| /* |
| * Copyright 2023 Google LLC |
| * |
| * 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 |
| * |
| * http://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 "crt/kelvin.h" |
| #include "tflm/opt/opt.h" |
| #include "tflm/opt/util.h" |
| |
| namespace kelvin::opt { |
| |
| void elementwise_add_s16(const int16_t* input1, const int16_t* input2, |
| const int32_t input1_offset, const int32_t input1_mult, |
| const int32_t input1_shift, |
| const int32_t input2_offset, const int32_t input2_mult, |
| const int32_t input2_shift, const int32_t left_shift, |
| int16_t* output, const int32_t output_offset, |
| const int32_t output_mult, const int32_t output_shift, |
| const int32_t output_activation_min, |
| const int32_t output_activation_max, |
| const int32_t block_size) { |
| int blocks = block_size; |
| int vl; |
| getmaxvl_h(vl); |
| while (blocks) { |
| int count = std::min(blocks, vl); |
| |
| // Widen input1 to 32-bit wide values (in vm0, vm1). |
| vld_h_lp_xx_m(vm0, input1, count); |
| vaddw_w_vx_m(vm0, vm0, input1_offset); |
| |
| // Widen input2 to 32-bit wide values (in vm2, vm3). |
| vld_h_lp_xx_m(vm2, input2, count); |
| vaddw_w_vx_m(vm2, vm2, input2_offset); |
| |
| // Apply left_shift to all inputs. |
| vsll_w_vx_m(vm0, vm0, left_shift); |
| vsll_w_vx_m(vm1, vm1, left_shift); |
| vsll_w_vx_m(vm2, vm2, left_shift); |
| vsll_w_vx_m(vm3, vm3, left_shift); |
| |
| int32_t input1_shift_mul = 1 << LEFT_SHIFT(input1_shift); |
| int32_t input2_shift_mul = 1 << LEFT_SHIFT(input2_shift); |
| vmul_w_vx_m(vm0, vm0, input1_shift_mul); |
| vmul_w_vx_m(vm1, vm1, input1_shift_mul); |
| vmul_w_vx_m(vm2, vm2, input2_shift_mul); |
| vmul_w_vx_m(vm3, vm3, input2_shift_mul); |
| |
| rescale_m(vm0, vm0, vm15, input1_mult, input1_shift, input1_offset); |
| rescale_m(vm1, vm1, vm15, input1_mult, input1_shift, input1_offset); |
| rescale_m(vm2, vm2, vm15, input2_mult, input2_shift, input2_offset); |
| rescale_m(vm3, vm3, vm15, input2_mult, input2_shift, input2_offset); |
| |
| // Sum the rescaled inputs. |
| vadd_w_vv_m(vm0, vm0, vm2); |
| vadd_w_vv_m(vm1, vm1, vm3); |
| |
| // Rescale the summed output. |
| rescale_m(vm0, vm0, vm15, output_mult, output_shift, output_offset); |
| rescale_m(vm1, vm1, vm15, output_mult, output_shift, output_offset); |
| |
| // Clamp to the provided range. |
| vmin_w_vx_m(vm0, vm0, output_activation_max); |
| vmin_w_vx_m(vm1, vm1, output_activation_max); |
| vmax_w_vx_m(vm0, vm0, output_activation_min); |
| vmax_w_vx_m(vm1, vm1, output_activation_min); |
| |
| // Swizzle and narrow back to bytes. |
| vand_w_vx_m(vm0, vm0, 0xFFFF); |
| vand_w_vx_m(vm1, vm1, 0xFFFF); |
| vsll_w_vx_m(vm1, vm1, 16); |
| vor_vv_m(vm0, vm0, vm1); |
| |
| // Store to memory. |
| vst_h_lp_xx_m(vm0, output, count); |
| |
| blocks -= count; |
| } |
| } |
| |
| } // namespace kelvin::opt |