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/*
* 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.
*/
#include "ref_functions.h"
void arm_fully_connected_q15_opt_ref(const q15_t * pV, // pointer to vector
const q15_t * pM, // pointer to matrix
const uint16_t dim_vec, // length of the vector
const uint16_t num_of_rows, // numCol of A
const uint16_t bias_shift, // amount of left-shift for bias
const uint16_t out_shift, // amount of right-shift for output
const q15_t * bias, q15_t * pOut, // output operand
q15_t * vec_buffer)
{
uint16_t rowCnt = num_of_rows >> 2;
const q15_t *pB = pM;
const q15_t *pA;
q15_t *pO = pOut;
const q15_t *pBias = bias;
while (rowCnt)
{
pA = pV;
#ifndef ARM_NN_TRUNCATE
q31_t sum = (*pBias++ << bias_shift) + (0x1 << (out_shift - 1));
q31_t sum2 = (*pBias++ << bias_shift) + (0x1 << (out_shift - 1));
q31_t sum3 = (*pBias++ << bias_shift) + (0x1 << (out_shift - 1));
q31_t sum4 = (*pBias++ << bias_shift) + (0x1 << (out_shift - 1));
#else
q31_t sum = *pBias++ << bias_shift;
q31_t sum2 = *pBias++ << bias_shift;
q31_t sum3 = *pBias++ << bias_shift;
q31_t sum4 = *pBias++ << bias_shift;
#endif
uint16_t colCnt = dim_vec >> 1;
while (colCnt)
{
q15_t inA1 = *pA++;
q15_t inA2 = *pA++;
q15_t inB1 = *pB++;
q15_t inB2 = *pB++;
sum += inA1 * inB1 + inA2 * inB2;
inB1 = *pB++;
inB2 = *pB++;
sum2 += inA1 * inB1 + inA2 * inB2;
inB1 = *pB++;
inB2 = *pB++;
sum3 += inA1 * inB1 + inA2 * inB2;
inB1 = *pB++;
inB2 = *pB++;
sum4 += inA1 * inB1 + inA2 * inB2;
colCnt--;
}
colCnt = dim_vec & 0x1;
while (colCnt)
{
q15_t inA = *pA++;
q15_t inB = *pB++;
sum += inA * inB;
inB = *pB++;
sum2 += inA * inB;
inB = *pB++;
sum3 += inA * inB;
inB = *pB++;
sum4 += inA * inB;
colCnt--;
}
*pO++ = (q15_t) __SSAT((sum >> out_shift), 16);
*pO++ = (q15_t) __SSAT((sum2 >> out_shift), 16);
*pO++ = (q15_t) __SSAT((sum3 >> out_shift), 16);
*pO++ = (q15_t) __SSAT((sum4 >> out_shift), 16);
rowCnt--;
}
rowCnt = num_of_rows & 0x3;
while (rowCnt)
{
pA = pV;
#ifndef ARM_NN_TRUNCATE
int ip_out = (*pBias++ << bias_shift) + (0x1 << (out_shift - 1));
#else
int ip_out = *pBias++ << bias_shift;
#endif
for (int j = 0; j < dim_vec; j++)
{
q15_t inA = *pA++;
q15_t inB = *pB++;
ip_out += inA * inB;
}
*pO++ = (q15_t) __SSAT((ip_out >> out_shift), 16);
rowCnt--;
}
}
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