Michel Iwaniec | 5dfeae6 | 2017-11-29 10:48:23 +0000 | [diff] [blame] | 1 | /* |
Michele Di Giorgio | d9eaf61 | 2020-07-08 11:12:57 +0100 | [diff] [blame] | 2 | * Copyright (c) 2017-2019 Arm Limited. |
Michel Iwaniec | 5dfeae6 | 2017-11-29 10:48:23 +0000 | [diff] [blame] | 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 | |
| 25 | #include "arm_compute/core/Rounding.h" |
| 26 | |
| 27 | #include "arm_compute/core/Error.h" |
| 28 | #include "support/ToolchainSupport.h" |
| 29 | |
| 30 | #include <cmath> |
| 31 | |
| 32 | using namespace arm_compute; |
| 33 | using namespace std; |
| 34 | |
| 35 | int arm_compute::round(float x, RoundingPolicy rounding_policy) |
| 36 | { |
| 37 | using namespace std; |
| 38 | int rounded = 0; |
| 39 | switch(rounding_policy) |
| 40 | { |
| 41 | case RoundingPolicy::TO_ZERO: |
| 42 | { |
| 43 | rounded = static_cast<int>(x); |
| 44 | break; |
| 45 | } |
| 46 | case RoundingPolicy::TO_NEAREST_UP: |
| 47 | { |
| 48 | rounded = static_cast<int>(support::cpp11::round(x)); |
| 49 | break; |
| 50 | } |
| 51 | case RoundingPolicy::TO_NEAREST_EVEN: |
| 52 | { |
John Kesapides | adfb273 | 2019-03-04 16:29:22 +0000 | [diff] [blame] | 53 | #ifdef __aarch64__ |
| 54 | asm("fcvtns %x[res], %s[value]" |
| 55 | : [res] "=r"(rounded) |
| 56 | : [value] "w"(x)); |
| 57 | #else // __aarch64__ |
Michel Iwaniec | 5dfeae6 | 2017-11-29 10:48:23 +0000 | [diff] [blame] | 58 | ARM_COMPUTE_ERROR("TO_NEAREST_EVEN rounding policy is not supported."); |
John Kesapides | adfb273 | 2019-03-04 16:29:22 +0000 | [diff] [blame] | 59 | #endif // __aarch64__ |
Michel Iwaniec | 5dfeae6 | 2017-11-29 10:48:23 +0000 | [diff] [blame] | 60 | break; |
| 61 | } |
| 62 | default: |
| 63 | { |
| 64 | ARM_COMPUTE_ERROR("Unsupported rounding policy."); |
| 65 | break; |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | return rounded; |
| 70 | } |