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| Rev | Author | Line No. | Line |
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| 2 | mjames | 1 | /* ---------------------------------------------------------------------- |
| 2 | * Project: CMSIS DSP Library |
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| 3 | * Title: arm_fill_q31.c |
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| 4 | * Description: Fills a constant value into a Q31 vector |
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| 5 | * |
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| 6 | * $Date: 27. January 2017 |
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| 7 | * $Revision: V.1.5.1 |
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| 8 | * |
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| 9 | * Target Processor: Cortex-M cores |
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| 10 | * -------------------------------------------------------------------- */ |
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| 11 | /* |
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| 12 | * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved. |
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| 13 | * |
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| 14 | * SPDX-License-Identifier: Apache-2.0 |
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| 15 | * |
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| 16 | * Licensed under the Apache License, Version 2.0 (the License); you may |
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| 17 | * not use this file except in compliance with the License. |
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| 18 | * You may obtain a copy of the License at |
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| 19 | * |
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| 20 | * www.apache.org/licenses/LICENSE-2.0 |
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| 21 | * |
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| 22 | * Unless required by applicable law or agreed to in writing, software |
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| 23 | * distributed under the License is distributed on an AS IS BASIS, WITHOUT |
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| 24 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 25 | * See the License for the specific language governing permissions and |
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| 26 | * limitations under the License. |
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| 27 | */ |
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| 28 | |||
| 29 | #include "arm_math.h" |
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| 30 | |||
| 31 | /** |
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| 32 | * @ingroup groupSupport |
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| 33 | */ |
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| 34 | |||
| 35 | /** |
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| 36 | * @addtogroup Fill |
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| 37 | * @{ |
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| 38 | */ |
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| 39 | |||
| 40 | /** |
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| 41 | * @brief Fills a constant value into a Q31 vector. |
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| 42 | * @param[in] value input value to be filled |
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| 43 | * @param[out] *pDst points to output vector |
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| 44 | * @param[in] blockSize length of the output vector |
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| 45 | * @return none. |
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| 46 | * |
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| 47 | */ |
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| 48 | |||
| 49 | void arm_fill_q31( |
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| 50 | q31_t value, |
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| 51 | q31_t * pDst, |
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| 52 | uint32_t blockSize) |
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| 53 | { |
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| 54 | uint32_t blkCnt; /* loop counter */ |
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| 55 | |||
| 56 | |||
| 57 | #if defined (ARM_MATH_DSP) |
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| 58 | |||
| 59 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
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| 60 | q31_t in1 = value; |
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| 61 | q31_t in2 = value; |
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| 62 | q31_t in3 = value; |
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| 63 | q31_t in4 = value; |
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| 64 | |||
| 65 | /*loop Unrolling */ |
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| 66 | blkCnt = blockSize >> 2U; |
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| 67 | |||
| 68 | /* First part of the processing with loop unrolling. Compute 4 outputs at a time. |
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| 69 | ** a second loop below computes the remaining 1 to 3 samples. */ |
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| 70 | while (blkCnt > 0U) |
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| 71 | { |
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| 72 | /* C = value */ |
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| 73 | /* Fill the value in the destination buffer */ |
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| 74 | *pDst++ = in1; |
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| 75 | *pDst++ = in2; |
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| 76 | *pDst++ = in3; |
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| 77 | *pDst++ = in4; |
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| 78 | |||
| 79 | /* Decrement the loop counter */ |
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| 80 | blkCnt--; |
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| 81 | } |
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| 82 | |||
| 83 | /* If the blockSize is not a multiple of 4, compute any remaining output samples here. |
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| 84 | ** No loop unrolling is used. */ |
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| 85 | blkCnt = blockSize % 0x4U; |
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| 86 | |||
| 87 | #else |
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| 88 | |||
| 89 | /* Run the below code for Cortex-M0 */ |
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| 90 | |||
| 91 | /* Loop over blockSize number of values */ |
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| 92 | blkCnt = blockSize; |
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| 93 | |||
| 94 | #endif /* #if defined (ARM_MATH_DSP) */ |
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| 95 | |||
| 96 | while (blkCnt > 0U) |
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| 97 | { |
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| 98 | /* C = value */ |
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| 99 | /* Fill the value in the destination buffer */ |
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| 100 | *pDst++ = value; |
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| 101 | |||
| 102 | /* Decrement the loop counter */ |
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| 103 | blkCnt--; |
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| 104 | } |
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| 105 | } |
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| 106 | |||
| 107 | /** |
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| 108 | * @} end of Fill group |
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| 109 | */ |