From a81fc41c3eb99e8fc52aa734ee63e13c937aab81 Mon Sep 17 00:00:00 2001 From: JanHenrik Date: Sun, 19 Jan 2020 00:56:37 +0100 Subject: added blink example --- .../DSP/Source/MatrixFunctions/arm_mat_scale_q15.c | 171 +++++++++++++++++++++ 1 file changed, 171 insertions(+) create mode 100644 Blink/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_scale_q15.c (limited to 'Blink/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_scale_q15.c') diff --git a/Blink/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_scale_q15.c b/Blink/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_scale_q15.c new file mode 100644 index 0000000..4eff925 --- /dev/null +++ b/Blink/Drivers/CMSIS/DSP/Source/MatrixFunctions/arm_mat_scale_q15.c @@ -0,0 +1,171 @@ +/* ---------------------------------------------------------------------- + * Project: CMSIS DSP Library + * Title: arm_mat_scale_q15.c + * Description: Multiplies a Q15 matrix by a scalar + * + * $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 groupMatrix + */ + +/** + * @addtogroup MatrixScale + * @{ + */ + +/** + * @brief Q15 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 + * ARM_MATH_SIZE_MISMATCH or ARM_MATH_SUCCESS based on the outcome of size checking. + * + * @details + * Scaling and Overflow Behavior: + * \par + * The input data *pSrc and scaleFract are in 1.15 format. + * These are multiplied to yield a 2.30 intermediate result and this is shifted with saturation to 1.15 format. + */ + +arm_status arm_mat_scale_q15( + const arm_matrix_instance_q15 * pSrc, + q15_t scaleFract, + int32_t shift, + arm_matrix_instance_q15 * pDst) +{ + q15_t *pIn = pSrc->pData; /* input data matrix pointer */ + q15_t *pOut = pDst->pData; /* output data matrix pointer */ + uint32_t numSamples; /* total number of elements in the matrix */ + int32_t totShift = 15 - shift; /* total shift to apply after scaling */ + uint32_t blkCnt; /* loop counters */ + arm_status status; /* status of matrix scaling */ + +#if defined (ARM_MATH_DSP) + + q15_t in1, in2, in3, in4; + q31_t out1, out2, out3, out4; + q31_t inA1, inA2; + +#endif // #if defined (ARM_MATH_DSP) + +#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; + +#if defined (ARM_MATH_DSP) + + /* Run the below code for Cortex-M4 and Cortex-M3 */ + /* Loop Unrolling */ + blkCnt = numSamples >> 2; + + /* 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 */ + /* Scale, saturate and then store the results in the destination buffer. */ + /* Reading 2 inputs from memory */ + inA1 = _SIMD32_OFFSET(pIn); + inA2 = _SIMD32_OFFSET(pIn + 2); + + /* C = A * scale */ + /* Scale the inputs and then store the 2 results in the destination buffer + * in single cycle by packing the outputs */ + out1 = (q31_t) ((q15_t) (inA1 >> 16) * scaleFract); + out2 = (q31_t) ((q15_t) inA1 * scaleFract); + out3 = (q31_t) ((q15_t) (inA2 >> 16) * scaleFract); + out4 = (q31_t) ((q15_t) inA2 * scaleFract); + + out1 = out1 >> totShift; + inA1 = _SIMD32_OFFSET(pIn + 4); + out2 = out2 >> totShift; + inA2 = _SIMD32_OFFSET(pIn + 6); + out3 = out3 >> totShift; + out4 = out4 >> totShift; + + in1 = (q15_t) (__SSAT(out1, 16)); + in2 = (q15_t) (__SSAT(out2, 16)); + in3 = (q15_t) (__SSAT(out3, 16)); + in4 = (q15_t) (__SSAT(out4, 16)); + + _SIMD32_OFFSET(pOut) = __PKHBT(in2, in1, 16); + _SIMD32_OFFSET(pOut + 2) = __PKHBT(in4, in3, 16); + + /* 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 /* #if defined (ARM_MATH_DSP) */ + + while (blkCnt > 0U) + { + /* C(m,n) = A(m,n) * k */ + /* Scale, saturate and then store the results in the destination buffer. */ + *pOut++ = + (q15_t) (__SSAT(((q31_t) (*pIn++) * scaleFract) >> totShift, 16)); + + /* 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 + */ -- cgit