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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) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
/* adapted from FreeBSD:
* lib/msun/src/math_private.h
*/
#pragma once
#include <thrust/detail/config.h>
#include <thrust/complex.h>
#include <thrust/detail/cstdint.h>
THRUST_NAMESPACE_BEGIN
namespace detail{
namespace complex{
using thrust::complex;
typedef union
{
float value;
uint32_t word;
} ieee_float_shape_type;
__host__ __device__
inline void get_float_word(uint32_t & i, float d){
ieee_float_shape_type gf_u;
gf_u.value = (d);
(i) = gf_u.word;
}
__host__ __device__
inline void get_float_word(int32_t & i, float d){
ieee_float_shape_type gf_u;
gf_u.value = (d);
(i) = gf_u.word;
}
__host__ __device__
inline void set_float_word(float & d, uint32_t i){
ieee_float_shape_type sf_u;
sf_u.word = (i);
(d) = sf_u.value;
}
// Assumes little endian ordering
typedef union
{
double value;
struct
{
uint32_t lsw;
uint32_t msw;
} parts;
struct
{
uint64_t w;
} xparts;
} ieee_double_shape_type;
__host__ __device__ inline
void get_high_word(uint32_t & i,double d){
ieee_double_shape_type gh_u;
gh_u.value = (d);
(i) = gh_u.parts.msw;
}
/* Set the more significant 32 bits of a double from an int. */
__host__ __device__ inline
void set_high_word(double & d, uint32_t v){
ieee_double_shape_type sh_u;
sh_u.value = (d);
sh_u.parts.msw = (v);
(d) = sh_u.value;
}
__host__ __device__ inline
void insert_words(double & d, uint32_t ix0, uint32_t ix1){
ieee_double_shape_type iw_u;
iw_u.parts.msw = (ix0);
iw_u.parts.lsw = (ix1);
(d) = iw_u.value;
}
/* Get two 32 bit ints from a double. */
__host__ __device__ inline
void extract_words(uint32_t & ix0,uint32_t & ix1, double d){
ieee_double_shape_type ew_u;
ew_u.value = (d);
(ix0) = ew_u.parts.msw;
(ix1) = ew_u.parts.lsw;
}
/* Get two 32 bit ints from a double. */
__host__ __device__ inline
void extract_words(int32_t & ix0,int32_t & ix1, double d){
ieee_double_shape_type ew_u;
ew_u.value = (d);
(ix0) = ew_u.parts.msw;
(ix1) = ew_u.parts.lsw;
}
} // namespace complex
} // namespace detail
THRUST_NAMESPACE_END
#include <thrust/detail/complex/c99math.h>
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