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/* Copyright 2023 Yann ORLAREY
*
* 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.
*/
#include <algorithm>
#include <functional>
#include <random>
#include "check.hh"
#include "interval_algebra.hh"
#include "interval_def.hh"
namespace itv {
//------------------------------------------------------------------------------------------
// Interval Sinh
// interval Sinh(const interval& x);
// void testSinh();
interval interval_algebra::Sinh(const interval& x)
{
if (x.isEmpty()) {
return empty();
}
double v = 0; // absolute lowest slope is at zero
int sign = 1;
// if zero is not included, lowest slope is at the boundary of lowest absolute value
if (!x.hasZero()) {
v = minValAbs(x);
sign = signMinValAbs(x);
}
int precision = exactPrecisionUnary(sinh, v, sign * pow(2, x.lsb()));
if ((precision == INT_MIN) || taylor_lsb) {
precision = floor(x.lsb() + log2(cosh(v)));
}
return {sinh(x.lo()), sinh(x.hi()), precision};
}
void interval_algebra::testSinh()
{
analyzeUnaryMethod(10, 1000, "sinh", interval(-10, 10, 0), sinh, &interval_algebra::Sinh);
analyzeUnaryMethod(10, 1000, "sinh", interval(-10, 10, -5), sinh, &interval_algebra::Sinh);
analyzeUnaryMethod(10, 1000, "sinh", interval(-10, 10, -10), sinh, &interval_algebra::Sinh);
analyzeUnaryMethod(10, 1000, "sinh", interval(-10, 10, -15), sinh, &interval_algebra::Sinh);
analyzeUnaryMethod(10, 1000, "sinh", interval(-10, 10, -20), sinh, &interval_algebra::Sinh);
}
} // namespace itv
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