diff options
Diffstat (limited to 'twasm/asm/main.asm')
| -rw-r--r-- | twasm/asm/main.asm | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/twasm/asm/main.asm b/twasm/asm/main.asm index 8b2d7ef..9c8d483 100644 --- a/twasm/asm/main.asm +++ b/twasm/asm/main.asm @@ -635,6 +635,10 @@ tokenise: test byte [.expecting], E_OPERAND ; make sure an operand was expected jz .unexpected_operand ; if not, error + push rax + push rdi + xor eax, eax ; rax = length of operand + .operand_loop: mov dl, [rdi] @@ -645,10 +649,29 @@ tokenise: cmp dl, 0x00 je .operand_break - inc rdi + inc rax ; inc length counter + inc rdi ; inc byte pointer jmp .operand_loop .operand_break: + pop rdi ; rdi = first byte of operand + push rdi + push rsi + mov rsi, rax ; rsi = length of operand in bytes + + mov cx, ax ; cx = length counter for safe keeping + call evaluate_operand + ; ax = register's token ID + + pop rsi + pop rdi ; rdi = first byte of operand + add di, cx ; rdi = last byte of operand + mov cx, ax ; cx = register's token ID for safe keeping + pop rax ; rax = number of tokens processed + + mov [TOKEN_TABLE_ADDR + rax * TOKEN_TABLE_ENTRY_SIZE], cx + inc rax ; another token processed + mov byte [.expecting], E_COMMENT | E_NEWLINE | E_WHITESPACE | E_COMMA jmp .loop |