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
