1 files changed, 41 insertions, 0 deletions
diff --git a/include/CompilerKit/Detail/Aarch64.h b/include/CompilerKit/Detail/Aarch64.h
new file mode 100644
index 0000000..1ce1719
--- /dev/null
+++ b/include/CompilerKit/Detail/Aarch64.h
@@ -0,0 +1,41 @@
+/* ========================================
+
+Copyright (C) 2024-2025 Amlal El Mahrouss, Licensed under the Apache 2.0 license
+
+======================================== */
+
+#pragma once
+
+#include <CompilerKit/Detail/Config.h>
+#include <stdint.h>
+
+/// @brief ARM64 encoding support.
+/// @file Detail/Aarch64.h
+
+struct CpuOpcodeArm64;
+
+/// @brief ARM64 opcode header.
+struct PACKED CpuOpcodeArm64_Data final {
+  uint32_t fOpcode : 10;  // Bits 31–22: Opcode for operation
+  uint32_t fRm : 5;       // Bits 21–16: Source register Rm
+  uint32_t fShamt : 6;    // Bits 15–10: Shift amount
+  uint32_t fRn : 5;       // Bits 9–5: Source register Rn
+  uint32_t fRd : 5;       // Bits 4–0: Destination register Rd
+};
+
+typedef struct {
+  uint32_t opcode : 6;   // Bits 31–26: Branch opcode
+  int32_t  offset : 26;  // Bits 25–0: Signed offset (branch target)
+} PACKED CpuOpcodeArm64_Branch;
+
+typedef struct {
+  uint32_t size : 2;     // Bits 31–30: Size of the data
+  uint32_t opcode : 7;   // Bits 29–23: Opcode for load/store
+  uint32_t offset : 12;  // Bits 22–10: Offset
+  uint32_t rn : 5;       // Bits 9–5: Base address register Rn
+  uint32_t rt : 5;       // Bits 4–0: Target/source register Rt
+} PACKED CpuOpcodeArm64_LoadStore;
+
+#define kAsmRegisterLimit (30)
+#define kAsmRegisterPrefix "x"
+#define kOpcodeARM64Count (1000)