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
56
57
58
59
|
/* Subtract long double (ldbl-128) values, narrowing the result to
double, using soft-fp.
Copyright (C) 2018-2019 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
<http://www.gnu.org/licenses/>. */
#define f32xsubf64x __hide_f32xsubf64x
#define f32xsubf128 __hide_f32xsubf128
#define f64subf64x __hide_f64subf64x
#define f64subf128 __hide_f64subf128
#include <math.h>
#undef f32xsubf64x
#undef f32xsubf128
#undef f64subf64x
#undef f64subf128
#include <math-narrow.h>
#include <soft-fp.h>
#include <double.h>
#include <quad.h>
double
__dsubl (_Float128 x, _Float128 y)
{
FP_DECL_EX;
FP_DECL_Q (X);
FP_DECL_Q (Y);
FP_DECL_Q (R);
FP_DECL_D (RN);
double ret;
FP_INIT_ROUNDMODE;
FP_UNPACK_SEMIRAW_Q (X, x);
FP_UNPACK_SEMIRAW_Q (Y, y);
FP_SUB_Q (R, X, Y);
#if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q
FP_TRUNC (D, Q, 2, 4, RN, R);
#else
FP_TRUNC (D, Q, 1, 2, RN, R);
#endif
FP_PACK_SEMIRAW_D (ret, RN);
FP_HANDLE_EXCEPTIONS;
CHECK_NARROW_SUB (ret, x, y);
return ret;
}
libm_alias_double_ldouble (sub)
|
