| /* |
| * 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. |
| */ |
| |
| #ifndef TFLM_OPT_UTIL_H_ |
| #define TFLM_OPT_UTIL_H_ |
| |
| #include <algorithm> |
| #include <cstdint> |
| |
| #define LEFT_SHIFT(_shift) std::max(_shift, 0L) |
| #define RIGHT_SHIFT(_shift) -std::min(_shift, 0L) |
| |
| // Use this in place of Tensorflow's |
| // MultiplyByQuantizedMultiplierSmallerThanOneExp |
| #define rescale_internal(Vd, Vs, Vscratch, mult, shift, offset, m) \ |
| do { \ |
| int32_t _shift = RIGHT_SHIFT(shift); \ |
| vdmulh_w_r_vx##m(Vd, Vs, mult); \ |
| vdup_w_x##m(Vscratch, -_shift); \ |
| vand_vv##m(Vscratch, Vscratch, Vd); \ |
| vsra_w_vx##m(Vscratch, Vscratch, 31); \ |
| vadd_w_vv##m(Vd, Vd, Vscratch); \ |
| vsha_w_r_vx##m(Vd, Vd, _shift); \ |
| vadd_w_vx##m(Vd, Vd, offset); \ |
| } while (0); |
| |
| #define rescale(Vd, Vs, Vscratch, mult, shift, offset) \ |
| rescale_internal(Vd, Vs, Vscratch, mult, shift, \ |
| offset, ); // NOLINT(whitespace/parens) |
| #define rescale_m(Vd, Vs, Vscratch, mult, shift, offset) \ |
| rescale_internal(Vd, Vs, Vscratch, mult, shift, offset, _m); |
| |
| #endif // TFLM_OPT_UTIL_H_ |