Commit b13f5d51 authored by Fabian Bauer's avatar Fabian Bauer
Browse files

add new fix: cheaper

parent e043963a

lib_com/tools_fx.c

+47 −9
Original line number Diff line number Diff line
@@ -1219,23 +1219,17 @@ Word16 maximum_exp_fx( /* o : index of the maximum value 
                       const Word16 *exp_vec, /* i  : exponents of input vector                      */

                       const Word16 lvec_fx   /* i  : length of input vector                         */

)

#ifdef FIX_1981_MAXIMUM_EXP_FX_

{

    Word16 j, ind;

    Word16 tmp, exp;

    ind = 0;

    move16();

#ifndef FIX_1981_MAXIMUM_EXP_FX

    tmp = vec_fx[0];

    move16();

    exp = exp_vec[0];

    move16();

#else

    Word16 scale;



    scale = sub( norm_s( vec_fx[ind] ), 1 );

    tmp = shl( vec_fx[ind], scale );

    exp = sub( exp_vec[ind], scale );

#endif



    FOR( j = 1; j < lvec_fx; j++ )

    {
@@ -1243,22 +1237,66 @@ Word16 maximum_exp_fx( /* o : index of the maximum value 
        {

            ind = j;

            move16();

#ifdef FIX_1981_MAXIMUM_EXP_FX

            scale = sub( norm_s( vec_fx[ind] ), 1 );

            tmp = shl( vec_fx[ind], scale );

            exp = sub( exp_vec[ind], scale );

        }

    }





    return ind;

}

#elif 1

{

    Word16 j, ind;

    Word16 tmp, exp;

    ind = 0;

    move16();

    tmp = vec_fx[0];

    move16();

    exp = exp_vec[0];

    move16();



    FOR( j = 1; j < lvec_fx; j++ )

    {

        if( LT_32( L_deposit_l(vec_fx[ind]), L_shr_sat( L_deposit_l(vec_fx[j]), sub( exp_vec[ind], exp_vec[j] ) ) ) )

        {

            ind = j;

            move16();

        }

    }





    return ind;

}

#else

{

    Word16 j, ind;

    Word16 tmp, exp;

    ind = 0;

    move16();

    tmp = vec_fx[0];

    move16();

    exp = exp_vec[0];

    move16();



    FOR( j = 1; j < lvec_fx; j++ )

    {

        IF( LT_16( tmp, shr_sat( vec_fx[j], sub( exp, exp_vec[j] ) ) ) )

        {

            ind = j;

            move16();

            tmp = vec_fx[j];

            move16();

            exp = exp_vec[j];

            move16();

#endif

        }

    }





    return ind;

}

#endif



/*---------------------------------------------------------------------*

 * maximum_abs_16_fx()