1 | /* Divide long double (ldbl-128) values, narrowing the result to |
2 | float, using soft-fp. |
3 | Copyright (C) 2018-2022 Free Software Foundation, Inc. |
4 | This file is part of the GNU C Library. |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or |
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. |
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 |
14 | Lesser General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, see |
18 | <https://www.gnu.org/licenses/>. */ |
19 | |
20 | #define f32divf64x __hide_f32divf64x |
21 | #define f32divf128 __hide_f32divf128 |
22 | #include <math.h> |
23 | #undef f32divf64x |
24 | #undef f32divf128 |
25 | |
26 | #include <math-narrow.h> |
27 | #include <libc-diag.h> |
28 | |
29 | /* R_f[01] are not set in cases where they are not used in packing, |
30 | but the compiler does not see that they are set in all cases where |
31 | they are used, resulting in warnings that they may be used |
32 | uninitialized. The location of the warning differs in different |
33 | versions of GCC, it may be where R is defined using a macro or it |
34 | may be where the macro is defined. This happens only with -O1. */ |
35 | DIAG_PUSH_NEEDS_COMMENT; |
36 | DIAG_IGNORE_NEEDS_COMMENT (8, "-Wmaybe-uninitialized" ); |
37 | #include <soft-fp.h> |
38 | #include <single.h> |
39 | #include <quad.h> |
40 | |
41 | float |
42 | __fdivl (_Float128 x, _Float128 y) |
43 | { |
44 | FP_DECL_EX; |
45 | FP_DECL_Q (X); |
46 | FP_DECL_Q (Y); |
47 | FP_DECL_Q (R); |
48 | FP_DECL_S (RN); |
49 | float ret; |
50 | |
51 | FP_INIT_ROUNDMODE; |
52 | FP_UNPACK_Q (X, x); |
53 | FP_UNPACK_Q (Y, y); |
54 | FP_DIV_Q (R, X, Y); |
55 | #if _FP_W_TYPE_SIZE < 64 |
56 | FP_TRUNC_COOKED (S, Q, 1, 4, RN, R); |
57 | #else |
58 | FP_TRUNC_COOKED (S, Q, 1, 2, RN, R); |
59 | #endif |
60 | FP_PACK_S (ret, RN); |
61 | FP_HANDLE_EXCEPTIONS; |
62 | CHECK_NARROW_DIV (ret, x, y); |
63 | return ret; |
64 | } |
65 | DIAG_POP_NEEDS_COMMENT; |
66 | |
67 | libm_alias_float_ldouble (div) |
68 | |