diff --git a/lib_com/basop_util.c b/lib_com/basop_util.c
index 1dc21c5f1129c6dd2ced14614acff4d7e3e2e543..43dcf5417555cfa261ffe549e1bcb42f993228fb 100644
--- a/lib_com/basop_util.c
+++ b/lib_com/basop_util.c
@@ -2512,6 +2512,7 @@ Word16 BASOP_Util_Cmp_Mant32Exp /*!< o: flag: result of comparison */
      headroom is introduced into acc
 */
 
+#ifndef ISSUE_2247_Accelerate_AddMant32Exp
 Word32 BASOP_Util_Add_Mant32Exp /* o  : normalized result mantissa */
     ( Word32 a_m,               /* i  : Mantissa of 1st operand a  */
       Word16 a_e,               /* i  : Exponent of 1st operand a  */
@@ -2575,6 +2576,7 @@ Word32 BASOP_Util_Add_Mant32Exp /* o  : normalized result mantissa */
 
     return ( a_m );
 }
+#endif
 
 static const Word16 shift_lc[] = { 9, 10 };
 
diff --git a/lib_com/basop_util.h b/lib_com/basop_util.h
index cbd7838655e95b97380107cd4144c756ad1f2b3e..035dc927ea75af59981db3050240c2555926780e 100644
--- a/lib_com/basop_util.h
+++ b/lib_com/basop_util.h
@@ -59,6 +59,56 @@
 #define CHEAP_NORM_SIZE 161
 #endif
 
+#ifdef ISSUE_2247_Accelerate_AddMant32Exp
+static __inline Word32 BASOP_Util_Add_Mant32Exp(
+    Word32 Mant1,
+    Word16 exp1,
+    Word32 Mant2,
+    Word16 exp2,
+    Word16 *exp_res )
+{
+
+    Word32 tmp1, tmp2, tmp_res;
+    Word16 scale_tmp, scale_tmp2, scale_tmp3;
+
+
+    if ( Mant1 == 0 )
+    {
+        exp1 = exp2;
+        move16();
+    }
+
+    if ( Mant2 == 0 )
+    {
+        exp2 = exp1;
+        move16();
+    }
+
+    scale_tmp = add( s_max( exp2, exp1 ), 1 );
+    tmp1 = L_shl( Mant1, sub( exp1, scale_tmp ) );
+
+    tmp2 = L_shl( Mant2, sub( exp2, scale_tmp ) );
+    tmp_res = L_add( tmp1, tmp2 );
+
+    scale_tmp2 = norm_l( tmp_res );
+    tmp_res = L_shl( tmp_res, scale_tmp2 );
+
+    scale_tmp3 = 0;
+    move16();
+
+    if ( tmp_res != 0 )
+    {
+        scale_tmp3 = sub( scale_tmp, scale_tmp2 );
+    }
+
+    *exp_res = scale_tmp3;
+    move16();
+
+    return tmp_res;
+}
+
+#endif
+
 static __inline Word16 limitScale16( Word16 s )
 {
     /* It is assumed, that s is calculated just before, therefore we can switch upon sign */
diff --git a/lib_com/options.h b/lib_com/options.h
index 1a7b596d5309b846680d83f511711c50f1bc7674..6a611a703b844cf9da41efe7913680979781acee 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -85,6 +85,7 @@
 #define TMP_1342_WORKAROUND_DEC_FLUSH_BROKEN_IN_SR      /* FhG: Temporary workaround for incorrect implementation of decoder flush with split rendering */
 #define NONBE_1122_KEEP_EVS_MODE_UNCHANGED              /* FhG: Disables fix for issue 1122 in EVS mode to keep BE tests green. This switch should be removed once the 1122 fix is added to EVS via a CR.  */
 #define FIX_1435_MOVE_STEREO_PANNING                    /* VA: issue 1435: do the EVS stereo panning in the renderer */
+#define ISSUE_2247_Accelerate_AddMant32Exp              /* FhG: inline and acelerate Heavily used BASOP_Util_AddMant32Exp */
 
 
 /* #################### End BE switches ################################## */