1 | /* Divide double values, narrowing the result to float, using soft-fp. |
2 | Copyright (C) 2018-2024 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 f32divf64 __hide_f32divf64 |
20 | #define f32divf32x __hide_f32divf32x |
21 | #define fdivl __hide_fdivl |
22 | #include <math.h> |
23 | #undef f32divf64 |
24 | #undef f32divf32x |
25 | #undef fdivl |
26 | |
27 | #include <math-narrow.h> |
28 | #include <libc-diag.h> |
29 | |
30 | /* R_f[01] are not set in cases where they are not used in packing, |
31 | but the compiler does not see that they are set in all cases where |
32 | they are used, resulting in warnings that they may be used |
33 | uninitialized. The location of the warning differs in different |
34 | versions of GCC, it may be where R is defined using a macro or it |
35 | may be where the macro is defined. This happens only with -O1. */ |
36 | DIAG_PUSH_NEEDS_COMMENT; |
37 | DIAG_IGNORE_NEEDS_COMMENT (8, "-Wmaybe-uninitialized" ); |
38 | #include <soft-fp.h> |
39 | #include <single.h> |
40 | #include <double.h> |
41 | |
42 | float |
43 | __fdiv (double x, double y) |
44 | { |
45 | FP_DECL_EX; |
46 | FP_DECL_D (X); |
47 | FP_DECL_D (Y); |
48 | FP_DECL_D (R); |
49 | FP_DECL_S (RN); |
50 | float ret; |
51 | |
52 | FP_INIT_ROUNDMODE; |
53 | FP_UNPACK_D (X, x); |
54 | FP_UNPACK_D (Y, y); |
55 | FP_DIV_D (R, X, Y); |
56 | #if _FP_W_TYPE_SIZE < _FP_FRACBITS_D |
57 | FP_TRUNC_COOKED (S, D, 1, 2, RN, R); |
58 | #else |
59 | FP_TRUNC_COOKED (S, D, 1, 1, RN, R); |
60 | #endif |
61 | FP_PACK_S (ret, RN); |
62 | FP_HANDLE_EXCEPTIONS; |
63 | CHECK_NARROW_DIV (ret, x, y); |
64 | return ret; |
65 | } |
66 | DIAG_POP_NEEDS_COMMENT; |
67 | |
68 | libm_alias_float_double (div) |
69 | |