You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
2.3 KiB
110 lines
2.3 KiB
/*
|
|
* Copyright (C) 2010-2018 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.
|
|
*/
|
|
|
|
/* ----------------------------------------------------------------------
|
|
* Project: CMSIS NN Library
|
|
* Title: arm_relu_q7.c
|
|
* Description: Q7 version of ReLU
|
|
*
|
|
* $Date: 17. January 2018
|
|
* $Revision: V.1.0.0
|
|
*
|
|
* Target Processor: Cortex-M cores
|
|
*
|
|
* -------------------------------------------------------------------- */
|
|
|
|
#include "arm_math.h"
|
|
#include "arm_nnfunctions.h"
|
|
|
|
/**
|
|
* @ingroup groupNN
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup Acti
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @brief Q7 RELU function
|
|
* @param[in,out] data pointer to input
|
|
* @param[in] size number of elements
|
|
* @return none.
|
|
*
|
|
* @details
|
|
*
|
|
* Optimized relu with QSUB instructions.
|
|
*
|
|
*/
|
|
|
|
void arm_relu_q7(q7_t * data, uint16_t size)
|
|
{
|
|
|
|
#if defined (ARM_MATH_DSP)
|
|
/* Run the following code for Cortex-M4 and Cortex-M7 */
|
|
|
|
uint16_t i = size >> 2;
|
|
q7_t *pIn = data;
|
|
q7_t *pOut = data;
|
|
q31_t in;
|
|
q31_t buf;
|
|
q31_t mask;
|
|
|
|
while (i)
|
|
{
|
|
in = *__SIMD32(pIn)++;
|
|
|
|
/* extract the first bit */
|
|
buf = __ROR(in & 0x80808080, 7);
|
|
|
|
/* if MSB=1, mask will be 0xFF, 0x0 otherwise */
|
|
mask = __QSUB8(0x00000000, buf);
|
|
|
|
*__SIMD32(pOut)++ = in & (~mask);
|
|
i--;
|
|
}
|
|
|
|
i = size & 0x3;
|
|
while (i)
|
|
{
|
|
if (*pIn < 0)
|
|
{
|
|
*pIn = 0;
|
|
}
|
|
pIn++;
|
|
i--;
|
|
}
|
|
|
|
#else
|
|
/* Run the following code as reference implementation for Cortex-M0 and Cortex-M3 */
|
|
|
|
uint16_t i;
|
|
|
|
for (i = 0; i < size; i++)
|
|
{
|
|
if (data[i] < 0)
|
|
data[i] = 0;
|
|
}
|
|
|
|
#endif /* ARM_MATH_DSP */
|
|
|
|
}
|
|
|
|
/**
|
|
* @} end of Acti group
|
|
*/
|
|
|