1 | /* Multiply double values, narrowing the result to float, using soft-fp. |
2 | Copyright (C) 2018-2022 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 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #define f32mulf64 __hide_f32mulf64 |
20 | #define f32mulf32x __hide_f32mulf32x |
21 | #define fmull __hide_fmull |
22 | #include <math.h> |
23 | #undef f32mulf64 |
24 | #undef f32mulf32x |
25 | #undef fmull |
26 | |
27 | #include <math-narrow.h> |
28 | #include <soft-fp.h> |
29 | #include <single.h> |
30 | #include <double.h> |
31 | |
32 | float |
33 | __fmul (double x, double y) |
34 | { |
35 | FP_DECL_EX; |
36 | FP_DECL_D (X); |
37 | FP_DECL_D (Y); |
38 | FP_DECL_D (R); |
39 | FP_DECL_S (RN); |
40 | float ret; |
41 | |
42 | FP_INIT_ROUNDMODE; |
43 | FP_UNPACK_D (X, x); |
44 | FP_UNPACK_D (Y, y); |
45 | FP_MUL_D (R, X, Y); |
46 | #if _FP_W_TYPE_SIZE < _FP_FRACBITS_D |
47 | FP_TRUNC_COOKED (S, D, 1, 2, RN, R); |
48 | #else |
49 | FP_TRUNC_COOKED (S, D, 1, 1, RN, R); |
50 | #endif |
51 | FP_PACK_S (ret, RN); |
52 | FP_HANDLE_EXCEPTIONS; |
53 | CHECK_NARROW_MUL (ret, x, y); |
54 | return ret; |
55 | } |
56 | libm_alias_float_double (mul) |
57 | |