1 /* Complex exponential function. m68k fpu version
2 Copyright (C) 1997 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. */
28 #define float_type double
31 #define CONCATX(a,b) __CONCAT(a,b)
32 #define s(name) CONCATX(name,SUFF)
33 #define m81(func) __m81_u(s(func))
35 __complex__ float_type
36 s(__cexp) (__complex__ float_type x)
38 __complex__ float_type retval;
39 unsigned long ix_cond;
41 ix_cond = __m81_test (__imag__ x);
43 if ((ix_cond & (__M81_COND_NAN|__M81_COND_INF)) == 0)
45 /* Imaginary part is finite. */
46 float_type exp_val = m81(__ieee754_exp) (__real__ x);
48 __real__ retval = __imag__ retval = exp_val;
49 if (m81(__finite) (exp_val))
51 float_type sin_ix, cos_ix;
52 __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix)
54 __real__ retval *= cos_ix;
55 if (ix_cond & __M81_COND_ZERO)
56 __imag__ retval = __imag__ x;
58 __imag__ retval *= sin_ix;
62 /* Compute the sign of the result. */
63 float_type remainder, pi_2;
66 __asm ("fmovecr %#0,%0\n\tfscale%.w %#-1,%0" : "=f" (pi_2));
67 __asm ("fmod%.x %2,%0\n\tfmove%.l %/fpsr,%1"
68 : "=f" (remainder), "=dm" (quadrant)
69 : "f" (pi_2), "0" (__imag__ x));
70 quadrant = (quadrant >> 16) & 0x83;
78 __real__ retval = -__real__ retval;
81 __real__ retval = -__real__ retval;
83 __imag__ retval = -__imag__ retval;
86 if (ix_cond & __M81_COND_ZERO && !m81(__isnan) (exp_val))
87 __imag__ retval = __imag__ x;
92 unsigned long rx_cond = __m81_test (__real__ x);
94 if (rx_cond & __M81_COND_INF)
96 /* Real part is infinite. */
97 if (rx_cond & __M81_COND_NEG)
99 __real__ retval = __imag__ retval = 0.0;
100 if (ix_cond & __M81_COND_NEG)
101 __imag__ retval = -__imag__ retval;
105 __real__ retval = __real__ x;
106 __imag__ retval = __imag__ x - __imag__ x;
110 __real__ retval = __imag__ retval = __imag__ x - __imag__ x;
115 #define weak_aliasx(a,b) weak_alias(a,b)
116 weak_aliasx (s(__cexp), s(cexp))