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authorjaseg <git-bigdata-wsl-arch@jaseg.de>2020-05-03 19:53:02 +0200
committerjaseg <git-bigdata-wsl-arch@jaseg.de>2020-05-03 19:53:02 +0200
commit2628932a40d769d8d0180ba6fed1e7b9b2718982 (patch)
treeea485897653003d01cd16e2b506f69363928fafa /Blink/Drivers/CMSIS/DSP/Source/SupportFunctions/arm_fill_q15.c
parent972da3c0fd449dd6153edaf3c56e0c50d16b726b (diff)
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-/* ----------------------------------------------------------------------
- * Project: CMSIS DSP Library
- * Title: arm_fill_q15.c
- * Description: Fills a constant value into a Q15 vector
- *
- * $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 groupSupport
- */
-
-/**
- * @addtogroup Fill
- * @{
- */
-
-/**
- * @brief Fills a constant value into a Q15 vector.
- * @param[in] value input value to be filled
- * @param[out] *pDst points to output vector
- * @param[in] blockSize length of the output vector
- * @return none.
- *
- */
-
-void arm_fill_q15(
- q15_t value,
- q15_t * pDst,
- uint32_t blockSize)
-{
- uint32_t blkCnt; /* loop counter */
-
-#if defined (ARM_MATH_DSP)
-
- /* Run the below code for Cortex-M4 and Cortex-M3 */
-
- q31_t packedValue; /* value packed to 32 bits */
-
-
- /*loop Unrolling */
- blkCnt = blockSize >> 2U;
-
- /* Packing two 16 bit values to 32 bit value in order to use SIMD */
- packedValue = __PKHBT(value, value, 16U);
-
- /* 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 = value */
- /* Fill the value in the destination buffer */
- *__SIMD32(pDst)++ = packedValue;
- *__SIMD32(pDst)++ = packedValue;
-
- /* 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 = blockSize % 0x4U;
-
-#else
-
- /* Run the below code for Cortex-M0 */
-
- /* Loop over blockSize number of values */
- blkCnt = blockSize;
-
-#endif /* #if defined (ARM_MATH_DSP) */
-
- while (blkCnt > 0U)
- {
- /* C = value */
- /* Fill the value in the destination buffer */
- *pDst++ = value;
-
- /* Decrement the loop counter */
- blkCnt--;
- }
-}
-
-/**
- * @} end of Fill group
- */