_strncpy.asm

很少见的源码公开的msc51和z80的c编译器。

;--------------------------------------------------------
; File Created by SDCC : FreeWare ANSI-C Compiler
; Version 2.3.0 Thu Sep 20 10:57:39 2001

;--------------------------------------------------------
	.module _strncpy
	
.flat24 on		; 24 bit flat addressing
dpx = 0x93		; dpx register unknown to assembler
dps = 0x86		; dps register unknown to assembler
dpl1 = 0x84		; dpl1 register unknown to assembler
dph1 = 0x85		; dph1 register unknown to assembler
dpx1 = 0x95		; dpx1 register unknown to assembler
ap = 0x9C		; ap register unknown to assembler
;--------------------------------------------------------
; Public variables in this module
;--------------------------------------------------------
	.globl _strncpy_PARM_3
	.globl _strncpy_PARM_2
	.globl _strncpy
;--------------------------------------------------------
; special function registers
;--------------------------------------------------------
;--------------------------------------------------------
; special function bits 
;--------------------------------------------------------
;--------------------------------------------------------
; internal ram data
;--------------------------------------------------------
	.area DSEG    (DATA)
;--------------------------------------------------------
; overlayable items in internal ram 
;--------------------------------------------------------
	.area OSEG    (OVR,DATA)
;--------------------------------------------------------
; indirectly addressable internal ram data
;--------------------------------------------------------
	.area ISEG    (DATA)
;--------------------------------------------------------
; bit data
;--------------------------------------------------------
	.area BSEG    (BIT)
;--------------------------------------------------------
; external ram data
;--------------------------------------------------------
	.area XSEG    (XDATA)
_strncpy_PARM_2::
	.ds 4
_strncpy_PARM_3::
	.ds 2
_strncpy_d_1_1::
	.ds 4
_strncpy_d1_1_1::
	.ds 4
_strncpy_sloc0_1_0::
	.ds 2
_strncpy_sloc1_1_0::
	.ds 2
;--------------------------------------------------------
; global & static initialisations
;--------------------------------------------------------
	.area GSINIT  (CODE)
	.area GSFINAL (CODE)
	.area GSINIT  (CODE)
;--------------------------------------------------------
; Home
;--------------------------------------------------------
	.area HOME	 (CODE)
	.area CSEG    (CODE)
;--------------------------------------------------------
; code
;--------------------------------------------------------
	.area CSEG    (CODE)
;	_strncpy.c 27
;	genFunction 
;	-----------------------------------------
;	 function strncpy
;	-----------------------------------------
_strncpy:
	ar2 = 0x02
	ar3 = 0x03
	ar4 = 0x04
	ar5 = 0x05
	ar6 = 0x06
	ar7 = 0x07
	ar0 = 0x00
	ar1 = 0x01
;	_strncpy.c 36
;	genReceive 
	mov	r2,dpl
	mov	r3,dph
	mov	r4,dpx
	mov	r5,b
;	_strncpy.c 32
;	genAssign 
;	genAssign: resultIsFar = TRUE
	mov	dptr,#_strncpy_d1_1_1
	mov	a,r2
	movx	@dptr,a
	inc	dptr
	mov	a,r3
	movx	@dptr,a
	inc	dptr
	mov	a,r4
	movx	@dptr,a
	inc	dptr
	mov	a,r5
	movx	@dptr,a
;	_strncpy.c 34
;	genAssign 
	mov	dptr,#_strncpy_PARM_2
;	genAssign: resultIsFar = FALSE
	movx	a,@dptr
	mov	r6,a
	inc	dptr
	movx	a,@dptr
	mov	r7,a
	inc	dptr
	movx	a,@dptr
	mov	r0,a
	inc	dptr
	movx	a,@dptr
	mov	r1,a
;	genAssign 
;	genAssign: resultIsFar = TRUE
	mov	dptr,#_strncpy_d_1_1
	mov	a,r2
	movx	@dptr,a
	inc	dptr
	mov	a,r3
	movx	@dptr,a
	inc	dptr
	mov	a,r4
	movx	@dptr,a
	inc	dptr
	mov	a,r5
	movx	@dptr,a
;	genAssign 
	mov	dptr,#_strncpy_PARM_3
;	genAssign: resultIsFar = TRUE
;	genFarFarAssign (390 auto-toggle fun)
	mov	dps, #0x21
	mov	dptr,#_strncpy_sloc0_1_0
	movx	a,@dptr
	movx	@dptr,a
	inc	dptr
	inc	dptr
	movx	a,@dptr
	movx	@dptr,a
	mov	dps, #0
;	genLabel 
00101$:
;	genAssign 
	mov	dptr,#_strncpy_sloc0_1_0
;	genAssign: resultIsFar = TRUE
;	genFarFarAssign (390 auto-toggle fun)
	mov	dps, #0x21
	mov	dptr,#_strncpy_sloc1_1_0
	movx	a,@dptr
	movx	@dptr,a
	inc	dptr
	inc	dptr
	movx	a,@dptr
	movx	@dptr,a
	mov	dps, #0
;	genMinus 
	mov	dptr,#_strncpy_sloc0_1_0
	movx	a,@dptr
	add	a,#0xff
	movx	@dptr,a
	inc	dptr
	movx	a,@dptr
	addc	a,#0xff
	movx	@dptr,a
;	genIfx 
	mov	dptr,#_strncpy_sloc1_1_0
	push	b
	movx	a,@dptr
	mov	b, a
	inc	dptr
	movx	a,@dptr
	orl	b,a
	mov	a,b
	pop	b
;	genIfxJump 
	jnz	00108$
	ljmp	00103$
00108$:
;	_strncpy.c 35
;	genPointerGet 
;	genGenPointerGet 
	mov	dpl,r6
	mov	dph,r7
	mov	dpx,r0
	mov	b,r1
	lcall	__gptrget
	mov	r2,a
;	genPlus 
	inc	r6
	cjne	r6,#0x00,00109$
	inc	r7
	cjne	r7,#0x00,00109$
	inc	r0
00109$:
;	did genPlusIncr
;	genPointerSet 
	mov     dps, #0x01
	mov     dptr, #_strncpy_d_1_1
	movx	a,@dptr
	mov	dpl,a
	inc	dptr
	movx	a,@dptr
	mov	dph,a
	inc	dptr
	movx	a,@dptr
	mov	dpx,a
	inc	dptr
	movx	a,@dptr
	mov	b,a
	mov	dps, #0x00
	mov	a,r2
	lcall	__gptrput
;	genPlus 
	mov	dptr,#_strncpy_d_1_1
;	Swapped plus args.
	movx	a,@dptr
	add	a,#0x01
	movx	@dptr,a
	inc	dptr
	movx	a,@dptr
	addc	a,#0x00
	movx	@dptr,a
	inc	dptr
	movx	a,@dptr
	addc	a,#0x00
	movx	@dptr,a
	inc	dptr
	movx	a,@dptr
	movx	@dptr,a
;	genGoto 
	ljmp	00101$
;	genLabel 
00103$:
;	_strncpy.c 36
;	genRet 
	mov     dps, #0x01
	mov     dptr, #_strncpy_d1_1_1
	movx	a,@dptr
	mov	dpl,a
	inc	dptr
	movx	a,@dptr
	mov	dph,a
	inc	dptr
	movx	a,@dptr
	mov	dpx,a
	inc	dptr
	movx	a,@dptr
	mov	b,a
	mov	dps, #0x00
;	genLabel 
00104$:
;	genEndFunction 
	ret
	.area CSEG    (CODE)