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/*
* Copyright (C) 2010-2022 Arm Limited or its affiliates.
*
* 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_elementwise_mul_s8
* Description: Element wise multiplication
*
* $Date: 3 Februari 2022
* $Revision: V.1.1.0
*
* Target Processor: Cortex-M cores
*
* -------------------------------------------------------------------- */
#include "arm_nnfunctions.h"
#include "arm_nnsupportfunctions.h"
/**
* @ingroup groupNN
*/
/**
* @addtogroup BasicMath
* @{
*/
/**
* @brief s8 element wise multiplication of two vectors
*
* @note Refer header file for details.
*
*/
arm_status arm_elementwise_mul_s8(const int8_t *input_1_vect,
const int8_t *input_2_vect,
const int32_t input_1_offset,
const int32_t input_2_offset,
int8_t *output,
const int32_t out_offset,
const int32_t out_mult,
const int32_t out_shift,
const int32_t out_activation_min,
const int32_t out_activation_max,
const int32_t block_size)
{
int32_t loop_count;
#if defined(ARM_MATH_MVEI)
loop_count = (block_size + 3) / 4;
uint32_t num_elements = block_size;
for (int i = 0; i < loop_count; i++)
{
mve_pred16_t p = vctp32q(num_elements);
int32x4_t input_1 = vldrbq_z_s32(input_1_vect, p);
input_1 = vaddq_n_s32(input_1, input_1_offset);
int32x4_t input_2 = vldrbq_z_s32(input_2_vect, p);
input_2 = vaddq_n_s32(input_2, input_2_offset);
int32x4_t res_0 = vmulq_s32(input_1, input_2);
res_0 = arm_requantize_mve_32x4(res_0, vdupq_n_s32(out_mult), vdupq_n_s32(out_shift));
res_0 += vdupq_n_s32(out_offset);
res_0 = vmaxq_s32(res_0, vdupq_n_s32(out_activation_min));
res_0 = vminq_s32(res_0, vdupq_n_s32(out_activation_max));
vstrbq_p_s32(output, res_0, p);
input_1_vect += 4;
input_2_vect += 4;
output += 4;
num_elements -= 4;
}
#else
int32_t input_1;
int32_t input_2;
int32_t mul_res;
#if defined(ARM_MATH_DSP)
int32_t a_1, b_1, a_2, b_2;
int32_t offset_1_packed, offset_2_packed;
int8_t r1, r2, r3, r4;
offset_1_packed = (input_1_offset << 16U) | (input_1_offset & 0x0FFFFL);
offset_2_packed = (input_2_offset << 16U) | (input_2_offset & 0x0FFFFL);
loop_count = block_size >> 2;
while (loop_count > 0)
{
/* 4 outputs are calculated in one loop. The order of calculation is follows the order of output sign extension
intrinsic */
input_1_vect = read_and_pad_reordered(input_1_vect, &b_1, &a_1);
input_2_vect = read_and_pad_reordered(input_2_vect, &b_2, &a_2);
a_1 = __SADD16(a_1, offset_1_packed);
b_1 = __SADD16(b_1, offset_1_packed);
a_2 = __SADD16(a_2, offset_2_packed);
b_2 = __SADD16(b_2, offset_2_packed);
/* Mul 1 */
input_1 = (int16_t)(b_1 & 0x0FFFFL);
input_2 = (int16_t)(b_2 & 0x0FFFFL);
mul_res = input_1 * input_2;
mul_res = arm_nn_requantize(mul_res, out_mult, out_shift) + out_offset;
mul_res = MAX(mul_res, out_activation_min);
mul_res = MIN(mul_res, out_activation_max);
r1 = (q7_t)mul_res;
/* Mul 3 */
input_1 = (int16_t)((b_1 >> 16U) & 0x0FFFFL);
input_2 = (int16_t)((b_2 >> 16U) & 0x0FFFFL);
mul_res = input_1 * input_2;
mul_res = arm_nn_requantize(mul_res, out_mult, out_shift) + out_offset;
mul_res = MAX(mul_res, out_activation_min);
mul_res = MIN(mul_res, out_activation_max);
r3 = (q7_t)mul_res;
/* Mul 2 */
input_1 = (int16_t)(a_1 & 0x0FFFFL);
input_2 = (int16_t)(a_2 & 0x0FFFFL);
mul_res = input_1 * input_2;
mul_res = arm_nn_requantize(mul_res, out_mult, out_shift) + out_offset;
mul_res = MAX(mul_res, out_activation_min);
mul_res = MIN(mul_res, out_activation_max);
r2 = (q7_t)mul_res;
/* Mul 4 */
input_1 = (int16_t)((a_1 >> 16U) & 0x0FFFFL);
input_2 = (int16_t)((a_2 >> 16U) & 0x0FFFFL);
mul_res = input_1 * input_2;
mul_res = arm_nn_requantize(mul_res, out_mult, out_shift) + out_offset;
mul_res = MAX(mul_res, out_activation_min);
mul_res = MIN(mul_res, out_activation_max);
r4 = (q7_t)mul_res;
arm_nn_write_q7x4_ia(&output, PACK_Q7x4_32x1(r1, r2, r3, r4));
loop_count--;
}
loop_count = block_size & 0x3;
#else
loop_count = block_size;
#endif
while (loop_count > 0)
{
/* C = A * B */
input_1 = *input_1_vect++ + input_1_offset;
input_2 = *input_2_vect++ + input_2_offset;
mul_res = input_1 * input_2;
mul_res = arm_nn_requantize(mul_res, out_mult, out_shift) + out_offset;
mul_res = MAX(mul_res, out_activation_min);
mul_res = MIN(mul_res, out_activation_max);
*output++ = (q7_t)mul_res;
/* Decrement loop counter */
loop_count--;
}
#endif
return ARM_MATH_SUCCESS;
}
/**
* @} end of BasicMath group
*/
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