From eac867607d2363de6a68b9d51cb6abd496cce51d Mon Sep 17 00:00:00 2001
From: xolatile <xolatile@proton.me>
Date: Mon, 1 Jul 2024 22:54:37 -0400
Subject: [PATCH] Formatting of regular insstructions...

---
 source/assembler.c | 41 ++++++++++++++++++++++++++++++++++++-----
 source/assembler.h | 11 +++++++----
 2 files changed, 43 insertions(+), 9 deletions(-)

diff --git a/source/assembler.c b/source/assembler.c
index 7e65a74..5659564 100644
--- a/source/assembler.c
+++ b/source/assembler.c
@@ -1,12 +1,43 @@
 #include "assembler.h"
 
+static void byte_push (byte data) {
+	byte_array [byte_count] = data;
+
+	byte_count += 1;
+}
+
 static void assemble_xor (size_index size,
                           type_index type,
-                          size_t     destination,
-                          size_t     source) {
-	// ERROR CHECKING
+                          form       destination,
+                          form       source) {
+	byte set = 0;
+	byte mod = 0;
 
-	// byte_array [byte_count] = ...;
+	if (size == size_256b) exit (EXIT_FAILURE);
+	if (size == size_128b) exit (EXIT_FAILURE);
 
-	// byte_count += ...;
+	if (size == size_64b) byte_push (0X48);
+
+	switch (type) {
+		case type_register_register: set += 0X30; break;
+		case type_register_variable: set += 0X32; break;
+		case type_register_constant: set += 0X80; break;
+		case type_variable_register: set += 0X30; break;
+		case type_variable_constant: set += 0X80; break;
+		default: exit (EXIT_FAILURE);
+	}
+
+	if (size != size_8b) set += 1;
+
+	if ((type == type_register_constant) && (destination == 0)) set += 4;
+
+	byte_push (set);
+
+	// FORMAT MOD/SIB BYTE IF NEEDED...
+
+	byte_push (mod);
+
+	// FORMAT MEMORY OR IMMEDIATE IF NEEDED...
+
+	// ...
 }
diff --git a/source/assembler.h b/source/assembler.h
index 0244d23..a54aa87 100644
--- a/source/assembler.h
+++ b/source/assembler.h
@@ -66,15 +66,18 @@ typedef enum {
 	command_length
 } command_index;
 
-typedef unsigned int  data;
+typedef signed   int  form;
+typedef unsigned int  next;
 typedef unsigned char byte;
 
-static data   byte_count = 0;
+static next   byte_count = 0;
 static byte * byte_array = NULL;
 
+static void byte_push (byte data);
+
 static void assemble_xor (size_index size,
                           type_index type,
-                          size_t     destination,
-                          size_t     source);
+                          form       destination,
+                          form       source);
 
 #endif