Tal, thank you very much for your quick reply. This is my codes. In the main.c : sync_catch(signal_rx,CHUNK_LEN/3*2.1, paras,&g_fo,&g_timing_pos,&g_cell_id,debug_enable) In the sync_catch.c: decimate_sync(signal_rx_d, signal_rx, sigal_len, decimate_rate); In the dsp_sync.c: void decimate_sync(complex_i *y, complex_i *x, size_t xlen, int r) the decimate sync part is the code I want to analyze.And I place the marks in it. Is it available?

#include

#include

#include

#include "iacaMarks.h"

typedef float complex_f[2];

typedef short complex_i[2];

typedef int complex_i32[2];

void decimate_sync(complex_i *y, complex_i *x, size_t xlen, int r)

{

static short b[9]={16384,32767,16384,16384,32767,16384,16384,32767,16384};

static short a[9]={16384,-27217,13310,16384,-23414,9160,16384,-21666,7253};

static short g[3]={1238,1065,986};

complex_i32 px[9],py[9];

complex_i32 iir_out[xlen];

memset(px, 0, sizeof(complex_i32) *9);

memset(py, 0, sizeof(complex_i32) *9);

int di=10,iy=0;

for(int k=0;k

{

IACA_START

px[0][0]=x[k][0];

px[0][1]=x[k][1];

iir_out[k][0]=((px[0][0])*(b[0])>>14);

iir_out[k][1]=((px[0][1])*(b[0])>>14);

for(int i=1;i<=2;i++)

{

iir_out[k][0]+=((px[i][0]*b[i])>>14)-(a[i]*py[i][0]>>14);

iir_out[k][1]+=((px[i][1]*b[i])>>14)-(a[i]*py[i][1]>>14);

}

for(int i=2;i>0;i--)

{

px[i][0]=px[i-1][0];

px[i][1]=px[i-1][1];

}

py[2][0]=py[1][0];

py[2][1]=py[1][1];

py[1][0]=iir_out[k][0];

py[1][1]=iir_out[k][1];

px[3][0]=py[1][0]*g[0]>>15;

px[3][1]=py[1][1]*g[0]>>15;

iir_out[k][0]=((px[3][0])*(b[3])>>14);

iir_out[k][1]=((px[3][1])*(b[3])>>14);

for(int i=1;i<=2;i++)

{

iir_out[k][0]+=((px[3+i][0]*b[3+i])>>14)-(a[3+i]*py[3+i][0]>>14);

iir_out[k][1]+=((px[3+i][1]*b[3+i])>>14)-(a[3+i]*py[3+i][1]>>14);

}

for(int i=5;i>=4;i--)

{

px[i][0]=px[i-1][0];

px[i][1]=px[i-1][1];

}

py[5][0]=py[4][0];

py[5][1]=py[4][1];

py[4][0]=iir_out[k][0];

py[4][1]=iir_out[k][1];

px[6][0]=py[4][0]*g[1]>>15;

px[6][1]=py[4][1]*g[1]>>15;

iir_out[k][0]=((px[6][0])*(b[6])>>14);

iir_out[k][1]=((px[6][1])*(b[6])>>14);

for(int i=1;i<=2;i++)

{

iir_out[k][0]+=((px[6+i][0]*b[6+i])>>14)-(a[6+i]*py[6+i][0]>>14);

iir_out[k][1]+=((px[6+i][1]*b[6+i])>>14)-(a[6+i]*py[6+i][1]>>14);

}

for(int i=8;i>=7;i--)

{

px[i][0]=px[i-1][0];

px[i][1]=px[i-1][1];

}

py[8][0]=py[7][0];

py[8][1]=py[7][1];

py[7][0]=iir_out[k][0];

py[7][1]=iir_out[k][1];

if ( (k-di)>=0 && (k-di)%r==0)

{

y[iy][0] = iir_out[k][0]*(0.030094146728515625)+0.5;

y[iy][1] = iir_out[k][1]*(0.030094146728515625)+0.5;

iy++;

}

}//the end of loop

IACA_END

}

void main()

{

complex_i x[10]={{1,1},{1,1},{1,1},{1,1},{1,1},{1,1},{1,1},{1,1},{1,1},{1,1}};

int xlen=10;

int r=4;

complex_i y[10];

decimate_sync(y,x,xlen,r);

printf("%d,%d",y[1][0],y[1][1]);

}

I want to analyze the code in the loop.Where is the right place?

What's more,when I add the marks,the gdb says:"Program received signal SIGILL, Illegal instruction."

Thanks!

Thank you very much . I do as what you do and I get the analysis now. I found the way I compile is wrong. And now I can continue my job. Thank you for your help again.