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1 | /* Fused multiply-add of double value, narrowing the result to float. |
2 | x86 version. | |
6d7e8eda | 3 | Copyright (C) 2021-2023 Free Software Foundation, Inc. |
4ed7a383 JM |
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 f32fmaf64 __hide_f32fmaf64 | |
21 | #define f32fmaf32x __hide_f32fmaf32x | |
22 | #define ffmal __hide_ffmal | |
23 | #include <math.h> | |
24 | #undef f32fmaf64 | |
25 | #undef f32fmaf32x | |
26 | #undef ffmal | |
27 | ||
28 | #include <math-narrow.h> | |
29 | ||
b26901b2 | 30 | #ifndef __FP_FAST_FMA |
4ed7a383 JM |
31 | /* Depending on the details of the glibc configuration, fma might use |
32 | either SSE or 387 arithmetic; ensure that both parts of the | |
b26901b2 JM |
33 | floating-point state are handled in the round-to-odd code. If |
34 | __FP_FAST_FMA is defined, that implies that the compiler is using | |
35 | SSE floating point and that the fma call will be inlined, so the | |
36 | x86 macros will work with only the SSE state and that is | |
37 | sufficient. */ | |
4ed7a383 JM |
38 | # undef libc_feholdexcept_setround |
39 | # define libc_feholdexcept_setround default_libc_feholdexcept_setround | |
40 | # undef libc_feupdateenv_test | |
41 | # define libc_feupdateenv_test default_libc_feupdateenv_test | |
42 | #endif | |
43 | ||
44 | float | |
45 | __ffma (double x, double y, double z) | |
46 | { | |
47 | NARROW_FMA_ROUND_TO_ODD (x, y, z, float, union ieee754_double, , mantissa1, | |
48 | false); | |
49 | } | |
50 | libm_alias_float_double (fma) |