_memset.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 10:57:37 2001

;--------------------------------------------------------
	.module _memset
	
.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 _memset_PARM_3
	.globl _memset_PARM_2
	.globl _memset
;--------------------------------------------------------
; 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)
_memset_PARM_2::
	.ds 1
_memset_PARM_3::
	.ds 2
_memset_buf_1_1::
	.ds 4
;--------------------------------------------------------
; global & static initialisations
;--------------------------------------------------------
	.area GSINIT  (CODE)
	.area GSFINAL (CODE)
	.area GSINIT  (CODE)
;--------------------------------------------------------
; Home
;--------------------------------------------------------
	.area HOME	 (CODE)
	.area CSEG    (CODE)
;--------------------------------------------------------
; code
;--------------------------------------------------------
	.area CSEG    (CODE)
;	_memset.c 27
;	genFunction 
;	-----------------------------------------
;	 function memset
;	-----------------------------------------
_memset:
	ar2 = 0x02
	ar3 = 0x03
	ar4 = 0x04
	ar5 = 0x05
	ar6 = 0x06
	ar7 = 0x07
	ar0 = 0x00
	ar1 = 0x01
;	_memset.c 39
;	genReceive 
	push	b
	push	dpx
	push	dph
	push	dpl
	mov	dptr,#_memset_buf_1_1
	pop	acc
	movx	@dptr,a
	pop	acc
	inc	dptr
	movx	@dptr,a
	pop	acc
	inc	dptr
	movx	@dptr,a
	pop	acc
	inc	dptr
	movx	@dptr,a
;	_memset.c 34
;	genAssign 
	mov	dptr,#_memset_buf_1_1
;	genAssign: resultIsFar = TRUE
;	genFarFarAssign
	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 
	mov	dptr,#_memset_PARM_3
;	genAssign: resultIsFar = FALSE
	movx	a,@dptr
	mov	r2,a
	inc	dptr
	movx	a,@dptr
	mov	r3,a
;	genLabel 
00101$:
;	genAssign 
;	genAssign: resultIsFar = FALSE
	mov	ar4,r2
	mov	ar5,r3
;	genMinus 
	dec	r2
	cjne	r2,#0xff,00108$
	dec	r3
00108$:
;	genIfx 
	mov	a,r4
	orl	a,r5
;	genIfxJump 
; Peephole 110   removed ljmp by inverse jump logic
	jz  00103$
00109$:
;	_memset.c 35
;	genPointerSet 
	mov	dpl,r6
	mov	dph,r7
	mov	dpx,r0
	mov	b,r1
	mov     dps, #0x01
	mov     dptr, #_memset_PARM_2
	movx	a,@dptr
	dec	dps
	lcall	__gptrput
;	_memset.c 36
;	genPlus 
;	tail increment optimized (range 5)
	inc	r6
	cjne	r6,#0x00,00101$
	inc	r7
	cjne	r7,#0x00,00101$
	inc	r0
;	did genPlusIncr
;	genGoto 
;	genLabel 
; Peephole 132   changed ljmp to sjmp
	sjmp 00101$
00103$:
;	_memset.c 39
;	genRet 
	mov     dps, #0x01
	mov     dptr, #_memset_buf_1_1
	movx	a,@dptr
	mov	dpl,a
	inc	dptr
	movx	a,@dptr
	mov	dph,a
	inc	dptr
	movx	a,@dptr
	mov	dpx,a
	inc	dptr
	movx	a,@dptr
	mov	b,a
	mov	dps, #0x00
;	genLabel 
00104$:
;	genEndFunction 
	ret
	.area CSEG    (CODE)