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
60
61
62
63
|
/*--------------------------------------------------------------------*/
/*--- Asm-only TransTab stuff. pub_core_transtab_asm.h ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2000-2009 Julian Seward
jseward@acm.org
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
The GNU General Public License is contained in the file COPYING.
*/
#ifndef __PUB_CORE_TRANSTAB_ASM_H
#define __PUB_CORE_TRANSTAB_ASM_H
/* Constants for the fast translation lookup cache. It is a direct
mapped cache, with 2^VG_TT_FAST_BITS entries.
On x86/amd64, the cache index is computed as
'address[VG_TT_FAST_BITS-1 : 0]'.
On ppc32/ppc64, the bottom two bits of instruction addresses are
zero, which means that function causes only 1/4 of the entries to
ever be used. So instead the function is '(address >>u
2)[VG_TT_FAST_BITS-1 : 0]' on those targets. */
#define VG_TT_FAST_BITS 15
#define VG_TT_FAST_SIZE (1 << VG_TT_FAST_BITS)
#define VG_TT_FAST_MASK ((VG_TT_FAST_SIZE) - 1)
/* This macro isn't usable in asm land; nevertheless this seems
like a good place to put it. */
#if defined(VGA_x86) || defined(VGA_amd64)
# define VG_TT_FAST_HASH(_addr) ((((UWord)(_addr)) ) & VG_TT_FAST_MASK)
#elif defined(VGA_ppc32) || defined(VGA_ppc64)
# define VG_TT_FAST_HASH(_addr) ((((UWord)(_addr)) >> 2) & VG_TT_FAST_MASK)
#else
# error "VG_TT_FAST_HASH: unknown platform"
#endif
#endif // __PUB_CORE_TRANSTAB_ASM_H
/*--------------------------------------------------------------------*/
/*--- end ---*/
/*--------------------------------------------------------------------*/
|
