diff --git a/lib_com/basop_util.c b/lib_com/basop_util.c
index 3a0a72bc3ababc4701b9d9bc3a73b30066dec337..16e9ad99f443a7247226cd48f85f7aeba6cd9eb9 100644
--- a/lib_com/basop_util.c
+++ b/lib_com/basop_util.c
@@ -2565,6 +2565,54 @@ Word16 BASOP_Util_Cmp_Mant32Exp /*!< o: flag: result of comparison */
      headroom is introduced into acc
 */
 
+#if 1
+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;
+}
+#else
 #ifdef OPT_2146_BASOP_UTIL_ADD_MANT32EXP
 Word32 BASOP_Util_Add_Mant32Exp /* o  : normalized result mantissa */
     ( Word32 a_m,               /* i  : Mantissa of 1st operand a  */
@@ -2630,6 +2678,7 @@ Word32 BASOP_Util_Add_Mant32Exp /* o  : normalized result mantissa */
     return ( a_m );
 }
 #else
+
 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  */
@@ -2688,6 +2737,7 @@ Word32 BASOP_Util_Add_Mant32Exp /* o  : normalized result mantissa */
     return ( L_tmp );
 }
 #endif
+#endif
 
 static const Word16 shift_lc[] = { 9, 10 };