1 /* Divide 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 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
__fdiv(double x,double y)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