dev, general: codebase needed refactors and tweaks, for NeKernel's 0.0.2 release.

	details:

		- things needed to be cleared off, short sighted decisions fixed.
		- the inconsistency of certain files have been fixed too.

Signed-off-by: Amlal <amlal@nekernel.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/dev/LibCompiler/Backend/Amd64.h b/dev/LibCompiler/Backend/Amd64.h
new file mode 100644
index 0000000..a3fb8a2
--- /dev/null
+++ b/dev/LibCompiler/Backend/Amd64.h
@@ -0,0 +1,48 @@
+/* -------------------------------------------
+
+  Copyright (C) 2024-2025 Amlal EL Mahrous, all rights reserved
+
+------------------------------------------- */
+
+#pragma once
+
+#include <LibCompiler/Defines.h>
+
+// @brief AMD64 support.
+// @file Backend/Amd64.h
+
+#define kAsmOpcodeDecl(__NAME, __OPCODE) {.fName = __NAME, .fOpcode = __OPCODE},
+
+typedef char     i64_character_t;
+typedef uint8_t  i64_byte_t;
+typedef uint16_t i64_hword_t;
+typedef uint32_t i64_word_t;
+
+#define kAsmRegisterPrefix "r"
+
+struct CpuOpcodeAMD64 {
+  std::string fName;
+  i64_byte_t  fPrefixBytes[4];
+  i64_hword_t fOpcode;
+  i64_hword_t fModReg;
+  i64_word_t  fDisplacment;
+  i64_word_t  fImmediate;
+};
+
+/// these two are edge cases
+#define kAsmIntOpcode 0xCC
+#define kasmIntOpcodeAlt 0xCD
+
+#define kAsmJumpOpcode 0x0F80
+#define kJumpLimit 30
+#define kJumpLimitStandard 0xE3
+#define kJumpLimitStandardLimit 0xEB
+
+inline std::vector<CpuOpcodeAMD64> kOpcodesAMD64 = {
+    kAsmOpcodeDecl("int", 0xCD) kAsmOpcodeDecl("into", 0xCE) kAsmOpcodeDecl("intd", 0xF1)
+        kAsmOpcodeDecl("int3", 0xC3) kAsmOpcodeDecl("iret", 0xCF) kAsmOpcodeDecl("retf", 0xCB)
+            kAsmOpcodeDecl("retn", 0xC3) kAsmOpcodeDecl("ret", 0xC3) kAsmOpcodeDecl("sti", 0xfb)
+                kAsmOpcodeDecl("cli", 0xfa) kAsmOpcodeDecl("hlt", 0xf4) kAsmOpcodeDecl("nop", 0x90)
+                    kAsmOpcodeDecl("mov", 0x48) kAsmOpcodeDecl("call", 0xFF)};
+
+#define kAsmRegisterLimit 16