| /* |
| * Copyright (c) 2018 ARM Limited. |
| * |
| * SPDX-License-Identifier: MIT |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in all |
| * copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| #ifdef DATA_TYPE_FP32 |
| precision highp float; |
| #elif defined(DATA_TYPE_FP16) |
| #if defined(LOGISTIC) || defined(TANH) || defined(SRELU) || defined(SQRT) |
| precision highp float; |
| #else /*LOGISTIC_TANH_SRELU_SQRT*/ |
| precision mediump float; |
| #endif /*LOGISTIC_TANH_SRELU_SQRT*/ |
| #endif /*DATA_TYPE_FP32*/ |
| |
| #define ABS_OP(a) abs((a)) |
| #define ADD_OP(a, b) ((a) + (b)) |
| #define SUB_OP(a, b) ((a) - (b)) |
| #define MUL_OP(a, b) ((a) * (b)) |
| #define MLA_OP(a, b, c) ((b) * (c) + (a)) |
| #define DIV_OP(a, b) ((a) / (b)) |
| #define EXP_OP(a) exp((a)) |
| #define LOG_OP(a) log((a)) |
| #define SQRT_OP(a) sqrt((a)) |
| #define CONST_ONE (1.f) |
| |
| // Logistic Activation |
| float logistic_op(float x) |
| { |
| return DIV_OP(CONST_ONE, ADD_OP(CONST_ONE, EXP_OP(-x))); |
| } |
| vec4 logistic_op(vec4 x) |
| { |
| return DIV_OP(vec4(CONST_ONE), ADD_OP(CONST_ONE, EXP_OP(-x))); |
| } |
| // Hyperbolic Tangent Activation |
| float tanh_op(float x) |
| { |
| float tmp = float(B_VAL) * x; |
| if(tmp > 10.f) |
| { |
| return MUL_OP(float(A_VAL), 1.f); |
| } |
| else if(tmp < -10.f) |
| { |
| return MUL_OP(float(A_VAL), -1.f); |
| } |
| else |
| { |
| return MUL_OP(float(A_VAL), tanh(tmp + 0.000001f)); |
| } |
| } |
| // RELU Tangent Activation |
| float relu_op(float x) |
| { |
| return max(0.f, x); |
| } |
| vec4 relu_op(vec4 x) |
| { |
| return max(vec4(0.f), x); |
| } |
| // Bounded RELU Activation |
| float brelu_op(float x) |
| { |
| return min(float(A_VAL), max(float(0.0), x)); |
| } |
| // Lower Upper Bounded RELU Activation |
| float lu_brelu_op(float x) |
| { |
| return min(max(x, float(B_VAL)), float(A_VAL)); |
| } |
| // Leaky RELU Activation |
| float lrelu_op(float x) |
| { |
| return (x > float(0.0)) ? x : MUL_OP(float(A_VAL), x); |
| } |
| // Soft RELU Activation |
| float srelu_op(float x) |
| { |
| return LOG_OP(ADD_OP(CONST_ONE, EXP_OP(x))); |
| } |
| // Absolute Activation |
| float abs_op(float x) |
| { |
| return ABS_OP(x); |
| } |
| // Square Activation |
| float square_op(float x) |
| { |
| return MUL_OP(x, x); |
| } |
| // Square-root Activation |
| float sqrt_op(float x) |
| { |
| return SQRT_OP(x); |
| } |
| // Linear Activation |
| float linear_op(float x) |
| { |
| return MLA_OP(float(B_VAL), float(A_VAL), x); |
| } |