_mulint.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 10:57:45 2001

;--------------------------------------------------------
	.module _mulint
	
.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 __mulsint_PARM_2
	.globl __muluint_PARM_2
	.globl __muluint
	.globl __mulsint
;--------------------------------------------------------
; 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)
__muluint_PARM_2::
	.ds 2
__mulsint_PARM_2::
	.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)
;	_mulint.c 62
;	genFunction 
;	-----------------------------------------
;	 function _muluint
;	-----------------------------------------
__muluint:
	ar2 = 0x02
	ar3 = 0x03
	ar4 = 0x04
	ar5 = 0x05
	ar6 = 0x06
	ar7 = 0x07
	ar0 = 0x00
	ar1 = 0x01
;	_mulint.c 98
;	genInline 
	    mov r2,dph ; msb_a
	    mov r3,dpl ; lsb_a
	    mov b,r3 ; lsb_a
	    mov dptr,#__muluint_PARM_2
	    movx a,@dptr ; lsb_b
	    mul ab ; lsb_a*lsb_b
	    mov r0,a
	    mov r1,b
	    mov b,r2 ; msb_a
	    movx a,@dptr ; lsb_b
	    mul ab ; msb_a*lsb_b
	    add a,r1
	    mov r1,a
	    mov b,r3 ; lsb_a
	    inc dptr
	    movx a,@dptr ; msb_b
	    mul ab ; lsb_a*msb_b
	    add a,r1
	    mov dph,a
	    mov dpl,r0
	    ret
;	genLabel 
00101$:
;	genEndFunction 
	ret
;	_mulint.c 102
;	genFunction 
;	-----------------------------------------
;	 function _mulsint
;	-----------------------------------------
__mulsint:
;	_mulint.c 0
;	genReceive 
	mov	r2,dpl
	mov	r3,dph
;	_mulint.c 104
;	genAssign 
	mov	dptr,#__mulsint_PARM_2
;	genAssign: resultIsFar = TRUE
;	genFarFarAssign
	movx	a,@dptr
	mov	r4,a
	inc	dptr
	movx	a,@dptr
	mov	r5,a
;	genAssign 
;	genAssign: resultIsFar = TRUE
	mov	dptr,#__muluint_PARM_2
	mov	a,r4
	movx	@dptr,a
	inc	dptr
	mov	a,r5
	movx	@dptr,a
;	genCall 
	mov	dpl,r2
	mov	dph,r3
	lcall	__muluint
;	genAssign 
;	genAssign: resultIsFar = FALSE
;	genRet 
;	genLabel 
;	genEndFunction 
; Peephole 151   removed misc moves via dph, dpl before return
00101$:
	ret
	.area CSEG    (CODE)