Little bit of clean up and organization

decoder8086.odin

@@ -17,40 +17,12 @@ Register :: struct {
     code: u8,
 }
 
-registers := [8]Register {
-    {fullname = "ax", bytename = "al", code = 0b000},
-    {fullname = "cx", bytename = "cl", code = 0b001},
-    {fullname = "dx", bytename = "dl", code = 0b010},
-    {fullname = "bx", bytename = "bl", code = 0b011},
-    {fullname = "sp", bytename = "ah", code = 0b100},
-    {fullname = "bp", bytename = "ch", code = 0b101},
-    {fullname = "si", bytename = "dh", code = 0b110},
-    {fullname = "di", bytename = "bh", code = 0b111},
-}
-
-segment_registers := [4]Register {
-    {fullname = "es", code = 0b000},
-    {fullname = "cs", code = 0b001},
-    {fullname = "ss", code = 0b010},
-    {fullname = "ds", code = 0b011},
-}
-
-variable_port := registers[2]
-
-total_bytes_processed := 0
-
-RegInfo :: struct {
-    in_first_byte: bool,
-    shift_offset: u8,
-}
-
 WordSize :: enum {
     None,
     LastBit,
     FourthBit,
     Always8,
     Always16,
-    Unsigned8,
 }
 
 None :: struct {}
@@ -63,26 +35,6 @@ Displacement :: union {
     Disp16
 }
 
-Value8 :: i8
-Value16 :: i16
-Data :: union {
-    None,
-    Value8,
-    Value16
-}
-
-ModMemory :: struct {}
-Mod8BitDisp :: i8
-Mod16BitDisp :: i16
-ModRegister :: struct {}
-
-ModMode :: union {
-    ModMemory,
-    Mod8BitDisp,
-    Mod16BitDisp,
-    ModRegister,
-}
-
 RegisterId :: distinct u8
 Immediate8 :: distinct i8
 Immediate16 :: distinct i16
@@ -163,6 +115,30 @@ InstructionInfo :: struct {
 
 RIGHT_ALIGN_AMOUNT := 35
 
+registers := [8]Register {
+    {fullname = "ax", bytename = "al", code = 0b000},
+    {fullname = "cx", bytename = "cl", code = 0b001},
+    {fullname = "dx", bytename = "dl", code = 0b010},
+    {fullname = "bx", bytename = "bl", code = 0b011},
+    {fullname = "sp", bytename = "ah", code = 0b100},
+    {fullname = "bp", bytename = "ch", code = 0b101},
+    {fullname = "si", bytename = "dh", code = 0b110},
+    {fullname = "di", bytename = "bh", code = 0b111},
+}
+
+segment_registers := [4]Register {
+    {fullname = "es", code = 0b000},
+    {fullname = "cs", code = 0b001},
+    {fullname = "ss", code = 0b010},
+    {fullname = "ds", code = 0b011},
+}
+
+variable_port := registers[2]
+
+total_bytes_processed := 0
+
+instruction_builder := strings.builder_make()
+
 get_i16 :: proc(data: []u8) -> i16 {
     return (i16)(data[1]) << 8 | (i16)(data[0])
 }
@@ -477,16 +453,12 @@ main :: proc() {
     // asdf2 :i16 = (i16)(asdf)
     // fmt.printfln("%d", asdf2)
     print_at_end := false
-    read_next := false
-    src_dst := true
     idx := 0
-    added_label := false
     line_count := 0
     has_lock: bool
     has_segment: Maybe(Register)
     last_opname: [3]byte
     repeating_op_count := 0
-    instruction_builder := strings.builder_make()
     instruction_list := make([dynamic]string, 512)
     fmt.println("bits 16\n")
     for idx < bytes_read {
@@ -540,17 +512,12 @@ main :: proc() {
         }
 
         opname: string
-        // TODO: Figure out a way to do this in the string builder
         if inst.check_second_encoding {
-            op,interseg := get_opname(inst.opname, data[idx:])
-            indirect_intersegment = interseg
-            opname = strings.to_lower(fmt.aprintf("%s", op))
+            opname,indirect_intersegment = get_opname(inst.opname, data[idx:])
             // NOTE: This is a special case because it matches the bit pattern of .TBD5,
             // but the instruction itself is different
             if opname == "test" && (curr_byte & 0xFF) == 0b11110110 {
                 inst = test_inst
-            // } else if opname == "neg" {
-            //     inst = neg_inst
             }
         } else {
             opname = strings.to_lower(fmt.aprintf("%s", inst.opname))

instructions.odin

@@ -96,6 +96,10 @@ OpName :: enum {
     JCXZ,
 }
 
+// TODO: We should figure out another way of handling this case. The way we're doing it
+// isn't that great; we return a string with the instruction name, but ideally we have all
+// the instructions accounted for, because eventually we will need the final parsed
+// instruction to contain all the information related to it
 test_inst := InstructionInfo {
     opname = .NOT, desc = "", mask = 0b11111110, encoding = 0b11110110,
     dst = .RegisterMemory, src = .Immediate, word_size = .LastBit
@@ -170,12 +174,7 @@ instructions := [?]InstructionInfo {
       dst = .Accumulator, src = .Register,
       reg_info = .FirstByteLast3, has_flip = true, word_size = .Always16 },
     { opname = .IN, desc = "", mask = 0b11111110, encoding = 0b11100100,
-      dst = .Accumulator, src = .ImmediateUnsigned,
-      // TODO: Everything works just fine, but the problem here is that if you want it to
-      // show up as an unsigned int, then we have to change the types because the number
-      // 200, for instance, will show up as a negative, we would have to create an unsigned
-      // variant of the Immediate value. Maybe we can have the value and the sign as a struct
-      word_size = .Unsigned8, },
+      dst = .Accumulator, src = .ImmediateUnsigned },
     { opname = .IN, desc = "", mask = 0b11111110, encoding = 0b11101100,
       dst = .Accumulator, src = .VariablePort,
       word_size = .LastBit, },
@@ -236,7 +235,6 @@ instructions := [?]InstructionInfo {
     { opname = .STI,  desc = "", mask = 0b11111111, encoding = 0b11111011,},
     { opname = .HLT,  desc = "", mask = 0b11111111, encoding = 0b11110100,},
     { opname = .WAIT, desc = "", mask = 0b11111111, encoding = 0b10011011,},
-    // { opname = .ESC,  desc = "", mask = 0b11111111, encoding = 0b11111000, dst = },
     { opname = .LOCK, desc = "", mask = 0b11111111, encoding = 0b11110000,},
     { opname = .SEGMENT, desc = "", mask = 0b11100111, encoding = 0b00100110,},
     { opname = .CALL, desc = "", mask = 0b11111111, encoding = 0b10011010, src = .Intersegment  },