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bc6dd76e | 1 | /* Complex exponential function. m68k fpu version |
5da9d124 | 2 | Copyright (C) 1997, 1999 Free Software Foundation, Inc. |
bc6dd76e UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
3214b89b AJ |
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. | |
bc6dd76e UD |
10 | |
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 | |
3214b89b | 14 | Lesser General Public License for more details. |
bc6dd76e | 15 | |
3214b89b AJ |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
bc6dd76e | 20 | |
bc6dd76e UD |
21 | #include <complex.h> |
22 | #include <math.h> | |
5da9d124 | 23 | #include "mathimpl.h" |
bc6dd76e UD |
24 | |
25 | #ifndef SUFF | |
26 | #define SUFF | |
27 | #endif | |
bc6dd76e UD |
28 | #ifndef float_type |
29 | #define float_type double | |
30 | #endif | |
31 | ||
32 | #define CONCATX(a,b) __CONCAT(a,b) | |
33 | #define s(name) CONCATX(name,SUFF) | |
34 | #define m81(func) __m81_u(s(func)) | |
35 | ||
36 | __complex__ float_type | |
37 | s(__cexp) (__complex__ float_type x) | |
38 | { | |
39 | __complex__ float_type retval; | |
e7af313d UD |
40 | unsigned long ix_cond; |
41 | ||
42 | ix_cond = __m81_test (__imag__ x); | |
bc6dd76e | 43 | |
e7af313d | 44 | if ((ix_cond & (__M81_COND_NAN|__M81_COND_INF)) == 0) |
bc6dd76e | 45 | { |
e7af313d UD |
46 | /* Imaginary part is finite. */ |
47 | float_type exp_val = m81(__ieee754_exp) (__real__ x); | |
48 | ||
49 | __real__ retval = __imag__ retval = exp_val; | |
50 | if (m81(__finite) (exp_val)) | |
bc6dd76e | 51 | { |
e7af313d UD |
52 | float_type sin_ix, cos_ix; |
53 | __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix) | |
54 | : "f" (__imag__ x)); | |
55 | __real__ retval *= cos_ix; | |
56 | if (ix_cond & __M81_COND_ZERO) | |
57 | __imag__ retval = __imag__ x; | |
58 | else | |
59 | __imag__ retval *= sin_ix; | |
60 | } | |
61 | else | |
62 | { | |
63 | /* Compute the sign of the result. */ | |
64 | float_type remainder, pi_2; | |
65 | int quadrant; | |
bc6dd76e | 66 | |
e7af313d UD |
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; | |
72 | if (quadrant & 0x80) | |
73 | quadrant ^= 0x83; | |
74 | switch (quadrant) | |
45b0751e | 75 | { |
e7af313d UD |
76 | default: |
77 | break; | |
78 | case 1: | |
79 | __real__ retval = -__real__ retval; | |
80 | break; | |
81 | case 2: | |
82 | __real__ retval = -__real__ retval; | |
83 | case 3: | |
84 | __imag__ retval = -__imag__ retval; | |
85 | break; | |
45b0751e | 86 | } |
e7af313d UD |
87 | if (ix_cond & __M81_COND_ZERO && !m81(__isnan) (exp_val)) |
88 | __imag__ retval = __imag__ x; | |
bc6dd76e | 89 | } |
bc6dd76e | 90 | } |
e7af313d | 91 | else |
bc6dd76e | 92 | { |
e7af313d | 93 | unsigned long rx_cond = __m81_test (__real__ x); |
45b0751e | 94 | |
e7af313d UD |
95 | if (rx_cond & __M81_COND_INF) |
96 | { | |
97 | /* Real part is infinite. */ | |
98 | if (rx_cond & __M81_COND_NEG) | |
45b0751e | 99 | { |
e7af313d UD |
100 | __real__ retval = __imag__ retval = 0.0; |
101 | if (ix_cond & __M81_COND_NEG) | |
102 | __imag__ retval = -__imag__ retval; | |
45b0751e | 103 | } |
bc6dd76e UD |
104 | else |
105 | { | |
e7af313d UD |
106 | __real__ retval = __real__ x; |
107 | __imag__ retval = __imag__ x - __imag__ x; | |
bc6dd76e UD |
108 | } |
109 | } | |
bc6dd76e | 110 | else |
e7af313d | 111 | __real__ retval = __imag__ retval = __imag__ x - __imag__ x; |
bc6dd76e | 112 | } |
bc6dd76e UD |
113 | |
114 | return retval; | |
115 | } | |
116 | #define weak_aliasx(a,b) weak_alias(a,b) | |
117 | weak_aliasx (s(__cexp), s(cexp)) |