151 lines
4.7 KiB
C
151 lines
4.7 KiB
C
/* ----------------------------------------------------------------------
|
|
* Project: CMSIS DSP Library
|
|
* Title: arm_mat_add_q15.c
|
|
* Description: Q15 matrix addition
|
|
*
|
|
* $Date: 27. January 2017
|
|
* $Revision: V.1.5.1
|
|
*
|
|
* Target Processor: Cortex-M cores
|
|
* -------------------------------------------------------------------- */
|
|
/*
|
|
* Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the License); you may
|
|
* not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include "arm_math.h"
|
|
|
|
/**
|
|
* @ingroup groupMatrix
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup MatrixAdd
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief Q15 matrix addition.
|
|
* @param[in] *pSrcA points to the first input matrix structure
|
|
* @param[in] *pSrcB points to the second input matrix structure
|
|
* @param[out] *pDst points to output matrix structure
|
|
* @return The function returns either
|
|
* <code>ARM_MATH_SIZE_MISMATCH</code> or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking.
|
|
*
|
|
* <b>Scaling and Overflow Behavior:</b>
|
|
* \par
|
|
* The function uses saturating arithmetic.
|
|
* Results outside of the allowable Q15 range [0x8000 0x7FFF] will be saturated.
|
|
*/
|
|
|
|
arm_status arm_mat_add_q15(
|
|
const arm_matrix_instance_q15 * pSrcA,
|
|
const arm_matrix_instance_q15 * pSrcB,
|
|
arm_matrix_instance_q15 * pDst)
|
|
{
|
|
q15_t *pInA = pSrcA->pData; /* input data matrix pointer A */
|
|
q15_t *pInB = pSrcB->pData; /* input data matrix pointer B */
|
|
q15_t *pOut = pDst->pData; /* output data matrix pointer */
|
|
uint16_t numSamples; /* total number of elements in the matrix */
|
|
uint32_t blkCnt; /* loop counters */
|
|
arm_status status; /* status of matrix addition */
|
|
|
|
#ifdef ARM_MATH_MATRIX_CHECK
|
|
|
|
|
|
/* Check for matrix mismatch condition */
|
|
if ((pSrcA->numRows != pSrcB->numRows) ||
|
|
(pSrcA->numCols != pSrcB->numCols) ||
|
|
(pSrcA->numRows != pDst->numRows) || (pSrcA->numCols != pDst->numCols))
|
|
{
|
|
/* Set status as ARM_MATH_SIZE_MISMATCH */
|
|
status = ARM_MATH_SIZE_MISMATCH;
|
|
}
|
|
else
|
|
#endif /* #ifdef ARM_MATH_MATRIX_CHECK */
|
|
|
|
{
|
|
/* Total number of samples in the input matrix */
|
|
numSamples = (uint16_t) (pSrcA->numRows * pSrcA->numCols);
|
|
|
|
#if defined (ARM_MATH_DSP)
|
|
|
|
/* Run the below code for Cortex-M4 and Cortex-M3 */
|
|
|
|
/* Loop unrolling */
|
|
blkCnt = (uint32_t) numSamples >> 2u;
|
|
|
|
/* First part of the processing with loop unrolling. Compute 4 outputs at a time.
|
|
** a second loop below computes the remaining 1 to 3 samples. */
|
|
while (blkCnt > 0u)
|
|
{
|
|
/* C(m,n) = A(m,n) + B(m,n) */
|
|
/* Add, Saturate and then store the results in the destination buffer. */
|
|
*__SIMD32(pOut)++ = __QADD16(*__SIMD32(pInA)++, *__SIMD32(pInB)++);
|
|
*__SIMD32(pOut)++ = __QADD16(*__SIMD32(pInA)++, *__SIMD32(pInB)++);
|
|
|
|
/* Decrement the loop counter */
|
|
blkCnt--;
|
|
}
|
|
|
|
/* If the blockSize is not a multiple of 4, compute any remaining output samples here.
|
|
** No loop unrolling is used. */
|
|
blkCnt = (uint32_t) numSamples % 0x4u;
|
|
|
|
/* q15 pointers of input and output are initialized */
|
|
|
|
while (blkCnt > 0u)
|
|
{
|
|
/* C(m,n) = A(m,n) + B(m,n) */
|
|
/* Add, Saturate and then store the results in the destination buffer. */
|
|
*pOut++ = (q15_t) __QADD16(*pInA++, *pInB++);
|
|
|
|
/* Decrement the loop counter */
|
|
blkCnt--;
|
|
}
|
|
|
|
#else
|
|
|
|
/* Run the below code for Cortex-M0 */
|
|
|
|
/* Initialize blkCnt with number of samples */
|
|
blkCnt = (uint32_t) numSamples;
|
|
|
|
|
|
/* q15 pointers of input and output are initialized */
|
|
while (blkCnt > 0u)
|
|
{
|
|
/* C(m,n) = A(m,n) + B(m,n) */
|
|
/* Add, Saturate and then store the results in the destination buffer. */
|
|
*pOut++ = (q15_t) __SSAT(((q31_t) * pInA++ + *pInB++), 16);
|
|
|
|
/* Decrement the loop counter */
|
|
blkCnt--;
|
|
}
|
|
|
|
#endif /* #if defined (ARM_MATH_DSP) */
|
|
|
|
/* set status as ARM_MATH_SUCCESS */
|
|
status = ARM_MATH_SUCCESS;
|
|
}
|
|
|
|
/* Return to application */
|
|
return (status);
|
|
}
|
|
|
|
/**
|
|
* @} end of MatrixAdd group
|
|
*/
|