《基于TI DSP的通用算法实现》程序代码

				
				; Example 5 - 11. FIR Filter Implementation ASM Listing for the TMS320C3x DSP
				
					LDI	@ADDXN, AR1				; AR1points to x[n-L+1]
					LDI	@ADDBI, AR0				; AR0 points to b[L-1]
					LDI	L, BK						; circular buffer size=L
					LDI	L-2	, RC					; L-2→repeat counter
					LDF	@XN	, R2					; x[n]→R2
					STF	R2, AR1++(1)%				; store x[n] in buffer and
													; update pointer AR1
					STL	AR1, @ADDXN				; save new address of x[n-L+1]
					CALL	FIR_filter				; call FIR_filter routine to compute y[n]
				
				FIR_filter：
					MPYF3	*AR0++(1)%, *AR1++(1)%, R1		; b[0]*x[0]
					NOP
					LDF	0.0, R2
					RPTS	RC					; repeat next parallel instructions L-1 times
					MOY3	*AR0++(1)%, *AR1++(1)%, R1		; b[i]*x[n-i]
				||	ADDF3	R1, R2, R2					; sum of products b[i]*x[n-i]
					ADDF3	R1, R2, R2					; sum the last product
					RETS