1 | /* Divide long double (ldbl-128) values, narrowing the result to |
2 | double, 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 f32xdivf64x __hide_f32xdivf64x |
21 | #define f32xdivf128 __hide_f32xdivf128 |
22 | #define f64divf64x __hide_f64divf64x |
23 | #define f64divf128 __hide_f64divf128 |
24 | #include <math.h> |
25 | #undef f32xdivf64x |
26 | #undef f32xdivf128 |
27 | #undef f64divf64x |
28 | #undef f64divf128 |
29 | |
30 | #include <math-narrow.h> |
31 | #include <libc-diag.h> |
32 | |
33 | /* R_f[01] are not set in cases where they are not used in packing, |
34 | but the compiler does not see that they are set in all cases where |
35 | they are used, resulting in warnings that they may be used |
36 | uninitialized. The location of the warning differs in different |
37 | versions of GCC, it may be where R is defined using a macro or it |
38 | may be where the macro is defined. This happens only with -O1. */ |
39 | DIAG_PUSH_NEEDS_COMMENT; |
40 | DIAG_IGNORE_NEEDS_COMMENT (8, "-Wmaybe-uninitialized" ); |
41 | #include <soft-fp.h> |
42 | #include <double.h> |
43 | #include <quad.h> |
44 | |
45 | double |
46 | __ddivl (_Float128 x, _Float128 y) |
47 | { |
48 | FP_DECL_EX; |
49 | FP_DECL_Q (X); |
50 | FP_DECL_Q (Y); |
51 | FP_DECL_Q (R); |
52 | FP_DECL_D (RN); |
53 | double ret; |
54 | |
55 | FP_INIT_ROUNDMODE; |
56 | FP_UNPACK_Q (X, x); |
57 | FP_UNPACK_Q (Y, y); |
58 | FP_DIV_Q (R, X, Y); |
59 | #if _FP_W_TYPE_SIZE < 64 |
60 | FP_TRUNC_COOKED (D, Q, 2, 4, RN, R); |
61 | #else |
62 | FP_TRUNC_COOKED (D, Q, 1, 2, RN, R); |
63 | #endif |
64 | FP_PACK_D (ret, RN); |
65 | FP_HANDLE_EXCEPTIONS; |
66 | CHECK_NARROW_DIV (ret, x, y); |
67 | return ret; |
68 | } |
69 | DIAG_POP_NEEDS_COMMENT; |
70 | |
71 | libm_alias_double_ldouble (div) |
72 | |