main.asm

dsp实验箱的多个样例程序

	.mmregs
	.global	_main
	.global	_alaw_compress
	.global	_alaw_expand

Length		.set	80

	.bss	Input, Length
	.bss	Package, Length
	.bss	Output, Length

	.text
_main:
	stm	#Input,ar2

	st	#13527,*ar2
	stm	Length-1-1,brc
	rptb	L1-1
	mpy	*ar2+,#521,a
	add	#259,a
	stl	a,*ar2
L1:
	addm	#-1,*(sp)
	ld	#Length,a
	nop
	pshm	al
	ld	#Package,a
	nop
	pshm	al
	ld	#Input,a
        call	_alaw_compress
	addm	#2,*(sp)
	ld	#Length,a
	nop
	pshm	al
	ld	#Package,a
	nop
	pshm	al
	ld	#Output,a
        call	_alaw_expand
	addm	#3,*(sp)
	nop
	nop
        ret