/usr/include/thrust/detail/complex/csinhf.h is in libthrust-dev 1.8.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright 2008-2013 NVIDIA Corporation
* Copyright 2013 Filipe RNC Maia
*
* 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.
*/
/*-
* Copyright (c) 2005 Bruce D. Evans and Steven G. Kargl
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* adapted from FreeBSD:
* lib/msun/src/s_csinhf.c
*/
#pragma once
#include <thrust/complex.h>
#include <thrust/detail/complex/math_private.h>
namespace thrust{
namespace detail{
namespace complex{
using thrust::complex;
__host__ __device__ inline
complex<float> csinhf(const complex<float>& z){
float x, y, h;
uint32_t hx, hy, ix, iy;
const float huge = 1.70141183460469231731687303716e+38; //0x1p127;
x = z.real();
y = z.imag();
get_float_word(hx, x);
get_float_word(hy, y);
ix = 0x7fffffff & hx;
iy = 0x7fffffff & hy;
if (ix < 0x7f800000 && iy < 0x7f800000) {
if (iy == 0)
return (complex<float>(sinhf(x), y));
if (ix < 0x41100000) /* small x: normal case */
return (complex<float>(sinhf(x) * cosf(y), coshf(x) * sinf(y)));
/* |x| >= 9, so cosh(x) ~= exp(|x|) */
if (ix < 0x42b17218) {
/* x < 88.7: expf(|x|) won't overflow */
h = expf(fabsf(x)) * 0.5f;
return (complex<float>(copysignf(h, x) * cosf(y), h * sinf(y)));
} else if (ix < 0x4340b1e7) {
/* x < 192.7: scale to avoid overflow */
complex<float> z_ = ldexp_cexpf(complex<float>(fabsf(x), y), -1);
return (complex<float>(z_.real() * copysignf(1.0f, x), z_.imag()));
} else {
/* x >= 192.7: the result always overflows */
h = huge * x;
return (complex<float>(h * cosf(y), h * h * sinf(y)));
}
}
if (ix == 0 && iy >= 0x7f800000)
return (complex<float>(copysignf(0, x * (y - y)), y - y));
if (iy == 0 && ix >= 0x7f800000) {
if ((hx & 0x7fffff) == 0)
return (complex<float>(x, y));
return (complex<float>(x, copysignf(0.0f, y)));
}
if (ix < 0x7f800000 && iy >= 0x7f800000)
return (complex<float>(y - y, x * (y - y)));
if (ix >= 0x7f800000 && (hx & 0x7fffff) == 0) {
if (iy >= 0x7f800000)
return (complex<float>(x * x, x * (y - y)));
return (complex<float>(x * cosf(y), infinity<float>() * sinf(y)));
}
return (complex<float>((x * x) * (y - y), (x + x) * (y - y)));
}
__host__ __device__ inline
complex<float> csinf(complex<float> z){
z = csinhf(complex<float>(-z.imag(), z.real()));
return (complex<float>(z.imag(), -z.real()));
}
} // namespace complex
} // namespace detail
template <>
__host__ __device__
inline complex<float> sin(const complex<float>& z){
return detail::complex::csinf(z);
}
template <>
__host__ __device__
inline complex<float> sinh(const complex<float>& z){
return detail::complex::csinhf(z);
}
} // namespace thrust
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