Commit 3a0cffad authored by Fabian Bauer's avatar Fabian Bauer Committed by Manuel Jander
Browse files

add modified version of division '1/x'

parent 69673ab7

lib_com/basop_util.c

+35 −0
Original line number Diff line number Diff line
@@ -1066,6 +1066,41 @@ Word32 BASOP_Util_Divide3232_Scale_cadence( Word32 x, Word32 y, Word16 *s ) 
    return z;

}



/*1bit HR in x > 0*/

Word32 BASOP_Util_Divide3232_Scale_cadence_1( Word32 x, Word32 y, Word16 *s )

{

    Word32 z;

    //Word16 sx;

    Word16 sy;

    Word32 sign;



    /* assert (x >= (Word32)0); */

    assert( y != (Word32) 0 );



    sign = 0;

    move16();



    IF( y < 0 )

    {

        y = L_negate( y );

        sign = L_xor( sign, 1 );

    }



    sy = norm_l( y );

    y = L_shl( y, sy );

    move16();

    *s = add( 0, sy );

    move16();



    z = div_w( x, y );



    if ( sign != 0 )

    {

        z = L_negate( z );

    }

    return z;



}

Word16 BASOP_Util_Divide3232_Scale( Word32 x, Word32 y, Word16 *s )

{

    Word16 z;

lib_com/basop_util.h

+4 −0
Original line number Diff line number Diff line
@@ -332,6 +332,10 @@ Word32 BASOP_Util_Divide3232_Scale_cadence( Word32 x, /*!< i : Numerator*/ 
                                            Word32 y,    /*!< i  : Denominator*/

                                            Word16 *s ); /*!< o  : Additional scalefactor difference*/



Word32 BASOP_Util_Divide3232_Scale_cadence_1( Word32 x,    /*!< i  : Numerator*/

                                            Word32 y,    /*!< i  : Denominator*/



                                            Word16 *s ); /*!< o  : Additional scalefactor difference*/



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

/*!