Created
January 21, 2018 21:38
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Simple roundFixedHalfToEven implementation compatible with my FixedPoints library
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/* | |
Copyright (C) 2018 Pharap (@Pharap) | |
Licensed under the Apache License, Version 2.0 (the "License"); | |
you may not use this file except in compliance with the License. | |
You may obtain a copy of the License at | |
http://www.apache.org/licenses/LICENSE-2.0 | |
Unless required by applicable law or agreed to in writing, software | |
distributed under the License is distributed on an "AS IS" BASIS, | |
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
See the License for the specific language governing permissions and | |
limitations under the License. | |
*/ | |
template< unsigned Integer, unsigned Fraction > constexpr UFixed<Integer, Fraction> roundFixedHalfToEven(const UFixed<Integer, Fraction> & value) | |
{ | |
using OutputType = UFixed<Integer, Fraction>; | |
return | |
((value.getInteger() & 1) != 0) | |
? ((value.getFraction() >= OutputType(0.5).getFraction()) ? ceilFixed(value) : floorFixed(value)) | |
: ((value.getFraction() <= OutputType(0.5).getFraction()) ? floorFixed(value) : ceilFixed(value)); | |
} | |
template< unsigned Integer, unsigned Fraction > constexpr SFixed<Integer, Fraction> roundFixedHalfToEven(const SFixed<Integer, Fraction> & value) | |
{ | |
using OutputType = SFixed<Integer, Fraction>; | |
return | |
signbitFixed(value) | |
? | |
( | |
((value.getInteger() & 1) != 0) | |
? ((value.getFraction() >= OutputType(0.5).getFraction()) ? ceilFixed(value) : floorFixed(value)) | |
: ((value.getFraction() <= OutputType(0.5).getFraction()) ? floorFixed(value) : ceilFixed(value)) | |
) | |
: | |
( | |
((value.getInteger() & 1) != 0) | |
? ((value.getFraction() >= OutputType(0.5).getFraction()) ? ceilFixed(value) : floorFixed(value)) | |
: ((value.getFraction() <= OutputType(0.5).getFraction()) ? floorFixed(value) : ceilFixed(value)) | |
); | |
} |
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