source: svn/trunk/newcon3bcm2_21bu/dta/src/settop_api/avl_dspfunc.h

/* $Id: dspfunc.h 1.4 2006/12/14 18:07:15 rzopf Exp $ */
/*****************************************************************************
  Copyright 2004 Broadcom Corp.  All Rights Reserved.

  $Log: dspfunc.h $
  Revision 1.4  2006/12/14 18:07:15  rzopf
  *** empty log message ***

  Revision 1.3  2006/02/28 21:35:23  rzopf
  modified frame size related code to use a variable instead of a constant.

  Revision 1.2  2006/02/27 21:02:12  rzopf
  Replaced short and long data types with Word16 and WOrd32.

  Revision 1.1  2006/02/24 18:30:47  rzopf
  Initial Version.


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

#ifndef __AVL_DSPFUNC_H__
#define __AVL_DSPFUNC_H__

#define EXTRACT_HI(x) (x>>16)
#define EXTRACT_LO(x) ((x-((x>>16)<<16))>>1)
#define MPY_32_16(x32, y16) (((EXTRACT_HI(x32)*((Word32)y16))+((EXTRACT_LO(x32)*((Word32)y16))>>15))<<1)

typedef long Word32;
typedef long Word16;

Word32 bvxx_Pow2(   /* (o) Q0  : result       (range: 0<=val<=0x7fffffff) */
  Word16 exponent,  /* (i) Q0  : Integer part.      (range: 0<=val<=30)   */
  Word16 fraction   /* (i) Q15 : Fractional part.   (range: 0.0<=val<1.0) */
);

void bvxx_Log2(
  Word32 L_x,       /* (i) Q0 : input value                                 */
  Word16 *exponent, /* (o) Q0 : Integer part of Log2.   (range: 0<=val<=30) */
  Word16 *fraction  /* (o) Q15: Fractional  part of Log2. (range: 0<=val<1) */
);

void CalcPower(short *inbuf, Word32 *power, Word32 *shift, Word32 frsz);
Word16 Norm(Word32 in);
Word16 Norm16(Word16 in);

Word16 div_s (Word16 var1, Word16 var2);
Word16 imod(Word16 a, Word16 b, Word16 *dividend);

#endif /* __DSPFUNC_H__ */