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
Shift_Sat_v32xv32(const LVM_INT16 val,const LVM_INT32 * src,LVM_INT32 * dst,LVM_INT16 n)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