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_v32xv32 26 ***********************************************************************************/ 27 28 void Shift_Sat_v32xv32 (const LVM_INT16 val, 29 const LVM_INT32 *src, 30 LVM_INT32 *dst, 31 LVM_INT16 n) 32 { 33 LVM_INT32 ii; 34 LVM_INT16 RShift; 35 36 if(val>0) 37 { 38 LVM_INT32 a,b; 39 40 for (ii = n; ii != 0; ii--) 41 { 42 a=*src; 43 src++; 44 45 b=(a<<val); 46 47 if( (b>>val) != a ) /* if overflow occured, right shift will show difference*/ 48 { 49 if(a<0) 50 { 51 b=0x80000000l; 52 } 53 else 54 { 55 b=0x7FFFFFFFl; 56 } 57 } 58 59 *dst = b; 60 dst++; 61 } 62 } 63 else if(val<0) 64 { 65 RShift=(LVM_INT16)(-val); 66 for (ii = n; ii != 0; ii--) 67 { 68 *dst = (*src >> RShift); 69 dst++; 70 src++; 71 } 72 } 73 else 74 { 75 if(src!=dst) 76 { 77 Copy_16((LVM_INT16 *)src,(LVM_INT16 *)dst,(LVM_INT16)(n<<1)); 78 } 79 } 80 return; 81 } 82 83 /**********************************************************************************/ 84
