Commit 32bba36d authored by Fabian Bauer's avatar Fabian Bauer
Browse files

add FIX_1439_SPEEDUP_Copy_Scale_sig_16_32_no_sat

parent be68a0d9

lib_com/options.h

+4 −0
Original line number Diff line number Diff line
@@ -80,4 +80,8 @@ 
#define HARM_PUSH_BIT

#define HARM_ENC_INIT

//#define HARM_SCE_INIT

// 

// new speedups

#define FIX_1439_SPEEDUP_Copy_Scale_sig_16_32_no_sat            /*FhG: reduces WMOPS - bit-exact*/ //   |



#endif

lib_com/tools_fx.c

+25 −1
Original line number Diff line number Diff line
@@ -794,14 +794,38 @@ void Copy_Scale_sig_16_32_no_sat( 
        }

        return;

    }

#ifdef FIX_1439_SPEEDUP_Copy_Scale_sig_16_32_no_sat

    L_tmp = L_shl_o( 1, exp0 - 1, &Overflow );



    IF( L_tmp >= 0x7FFF )

    {

        FOR( i = 0; i < lg; i++ )

        {

            // y[i] = L_mult0(x[i], L_tmp);

            y[i] = W_extract_l( W_mult_32_16( L_tmp, x[i] ) );

        move32(); /* saturation can occur here */

            move32(); /* Overflow can occur here */

        }

        return;

    }

    // ELSE

    {

        Word16 tmp = extract_l( L_tmp );

        FOR( i = 0; i < lg; i++ )

        {

            y[i] = L_mult( x[i], tmp );

            move32();

        }

    }

#else

    L_tmp = L_shl_o( 1, exp0 - 1, &Overflow );

    FOR( i = 0; i < lg; i++ )

    {

        // y[i] = L_mult0(x[i], L_tmp);

        y[i] = W_extract_l( W_mult_32_16( L_tmp, x[i] ) );

        move32(); /* Overflow can occur here */

    }

#endif

}



void Copy_Scale_sig_32_16(

    const Word32 x[], /* i  : signal to scale input           Qx        */