1 /* Complex exponential function. m68k fpu version
2 Copyright (C) 1997, 1999 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 Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 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 Library General Public License for more details.
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If not,
18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
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 float_type exp_val
= m81(__ieee754_exp
) (__real__ x
);
49 __real__ retval
= __imag__ retval
= exp_val
;
50 if (m81(__finite
) (exp_val
))
52 float_type sin_ix
, cos_ix
;
53 __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix
), "=f" (cos_ix
)
55 __real__ retval
*= cos_ix
;
56 if (ix_cond
& __M81_COND_ZERO
)
57 __imag__ retval
= __imag__ x
;
59 __imag__ retval
*= sin_ix
;
63 /* Compute the sign of the result. */
64 float_type remainder
, pi_2
;
67 __asm ("fmovecr %#0,%0\n\tfscale%.w %#-1,%0" : "=f" (pi_2
));
68 __asm ("fmod%.x %2,%0\n\tfmove%.l %/fpsr,%1"
69 : "=f" (remainder
), "=dm" (quadrant
)
70 : "f" (pi_2
), "0" (__imag__ x
));
71 quadrant
= (quadrant
>> 16) & 0x83;
79 __real__ retval
= -__real__ retval
;
82 __real__ retval
= -__real__ retval
;
84 __imag__ retval
= -__imag__ retval
;
87 if (ix_cond
& __M81_COND_ZERO
&& !m81(__isnan
) (exp_val
))
88 __imag__ retval
= __imag__ x
;
93 unsigned long rx_cond
= __m81_test (__real__ x
);
95 if (rx_cond
& __M81_COND_INF
)
97 /* Real part is infinite. */
98 if (rx_cond
& __M81_COND_NEG
)
100 __real__ retval
= __imag__ retval
= 0.0;
101 if (ix_cond
& __M81_COND_NEG
)
102 __imag__ retval
= -__imag__ retval
;
106 __real__ retval
= __real__ x
;
107 __imag__ retval
= __imag__ x
- __imag__ x
;
111 __real__ retval
= __imag__ retval
= __imag__ x
- __imag__ x
;
116 #define weak_aliasx(a,b) weak_alias(a,b)
117 weak_aliasx (s(__cexp
), s(cexp
))