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/github/workspace/src/BasicMathFunctions/scale/kernels/plp_scale_i8s_xpulpv2.c

Functions

Name
void plp_scale_i8s_xpulpv2(const int8_t restrict pSrc, int8_t scaleFactor, int32_t shift, int8_t restrict pDst, uint32_t blockSize)
multiply a vector by a scalar for 8-bit integers on XpulpV2

Defines

Name
BASIC_VERSION

Functions Documentation

function plp_scale_i8s_xpulpv2

void plp_scale_i8s_xpulpv2(
    const int8_t *__restrict__ pSrc,
    int8_t scaleFactor,
    int32_t shift,
    int8_t *__restrict__ pDst,
    uint32_t blockSize
)

multiply a vector by a scalar for 8-bit integers on XpulpV2

Parameters:

  • pSrc points to the input vector
  • scaleFactor Factor to multiply all elements before shifting
  • shift number of bits to shift the result by
  • pDst points to the output vector
  • blockSize number of samples in each vector

Return: none

Macros Documentation

define BASIC_VERSION

#define BASIC_VERSION

Source code

/* =====================================================================
 * Project:      PULP DSP Library
 * Title:        plp_scale_i8s_xpulpv2.c
 * Description:  8-bit integer vector scale for XPULPV2
 *
 * $Date:        17 Mar 2021
 * $Revision:    V0
 *
 * Target Processor: PULP cores
 * ===================================================================== */
/*
 * Copyright (C) 2020 ETH Zurich and Ubiversity of Bologna. All rights reserved.
 *
 * Author: Tibor Schneider, 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_scale_i8s_xpulpv2(const int8_t *__restrict__ pSrc, int8_t scaleFactor, int32_t shift, int8_t *__restrict__ pDst, uint32_t blockSize) {

#define BASIC_VERSION // if used don't forget to also use the undefine at end of file
#ifdef BASIC_VERSION

  for (int i = 0; i < blockSize; i++)
    {
      int32_t val = ((int32_t)pSrc[i]) * ((int32_t)scaleFactor);
      pDst[i] = (int8_t)(val >> shift);
    }

#else

    // TODO: Hackathon

#endif
#undef BASIC_VERSION
}

Updated on 2023-03-01 at 16:16:32 +0000