cgs.expr

Cadence SPW 4.8.2下3780点FFT的源码

/****************************************************************/
/*
/*      Expression file for chip coding
/*      Block Function: 3780fft
/*      Library: ronghe
/*      Date: 07/25/03 10:17:44
/*
/*      You may make modifications to this file where there are braces:
/*      @INCLUDE_FILES: {<add include files>}
/*      @INCLUDE_DIRS: {<add include directories>}
/*      @LINK_TO: {<add files to be linked with this one>}
/*      @PARAMETER_DECLARATIONS: {<delete unneeded declarations>}
/*      @STATE_DECLARATIONS: {<add declarations for state variables>}
/*      @BLOCK_DECLARATIONS: {<add declarations for block variables>}
/*      @INITIALIZATION_CODE: @RUN_OUT_CODE: @RUN_IN_CODE:
/*      @RUN_CONTROL_CODE: @TERMINATION_CODE:
/*         {<add appropriate sections of code>}
/****************************************************************/


@FEED_THROUGH_TYPE: ALL_FEED_THROUGH

@INCLUDE_FILES: {"/home/huhao/a_dtv_756/a_dtv/top.h" }

@INCLUDE_DIRS: { }

@LINK_TO: {"/home/huhao/a_dtv_756/a_dtv/dmbtlib.a"  }

@INPUT_DECLARATIONS:
  Ovector   	I_in;

@OUTPUT_DECLARATIONS:
  Ovector   	O_out;

@PARAMETER_DECLARATIONS:
{
}
@STATE_DECLARATIONS:
{
	SCMPLX temp_in[3780];
	SCMPLX temp_out[3780];
}

@BLOCK_DECLARATIONS:
{
}

@INITIALIZATION_CODE:
{

}

@RUN_OUT_CODE:
{
	{
		int i;
		Double *in_ptr = (Double *)OvGetVirtStart(I_in);
		Double *out_ptr = (Double *)OvGetVirtStart(O_out);
		
		for(i=0;i<3780;i++)
		{
			temp_in[i].re = (short)(in_ptr[2*i]);
			temp_in[i].im = (short)(in_ptr[2*i+1]);
		}

/*		for(i=0;i<3780;i++)
		{
			temp_in[i].re = (i%7);
			temp_in[i].im = 0;
		}
*/

		
		tx_ifft_top(temp_in, temp_out);

		for(i=0;i<3780;i++)
		{
			out_ptr[2*i] = (double)(temp_out[i].re*3780);
			out_ptr[2*i+1] = (double)((-1)*temp_out[i].im*3780);
		}
	}
}

@TERMINATION_CODE:
{
}