1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
/* Multiply long double (ldbl-128) values, narrowing the result to
float, using soft-fp.
Copyright (C) 2018-2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#define f32mulf64x __hide_f32mulf64x
#define f32mulf128 __hide_f32mulf128
#include <math.h>
#undef f32mulf64x
#undef f32mulf128
#include <math-narrow.h>
#include <soft-fp.h>
#include <single.h>
#include <quad.h>
float
__fmull (_Float128 x, _Float128 y)
{
FP_DECL_EX;
FP_DECL_Q (X);
FP_DECL_Q (Y);
FP_DECL_Q (R);
FP_DECL_S (RN);
float ret;
FP_INIT_ROUNDMODE;
FP_UNPACK_Q (X, x);
FP_UNPACK_Q (Y, y);
FP_MUL_Q (R, X, Y);
#if _FP_W_TYPE_SIZE < 64
FP_TRUNC_COOKED (S, Q, 1, 4, RN, R);
#else
FP_TRUNC_COOKED (S, Q, 1, 2, RN, R);
#endif
FP_PACK_S (ret, RN);
FP_HANDLE_EXCEPTIONS;
CHECK_NARROW_MUL (ret, x, y);
return ret;
}
libm_alias_float_ldouble (mul)
|
GitWeb
