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 ***********************************************************************************/
Shift_Sat_Float(const LVM_INT16 val,const LVM_FLOAT * src,LVM_FLOAT * dst,LVM_INT16 n)27 void Shift_Sat_Float(const LVM_INT16 val, const LVM_FLOAT* src, LVM_FLOAT* dst, LVM_INT16 n) {
28 LVM_FLOAT temp;
29 LVM_INT32 ii, ij;
30 LVM_INT16 RShift;
31
32 if (val > 0) {
33 for (ii = n; ii != 0; ii--) {
34 temp = (LVM_FLOAT)*src;
35 src++;
36 for (ij = 0; ij < val; ij++) {
37 temp = temp * 2;
38 }
39
40 if (temp > 1.0) temp = 1.0;
41 if (temp < -1.0) temp = -1.0;
42
43 *dst = (LVM_FLOAT)temp;
44 dst++;
45 }
46 } else if (val < 0) {
47 RShift = (LVM_INT16)(-val);
48
49 for (ii = n; ii != 0; ii--) {
50 temp = (LVM_FLOAT)*src;
51 src++;
52 for (ij = 0; ij < RShift; ij++) {
53 temp = temp / 2;
54 }
55 *dst = (LVM_FLOAT)temp;
56 dst++;
57 }
58 } else {
59 if (src != dst) {
60 Copy_Float(src, dst, n);
61 }
62 }
63 return;
64 }
65 /**********************************************************************************/
66