2 REQUIRED)
 
 add_library(frontend Frontend.cpp Frontend.hpp)
-target_include_directories(frontend PUBLIC .)
+target_include_directories(frontend PUBLIC . ../../core)
 target_link_libraries(frontend PUBLIC SDL2)
diff --git a/src/frontend/sdl/Frontend.hpp b/src/frontend/sdl/Frontend.hpp
index 76cfff20..dd9058c7 100644
--- a/src/frontend/sdl/Frontend.hpp
+++ b/src/frontend/sdl/Frontend.hpp
@@ -1,5 +1,6 @@
 #pragma once
 #include <SDL2/SDL.h>
+#include <gb/Core.hpp>
 
 namespace natsukashii::frontend {
 struct App {
@@ -11,5 +12,6 @@ private:
   SDL_Renderer *renderer = nullptr;
   Uint32 id;
   bool quit = false;
+  core::Core gb;
 };
 }