Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/math/s_csinhf.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
166 lines (148 sloc)
3.98 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* Complex sine hyperbole function for float. | |
Copyright (C) 1997-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <complex.h> | |
#include <fenv.h> | |
#include <math.h> | |
#include <math_private.h> | |
#include <float.h> | |
__complex__ float | |
__csinhf (__complex__ float x) | |
{ | |
__complex__ float retval; | |
int negate = signbit (__real__ x); | |
int rcls = fpclassify (__real__ x); | |
int icls = fpclassify (__imag__ x); | |
__real__ x = fabsf (__real__ x); | |
if (__glibc_likely (rcls >= FP_ZERO)) | |
{ | |
/* Real part is finite. */ | |
if (__glibc_likely (icls >= FP_ZERO)) | |
{ | |
/* Imaginary part is finite. */ | |
const int t = (int) ((FLT_MAX_EXP - 1) * M_LN2); | |
float sinix, cosix; | |
if (__glibc_likely (fabsf (__imag__ x) > FLT_MIN)) | |
{ | |
__sincosf (__imag__ x, &sinix, &cosix); | |
} | |
else | |
{ | |
sinix = __imag__ x; | |
cosix = 1.0f; | |
} | |
if (negate) | |
cosix = -cosix; | |
if (fabsf (__real__ x) > t) | |
{ | |
float exp_t = __ieee754_expf (t); | |
float rx = fabsf (__real__ x); | |
if (signbit (__real__ x)) | |
cosix = -cosix; | |
rx -= t; | |
sinix *= exp_t / 2.0f; | |
cosix *= exp_t / 2.0f; | |
if (rx > t) | |
{ | |
rx -= t; | |
sinix *= exp_t; | |
cosix *= exp_t; | |
} | |
if (rx > t) | |
{ | |
/* Overflow (original real part of x > 3t). */ | |
__real__ retval = FLT_MAX * cosix; | |
__imag__ retval = FLT_MAX * sinix; | |
} | |
else | |
{ | |
float exp_val = __ieee754_expf (rx); | |
__real__ retval = exp_val * cosix; | |
__imag__ retval = exp_val * sinix; | |
} | |
} | |
else | |
{ | |
__real__ retval = __ieee754_sinhf (__real__ x) * cosix; | |
__imag__ retval = __ieee754_coshf (__real__ x) * sinix; | |
} | |
math_check_force_underflow_complex (retval); | |
} | |
else | |
{ | |
if (rcls == FP_ZERO) | |
{ | |
/* Real part is 0.0. */ | |
__real__ retval = __copysignf (0.0, negate ? -1.0 : 1.0); | |
__imag__ retval = __nanf ("") + __nanf (""); | |
if (icls == FP_INFINITE) | |
feraiseexcept (FE_INVALID); | |
} | |
else | |
{ | |
__real__ retval = __nanf (""); | |
__imag__ retval = __nanf (""); | |
feraiseexcept (FE_INVALID); | |
} | |
} | |
} | |
else if (__glibc_likely (rcls == FP_INFINITE)) | |
{ | |
/* Real part is infinite. */ | |
if (__glibc_likely (icls > FP_ZERO)) | |
{ | |
/* Imaginary part is finite. */ | |
float sinix, cosix; | |
if (__glibc_likely (fabsf (__imag__ x) > FLT_MIN)) | |
{ | |
__sincosf (__imag__ x, &sinix, &cosix); | |
} | |
else | |
{ | |
sinix = __imag__ x; | |
cosix = 1.0f; | |
} | |
__real__ retval = __copysignf (HUGE_VALF, cosix); | |
__imag__ retval = __copysignf (HUGE_VALF, sinix); | |
if (negate) | |
__real__ retval = -__real__ retval; | |
} | |
else if (icls == FP_ZERO) | |
{ | |
/* Imaginary part is 0.0. */ | |
__real__ retval = negate ? -HUGE_VALF : HUGE_VALF; | |
__imag__ retval = __imag__ x; | |
} | |
else | |
{ | |
/* The addition raises the invalid exception. */ | |
__real__ retval = HUGE_VALF; | |
__imag__ retval = __nanf ("") + __nanf (""); | |
#ifdef FE_INVALID | |
if (icls == FP_INFINITE) | |
feraiseexcept (FE_INVALID); | |
#endif | |
} | |
} | |
else | |
{ | |
__real__ retval = __nanf (""); | |
__imag__ retval = __imag__ x == 0.0 ? __imag__ x : __nanf (""); | |
} | |
return retval; | |
} | |
#ifndef __csinhf | |
weak_alias (__csinhf, csinhf) | |
#endif |