1 files changed, 44 insertions, 0 deletions
diff --git a/dev/LibCompiler/Backend/arm64.h b/dev/LibCompiler/Backend/arm64.h
new file mode 100644
index 0000000..08096ee
--- /dev/null
+++ b/dev/LibCompiler/Backend/arm64.h
@@ -0,0 +1,44 @@
+/* -------------------------------------------
+
+Copyright (C) 2024-2025 Amlal EL Mahrous, all rights reserved
+
+------------------------------------------- */
+
+#pragma once
+
+#include <stdint.h>
+#include <LibCompiler/Defines.h>
+
+/// @brief ARM64 encoding support.
+/// @file Backend/arm64.hpp
+
+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)