_strlen.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 _strlen
	
.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 _strlen
;--------------------------------------------------------
; 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)
;--------------------------------------------------------
; global & static initialisations
;--------------------------------------------------------
	.area GSINIT  (CODE)
	.area GSFINAL (CODE)
	.area GSINIT  (CODE)
;--------------------------------------------------------
; Home
;--------------------------------------------------------
	.area HOME	 (CODE)
	.area CSEG    (CODE)
;--------------------------------------------------------
; code
;--------------------------------------------------------
	.area CSEG    (CODE)
;	_strlen.c 27
;	genFunction 
;	-----------------------------------------
;	 function strlen
;	-----------------------------------------
_strlen:
	ar2 = 0x02
	ar3 = 0x03
	ar4 = 0x04
	ar5 = 0x05
	ar6 = 0x06
	ar7 = 0x07
	ar0 = 0x00
	ar1 = 0x01
;	_strlen.c 34
;	genReceive 
	mov	r2,dpl
	mov	r3,dph
	mov	r4,dpx
	mov	r5,b
;	_strlen.c 31
;	genAssign 
;	genAssign: resultIsFar = TRUE
	mov	r6,#0x00
	mov	r7,#0x00
;	genAssign 
;	genAssign: resultIsFar = TRUE
;	genLabel 
00101$:
;	genPointerGet 
;	genGenPointerGet 
	mov	dpl,r2
	mov	dph,r3
	mov	dpx,r4
	mov	b,r5
	lcall	__gptrget
	mov	r0,a
;	genPlus 
	inc	r2
	cjne	r2,#0x00,00108$
	inc	r3
	cjne	r3,#0x00,00108$
	inc	r4
00108$:
;	did genPlusIncr
;	genIfx 
	mov	a,r0
;	genIfxJump 
; Peephole 110   removed ljmp by inverse jump logic
	jz  00103$
00109$:
;	_strlen.c 32
;	genPlus 
;	tail increment optimized (range 4)
	inc	r6
	cjne	r6,#0x00,00101$
	inc	r7
;	did genPlusIncr
;	genGoto 
;	genLabel 
; Peephole 132   changed ljmp to sjmp
	sjmp 00101$
00103$:
;	_strlen.c 34
;	genRet 
	mov	dpl,r6
	mov	dph,r7
;	genLabel 
00104$:
;	genEndFunction 
	ret
	.area CSEG    (CODE)