| /* |
| * Copyright (c) 2017-2019 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. |
| */ |
| |
| #include "arm_compute/core/Rounding.h" |
| |
| #include "arm_compute/core/Error.h" |
| #include "support/ToolchainSupport.h" |
| |
| #include <cmath> |
| |
| using namespace arm_compute; |
| using namespace std; |
| |
| int arm_compute::round(float x, RoundingPolicy rounding_policy) |
| { |
| using namespace std; |
| int rounded = 0; |
| switch(rounding_policy) |
| { |
| case RoundingPolicy::TO_ZERO: |
| { |
| rounded = static_cast<int>(x); |
| break; |
| } |
| case RoundingPolicy::TO_NEAREST_UP: |
| { |
| rounded = static_cast<int>(support::cpp11::round(x)); |
| break; |
| } |
| case RoundingPolicy::TO_NEAREST_EVEN: |
| { |
| #ifdef __aarch64__ |
| asm("fcvtns %x[res], %s[value]" |
| : [res] "=r"(rounded) |
| : [value] "w"(x)); |
| #else // __aarch64__ |
| ARM_COMPUTE_ERROR("TO_NEAREST_EVEN rounding policy is not supported."); |
| #endif // __aarch64__ |
| break; |
| } |
| default: |
| { |
| ARM_COMPUTE_ERROR("Unsupported rounding policy."); |
| break; |
| } |
| } |
| |
| return rounded; |
| } |