Commit a8664303 authored by Fabian Bauer's avatar Fabian Bauer
Browse files

added faster method

parent b8a8f1cb

lib_com/tools_fx.c

+20 −3
Original line number Diff line number Diff line
@@ -1230,6 +1230,11 @@ Word16 maximum_exp_fx( /* o : index of the maximum value 
    scale = sub( norm_s( vec_fx[ind] ), 1 );

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

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

#if 1

    static int cnt = 0;

    cnt++;

#endif





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

    {
@@ -1243,7 +1248,7 @@ Word16 maximum_exp_fx( /* o : index of the maximum value 
        }

    }





    //printf( "\nind = %d", ind );

    return ind;

}

#elif 1
@@ -1251,17 +1256,29 @@ Word16 maximum_exp_fx( /* o : index of the maximum value 
    Word16 j, ind;

    ind = 0;

    move16();

#if 1

    static int cnt = 0;

    cnt++;

#endif





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

    {

#if 0

        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] ) ) ) )

#else

        /* if(vec[j] > vec[ind])                                                                                                    //means   */

        /* if( GT_32(    L_shr_sat( L_deposit_l(  vec_fx[j] ) ),  sub( exp_vec[ind], exp_vec[j] )  , L_deposit_l( vec_fx[ind] )))   //is like */

        if ( L_mac0_sat( L_shr_sat( L_mult0( vec_fx[j], 0x0001 ), sub( exp_vec[ind], exp_vec[j] ) ), vec_fx[ind], -0x0001 ) > 0 )

#endif

        {

            ind = j;

            move16();

        }

    }



   }



    //printf( "\n%d:ind = %d", cnt, ind );

    return ind;

}

#else
@@ -1288,7 +1305,7 @@ Word16 maximum_exp_fx( /* o : index of the maximum value 
        }

    }





    // printf( "\nind = %d", ind );

    return ind;

}

#endif