From c5733869e6ed82a88c933393b42eb40b7d7bbb1e Mon Sep 17 00:00:00 2001
From: Simone Coco <simone.coco@alientech.to>
Date: Tue, 23 Dec 2025 17:08:49 +0100
Subject: [PATCH] start working on x64 emitter

---
 CMakeLists.txt              |  6 +++---
 src/backend/x64/emitter.cpp |  7 +++++++
 src/backend/x64/emitter.hpp | 14 ++++++++++++++
 3 files changed, 24 insertions(+), 3 deletions(-)
 create mode 100644 src/backend/x64/emitter.cpp
 create mode 100644 src/backend/x64/emitter.hpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1dae0fc..5a59ec1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.23)
 project(rc64 CXX)
 
-
-add_library(rc64 )
-target_include_directories(rc64 PUBLIC src/misc)
\ No newline at end of file
+add_library(rc64 src/backend/x64/emitter.cpp)
+target_include_directories(rc64 PUBLIC src/backend/x64 src/misc external/xbyak)
+set_target_properties(rc64 PROPERTIES CXX_STANDARD 23 CXX_STANDARD_REQUIRED ON)
\ No newline at end of file
diff --git a/src/backend/x64/emitter.cpp b/src/backend/x64/emitter.cpp
new file mode 100644
index 0000000..573ff9a
--- /dev/null
+++ b/src/backend/x64/emitter.cpp
@@ -0,0 +1,7 @@
+#include <emitter.hpp>
+
+namespace rc64 {
+Emitter::Emitter() : Xbyak::CodeGenerator(kMaxCodeCacheSize, Xbyak::AutoGrow) {
+
+}
+}
\ No newline at end of file
diff --git a/src/backend/x64/emitter.hpp b/src/backend/x64/emitter.hpp
new file mode 100644
index 0000000..d29a249
--- /dev/null
+++ b/src/backend/x64/emitter.hpp
@@ -0,0 +1,14 @@
+#pragma once
+#include <xbyak/xbyak.h>
+#include <util.hpp>
+#include <type.hpp>
+
+namespace rc64 {
+struct Emitter : Xbyak::CodeGenerator {
+    Emitter();
+
+    static constexpr size_t kMaxTableSize = 1 << 12;
+    static constexpr size_t kMaxPagesPerTable = 1 << 20;
+    static constexpr size_t kMaxCodeCacheSize = kMaxTableSize * kMaxPagesPerTable;
+};
+}
\ No newline at end of file