Fork of mbed-dsp. CMSIS-DSP library of supporting NEON
Dependents: mbed-os-example-cmsis_dsp_neon
Fork of mbed-dsp by
Information
Japanese version is available in lower part of this page.
このページの後半に日本語版が用意されています.
CMSIS-DSP of supporting NEON
What is this ?
A library for CMSIS-DSP of supporting NEON.
We supported the NEON to CMSIS-DSP Ver1.4.3(CMSIS V4.1) that ARM supplied, has achieved the processing speed improvement.
If you use the mbed-dsp library, you can use to replace this library.
CMSIS-DSP of supporting NEON is provied as a library.
Library Creation environment
CMSIS-DSP library of supporting NEON was created by the following environment.
- Compiler
ARMCC Version 5.03 - Compile option switch[C Compiler]
-DARM_MATH_MATRIX_CHECK -DARM_MATH_ROUNDING -O3 -Otime --cpu=Cortex-A9 --littleend --arm --apcs=/interwork --no_unaligned_access --fpu=vfpv3_fp16 --fpmode=fast --apcs=/hardfp --vectorize --asm
- Compile option switch[Assembler]
--cpreproc --cpu=Cortex-A9 --littleend --arm --apcs=/interwork --no_unaligned_access --fpu=vfpv3_fp16 --fpmode=fast --apcs=/hardfp
Effects of NEON support
In the data which passes to each function, large size will be expected more effective than small size.
Also if the data is a multiple of 16, effect will be expected in every function in the CMSIS-DSP.
NEON対応CMSIS-DSP
概要
NEON対応したCMSIS-DSPのライブラリです。
ARM社提供のCMSIS-DSP Ver1.4.3(CMSIS V4.1)をターゲットにNEON対応を行ない、処理速度向上を実現しております。
mbed-dspライブラリを使用している場合は、本ライブラリに置き換えて使用することができます。
NEON対応したCMSIS-DSPはライブラリで提供します。
ライブラリ作成環境
NEON対応CMSIS-DSPライブラリは、以下の環境で作成しています。
- コンパイラ
ARMCC Version 5.03 - コンパイルオプションスイッチ[C Compiler]
-DARM_MATH_MATRIX_CHECK -DARM_MATH_ROUNDING -O3 -Otime --cpu=Cortex-A9 --littleend --arm --apcs=/interwork --no_unaligned_access --fpu=vfpv3_fp16 --fpmode=fast --apcs=/hardfp --vectorize --asm
- コンパイルオプションスイッチ[Assembler]
--cpreproc --cpu=Cortex-A9 --littleend --arm --apcs=/interwork --no_unaligned_access --fpu=vfpv3_fp16 --fpmode=fast --apcs=/hardfp
NEON対応による効果について
CMSIS-DSP内の各関数へ渡すデータは、小さいサイズよりも大きいサイズの方が効果が見込めます。
また、16の倍数のデータであれば、CMSIS-DSP内のどの関数でも効果が見込めます。
cmsis_dsp/StatisticsFunctions/arm_max_q31.c@1:fdd22bb7aa52, 2012-11-28 (annotated)
- Committer:
- emilmont
- Date:
- Wed Nov 28 12:30:09 2012 +0000
- Revision:
- 1:fdd22bb7aa52
- Child:
- 2:da51fb522205
DSP library code
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
emilmont | 1:fdd22bb7aa52 | 1 | /* ---------------------------------------------------------------------- |
emilmont | 1:fdd22bb7aa52 | 2 | * Copyright (C) 2010 ARM Limited. All rights reserved. |
emilmont | 1:fdd22bb7aa52 | 3 | * |
emilmont | 1:fdd22bb7aa52 | 4 | * $Date: 15. February 2012 |
emilmont | 1:fdd22bb7aa52 | 5 | * $Revision: V1.1.0 |
emilmont | 1:fdd22bb7aa52 | 6 | * |
emilmont | 1:fdd22bb7aa52 | 7 | * Project: CMSIS DSP Library |
emilmont | 1:fdd22bb7aa52 | 8 | * Title: arm_max_q31.c |
emilmont | 1:fdd22bb7aa52 | 9 | * |
emilmont | 1:fdd22bb7aa52 | 10 | * Description: Maximum value of a Q31 vector. |
emilmont | 1:fdd22bb7aa52 | 11 | * |
emilmont | 1:fdd22bb7aa52 | 12 | * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 |
emilmont | 1:fdd22bb7aa52 | 13 | * |
emilmont | 1:fdd22bb7aa52 | 14 | * Version 1.1.0 2012/02/15 |
emilmont | 1:fdd22bb7aa52 | 15 | * Updated with more optimizations, bug fixes and minor API changes. |
emilmont | 1:fdd22bb7aa52 | 16 | * |
emilmont | 1:fdd22bb7aa52 | 17 | * Version 1.0.10 2011/7/15 |
emilmont | 1:fdd22bb7aa52 | 18 | * Big Endian support added and Merged M0 and M3/M4 Source code. |
emilmont | 1:fdd22bb7aa52 | 19 | * |
emilmont | 1:fdd22bb7aa52 | 20 | * Version 1.0.3 2010/11/29 |
emilmont | 1:fdd22bb7aa52 | 21 | * Re-organized the CMSIS folders and updated documentation. |
emilmont | 1:fdd22bb7aa52 | 22 | * |
emilmont | 1:fdd22bb7aa52 | 23 | * Version 1.0.2 2010/11/11 |
emilmont | 1:fdd22bb7aa52 | 24 | * Documentation updated. |
emilmont | 1:fdd22bb7aa52 | 25 | * |
emilmont | 1:fdd22bb7aa52 | 26 | * Version 1.0.1 2010/10/05 |
emilmont | 1:fdd22bb7aa52 | 27 | * Production release and review comments incorporated. |
emilmont | 1:fdd22bb7aa52 | 28 | * |
emilmont | 1:fdd22bb7aa52 | 29 | * Version 1.0.0 2010/09/20 |
emilmont | 1:fdd22bb7aa52 | 30 | * Production release and review comments incorporated. |
emilmont | 1:fdd22bb7aa52 | 31 | * ---------------------------------------------------------------------------- */ |
emilmont | 1:fdd22bb7aa52 | 32 | |
emilmont | 1:fdd22bb7aa52 | 33 | #include "arm_math.h" |
emilmont | 1:fdd22bb7aa52 | 34 | |
emilmont | 1:fdd22bb7aa52 | 35 | /** |
emilmont | 1:fdd22bb7aa52 | 36 | * @ingroup groupStats |
emilmont | 1:fdd22bb7aa52 | 37 | */ |
emilmont | 1:fdd22bb7aa52 | 38 | |
emilmont | 1:fdd22bb7aa52 | 39 | /** |
emilmont | 1:fdd22bb7aa52 | 40 | * @addtogroup Max |
emilmont | 1:fdd22bb7aa52 | 41 | * @{ |
emilmont | 1:fdd22bb7aa52 | 42 | */ |
emilmont | 1:fdd22bb7aa52 | 43 | |
emilmont | 1:fdd22bb7aa52 | 44 | |
emilmont | 1:fdd22bb7aa52 | 45 | /** |
emilmont | 1:fdd22bb7aa52 | 46 | * @brief Maximum value of a Q31 vector. |
emilmont | 1:fdd22bb7aa52 | 47 | * @param[in] *pSrc points to the input vector |
emilmont | 1:fdd22bb7aa52 | 48 | * @param[in] blockSize length of the input vector |
emilmont | 1:fdd22bb7aa52 | 49 | * @param[out] *pResult maximum value returned here |
emilmont | 1:fdd22bb7aa52 | 50 | * @param[out] *pIndex index of maximum value returned here |
emilmont | 1:fdd22bb7aa52 | 51 | * @return none. |
emilmont | 1:fdd22bb7aa52 | 52 | */ |
emilmont | 1:fdd22bb7aa52 | 53 | |
emilmont | 1:fdd22bb7aa52 | 54 | void arm_max_q31( |
emilmont | 1:fdd22bb7aa52 | 55 | q31_t * pSrc, |
emilmont | 1:fdd22bb7aa52 | 56 | uint32_t blockSize, |
emilmont | 1:fdd22bb7aa52 | 57 | q31_t * pResult, |
emilmont | 1:fdd22bb7aa52 | 58 | uint32_t * pIndex) |
emilmont | 1:fdd22bb7aa52 | 59 | { |
emilmont | 1:fdd22bb7aa52 | 60 | #ifndef ARM_MATH_CM0 |
emilmont | 1:fdd22bb7aa52 | 61 | |
emilmont | 1:fdd22bb7aa52 | 62 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
emilmont | 1:fdd22bb7aa52 | 63 | q31_t maxVal1, maxVal2, out; /* Temporary variables to store the output value. */ |
emilmont | 1:fdd22bb7aa52 | 64 | uint32_t blkCnt, outIndex, count; /* loop counter */ |
emilmont | 1:fdd22bb7aa52 | 65 | |
emilmont | 1:fdd22bb7aa52 | 66 | /* Initialise the count value. */ |
emilmont | 1:fdd22bb7aa52 | 67 | count = 0u; |
emilmont | 1:fdd22bb7aa52 | 68 | /* Initialise the index value to zero. */ |
emilmont | 1:fdd22bb7aa52 | 69 | outIndex = 0u; |
emilmont | 1:fdd22bb7aa52 | 70 | /* Load first input value that act as reference value for comparision */ |
emilmont | 1:fdd22bb7aa52 | 71 | out = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 72 | |
emilmont | 1:fdd22bb7aa52 | 73 | /* Loop unrolling */ |
emilmont | 1:fdd22bb7aa52 | 74 | blkCnt = (blockSize - 1u) >> 2u; |
emilmont | 1:fdd22bb7aa52 | 75 | |
emilmont | 1:fdd22bb7aa52 | 76 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
emilmont | 1:fdd22bb7aa52 | 77 | while(blkCnt > 0u) |
emilmont | 1:fdd22bb7aa52 | 78 | { |
emilmont | 1:fdd22bb7aa52 | 79 | /* Initialize maxVal to the next consecutive values one by one */ |
emilmont | 1:fdd22bb7aa52 | 80 | maxVal1 = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 81 | |
emilmont | 1:fdd22bb7aa52 | 82 | maxVal2 = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 83 | |
emilmont | 1:fdd22bb7aa52 | 84 | /* compare for the maximum value */ |
emilmont | 1:fdd22bb7aa52 | 85 | if(out < maxVal1) |
emilmont | 1:fdd22bb7aa52 | 86 | { |
emilmont | 1:fdd22bb7aa52 | 87 | /* Update the maximum value and its index */ |
emilmont | 1:fdd22bb7aa52 | 88 | out = maxVal1; |
emilmont | 1:fdd22bb7aa52 | 89 | outIndex = count + 1u; |
emilmont | 1:fdd22bb7aa52 | 90 | } |
emilmont | 1:fdd22bb7aa52 | 91 | |
emilmont | 1:fdd22bb7aa52 | 92 | maxVal1 = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 93 | |
emilmont | 1:fdd22bb7aa52 | 94 | /* compare for the maximum value */ |
emilmont | 1:fdd22bb7aa52 | 95 | if(out < maxVal2) |
emilmont | 1:fdd22bb7aa52 | 96 | { |
emilmont | 1:fdd22bb7aa52 | 97 | /* Update the maximum value and its index */ |
emilmont | 1:fdd22bb7aa52 | 98 | out = maxVal2; |
emilmont | 1:fdd22bb7aa52 | 99 | outIndex = count + 2u; |
emilmont | 1:fdd22bb7aa52 | 100 | } |
emilmont | 1:fdd22bb7aa52 | 101 | |
emilmont | 1:fdd22bb7aa52 | 102 | maxVal2 = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 103 | |
emilmont | 1:fdd22bb7aa52 | 104 | /* compare for the maximum value */ |
emilmont | 1:fdd22bb7aa52 | 105 | if(out < maxVal1) |
emilmont | 1:fdd22bb7aa52 | 106 | { |
emilmont | 1:fdd22bb7aa52 | 107 | /* Update the maximum value and its index */ |
emilmont | 1:fdd22bb7aa52 | 108 | out = maxVal1; |
emilmont | 1:fdd22bb7aa52 | 109 | outIndex = count + 3u; |
emilmont | 1:fdd22bb7aa52 | 110 | } |
emilmont | 1:fdd22bb7aa52 | 111 | |
emilmont | 1:fdd22bb7aa52 | 112 | /* compare for the maximum value */ |
emilmont | 1:fdd22bb7aa52 | 113 | if(out < maxVal2) |
emilmont | 1:fdd22bb7aa52 | 114 | { |
emilmont | 1:fdd22bb7aa52 | 115 | /* Update the maximum value and its index */ |
emilmont | 1:fdd22bb7aa52 | 116 | out = maxVal2; |
emilmont | 1:fdd22bb7aa52 | 117 | outIndex = count + 4u; |
emilmont | 1:fdd22bb7aa52 | 118 | } |
emilmont | 1:fdd22bb7aa52 | 119 | |
emilmont | 1:fdd22bb7aa52 | 120 | count += 4u; |
emilmont | 1:fdd22bb7aa52 | 121 | |
emilmont | 1:fdd22bb7aa52 | 122 | /* Decrement the loop counter */ |
emilmont | 1:fdd22bb7aa52 | 123 | blkCnt--; |
emilmont | 1:fdd22bb7aa52 | 124 | } |
emilmont | 1:fdd22bb7aa52 | 125 | |
emilmont | 1:fdd22bb7aa52 | 126 | /* if (blockSize - 1u) is not multiple of 4 */ |
emilmont | 1:fdd22bb7aa52 | 127 | blkCnt = (blockSize - 1u) % 4u; |
emilmont | 1:fdd22bb7aa52 | 128 | |
emilmont | 1:fdd22bb7aa52 | 129 | #else |
emilmont | 1:fdd22bb7aa52 | 130 | |
emilmont | 1:fdd22bb7aa52 | 131 | /* Run the below code for Cortex-M0 */ |
emilmont | 1:fdd22bb7aa52 | 132 | q31_t maxVal1, out; /* Temporary variables to store the output value. */ |
emilmont | 1:fdd22bb7aa52 | 133 | uint32_t blkCnt, outIndex; /* loop counter */ |
emilmont | 1:fdd22bb7aa52 | 134 | |
emilmont | 1:fdd22bb7aa52 | 135 | /* Initialise the index value to zero. */ |
emilmont | 1:fdd22bb7aa52 | 136 | outIndex = 0u; |
emilmont | 1:fdd22bb7aa52 | 137 | /* Load first input value that act as reference value for comparision */ |
emilmont | 1:fdd22bb7aa52 | 138 | out = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 139 | |
emilmont | 1:fdd22bb7aa52 | 140 | blkCnt = (blockSize - 1u); |
emilmont | 1:fdd22bb7aa52 | 141 | |
emilmont | 1:fdd22bb7aa52 | 142 | #endif /* #ifndef ARM_MATH_CM0 */ |
emilmont | 1:fdd22bb7aa52 | 143 | |
emilmont | 1:fdd22bb7aa52 | 144 | while(blkCnt > 0u) |
emilmont | 1:fdd22bb7aa52 | 145 | { |
emilmont | 1:fdd22bb7aa52 | 146 | /* Initialize maxVal to the next consecutive values one by one */ |
emilmont | 1:fdd22bb7aa52 | 147 | maxVal1 = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 148 | |
emilmont | 1:fdd22bb7aa52 | 149 | /* compare for the maximum value */ |
emilmont | 1:fdd22bb7aa52 | 150 | if(out < maxVal1) |
emilmont | 1:fdd22bb7aa52 | 151 | { |
emilmont | 1:fdd22bb7aa52 | 152 | /* Update the maximum value and it's index */ |
emilmont | 1:fdd22bb7aa52 | 153 | out = maxVal1; |
emilmont | 1:fdd22bb7aa52 | 154 | outIndex = blockSize - blkCnt; |
emilmont | 1:fdd22bb7aa52 | 155 | } |
emilmont | 1:fdd22bb7aa52 | 156 | |
emilmont | 1:fdd22bb7aa52 | 157 | /* Decrement the loop counter */ |
emilmont | 1:fdd22bb7aa52 | 158 | blkCnt--; |
emilmont | 1:fdd22bb7aa52 | 159 | |
emilmont | 1:fdd22bb7aa52 | 160 | } |
emilmont | 1:fdd22bb7aa52 | 161 | |
emilmont | 1:fdd22bb7aa52 | 162 | /* Store the maximum value and its index into destination pointers */ |
emilmont | 1:fdd22bb7aa52 | 163 | *pResult = out; |
emilmont | 1:fdd22bb7aa52 | 164 | *pIndex = outIndex; |
emilmont | 1:fdd22bb7aa52 | 165 | } |
emilmont | 1:fdd22bb7aa52 | 166 | |
emilmont | 1:fdd22bb7aa52 | 167 | /** |
emilmont | 1:fdd22bb7aa52 | 168 | * @} end of Max group |
emilmont | 1:fdd22bb7aa52 | 169 | */ |