1 /* Complex cosine 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(__ccos
) (__complex__ float_type x
)
39 __complex__ float_type retval
;
40 unsigned long rx_cond
= __m81_test (__real__ x
);
42 if ((rx_cond
& (__M81_COND_INF
|__M81_COND_NAN
)) == 0)
44 /* Real part is finite. */
45 float_type sin_rx
, cos_rx
;
47 __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_rx
), "=f" (cos_rx
)
49 __real__ retval
= cos_rx
* m81(__ieee754_cosh
) (__imag__ x
);
50 if (rx_cond
& __M81_COND_ZERO
)
51 __imag__ retval
= (m81(__signbit
) (__imag__ x
)
52 ? __real__ x
: -__real__ x
);
54 __imag__ retval
= -sin_rx
* m81(__ieee754_sinh
) (__imag__ x
);
58 unsigned long ix_cond
= __m81_test (__imag__ x
);
60 if (ix_cond
& __M81_COND_INF
)
61 __real__ retval
= s(fabs
) (__imag__ x
);
63 __real__ retval
= __real__ x
- __real__ x
;
64 if (ix_cond
& __M81_COND_ZERO
)
65 __imag__ retval
= __imag__ x
;
67 __imag__ retval
= __real__ x
- __real__ x
;
72 #define weak_aliasx(a,b) weak_alias(a,b)
73 weak_aliasx (s(__ccos
), s(ccos
))