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      1 /*
      2  * Copyright (C) 2004-2010 NXP Software
      3  * Copyright (C) 2010 The Android Open Source Project
      4  *
      5  * Licensed under the Apache License, Version 2.0 (the "License");
      6  * you may not use this file except in compliance with the License.
      7  * You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  * Unless required by applicable law or agreed to in writing, software
     12  * distributed under the License is distributed on an "AS IS" BASIS,
     13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  * See the License for the specific language governing permissions and
     15  * limitations under the License.
     16  */
     17 
     18 /**********************************************************************************
     19    INCLUDE FILES
     20 ***********************************************************************************/
     21 
     22 #include "VectorArithmetic.h"
     23 
     24 /**********************************************************************************
     25    FUNCTION Shift_Sat_v16xv16
     26 ***********************************************************************************/
     27 
     28 void Shift_Sat_v16xv16 (const   LVM_INT16   val,
     29                         const   LVM_INT16   *src,
     30                         LVM_INT16   *dst,
     31                         LVM_INT16   n)
     32 {
     33     LVM_INT32   temp;
     34     LVM_INT32   ii;
     35     LVM_INT16   RShift;
     36     if(val>0)
     37     {
     38         for (ii = n; ii != 0; ii--)
     39         {
     40             temp = (LVM_INT32)*src;
     41             src++;
     42 
     43             temp = temp << val;
     44 
     45             if (temp > 0x00007FFF)
     46             {
     47                 *dst = 0x7FFF;
     48             }
     49             else if (temp < -0x00008000)
     50             {
     51                 *dst = - 0x8000;
     52             }
     53             else
     54             {
     55                 *dst = (LVM_INT16)temp;
     56             }
     57             dst++;
     58         }
     59     }
     60     else if(val<0)
     61     {
     62         RShift=(LVM_INT16)(-val);
     63 
     64         for (ii = n; ii != 0; ii--)
     65         {
     66             *dst = (LVM_INT16)(*src >> RShift);
     67             dst++;
     68             src++;
     69         }
     70     }
     71     else
     72     {
     73         if(src!=dst)
     74         {
     75             Copy_16(src,dst,n);
     76         }
     77     }
     78     return;
     79 }
     80 
     81 /**********************************************************************************/
     82