From 50964e945e5643ac3fbc3fc2237c27f16927a9ce Mon Sep 17 00:00:00 2001
From: andromeda <andromeda@lenovo>
Date: Sat, 7 Mar 2026 16:44:40 +0100
Subject: [PATCH] encode register tokens

---
 twasm/README.md    |  79 ++++++++++++++++++++++
 twasm/asm/main.asm | 165 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 244 insertions(+)

diff --git a/twasm/README.md b/twasm/README.md
index 6640f5d..a8ad332 100644
--- a/twasm/README.md
+++ b/twasm/README.md
@@ -48,4 +48,83 @@ supported tokens are listed below
 
 | token | id     | notes |
 |-------|--------|-|
+| rax   | 0x0000 | |
+| rbx   | 0x0001 | |
+| rcx   | 0x0002 | |
+| rdx   | 0x0003 | |
+| rsi   | 0x0004 | |
+| rdi   | 0x0005 | |
+| rsp   | 0x0006 | |
+| rbp   | 0x0007 | |
+| r8    | 0x0008 | |
+| r9    | 0x0009 | |
+| r10   | 0x000A | |
+| r11   | 0x000B | |
+| r12   | 0x000C | |
+| r13   | 0x000D | |
+| r14   | 0x000E | |
+| r15   | 0x000F | |
+| eax   | 0x0010 | |
+| ebx   | 0x0011 | |
+| ecx   | 0x0012 | |
+| edx   | 0x0013 | |
+| esi   | 0x0014 | |
+| edi   | 0x0015 | |
+| esp   | 0x0016 | |
+| ebp   | 0x0017 | |
+| r8d   | 0x0018 | |
+| r9d   | 0x0019 | |
+| r10d  | 0x001A | |
+| r11d  | 0x001B | |
+| r12d  | 0x001C | |
+| r13d  | 0x001D | |
+| r14d  | 0x001E | |
+| r15d  | 0x001F | |
+| ax    | 0x0020 | |
+| bx    | 0x0021 | |
+| cx    | 0x0022 | |
+| dx    | 0x0023 | |
+| si    | 0x0024 | |
+| di    | 0x0025 | |
+| sp    | 0x0026 | |
+| bp    | 0x0027 | |
+| r8w   | 0x0028 | |
+| r9w   | 0x0029 | |
+| r10w  | 0x002A | |
+| r11w  | 0x002B | |
+| r12w  | 0x002C | |
+| r13w  | 0x002D | |
+| r14w  | 0x002E | |
+| r15w  | 0x002F | |
+| al    | 0x0030 | |
+| bl    | 0x0031 | |
+| cl    | 0x0032 | |
+| dl    | 0x0033 | |
+| sil   | 0x0034 | |
+| dil   | 0x0035 | |
+| spl   | 0x0036 | |
+| bpl   | 0x0037 | |
+| r8b   | 0x0038 | |
+| r9b   | 0x0039 | |
+| r10b  | 0x003A | |
+| r11b  | 0x003B | |
+| r12b  | 0x003C | |
+| r13b  | 0x003D | |
+| r14b  | 0x003E | |
+| r15b  | 0x003F | |
+| ah    | 0x0040 | |
+| bh    | 0x0041 | |
+| ch    | 0x0042 | |
+| dh    | 0x0043 | |
+| cs    | 0x0044 | |
+| ds    | 0x0045 | |
+| es    | 0x0046 | |
+| fs    | 0x0047 | |
+| gs    | 0x0048 | |
+| ss    | 0x0049 | |
+| cr0   | 0x004A | |
+| cr2   | 0x004B | |
+| cr3   | 0x004C | |
+| cr4   | 0x004D | |
+| cr8   | 0x004E | |
 |       | 0xFFFF | unrecognised token |
diff --git a/twasm/asm/main.asm b/twasm/asm/main.asm
index d2a6431..e26afb0 100644
--- a/twasm/asm/main.asm
+++ b/twasm/asm/main.asm
@@ -388,6 +388,171 @@ test_elemb:
 ; data
 ; ------------------------------------------------------------------------------
 
+tokens:
+  .length2
+    db "r8"
+    dw 0x0008
+    db "r9"
+    dw 0x0009
+    db "ax"
+    dw 0x0020
+    db "bx"
+    dw 0x0021
+    db "cx"
+    dw 0x0022
+    db "dx"
+    dw 0x0023
+    db "si"
+    dw 0x0024
+    db "di"
+    dw 0x0025
+    db "sp"
+    dw 0x0026
+    db "bp"
+    dw 0x0027
+    db "al"
+    dw 0x0030
+    db "bl"
+    dw 0x0031
+    db "cl"
+    dw 0x0032
+    db "dl"
+    dw 0x0033
+    db "ah"
+    dw 0x0040
+    db "bh"
+    dw 0x0041
+    db "ch"
+    dw 0x0042
+    db "dh"
+    dw 0x0043
+    db "cs"
+    dw 0x0044
+    db "ds"
+    dw 0x0045
+    db "es"
+    dw 0x0046
+    db "fs"
+    dw 0x0047
+    db "gs"
+    dw 0x0048
+    db "ss"
+    dw 0x0049
+  .length3
+    db "rax"
+    dw 0x0000
+    db "rbx"
+    dw 0x0001
+    db "rcx"
+    dw 0x0002
+    db "rdx"
+    dw 0x0003
+    db "rsi"
+    dw 0x0004
+    db "rdi"
+    dw 0x0005
+    db "rsp"
+    dw 0x0006
+    db "rbp"
+    dw 0x0007
+    db "r10"
+    dw 0x000A
+    db "r11"
+    dw 0x000B
+    db "r12"
+    dw 0x000C
+    db "r13"
+    dw 0x000D
+    db "r14"
+    dw 0x000E
+    db "r15"
+    dw 0x000F
+    db "eax"
+    dw 0x0010
+    db "ebx"
+    dw 0x0011
+    db "ecx"
+    dw 0x0012
+    db "edx"
+    dw 0x0013
+    db "esi"
+    dw 0x0014
+    db "edi"
+    dw 0x0015
+    db "esp"
+    dw 0x0016
+    db "ebp"
+    dw 0x0017
+    db "r8d"
+    dw 0x0018
+    db "r9d"
+    dw 0x0019
+    db "r8w"
+    dw 0x0028
+    db "r9w"
+    dw 0x0029
+    db "sil"
+    dw 0x0034
+    db "dil"
+    dw 0x0035
+    db "spl"
+    dw 0x0036
+    db "bpl"
+    dw 0x0037
+    db "r8b"
+    dw 0x0038
+    db "r9b"
+    dw 0x0039
+    db "cr0"
+    dw 0x004A
+    db "cr2"
+    dw 0x004B
+    db "cr3"
+    dw 0x004C
+    db "cr4"
+    dw 0x004D
+    db "cr8"
+    dw 0x004E
+  .length4
+    db "r10d"
+    dw 0x001A
+    db "r11d"
+    dw 0x001B
+    db "r12d"
+    dw 0x001C
+    db "r13d"
+    dw 0x001D
+    db "r14d"
+    dw 0x001E
+    db "r15d"
+    dw 0x001F
+    db "r10w"
+    dw 0x002A
+    db "r11w"
+    dw 0x002B
+    db "r12w"
+    dw 0x002C
+    db "r13w"
+    dw 0x002D
+    db "r14w"
+    dw 0x002E
+    db "r15w"
+    dw 0x002F
+    db "r10b"
+    dw 0x003A
+    db "r11b"
+    dw 0x003B
+    db "r12b"
+    dw 0x003C
+    db "r13b"
+    dw 0x003D
+    db "r14b"
+    dw 0x003E
+    db "r15b"
+    dw 0x003F
+  .length5
+  .end
+
 msg_welcome db "Welcome to Twasm", 0x0D, 0x0A, 0x00
 msg_halt db "halted.", 0x0D, 0x0A, 0x00
 msg_pass db "passed.", 0x0D, 0x0A, 0x00