1 /*
2 * SPDX-FileCopyrightText: Copyright 2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 *
6 * Licensed under the Apache License, Version 2.0 (the License); you may
7 * not use this file except in_q7x4 compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in_q7x4 writing, software
13 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
14 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18
19 /* ----------------------------------------------------------------------
20 * Project: CMSIS NN Library
21 * Title: arm_s8_to_s16_unordered_with_offset.c
22 * Description: Converts the elements of the S8 vector to S16 vector with an added offset
23 *
24 * $Date: 23 Mars 2023
25 * $Revision: V.1.0.0
26 *
27 * Target : Arm(R) M-Profile Architecture
28 *
29 * -------------------------------------------------------------------- */
30
31 #include "arm_nnsupportfunctions.h"
32
33 /**
34 * @ingroup groupSupport
35 */
36
37 /**
38 * @addtogroup supportConversion
39 * @{
40 */
41 #if defined(ARM_MATH_DSP)
arm_s8_to_s16_unordered_with_offset(const int8_t * src,int16_t * dst,int32_t block_size,int16_t offset)42 void arm_s8_to_s16_unordered_with_offset(const int8_t *src, int16_t *dst, int32_t block_size, int16_t offset)
43 {
44 int32_t in_s8x4;
45 int32_t in_s16x2_1;
46 int32_t in_s16x2_2;
47 int32_t block_cnt = block_size >> 2;
48
49 /* Compute 4 outputs at a time. */
50 const int32_t offset_s16x2 = PKHBT(offset, offset, 16);
51 while (block_cnt > 0)
52 {
53 in_s8x4 = arm_nn_read_s8x4_ia(&src);
54
55 in_s16x2_1 = SXTAB16(offset_s16x2, in_s8x4);
56 in_s16x2_2 = SXTAB16(offset_s16x2, ROR(in_s8x4, 8));
57
58 arm_nn_write_q15x2_ia(&dst, in_s16x2_1);
59 arm_nn_write_q15x2_ia(&dst, in_s16x2_2);
60
61 block_cnt--;
62 }
63
64 /* Handle left over samples. */
65 block_cnt = block_size % 4;
66 while (block_cnt > 0)
67 {
68 *dst++ = (int16_t)*src++ + offset;
69 block_cnt--;
70 }
71 }
72 #endif
73
74 /**
75 * @} end of Doxygen group
76 */
77
