Giorgio Arena | 7302302 | 2018-09-04 14:55:55 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2018 ARM Limited. |
| 3 | * |
| 4 | * SPDX-License-Identifier: MIT |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to |
| 8 | * deal in the Software without restriction, including without limitation the |
| 9 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all |
| 14 | * copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | #include "helpers.h" |
| 25 | |
| 26 | #if defined(TYPE) && defined(SELECT_TYPE) |
| 27 | |
| 28 | #define CONST_ONE 1.f |
| 29 | #define ABS_OP(a) fabs((a)) |
| 30 | #define ADD_OP(a, b) ((a) + (b)) |
| 31 | #define SUB_OP(a, b) ((a) - (b)) |
| 32 | #define MUL_OP(a, b) ((a) * (b)) |
| 33 | #define MLA_OP(a, b, c) ((b) * (c) + (a)) |
| 34 | #define DIV_OP(a, b) ((a) / (b)) |
| 35 | #define EXP_OP(a) exp((a)) |
| 36 | #define LOG_OP(a) log((a)) |
| 37 | #define SQRT_OP(a) sqrt((a)) |
| 38 | #define TANH_OP(a) tanh((a)) |
| 39 | |
| 40 | // Logistic Activation |
| 41 | inline TYPE logistic_op(TYPE x) |
| 42 | { |
| 43 | return DIV_OP((TYPE)CONST_ONE, ADD_OP((TYPE)CONST_ONE, EXP_OP(-x))); |
| 44 | } |
| 45 | // Hyperbolic Tangent Activation |
| 46 | inline TYPE tanh_op(TYPE x) |
| 47 | { |
| 48 | return MUL_OP((TYPE)A_VAL, TANH_OP(MUL_OP((TYPE)B_VAL, x))); |
| 49 | } |
| 50 | // RELU Tangent Activation |
| 51 | inline TYPE relu_op(TYPE x) |
| 52 | { |
| 53 | return max((TYPE)0, x); |
| 54 | } |
| 55 | // Bounded RELU Activation |
| 56 | inline TYPE brelu_op(TYPE x) |
| 57 | { |
| 58 | return min((TYPE)A_VAL, max((TYPE)0, x)); |
| 59 | } |
| 60 | // Lower Upper Bounded RELU Activation |
| 61 | inline TYPE lu_brelu_op(TYPE x) |
| 62 | { |
| 63 | return min(max(x, (TYPE)B_VAL), (TYPE)A_VAL); |
| 64 | } |
| 65 | // Leaky RELU Activation |
| 66 | inline TYPE lrelu_op(TYPE x) |
| 67 | { |
| 68 | return select(MUL_OP((TYPE)A_VAL, x), x, CONVERT(x > (TYPE)0, SELECT_TYPE)); |
| 69 | } |
| 70 | // Soft RELU Activation |
| 71 | inline TYPE srelu_op(TYPE x) |
| 72 | { |
Manuel Bottini | 0d0028c | 2018-10-02 16:41:52 +0100 | [diff] [blame] | 73 | return CONVERT(LOG_OP(ADD_OP((VEC_DATA_TYPE(float, VEC_SIZE))CONST_ONE, EXP_OP(CONVERT(x, VEC_DATA_TYPE(float, VEC_SIZE))))), TYPE); |
Giorgio Arena | 7302302 | 2018-09-04 14:55:55 +0100 | [diff] [blame] | 74 | } |
| 75 | // Absolute Activation |
| 76 | inline TYPE abs_op(TYPE x) |
| 77 | { |
| 78 | return ABS_OP(x); |
| 79 | } |
| 80 | // Square Activation |
| 81 | inline TYPE square_op(TYPE x) |
| 82 | { |
| 83 | return MUL_OP(x, x); |
| 84 | } |
| 85 | // Square-root Activation |
| 86 | inline TYPE sqrt_op(TYPE x) |
| 87 | { |
| 88 | return SQRT_OP(x); |
| 89 | } |
| 90 | // Linear Activation |
| 91 | inline TYPE linear_op(TYPE x) |
| 92 | { |
| 93 | return MLA_OP((TYPE)B_VAL, (TYPE)A_VAL, x); |
| 94 | } |
| 95 | |
| 96 | #define ACTIVATION_OP2(op, x) op##_op(x) |
| 97 | #define ACTIVATION_OP(op, x) ACTIVATION_OP2(op, x) |
| 98 | |
| 99 | #endif // defined(TYPE) && defined(SELECT_TYPE) |