fir_cplx_blk_test.asm

开发环境为visual dsp++3.0的复数FIR滤波器源码

/**************************************************************

File Name:	fir_cplx_blk_test.asm
		
Date Modified:	2/17/99	RFG

Purpose:	Program to call fir_cplx_blk.asm

**************************************************************/

#include    "def21160.h"

#define     TAPS    8
#define     N      48

.extern fir_cplx_blk;

/* DM data */
.section/dm seg_dmda;
.ALIGN 2;
.var    DELAYLINE[2*TAPS];
.ALIGN 2;
.var    INPUT[2*N] = "input.dat";


/* PM long-word data */
.section/dm seg_pm64;
.ALIGN 2;
.var    OUTPUT[2*N+2];  /* the extra word at the beginning of the */
                        /* output buffer allows an optimization in the outer */
                        /* loop of the kernel -- the write of the previously */
                        /* computed real/imag output samples is done at the */
                        /* top of the outer loop rather than at the bottom. */
                        /* this allows a dual parallel move and saves 1 cycle */


/* PM data */
.section/dm seg_pmda;
.ALIGN 2;
.var    COEFADR[2*TAPS] = "cfircoeffs.dat";


/* PM interrupt vector code */
.section/pm   seg_rth;
Reserved_1:     rti; nop; nop; nop;
Chip_Reset:     idle; jump start; nop; nop;


/* program memory code */
.section/pm seg_pmco;

/* Initialization code */
start:
      b0 = DELAYLINE;
      l0 = @DELAYLINE;
	  
	  r0 = b0;
	  r0 = lshift r0 by -1;
	  
	  b1 = r0;                    /* Set a pointer to the DELAYLINE in Long-word space */
	  l1 = @DELAYLINE/2;          /* to do a dual data, SIMD, Long-word access. */

	  b6 = INPUT;
	  l6=0;
	  
	  b8 = COEFADR;
	  l8 = @COEFADR;

	  b9 = OUTPUT;
	  l9 = @OUTPUT;
	
	  m1 = 2;     
      m3 = -1;
	  m4 = -2;
	  
	  m9 = 2;
	  m10 = 1;
	  
	  r1 = TAPS;
	  
	  call fir_cplx_blk (db);
	  r2 = N;
	  r3 = TAPS-2;

/* Terminate and wait */
wait1:   jump wait1;