uint2fps16x16.s

来自「sdcc是为51等小型嵌入式cpu设计的c语言编译器支持数种不同类型的cpu」· S 代码 · 共 50 行

;
; uint2fps16x16.S - convert signed char to fixed16x16
;
; written by Vangelis Rokas, 2004 <vrokas AT otenet.gr>
;
;
; $Id: uint2fps16x16.S 3838 2005-08-10 10:53:34Z tecodev $
;

	radix dec

;--------------------------------------------------------
; public variables in this module
;--------------------------------------------------------
	global ___uint2fps16x16

;--------------------------------------------------------
;	Equates to used internal registers
;--------------------------------------------------------
STATUS	equ	0xfd8
WREG	equ	0xfe8
FSR0L	equ	0xfe9
FSR1L	equ	0xfe1
FSR2L	equ	0xfd9
POSTDEC1	equ	0xfe5
PREINC1	equ	0xfe4
PLUSW1	equ	0xfe3
PRODL	equ	0xff3
PRODH	equ	0xff4


S_uint2fps16x16____uint2fps16x16	code
___uint2fps16x16:

	movlw	0x02
	movff	PLUSW1, FSR0L
	movlw	0x01
	movff	PLUSW1, PRODH

	clrf	WREG
	clrf	PRODL

	bcf	FSR0L, 7

@1:
	return

	end