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77f01ab5 | 1 | /* Implement fmal using soft-fp. |
bfff8b1b | 2 | Copyright (C) 2013-2017 Free Software Foundation, Inc. |
77f01ab5 JM |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | In addition to the permissions in the GNU Lesser General Public | |
11 | License, the Free Software Foundation gives you unlimited | |
12 | permission to link the compiled version of this file into | |
13 | combinations with other programs, and to distribute those | |
14 | combinations without any restriction coming from the use of this | |
15 | file. (The Lesser General Public License restrictions do apply in | |
16 | other respects; for example, they cover modification of the file, | |
17 | and distribution when not linked into a combine executable.) | |
18 | ||
19 | The GNU C Library is distributed in the hope that it will be useful, | |
20 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
22 | Lesser General Public License for more details. | |
23 | ||
24 | You should have received a copy of the GNU Lesser General Public | |
25 | License along with the GNU C Library; if not, see | |
26 | <http://www.gnu.org/licenses/>. */ | |
27 | ||
9090848d ZW |
28 | #include <math.h> |
29 | #include <libc-diag.h> | |
541f19ba | 30 | #include <libm-alias-ldouble.h> |
9090848d | 31 | |
37430363 SE |
32 | /* R_e is not set in cases where it is not used in packing, but the |
33 | compiler does not see that it is set in all cases where it is | |
34 | used, resulting in warnings that it may be used uninitialized. | |
35 | The location of the warning differs in different versions of GCC, | |
36 | it may be where R is defined using a macro or it may be where the | |
37 | macro is defined. */ | |
38 | DIAG_PUSH_NEEDS_COMMENT; | |
37430363 | 39 | DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wmaybe-uninitialized"); |
9090848d | 40 | |
77f01ab5 JM |
41 | #include "soft-fp.h" |
42 | #include "quad.h" | |
43 | ||
44 | long double | |
45 | __fmal (long double a, long double b, long double c) | |
46 | { | |
47 | FP_DECL_EX; | |
51ca9e29 JM |
48 | FP_DECL_Q (A); |
49 | FP_DECL_Q (B); | |
50 | FP_DECL_Q (C); | |
51 | FP_DECL_Q (R); | |
77f01ab5 JM |
52 | long double r; |
53 | ||
54 | FP_INIT_ROUNDMODE; | |
51ca9e29 JM |
55 | FP_UNPACK_Q (A, a); |
56 | FP_UNPACK_Q (B, b); | |
57 | FP_UNPACK_Q (C, c); | |
58 | FP_FMA_Q (R, A, B, C); | |
59 | FP_PACK_Q (r, R); | |
77f01ab5 JM |
60 | FP_HANDLE_EXCEPTIONS; |
61 | ||
62 | return r; | |
63 | } | |
37430363 SE |
64 | DIAG_POP_NEEDS_COMMENT; |
65 | ||
541f19ba | 66 | libm_alias_ldouble (__fma, fma) |