blob: 05f51217bfcc012266fbce48fa03bfb9f122d9a3 (
plain) (
blame)
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
|
/* Manipulation of the bit representation of 'long double' quantities.
Copyright (C) 2006-2017 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/>. */
#ifndef _MATH_LDBL_H_PPC_
#define _MATH_LDBL_H_PPC_ 1
/* GCC does not optimize the default ldbl_pack code to not spill register
in the stack. The following optimization tells gcc that pack/unpack
is really a nop. We use fr1/fr2 because those are the regs used to
pass/return a single long double arg. */
static inline long double
ldbl_pack_ppc (double a, double aa)
{
register long double x __asm__ ("fr1");
register double xh __asm__ ("fr1");
register double xl __asm__ ("fr2");
xh = a;
xl = aa;
__asm__ ("" : "=f" (x) : "f" (xh), "f" (xl));
return x;
}
static inline void
ldbl_unpack_ppc (long double l, double *a, double *aa)
{
register long double x __asm__ ("fr1");
register double xh __asm__ ("fr1");
register double xl __asm__ ("fr2");
x = l;
__asm__ ("" : "=f" (xh), "=f" (xl) : "f" (x));
*a = xh;
*aa = xl;
}
#define ldbl_pack ldbl_pack_ppc
#define ldbl_unpack ldbl_unpack_ppc
#include <sysdeps/ieee754/ldbl-128ibm/math_ldbl.h>
#endif /* math_ldbl.h */
|
