blob: 554890afd08061b94b88d22500cc01723665dedd (
plain)
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
|
/* This file is part of the GNU C Library.
Copyright (C) 2013-2019 Free Software Foundation, Inc.
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/>. */
#include <ldsodefs.h>
/* The code checks if _rtld_global_ro was realocated before trying to access
the dl_hwcap field. The assembly is to make the compiler not optimize the
test (&_rtld_global_ro != NULL), which is always true in ISO C (but not
in that case since _rtld_global_ro might not been realocated yet). */
#if defined(SHARED) && !IS_IN (rtld)
# define __GLRO(value) \
({ volatile void **__p = (volatile void**)(&_rtld_global_ro); \
unsigned long int __ret; \
asm ("# x in %0" : "+r" (__p)); \
__ret = (__p) ? GLRO(value) : 0; \
__ret; })
#else
# define __GLRO(value) GLRO(value)
#endif
/* dl_hwcap contains only the latest supported ISA, the macro checks which is
and fills the previous ones. */
#define INIT_ARCH() \
unsigned long int hwcap = __GLRO(dl_hwcap); \
unsigned long int __attribute__((unused)) hwcap2 = __GLRO(dl_hwcap2); \
bool __attribute__((unused)) use_cached_memopt = \
GLRO(dl_powerpc_cpu_features).use_cached_memopt; \
if (hwcap & PPC_FEATURE_ARCH_2_06) \
hwcap |= PPC_FEATURE_ARCH_2_05 | \
PPC_FEATURE_POWER5_PLUS | \
PPC_FEATURE_POWER5 | \
PPC_FEATURE_POWER4; \
else if (hwcap & PPC_FEATURE_ARCH_2_05) \
hwcap |= PPC_FEATURE_POWER5_PLUS | \
PPC_FEATURE_POWER5 | \
PPC_FEATURE_POWER4; \
else if (hwcap & PPC_FEATURE_POWER5_PLUS) \
hwcap |= PPC_FEATURE_POWER5 | \
PPC_FEATURE_POWER4; \
else if (hwcap & PPC_FEATURE_POWER5) \
hwcap |= PPC_FEATURE_POWER4;
|
