| /* ---------------------------------------------------------------------- |
| * Project: CMSIS DSP Library |
| * Title: arm_fill_q7.c |
| * Description: Fills a constant value into a Q7 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 Q7 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_q7( |
| q7_t value, |
| q7_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 four 8 bit values to 32 bit value in order to use SIMD */ |
| packedValue = __PACKq7(value, value, value, value); |
| |
| /* 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; |
| |
| /* 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 |
| */ |