_muluint.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 10:57:15 2001

;--------------------------------------------------------
	.module _muluint
	
;--------------------------------------------------------
; Public variables in this module
;--------------------------------------------------------
	.globl __muluint_PARM_2
	.globl __muluint
;--------------------------------------------------------
; special function registers
;--------------------------------------------------------
;--------------------------------------------------------
; special function bits 
;--------------------------------------------------------
;--------------------------------------------------------
; internal ram data
;--------------------------------------------------------
	.area DSEG    (DATA)
;--------------------------------------------------------
; overlayable items in internal ram 
;--------------------------------------------------------
	.area _DUMMY
	.area	OSEG    (OVR,DATA)
__muluint_PARM_2::
	.ds 2
;--------------------------------------------------------
; 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)
;------------------------------------------------------------
;Allocation info for local variables in function '_muluint'
;------------------------------------------------------------
;	_muluint.c 30
;	-----------------------------------------
;	 function _muluint
;	-----------------------------------------
__muluint:
	ar2 = 0x02
	ar3 = 0x03
	ar4 = 0x04
	ar5 = 0x05
	ar6 = 0x06
	ar7 = 0x07
	ar0 = 0x00
	ar1 = 0x01
;	_muluint.c 78
	    mov r2,dph ; msb_a
	    mov r3,dpl ; lsb_a
	    mov b,r3 ; lsb_a
	    mov a,__muluint_PARM_2 ; lsb_b
	    mul ab ; lsb_a*lsb_b
	    mov r0,a
	    mov r1,b
	    mov b,r2 ; msb_a
	    mov a,__muluint_PARM_2 ; lsb_b
	    mul ab ; msb_a*lsb_b
	    add a,r1
	    mov r1,a
	    mov b,r3 ; lsb_a
	    mov a,1+__muluint_PARM_2 ; msb_b
	    mul ab ; lsb_a*msb_b
	    add a,r1
	    mov dph,a
	    mov dpl,r0
	    ret
00101$:
	ret
	.area CSEG    (CODE)