_strncmp.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 _strncmp
	
.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 _strncmp_PARM_3
	.globl _strncmp_PARM_2
	.globl _strncmp
;--------------------------------------------------------
; 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)
_strncmp_PARM_2::
	.ds 4
_strncmp_PARM_3::
	.ds 2
_strncmp_sloc0_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)
;	_strncmp.c 27
;	genFunction 
;	-----------------------------------------
;	 function strncmp
;	-----------------------------------------
_strncmp:
	ar2 = 0x02
	ar3 = 0x03
	ar4 = 0x04
	ar5 = 0x05
	ar6 = 0x06
	ar7 = 0x07
	ar0 = 0x00
	ar1 = 0x01
;	_strncmp.c 0
;	genReceive 
	mov	r2,dpl
	mov	r3,dph
	mov	r4,dpx
	mov	r5,b
;	_strncmp.c 33
;	genIfx 
	mov	dptr,#_strncmp_PARM_3
	push	b
	movx	a,@dptr
	mov	b, a
	inc	dptr
	movx	a,@dptr
	orl	b,a
	mov	a,b
	pop	b
;	genIfxJump 
; Peephole 109   removed ljmp by inverse jump logic
	jnz  00114$
00115$:
;	_strncmp.c 34
;	genRet 
; Peephole 181   used 16 bit load of dptr
	mov  dptr,#0x0000
	ljmp	00108$
;	_strncmp.c 36
;	genLabel 
00114$:
;	genAssign 
;	genAssign: resultIsFar = TRUE
;	genAssign 
	mov	dptr,#_strncmp_PARM_2
;	genAssign: resultIsFar = FALSE
	movx	a,@dptr
	mov	r6,a
	inc	dptr
	movx	a,@dptr
	mov	r7,a
	inc	dptr
	movx	a,@dptr
	mov	r0,a
	inc	dptr
	movx	a,@dptr
	mov	r1,a
;	genLabel 
00105$:
;	genMinus 
	mov	dptr,#_strncmp_PARM_3
	mov	dps, #0x01
	mov	dptr, #_strncmp_sloc0_1_0
	dec	dps
	movx	a,@dptr
	add	a,#0xff
	inc	dps
	movx	@dptr,a
	dec	dps
	inc	dptr
	movx	a,@dptr
	addc	a,#0xff
	inc	dps
	inc	dptr
	movx	@dptr,a
	mov	dps, #0x00
;	genAssign 
	mov	dptr,#_strncmp_sloc0_1_0
;	genAssign: resultIsFar = TRUE
;	genFarFarAssign (390 auto-toggle fun)
	mov	dps, #0x21
	mov	dptr,#_strncmp_PARM_3
	movx	a,@dptr
	movx	@dptr,a
	inc	dptr
	inc	dptr
	movx	a,@dptr
	movx	@dptr,a
	mov	dps, #0
;	genIfx 
	mov	dptr,#_strncmp_sloc0_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	00116$
	ljmp	00107$
00116$:
;	genPointerGet 
;	genGenPointerGet 
	mov	dpl,r2
	mov	dph,r3
	mov	dpx,r4
	mov	b,r5
	mov	dps, #0x01
	mov	dptr, #_strncmp_sloc0_1_0
	dec	dps
	lcall	__gptrget
	mov	dps, #0x01
	movx	@dptr,a
	mov	dps, #0x00
;	genIfx 
	mov	dptr,#_strncmp_sloc0_1_0
	movx	a,@dptr
;	genIfxJump 
; Peephole 110   removed ljmp by inverse jump logic
	jz  00107$
00117$:
;	genIpush 
	push	ar2
	push	ar3
	push	ar4
	push	ar5
;	genPointerGet 
;	genGenPointerGet 
	mov	dpl,r6
	mov	dph,r7
	mov	dpx,r0
	mov	b,r1
	lcall	__gptrget
	mov	r2,a
;	genCmpEq 
	mov	dptr,#_strncmp_sloc0_1_0
;	gencjne
;	gencjneshort
	movx	a,@dptr
	cjne	a,ar2,00118$
	mov	a,#0x01
	sjmp	00119$
00118$:
	clr	a
00119$:
;	genIpop 
	pop	ar5
	pop	ar4
	pop	ar3
	pop	ar2
;	genIfx 
;	genIfxJump 
; Peephole 110   removed ljmp by inverse jump logic
	jz  00107$
00120$:
;	_strncmp.c 37
;	genPlus 
	inc	r2
	cjne	r2,#0x00,00121$
	inc	r3
	cjne	r3,#0x00,00121$
	inc	r4
00121$:
;	did genPlusIncr
;	_strncmp.c 38
;	genPlus 
	inc	r6
	cjne	r6,#0x00,00122$
	inc	r7
	cjne	r7,#0x00,00122$
	inc	r0
00122$:
;	did genPlusIncr
;	genGoto 
	ljmp	00105$
;	genLabel 
00107$:
;	_strncmp.c 41
;	genPointerGet 
;	genGenPointerGet 
	mov	dpl,r2
	mov	dph,r3
	mov	dpx,r4
	mov	b,r5
	lcall	__gptrget
	mov	r2,a
;	genPointerGet 
;	genGenPointerGet 
	mov	dpl,r6
	mov	dph,r7
	mov	dpx,r0
	mov	b,r1
	lcall	__gptrget
	mov	r6,a
;	genMinus 
	clr	c
	mov	a,r2
	subb	a,r6
;	genCast 
; Peephole 105   removed redundant mov
	mov  r2,a
	rlc	a
	subb	a,acc
	mov	r3,a
;	genRet 
	mov	dpl,r2
	mov	dph,r3
;	genLabel 
00108$:
;	genEndFunction 
	ret
	.area CSEG    (CODE)