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/*
* 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;
}
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