Add startup.nsh to QEMU drive

[rrq/jonasforth.git] / impl.asm

diff --git a/impl.asm b/impl.asm
index ea6c04ebd42155a2dd5f495ac57874308ad2fbe4..67d11b57ac02a3b7378c6f87d6b0276d39c91b19 100644 (file)
--- a/impl.asm
+++ b/impl.asm
@@ -1,6 +1,4 @@
-;; vim: syntax=fasm
-
-section '.text' code readable executable
+os_code_section
 
 macro printlen msg, len {
   push rsi
@@ -8,7 +6,7 @@ macro printlen msg, len {
 
   mov rcx, msg
   mov rdx, len
-  sys_print_string
+  call os_print_string
 
   sub rsp, 8
   pop rsi
@@ -69,52 +67,6 @@ find:
 .found:
   ret
 
-;; Read a word from standard input. Returns pointer to string containing word as
-;; well as length.
-;;
-;; Results:
-;;   * rdx = Length of string
-;;   * rdi = Pointer to string buffer
-;;
-;; Clobbers pretty much everything.
-read_word:
-.skip_whitespace:
-  ;; Read characters into .char_buffer until one of them is not whitespace.
-  mov rsi, .char_buffer
-  sys_read_char
-
-  ;; We consider newlines and spaces to be whitespace.
-  cmp [.char_buffer], ' '
-  je .skip_whitespace
-  cmp [.char_buffer], $A
-  je .skip_whitespace
-
-.alpha:
-  ;; We got a character that wasn't whitespace. Now read the actual word.
-  mov [.length], 0
-
-.read_alpha:
-  mov al, [.char_buffer]
-  movzx rbx, [.length]
-  mov rsi, .buffer
-  add rsi, rbx
-  mov [rsi], al
-  inc [.length]
-
-  mov rsi, .char_buffer
-  sys_read_char
-
-  cmp [.char_buffer], ' '
-  je .end
-  cmp [.char_buffer], $A
-  jne .read_alpha
-
-.end:
-  mov rdi, .buffer
-  movzx rdx, [.length]
-
-  ret
-
 ;; Read a word from a buffer. Returns the buffer without the word, as well as
 ;; the word that was read (including lengths).
 ;;
@@ -229,18 +181,14 @@ parse_number:
   pop rdi
   printlen rdi, [.length]
   newline
-  sys_terminate 100
+  mov rax, 100
+  call os_terminate
 
-section '.data' readable writable
+os_data_section
 
 find.search_length dq ?
 find.search_buffer dq ?
 
-read_word.max_size = $FF
-read_word.buffer rb read_word.max_size
-read_word.length db ?
-read_word.char_buffer db ?
-
 parse_number.length dq ?
 parse_number.error_msg string "Invalid number: "