1 /* Complex exponential function. m68k fpu version
2 Copyright (C) 1997-2015 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library. If not, see
18 <http://www.gnu.org/licenses/>. */
29 #define float_type double
32 #define CONCATX(a,b) __CONCAT(a,b)
33 #define s(name) CONCATX(name,SUFF)
34 #define m81(func) __m81_u(s(func))
36 __complex__ float_type
37 s(__cexp
) (__complex__ float_type x
)
39 __complex__ float_type retval
;
40 unsigned long ix_cond
;
42 ix_cond
= __m81_test (__imag__ x
);
44 if ((ix_cond
& (__M81_COND_NAN
|__M81_COND_INF
)) == 0)
46 /* Imaginary part is finite. */
47 unsigned long rx_cond
= __m81_test (__real__ x
);
49 if ((rx_cond
& (__M81_COND_NAN
|__M81_COND_INF
)) == 0)
51 const int t
= (int) ((LDBL_MAX_EXP
- 1) * M_LN2l
);
52 long double sin_ix
, cos_ix
, exp_val
;
54 __m81_u (__sincosl
) (__imag__ x
, &sin_ix
, &cos_ix
);
58 long double exp_t
= __m81_u(__ieee754_expl
) (t
);
70 exp_val
= __m81_u(__ieee754_expl
) (__real__ x
);
71 __real__ retval
= exp_val
* cos_ix
;
72 if (ix_cond
& __M81_COND_ZERO
)
73 __imag__ retval
= __imag__ x
;
75 __imag__ retval
= exp_val
* sin_ix
;
79 /* Compute the sign of the result. */
80 long double remainder
, pi_2
;
83 if ((rx_cond
& (__M81_COND_NAN
|__M81_COND_NEG
)) == __M81_COND_NEG
)
84 __real__ retval
= __imag__ retval
= 0.0;
86 __real__ retval
= __imag__ retval
= __real__ x
;
87 __asm ("fmovecr %#0,%0\n\tfscale%.w %#-1,%0" : "=f" (pi_2
));
88 __asm ("fmod%.x %2,%0\n\tfmove%.l %/fpsr,%1"
89 : "=f" (remainder
), "=dm" (quadrant
)
90 : "f" (pi_2
), "0" (__imag__ x
));
91 quadrant
= (quadrant
>> 16) & 0x83;
99 __real__ retval
= -__real__ retval
;
102 __real__ retval
= -__real__ retval
;
104 __imag__ retval
= -__imag__ retval
;
107 if (ix_cond
& __M81_COND_ZERO
&& (rx_cond
& __M81_COND_NAN
) == 0)
108 __imag__ retval
= __imag__ x
;
113 unsigned long rx_cond
= __m81_test (__real__ x
);
115 if (rx_cond
& __M81_COND_INF
)
117 /* Real part is infinite. */
118 if (rx_cond
& __M81_COND_NEG
)
120 __real__ retval
= __imag__ retval
= 0.0;
121 if (ix_cond
& __M81_COND_NEG
)
122 __imag__ retval
= -__imag__ retval
;
126 __real__ retval
= __real__ x
;
127 __imag__ retval
= __imag__ x
- __imag__ x
;
131 __real__ retval
= __imag__ retval
= __imag__ x
- __imag__ x
;
136 weak_alias (s(__cexp
), s(cexp
))