| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Implement fmal using soft-fp. |
| 2 | Copyright (C) 2013-2015 Free Software Foundation, Inc. |
| 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 | |
| 28 | #include <libc-internal.h> |
| 29 | #include <math.h> |
| 30 | #include "soft-fp.h" |
| 31 | #include "quad.h" |
| 32 | |
| 33 | long double |
| 34 | __fmal (long double a, long double b, long double c) |
| 35 | { |
| 36 | FP_DECL_EX; |
| 37 | FP_DECL_Q (A); |
| 38 | FP_DECL_Q (B); |
| 39 | FP_DECL_Q (C); |
| 40 | FP_DECL_Q (R); |
| 41 | long double r; |
| 42 | |
| 43 | FP_INIT_ROUNDMODE; |
| 44 | FP_UNPACK_Q (A, a); |
| 45 | FP_UNPACK_Q (B, b); |
| 46 | FP_UNPACK_Q (C, c); |
| 47 | FP_FMA_Q (R, A, B, C); |
| 48 | /* R_e is not set in cases where it is not used in packing, but the |
| 49 | compiler does not see that it is set in all cases where it is |
| 50 | used, resulting in warnings that it may be used |
| 51 | uninitialized. */ |
| 52 | DIAG_PUSH_NEEDS_COMMENT; |
| 53 | #if __GNUC_PREREQ (4, 7) |
| 54 | DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wmaybe-uninitialized"); |
| 55 | #else |
| 56 | DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wuninitialized"); |
| 57 | #endif |
| 58 | FP_PACK_Q (r, R); |
| 59 | DIAG_POP_NEEDS_COMMENT; |
| 60 | FP_HANDLE_EXCEPTIONS; |
| 61 | |
| 62 | return r; |
| 63 | } |
| 64 | weak_alias (__fmal, fmal) |