zhao6.asm

来自「这里面有很多dsp应用程序源码」· 汇编 代码 · 共 34 行

************************************************
*											   *
*	用进一步优化的方案实现					   *
*	y=(a1*x1+a2*x2+···a19*x19+a20*x20)	  	  *
*											   *
************************************************	
		.title	"zhao6.asm"
		.mmregs
STACK	.usect	"STACK",30H
		.bss	a,20
		.bss	x,20
		.bss	y,2
		.data
table:	.word	1,2,3,4,5,6,7,8,9,10,11
		.word	12,13,14,15,16,17,18,19,20
		.word	21,22,23,24,25,26,27,28
		.word	29,30,1,2,3,4,5,6,7,8,9,10
		.def start
		.text
start:	STM	#0,SWWSR
		STM	#STACK+30H,SP
		STM	#a,AR1
		RPT	#39
		MVPD	table,*AR1+
		CALL	SUM					;调用中断子程序SUM
end:	B	end
SUM:	STM	#a,AR3					;中断子程序SUM
		STM	#x,AR4	
		RPTZ	A,#19				;累加器A清零，并且重复执行下一条指令
		MAC	*AR3+,*AR4+,A
		STL	A,*(y)
		STH	A,*(y+1)
		RET
		.end