| 1 | /* Divide double values, narrowing the result to float, using soft-fp. |
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| 2 | Copyright (C) 2018-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #define f32divf64 __hide_f32divf64 |
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| 20 | #define f32divf32x __hide_f32divf32x |
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| 21 | #define fdivl __hide_fdivl |
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| 22 | #include <math.h> |
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| 23 | #undef f32divf64 |
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| 24 | #undef f32divf32x |
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| 25 | #undef fdivl |
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| 26 | |
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| 27 | #include <math-narrow.h> |
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| 28 | #include <libc-diag.h> |
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| 29 | |
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| 30 | /* R_f[01] are not set in cases where they are not used in packing, |
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| 31 | but the compiler does not see that they are set in all cases where |
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| 32 | they are used, resulting in warnings that they may be used |
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| 33 | uninitialized. The location of the warning differs in different |
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| 34 | versions of GCC, it may be where R is defined using a macro or it |
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| 35 | may be where the macro is defined. This happens only with -O1. */ |
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| 36 | DIAG_PUSH_NEEDS_COMMENT; |
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| 37 | DIAG_IGNORE_NEEDS_COMMENT (8, "-Wmaybe-uninitialized" ); |
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| 38 | #include <soft-fp.h> |
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| 39 | #include <single.h> |
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| 40 | #include <double.h> |
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| 41 | |
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| 42 | float |
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| 43 | __fdiv (double x, double y) |
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| 44 | { |
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| 45 | FP_DECL_EX; |
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| 46 | FP_DECL_D (X); |
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| 47 | FP_DECL_D (Y); |
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| 48 | FP_DECL_D (R); |
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| 49 | FP_DECL_S (RN); |
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| 50 | float ret; |
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| 51 | |
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| 52 | FP_INIT_ROUNDMODE; |
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| 53 | FP_UNPACK_D (X, x); |
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| 54 | FP_UNPACK_D (Y, y); |
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| 55 | FP_DIV_D (R, X, Y); |
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| 56 | #if _FP_W_TYPE_SIZE < _FP_FRACBITS_D |
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| 57 | FP_TRUNC_COOKED (S, D, 1, 2, RN, R); |
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| 58 | #else |
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| 59 | FP_TRUNC_COOKED (S, D, 1, 1, RN, R); |
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| 60 | #endif |
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| 61 | FP_PACK_S (ret, RN); |
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| 62 | FP_HANDLE_EXCEPTIONS; |
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| 63 | CHECK_NARROW_DIV (ret, x, y); |
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| 64 | return ret; |
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| 65 | } |
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| 66 | DIAG_POP_NEEDS_COMMENT; |
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| 67 | |
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| 68 | libm_alias_float_double (div) |
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| 69 | |
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