mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-11-13 10:06:43 +00:00
39 lines
758 B
ArmAsm
39 lines
758 B
ArmAsm
;;;
|
|
;;;
|
|
;;; isprint-arch.S
|
|
;;;
|
|
;;; Architecture depend isprint function.
|
|
;;;
|
|
;;; @author Takahide Matsutsuka <markn@markn.org>
|
|
;;;
|
|
;;; $Id: isprint_arch.S,v 1.1 2007/09/11 12:12:59 matsutsuka Exp $
|
|
;;;
|
|
.globl _isprint_arch
|
|
.area _GSINIT
|
|
|
|
;; unsigned long clock_time();
|
|
;; return long value as (DE, BC)
|
|
|
|
;; this function is identify if a given
|
|
;; character is printable on PC-6001
|
|
.area _CODE
|
|
_isprint_arch:
|
|
;; ---------------------------------
|
|
;; char isprint (unsigned char ch);
|
|
;; Stack; retl reth ch
|
|
;; A_____HL____
|
|
;; return l
|
|
;; ---------------------------------
|
|
ld hl, #2
|
|
add hl, sp
|
|
ld a, (hl)
|
|
or a
|
|
jr z, #_isprint_arch_ret_false
|
|
cp #0xfe
|
|
jr nc, #_isprint_arch_ret_false
|
|
ld l, #1
|
|
ret
|
|
_isprint_arch_ret_false:
|
|
ld l, #0
|
|
ret
|