Renesas
Fork of mbed-dsp. CMSIS-DSP library of supporting NEON
Dependents: mbed-os-example-cmsis_dsp_neon
Fork of
mbed-dsp
by 
mbed official
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。
Diff: cmsis_dsp/MatrixFunctions/arm_mat_scale_q31.c
- Revision:
- 5:a912b042151f
- Parent:
- 4:9cee975aadce
--- a/cmsis_dsp/MatrixFunctions/arm_mat_scale_q31.c Mon Jun 23 09:30:09 2014 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,202 +0,0 @@
-/* ----------------------------------------------------------------------
-* Copyright (C) 2010-2013 ARM Limited. All rights reserved.
-*
-* $Date: 17. January 2013
-* $Revision: V1.4.1
-*
-* Project: CMSIS DSP Library
-* Title: arm_mat_scale_q31.c
-*
-* Description: Multiplies a Q31 matrix by a scalar.
-*
-* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0
-*
-* Redistribution and use in source and binary forms, with or without
-* modification, are permitted provided that the following conditions
-* are met:
-* - Redistributions of source code must retain the above copyright
-* notice, this list of conditions and the following disclaimer.
-* - Redistributions in binary form must reproduce the above copyright
-* notice, this list of conditions and the following disclaimer in
-* the documentation and/or other materials provided with the
-* distribution.
-* - Neither the name of ARM LIMITED nor the names of its contributors
-* may be used to endorse or promote products derived from this
-* software without specific prior written permission.
-*
-* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
-* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
-* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
-* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
-* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
-* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-* POSSIBILITY OF SUCH DAMAGE. ------------------------------------------------ */
-
-#include "arm_math.h"
-
-/**
- * @ingroup groupMatrix
- */
-
-/**
- * @addtogroup MatrixScale
- * @{
- */
-
-/**
- * @brief Q31 matrix scaling.
- * @param[in] *pSrc points to input matrix
- * @param[in] scaleFract fractional portion of the scale factor
- * @param[in] shift number of bits to shift the result by
- * @param[out] *pDst points to output matrix structure
- * @return The function returns either
- * <code>ARM_MATH_SIZE_MISMATCH</code> or <code>ARM_MATH_SUCCESS</code> based on the outcome of size checking.
- *
- * @details
- * <b>Scaling and Overflow Behavior:</b>
- * \par
- * The input data <code>*pSrc</code> and <code>scaleFract</code> are in 1.31 format.
- * These are multiplied to yield a 2.62 intermediate result and this is shifted with saturation to 1.31 format.
- */
-
-arm_status arm_mat_scale_q31(
- const arm_matrix_instance_q31 * pSrc,
- q31_t scaleFract,
- int32_t shift,
- arm_matrix_instance_q31 * pDst)
-{
- q31_t *pIn = pSrc->pData; /* input data matrix pointer */
- q31_t *pOut = pDst->pData; /* output data matrix pointer */
- uint32_t numSamples; /* total number of elements in the matrix */
- int32_t totShift = shift + 1; /* shift to apply after scaling */
- uint32_t blkCnt; /* loop counters */
- arm_status status; /* status of matrix scaling */
- q31_t in1, in2, out1; /* temporary variabels */
-
-#ifndef ARM_MATH_CM0_FAMILY
-
- q31_t in3, in4, out2, out3, out4; /* temporary variables */
-
-#endif // #ifndef ARM_MAT_CM0
-
-#ifdef ARM_MATH_MATRIX_CHECK
- /* Check for matrix mismatch */
- if((pSrc->numRows != pDst->numRows) || (pSrc->numCols != pDst->numCols))
- {
- /* Set status as ARM_MATH_SIZE_MISMATCH */
- status = ARM_MATH_SIZE_MISMATCH;
- }
- else
-#endif // #ifdef ARM_MATH_MATRIX_CHECK
- {
- /* Total number of samples in the input matrix */
- numSamples = (uint32_t) pSrc->numRows * pSrc->numCols;
-
-#ifndef ARM_MATH_CM0_FAMILY
-
- /* Run the below code for Cortex-M4 and Cortex-M3 */
-
- /* Loop Unrolling */
- blkCnt = numSamples >> 2u;
-
- /* 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(m,n) = A(m,n) * k */
- /* Read values from input */
- in1 = *pIn;
- in2 = *(pIn + 1);
- in3 = *(pIn + 2);
- in4 = *(pIn + 3);
-
- /* multiply input with scaler value */
- in1 = ((q63_t) in1 * scaleFract) >> 32;
- in2 = ((q63_t) in2 * scaleFract) >> 32;
- in3 = ((q63_t) in3 * scaleFract) >> 32;
- in4 = ((q63_t) in4 * scaleFract) >> 32;
-
- /* apply shifting */
- out1 = in1 << totShift;
- out2 = in2 << totShift;
-
- /* saturate the results. */
- if(in1 != (out1 >> totShift))
- out1 = 0x7FFFFFFF ^ (in1 >> 31);
-
- if(in2 != (out2 >> totShift))
- out2 = 0x7FFFFFFF ^ (in2 >> 31);
-
- out3 = in3 << totShift;
- out4 = in4 << totShift;
-
- *pOut = out1;
- *(pOut + 1) = out2;
-
- if(in3 != (out3 >> totShift))
- out3 = 0x7FFFFFFF ^ (in3 >> 31);
-
- if(in4 != (out4 >> totShift))
- out4 = 0x7FFFFFFF ^ (in4 >> 31);
-
-
- *(pOut + 2) = out3;
- *(pOut + 3) = out4;
-
- /* update pointers to process next sampels */
- pIn += 4u;
- pOut += 4u;
-
-
- /* Decrement the numSamples loop counter */
- blkCnt--;
- }
-
- /* If the numSamples is not a multiple of 4, compute any remaining output samples here.
- ** No loop unrolling is used. */
- blkCnt = numSamples % 0x4u;
-
-#else
-
- /* Run the below code for Cortex-M0 */
-
- /* Initialize blkCnt with number of samples */
- blkCnt = numSamples;
-
-#endif /* #ifndef ARM_MATH_CM0_FAMILY */
-
- while(blkCnt > 0u)
- {
- /* C(m,n) = A(m,n) * k */
- /* Scale, saturate and then store the results in the destination buffer. */
- in1 = *pIn++;
-
- in2 = ((q63_t) in1 * scaleFract) >> 32;
-
- out1 = in2 << totShift;
-
- if(in2 != (out1 >> totShift))
- out1 = 0x7FFFFFFF ^ (in2 >> 31);
-
- *pOut++ = out1;
-
- /* Decrement the numSamples loop counter */
- blkCnt--;
- }
-
- /* Set status as ARM_MATH_SUCCESS */
- status = ARM_MATH_SUCCESS;
- }
-
- /* Return to application */
- return (status);
-}
-
-/**
- * @} end of MatrixScale group
- */