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Functions

Name
void plp_std_q32s_rv32im(const int32_t restrict pSrc, uint32_t blockSize, uint32_t fracBits, int32_t restrict pRes)
Standard deviation of a 32-bit fixed point vector for RV32IM extension.

Functions Documentation

function plp_std_q32s_rv32im

void plp_std_q32s_rv32im(
    const int32_t *__restrict__ pSrc,
    uint32_t blockSize,
    uint32_t fracBits,
    int32_t *__restrict__ pRes
)

Standard deviation of a 32-bit fixed point vector for RV32IM extension.

Parameters:

  • pSrc points to the input vector
  • blockSize number of samples in input vector
  • pRes standard deviation returned here

Return: none

Statisical standard deviation of a 32-bit fixed point vector for RV32IM extension.

Source code

/* =====================================================================
 * Project:      PULP DSP Library
 * Title:        plp_std_q32s_rv32im.c
 * Description:  Kernel to calculate the standard deviation of a 32-bit fixed point vector glue code
 *on RV32IM
 *
 * $Date:        30.06.2020
 *
 * Target Processor: PULP cores
 * ===================================================================== */
/*
 * Copyright (C) 2020 ETH Zurich and University of Bologna.
 *
 * Author: Moritz Scherer, ETH Zurich
 *
 * 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 "plp_math.h"

void plp_std_q32s_rv32im(const int32_t *__restrict__ pSrc,
                         uint32_t blockSize,
                         uint32_t fracBits,
                         int32_t *__restrict__ pRes) {

    int32_t variance;
    plp_var_q32(pSrc, blockSize, fracBits, &variance);

    int32_t intermediate = variance;
    plp_sqrt_q32(&intermediate, fracBits, pRes);
}

Updated on 2023-03-01 at 16:16:33 +0000