CCS C6000 C语言和汇编语言混合编程

1. 新建一个Project，在Project中新建一个.sa文件，把你的汇编代码放进去
   这里用了TI官方给的Guide中的5-63为例

	.global _fir
_fir:	.cproc	x,h,y
		.reg	x_1, h_1, sum0, sum1, ctr, octr
		.reg	p00, p01, p10, p11, x0, x1, h0, h1, rstx, rsth

		ADD h,2,h_1
		MVK 50,octr
		MVK 64,rstx
		MVK 64,rsth
OUTLOOP:
		ADD x,2,x_1
		SUB	h_1,2,h
		MVK	16,ctr
		ZERO sum0
		ZERO sum1
		[octr] SUB octr,1,octr
		LDH	.D1	*x++[2],x0

LOOP: .trip 16

		LDH .D2 *x_1++[2],x1 	; x1 = x[j+i+1]
		LDH .D1 *h++[2],h0 		; h0 = h[i]
		MPY .M1 x0,h0,p00 		; x0 * h0
		MPY .M1X x1,h0,p10		; x1 * h0
		ADD .L1	p00,sum0,sum0 	; sum0 += x0 * h0
		ADD .L2X p10,sum1,sum1 	; sum1 += x1 * h0

		LDH .D1	*x++[2],x0		; x0 = x[j+i+2]
		LDH	.D2	*h_1++[2],h1 	; h1 = h[i+1]
		MPY	.M2	x1,h1,p01		; x1 * h1
		MPY	.M2X x0,h1,p11		; x0 * h1
		ADD .L1X p01,sum0,sum0 	; sum0 += x1 * h1
		ADD	.L2	p11,sum1,sum1 	; sum1 += x0 * h1
		[ctr] SUB	.S2	ctr,1,ctr	; decrement loop counter
		[ctr] B .S2	LOOP ; branch to loop
		SHR	sum0,15,sum0		; sum0 >> 15
		SHR	sum1,15,sum1		; sum1 >> 15
		STH	sum0,*y++			; y[j] = sum0 >> 15
		STH	sum1,*y++			; y[j+1] = sum1 >> 15
		SUB	x,rstx,x			; reset x pointer to x[j]
		SUB	h_1,rsth,h_1		; reset h pointer to h[0]
		[octr] B	OUTLOOP			; branch to outer loop

		.endproc

2. 在main.c中extern，观察第一行知道这个函数叫做_fir
   所以在main.c环境里这么写

extern void _fir(short *x, short *h, short *y);

3. 然后在main函数里正常调用使用即可

	_fir(x,b,y);