diff options
Diffstat (limited to 'sysdeps/m68k/fpu/s_cexp.c')
| -rw-r--r-- | sysdeps/m68k/fpu/s_cexp.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/sysdeps/m68k/fpu/s_cexp.c b/sysdeps/m68k/fpu/s_cexp.c new file mode 100644 index 0000000000..d5c76453e8 --- /dev/null +++ b/sysdeps/m68k/fpu/s_cexp.c @@ -0,0 +1,92 @@ +/* Complex exponential function. m68k fpu version + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#define __LIBC_M81_MATH_INLINES +#include <complex.h> +#include <math.h> + +#ifndef SUFF +#define SUFF +#endif +#ifndef huge_val +#define huge_val HUGE_VAL +#endif +#ifndef float_type +#define float_type double +#endif + +#define CONCATX(a,b) __CONCAT(a,b) +#define s(name) CONCATX(name,SUFF) +#define m81(func) __m81_u(s(func)) + +__complex__ float_type +s(__cexp) (__complex__ float_type x) +{ + __complex__ float_type retval; + float_type sin_ix, cos_ix; + + if (m81(__finite) (__real__ x)) + { + if (m81(__finite) (__imag__ x)) + { + float_type exp_val = s(__exp) (__real__ x); + + __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix) + : "f" (__imag__ x)); + __real__ retval = exp_val * cos_ix; + __imag__ retval = exp_val * sin_ix; + } + else + /* If the imaginary part is +-inf or NaN and the real part is + not +-inf the result is NaN + iNaN. */ + __real__ retval = __imag__ retval = 0.0/0.0; + } + else if (m81(__isinf) (__real__ x)) + { + if (m81(__finite) (__imag__ x)) + { + if (m81(__signbit) (__real__ x) == 0 && __imag__ x == 0.0) + retval = huge_val; + else + { + float_type value = m81(__signbit) (__real__ x) ? 0.0 : huge_val; + + __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix) + : "f" (__imag__ x)); + __real__ retval = value * cos_ix; + __imag__ retval = value * sin_ix; + } + } + else if (m81(__signbit) (__real__ x) == 0) + { + __real__ retval = huge_val; + __imag__ retval = 0.0/0.0; + } + else + retval = 0.0; + } + else + /* If the real part is NaN the result is NaN + iNaN. */ + __real__ retval = __imag__ retval = 0.0/0.0; + + return retval; +} +#define weak_aliasx(a,b) weak_alias(a,b) +weak_aliasx (s(__cexp), s(cexp)) |