Commit 53a1ac93 authored by Satish Patil's avatar Satish Patil
Browse files

Update BASOP_Util_Divide3232_Scale_cadence() with additional parameter - bits

parent 7b212b76

lib_com/basop_util.c

+104 −0
Original line number Diff line number Diff line
@@ -958,6 +958,55 @@ Word16 BASOP_Util_Divide3232_uu_1616_Scale( Word32 x, Word32 y, Word16 *s ) 
    return ( z );

}



#ifdef DIV32_OPT

Word32 div_w( Word32 L_num, Word32 L_den, Word16 bits )

{

    Word32 L_var_out = 0;

    Word16 iteration;

    move32();





    IF( L_den == 0 )

    {

        /* printf("Division by 0 in div_l, Fatal error in "); printStack(); */

        return ( 0 );

    }



    test();

    IF( ( L_num < 0 ) || ( L_den < 0 ) )

    {

        /* printf("Division Error in div_l, Fatal error in "); printStack(); */

        return ( 0 );

    }

    Word64 W_num, W_den;

    W_num = W_deposit32_l( L_num );

    W_den = W_deposit32_l( L_den );



    IF( GT_64( W_num, W_den ) )

    {

        return MAX_32;

    }

    ELSE

    {

        W_num = W_shr( W_num, 1 );

        W_den = W_shr( W_den, 1 );



        FOR( iteration = 0; iteration < bits; iteration++ )

        {

            L_var_out = L_shl( L_var_out, 1 );

            W_num = W_shl( W_num, 1 );



            IF( GT_64( W_num, W_den ) )

            {

                W_num = W_sub( W_num, W_den );

                L_var_out = L_add( L_var_out, 1 );

            }

        }



        return L_shl(L_var_out, 31-bits);

    }

}

#else /*  DIV32_OPT */

Word32 div_w( Word32 L_num, Word32 L_den )

{

    Word32 L_var_out = 0;
@@ -1005,7 +1054,9 @@ Word32 div_w( Word32 L_num, Word32 L_den ) 
        return L_var_out;

    }

}

#endif /*  DIV32_OPT */



#ifndef DIV32_OPT

Word32 BASOP_Util_Divide3232_Scale_cadence( Word32 x, Word32 y, Word16 *s )

{

    Word32 z;
@@ -1057,6 +1108,59 @@ Word32 BASOP_Util_Divide3232_Scale_cadence( Word32 x, Word32 y, Word16 *s ) 


    return z;

}

#else /*  DIV32_OPT */

Word32 BASOP_Util_Divide3232_Scale_cadence( Word32 x, Word32 y, Word16 *s, Word16 bits )

{

    Word32 z;

    Word16 sx;

    Word16 sy;

    Word32 sign;



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

    assert( y != (Word32) 0 );



    sign = 0;

    move16();



    IF( x < 0 )

    {

        x = L_negate( x );

        sign = L_xor( sign, 1 );

    }



    IF( y < 0 )

    {

        y = L_negate( y );

        sign = L_xor( sign, 1 );

    }



    IF( x == (Word32) 0 )

    {

        *s = 0;

        return ( (Word32) 0 );

    }



    sx = norm_l( x );

    x = L_shl( x, sx );

    x = L_shr( x, 1 );

    move16();

    *s = sub( 1, sx );



    sy = norm_l( y );

    y = L_shl( y, sy );

    move16();

    *s = add( *s, sy );



    z = div_w( x, y);



    if ( sign != 0 )

    {

        z = L_negate( z );

    }



    return z;

}

#endif /*  DIV32_OPT */



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

{

lib_com/basop_util.h

+7 −0
Original line number Diff line number Diff line
@@ -328,9 +328,16 @@ Word16 BASOP_Util_Divide3232_Scale( Word32 x, /*!< i : Numerator*/ 
                                    Word32 y,    /*!< i  : Denominator*/

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



#ifdef DIV32_OPT

Word32 BASOP_Util_Divide3232_Scale_cadence( Word32 x,      /*!< i  : Numerator*/

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

                                            Word16 *s,     /*!< o  : Additional scalefactor difference*/

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

#else /*  DIV32_OPT */

Word32 BASOP_Util_Divide3232_Scale_cadence( Word32 x,    /*!< i  : Numerator*/

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

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

#endif /*  DIV32_OPT */





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