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1 /* ----------------------------------------------------------------------
4  * Description:  Mean value of a Q15 vector
9  * Target Processor: Cortex-M and Cortex-A cores
10  * -------------------------------------------------------------------- */
12  * Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved.
14  * SPDX-License-Identifier: Apache-2.0
18  * You may obtain a copy of the License at
20  * www.apache.org/licenses/LICENSE-2.0
41   @brief         Mean value of a Q15 vector.
47                    The function is implemented using a 32-bit internal accumulator.
48                    The input is represented in 1.15 format and is accumulated in a 32-bit
52                    Finally, the accumulator is truncated to yield a result of 1.15 format.
65     /* Compute 8 outputs at a time */  in arm_mean_q15()
75         blkCnt--;  in arm_mean_q15()
84        /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */  in arm_mean_q15()
88        blkCnt--;  in arm_mean_q15()
91     /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) / blockSize  */  in arm_mean_q15()
110   /* Loop unrolling: Compute 4 outputs at a time */  in arm_mean_q15()
115     /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */  in arm_mean_q15()
125     blkCnt--;  in arm_mean_q15()
140     /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) */  in arm_mean_q15()
144     blkCnt--;  in arm_mean_q15()
147   /* C = (A[0] + A[1] + A[2] + ... + A[blockSize-1]) / blockSize  */  in arm_mean_q15()