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29b12174 | 1 | /* Complex sine function. m68k fpu version |
04277e02 | 2 | Copyright (C) 1997-2019 Free Software Foundation, Inc. |
29b12174 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. | |
29b12174 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. |
29b12174 | 15 | |
3214b89b | 16 | You should have received a copy of the GNU Lesser General Public |
ab84e3ff | 17 | License along with the GNU C Library. If not, see |
5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
29b12174 | 19 | |
29b12174 UD |
20 | #include <complex.h> |
21 | #include <math.h> | |
5da9d124 | 22 | #include "mathimpl.h" |
29b12174 | 23 | |
c50eee19 | 24 | #define s(name) M_SUF (name) |
29b12174 UD |
25 | #define m81(func) __m81_u(s(func)) |
26 | ||
c50eee19 PM |
27 | CFLOAT |
28 | s(__csin) (CFLOAT x) | |
29b12174 | 29 | { |
c50eee19 | 30 | CFLOAT retval; |
29b12174 UD |
31 | unsigned long rx_cond = __m81_test (__real__ x); |
32 | ||
33 | if ((rx_cond & (__M81_COND_INF|__M81_COND_NAN)) == 0) | |
34 | { | |
35 | /* Real part is finite. */ | |
c50eee19 | 36 | FLOAT sin_rx, cos_rx; |
29b12174 UD |
37 | |
38 | __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_rx), "=f" (cos_rx) | |
39 | : "f" (__real__ x)); | |
40 | if (rx_cond & __M81_COND_ZERO) | |
41 | __real__ retval = __real__ x; | |
42 | else | |
43 | __real__ retval = sin_rx * m81(__ieee754_cosh) (__imag__ x); | |
44 | __imag__ retval = cos_rx * m81(__ieee754_sinh) (__imag__ x); | |
45 | } | |
46 | else | |
47 | { | |
48 | unsigned long ix_cond = __m81_test (__imag__ x); | |
49 | ||
50 | __real__ retval = __real__ x - __real__ x; | |
51 | if (ix_cond & (__M81_COND_ZERO|__M81_COND_INF|__M81_COND_NAN)) | |
52 | __imag__ retval = __imag__ x; | |
53 | else | |
54 | __imag__ retval = __real__ retval; | |
55 | } | |
56 | ||
57 | return retval; | |
58 | } | |
faec6323 | 59 | declare_mgen_alias (__csin, csin) |