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/github/workspace/src/MatrixFunctions/mat_scale/kernels/plp_mat_scale_i8p_xpulpv2.c

Functions

Name
void plp_mat_scale_i8p_xpulpv2(void * args)
Parallel matrix scale of 8-bit integer matrices kernel for XPULPV2 extension.

Defines

Name
BASIC_VERSION

Functions Documentation

function plp_mat_scale_i8p_xpulpv2

void plp_mat_scale_i8p_xpulpv2(
    void * args
)

Parallel matrix scale of 8-bit integer matrices kernel for XPULPV2 extension.

Parameters:

Return: none

Par: Exploiting SIMD instructions

The 8 bit values are packed four each into 32 bit vectors and then the four dot products are performed on 32 bit vectors, with 32 bit accumulator.

Macros Documentation

define BASIC_VERSION

#define BASIC_VERSION

Source code

/* =====================================================================
 * Project:      PULP DSP Library
 * Title:        plp_mat_scale_i8p_xpulpv2.c
 * Description:  parallel 8-bit integer matrix scale for XPULPV2
 *
 * $Date:        6. July 2020
 * $Revision:    V0
 *
 * Target Processor: PULP cores
 * ===================================================================== */
/*
 * Copyright (C) 2020 ETH Zurich and University of Bologna.
 *
 * 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_mat_scale_i8p_xpulpv2(void *args) {

    int core_id = hal_core_id();

    plp_mat_scale_instance_i8 *a = (plp_mat_scale_instance_i8 *)args;

    const int8_t *__restrict__ pSrc = a->pSrc;
    uint32_t M = a->M;
    uint32_t N = a->N;
    int8_t scaleFactor = a->scaleFactor;
    int32_t shift = a->shift;
    uint32_t nPE = a->nPE;
    int8_t *__restrict__ pDst = a->pDst;

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

    for (int m = core_id; m < M; m += nPE) {
        for (int n = 0; n < N; n++) {
            int32_t val = ((int32_t)pSrc[m * N + n]) * ((int32_t)scaleFactor);
            pDst[m * N + n] = (int8_t)(val >> shift);
        }
    }

#else

    // TODO: Hackathon

#endif
#undef BASIC_VERSION
}

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