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/BasicMathFunctions/arm_abs_q15.c@4:9cee975aadce, 2014-06-23 (annotated)
- Committer:
- mbed_official
- Date:
- Mon Jun 23 09:30:09 2014 +0100
- Revision:
- 4:9cee975aadce
- Parent:
- 3:7a284390b0ce
Synchronized with git revision 6e7c7bcec41226f536474daae3c13d49e4c0e865
Full URL: https://github.com/mbedmicro/mbed/commit/6e7c7bcec41226f536474daae3c13d49e4c0e865/
Fix signed unsigned compare in dsp library
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
emilmont | 1:fdd22bb7aa52 | 1 | /* ---------------------------------------------------------------------- |
mbed_official | 3:7a284390b0ce | 2 | * Copyright (C) 2010-2013 ARM Limited. All rights reserved. |
emilmont | 1:fdd22bb7aa52 | 3 | * |
mbed_official | 3:7a284390b0ce | 4 | * $Date: 17. January 2013 |
mbed_official | 3:7a284390b0ce | 5 | * $Revision: V1.4.1 |
emilmont | 1:fdd22bb7aa52 | 6 | * |
emilmont | 2:da51fb522205 | 7 | * Project: CMSIS DSP Library |
emilmont | 2:da51fb522205 | 8 | * Title: arm_abs_q15.c |
emilmont | 1:fdd22bb7aa52 | 9 | * |
emilmont | 2:da51fb522205 | 10 | * Description: Q15 vector absolute value. |
emilmont | 1:fdd22bb7aa52 | 11 | * |
emilmont | 1:fdd22bb7aa52 | 12 | * Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 |
emilmont | 1:fdd22bb7aa52 | 13 | * |
mbed_official | 3:7a284390b0ce | 14 | * Redistribution and use in source and binary forms, with or without |
mbed_official | 3:7a284390b0ce | 15 | * modification, are permitted provided that the following conditions |
mbed_official | 3:7a284390b0ce | 16 | * are met: |
mbed_official | 3:7a284390b0ce | 17 | * - Redistributions of source code must retain the above copyright |
mbed_official | 3:7a284390b0ce | 18 | * notice, this list of conditions and the following disclaimer. |
mbed_official | 3:7a284390b0ce | 19 | * - Redistributions in binary form must reproduce the above copyright |
mbed_official | 3:7a284390b0ce | 20 | * notice, this list of conditions and the following disclaimer in |
mbed_official | 3:7a284390b0ce | 21 | * the documentation and/or other materials provided with the |
mbed_official | 3:7a284390b0ce | 22 | * distribution. |
mbed_official | 3:7a284390b0ce | 23 | * - Neither the name of ARM LIMITED nor the names of its contributors |
mbed_official | 3:7a284390b0ce | 24 | * may be used to endorse or promote products derived from this |
mbed_official | 3:7a284390b0ce | 25 | * software without specific prior written permission. |
mbed_official | 3:7a284390b0ce | 26 | * |
mbed_official | 3:7a284390b0ce | 27 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
mbed_official | 3:7a284390b0ce | 28 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
mbed_official | 3:7a284390b0ce | 29 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
mbed_official | 3:7a284390b0ce | 30 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
mbed_official | 3:7a284390b0ce | 31 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
mbed_official | 3:7a284390b0ce | 32 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
mbed_official | 3:7a284390b0ce | 33 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
mbed_official | 3:7a284390b0ce | 34 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
mbed_official | 3:7a284390b0ce | 35 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
mbed_official | 3:7a284390b0ce | 36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
mbed_official | 3:7a284390b0ce | 37 | * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
mbed_official | 3:7a284390b0ce | 38 | * POSSIBILITY OF SUCH DAMAGE. |
emilmont | 1:fdd22bb7aa52 | 39 | * -------------------------------------------------------------------- */ |
emilmont | 1:fdd22bb7aa52 | 40 | |
emilmont | 1:fdd22bb7aa52 | 41 | #include "arm_math.h" |
emilmont | 1:fdd22bb7aa52 | 42 | |
emilmont | 1:fdd22bb7aa52 | 43 | /** |
emilmont | 1:fdd22bb7aa52 | 44 | * @ingroup groupMath |
emilmont | 1:fdd22bb7aa52 | 45 | */ |
emilmont | 1:fdd22bb7aa52 | 46 | |
emilmont | 1:fdd22bb7aa52 | 47 | /** |
emilmont | 1:fdd22bb7aa52 | 48 | * @addtogroup BasicAbs |
emilmont | 1:fdd22bb7aa52 | 49 | * @{ |
emilmont | 1:fdd22bb7aa52 | 50 | */ |
emilmont | 1:fdd22bb7aa52 | 51 | |
emilmont | 1:fdd22bb7aa52 | 52 | /** |
emilmont | 1:fdd22bb7aa52 | 53 | * @brief Q15 vector absolute value. |
emilmont | 1:fdd22bb7aa52 | 54 | * @param[in] *pSrc points to the input buffer |
emilmont | 1:fdd22bb7aa52 | 55 | * @param[out] *pDst points to the output buffer |
emilmont | 1:fdd22bb7aa52 | 56 | * @param[in] blockSize number of samples in each vector |
emilmont | 1:fdd22bb7aa52 | 57 | * @return none. |
emilmont | 1:fdd22bb7aa52 | 58 | * |
emilmont | 1:fdd22bb7aa52 | 59 | * <b>Scaling and Overflow Behavior:</b> |
emilmont | 1:fdd22bb7aa52 | 60 | * \par |
emilmont | 1:fdd22bb7aa52 | 61 | * The function uses saturating arithmetic. |
emilmont | 1:fdd22bb7aa52 | 62 | * The Q15 value -1 (0x8000) will be saturated to the maximum allowable positive value 0x7FFF. |
emilmont | 1:fdd22bb7aa52 | 63 | */ |
emilmont | 1:fdd22bb7aa52 | 64 | |
emilmont | 1:fdd22bb7aa52 | 65 | void arm_abs_q15( |
emilmont | 1:fdd22bb7aa52 | 66 | q15_t * pSrc, |
emilmont | 1:fdd22bb7aa52 | 67 | q15_t * pDst, |
emilmont | 1:fdd22bb7aa52 | 68 | uint32_t blockSize) |
emilmont | 1:fdd22bb7aa52 | 69 | { |
emilmont | 1:fdd22bb7aa52 | 70 | uint32_t blkCnt; /* loop counter */ |
emilmont | 1:fdd22bb7aa52 | 71 | |
mbed_official | 3:7a284390b0ce | 72 | #ifndef ARM_MATH_CM0_FAMILY |
mbed_official | 3:7a284390b0ce | 73 | __SIMD32_TYPE *simd; |
emilmont | 1:fdd22bb7aa52 | 74 | |
emilmont | 1:fdd22bb7aa52 | 75 | /* Run the below code for Cortex-M4 and Cortex-M3 */ |
emilmont | 1:fdd22bb7aa52 | 76 | |
emilmont | 1:fdd22bb7aa52 | 77 | q15_t in1; /* Input value1 */ |
emilmont | 1:fdd22bb7aa52 | 78 | q15_t in2; /* Input value2 */ |
emilmont | 1:fdd22bb7aa52 | 79 | |
emilmont | 1:fdd22bb7aa52 | 80 | |
emilmont | 1:fdd22bb7aa52 | 81 | /*loop Unrolling */ |
emilmont | 1:fdd22bb7aa52 | 82 | blkCnt = blockSize >> 2u; |
emilmont | 1:fdd22bb7aa52 | 83 | |
emilmont | 1:fdd22bb7aa52 | 84 | /* First part of the processing with loop unrolling. Compute 4 outputs at a time. |
emilmont | 1:fdd22bb7aa52 | 85 | ** a second loop below computes the remaining 1 to 3 samples. */ |
mbed_official | 3:7a284390b0ce | 86 | simd = __SIMD32_CONST(pDst); |
emilmont | 1:fdd22bb7aa52 | 87 | while(blkCnt > 0u) |
emilmont | 1:fdd22bb7aa52 | 88 | { |
emilmont | 1:fdd22bb7aa52 | 89 | /* C = |A| */ |
emilmont | 1:fdd22bb7aa52 | 90 | /* Read two inputs */ |
emilmont | 1:fdd22bb7aa52 | 91 | in1 = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 92 | in2 = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 93 | |
emilmont | 1:fdd22bb7aa52 | 94 | |
emilmont | 1:fdd22bb7aa52 | 95 | /* Store the Absolute result in the destination buffer by packing the two values, in a single cycle */ |
emilmont | 1:fdd22bb7aa52 | 96 | #ifndef ARM_MATH_BIG_ENDIAN |
mbed_official | 3:7a284390b0ce | 97 | *simd++ = |
mbed_official | 3:7a284390b0ce | 98 | __PKHBT(((in1 > 0) ? in1 : (q15_t)__QSUB16(0, in1)), |
mbed_official | 3:7a284390b0ce | 99 | ((in2 > 0) ? in2 : (q15_t)__QSUB16(0, in2)), 16); |
emilmont | 1:fdd22bb7aa52 | 100 | |
emilmont | 1:fdd22bb7aa52 | 101 | #else |
emilmont | 1:fdd22bb7aa52 | 102 | |
emilmont | 1:fdd22bb7aa52 | 103 | |
mbed_official | 3:7a284390b0ce | 104 | *simd++ = |
mbed_official | 3:7a284390b0ce | 105 | __PKHBT(((in2 > 0) ? in2 : (q15_t)__QSUB16(0, in2)), |
mbed_official | 3:7a284390b0ce | 106 | ((in1 > 0) ? in1 : (q15_t)__QSUB16(0, in1)), 16); |
emilmont | 1:fdd22bb7aa52 | 107 | |
emilmont | 1:fdd22bb7aa52 | 108 | #endif /* #ifndef ARM_MATH_BIG_ENDIAN */ |
emilmont | 1:fdd22bb7aa52 | 109 | |
emilmont | 1:fdd22bb7aa52 | 110 | in1 = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 111 | in2 = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 112 | |
emilmont | 1:fdd22bb7aa52 | 113 | |
emilmont | 1:fdd22bb7aa52 | 114 | #ifndef ARM_MATH_BIG_ENDIAN |
emilmont | 1:fdd22bb7aa52 | 115 | |
mbed_official | 3:7a284390b0ce | 116 | *simd++ = |
mbed_official | 3:7a284390b0ce | 117 | __PKHBT(((in1 > 0) ? in1 : (q15_t)__QSUB16(0, in1)), |
mbed_official | 3:7a284390b0ce | 118 | ((in2 > 0) ? in2 : (q15_t)__QSUB16(0, in2)), 16); |
emilmont | 1:fdd22bb7aa52 | 119 | |
emilmont | 1:fdd22bb7aa52 | 120 | #else |
emilmont | 1:fdd22bb7aa52 | 121 | |
emilmont | 1:fdd22bb7aa52 | 122 | |
mbed_official | 3:7a284390b0ce | 123 | *simd++ = |
mbed_official | 3:7a284390b0ce | 124 | __PKHBT(((in2 > 0) ? in2 : (q15_t)__QSUB16(0, in2)), |
mbed_official | 3:7a284390b0ce | 125 | ((in1 > 0) ? in1 : (q15_t)__QSUB16(0, in1)), 16); |
emilmont | 1:fdd22bb7aa52 | 126 | |
emilmont | 1:fdd22bb7aa52 | 127 | #endif /* #ifndef ARM_MATH_BIG_ENDIAN */ |
emilmont | 1:fdd22bb7aa52 | 128 | |
emilmont | 1:fdd22bb7aa52 | 129 | /* Decrement the loop counter */ |
emilmont | 1:fdd22bb7aa52 | 130 | blkCnt--; |
emilmont | 1:fdd22bb7aa52 | 131 | } |
mbed_official | 3:7a284390b0ce | 132 | pDst = (q15_t *)simd; |
mbed_official | 3:7a284390b0ce | 133 | |
emilmont | 1:fdd22bb7aa52 | 134 | /* If the blockSize is not a multiple of 4, compute any remaining output samples here. |
emilmont | 1:fdd22bb7aa52 | 135 | ** No loop unrolling is used. */ |
emilmont | 1:fdd22bb7aa52 | 136 | blkCnt = blockSize % 0x4u; |
emilmont | 1:fdd22bb7aa52 | 137 | |
emilmont | 1:fdd22bb7aa52 | 138 | while(blkCnt > 0u) |
emilmont | 1:fdd22bb7aa52 | 139 | { |
emilmont | 1:fdd22bb7aa52 | 140 | /* C = |A| */ |
emilmont | 1:fdd22bb7aa52 | 141 | /* Read the input */ |
emilmont | 1:fdd22bb7aa52 | 142 | in1 = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 143 | |
emilmont | 1:fdd22bb7aa52 | 144 | /* Calculate absolute value of input and then store the result in the destination buffer. */ |
mbed_official | 3:7a284390b0ce | 145 | *pDst++ = (in1 > 0) ? in1 : (q15_t)__QSUB16(0, in1); |
emilmont | 1:fdd22bb7aa52 | 146 | |
emilmont | 1:fdd22bb7aa52 | 147 | /* Decrement the loop counter */ |
emilmont | 1:fdd22bb7aa52 | 148 | blkCnt--; |
emilmont | 1:fdd22bb7aa52 | 149 | } |
emilmont | 1:fdd22bb7aa52 | 150 | |
emilmont | 1:fdd22bb7aa52 | 151 | #else |
emilmont | 1:fdd22bb7aa52 | 152 | |
emilmont | 1:fdd22bb7aa52 | 153 | /* Run the below code for Cortex-M0 */ |
emilmont | 1:fdd22bb7aa52 | 154 | |
emilmont | 1:fdd22bb7aa52 | 155 | q15_t in; /* Temporary input variable */ |
emilmont | 1:fdd22bb7aa52 | 156 | |
emilmont | 1:fdd22bb7aa52 | 157 | /* Initialize blkCnt with number of samples */ |
emilmont | 1:fdd22bb7aa52 | 158 | blkCnt = blockSize; |
emilmont | 1:fdd22bb7aa52 | 159 | |
emilmont | 1:fdd22bb7aa52 | 160 | while(blkCnt > 0u) |
emilmont | 1:fdd22bb7aa52 | 161 | { |
emilmont | 1:fdd22bb7aa52 | 162 | /* C = |A| */ |
emilmont | 1:fdd22bb7aa52 | 163 | /* Read the input */ |
emilmont | 1:fdd22bb7aa52 | 164 | in = *pSrc++; |
emilmont | 1:fdd22bb7aa52 | 165 | |
emilmont | 1:fdd22bb7aa52 | 166 | /* Calculate absolute value of input and then store the result in the destination buffer. */ |
emilmont | 1:fdd22bb7aa52 | 167 | *pDst++ = (in > 0) ? in : ((in == (q15_t) 0x8000) ? 0x7fff : -in); |
emilmont | 1:fdd22bb7aa52 | 168 | |
emilmont | 1:fdd22bb7aa52 | 169 | /* Decrement the loop counter */ |
emilmont | 1:fdd22bb7aa52 | 170 | blkCnt--; |
emilmont | 1:fdd22bb7aa52 | 171 | } |
emilmont | 1:fdd22bb7aa52 | 172 | |
mbed_official | 3:7a284390b0ce | 173 | #endif /* #ifndef ARM_MATH_CM0_FAMILY */ |
emilmont | 1:fdd22bb7aa52 | 174 | |
emilmont | 1:fdd22bb7aa52 | 175 | } |
emilmont | 1:fdd22bb7aa52 | 176 | |
emilmont | 1:fdd22bb7aa52 | 177 | /** |
emilmont | 1:fdd22bb7aa52 | 178 | * @} end of BasicAbs group |
emilmont | 1:fdd22bb7aa52 | 179 | */ |