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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
//C- -*- C++ -*-
//C- -------------------------------------------------------------------
//C- DjVuLibre-3.5
//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
//C- Copyright (c) 2001 AT&T
//C-
//C- This software is subject to, and may be distributed under, the
//C- GNU General Public License, Version 2. The license should have
//C- accompanied the software or you may obtain a copy of the license
//C- from the Free Software Foundation at http://www.fsf.org .
//C-
//C- This program is distributed in the hope that it will be useful,
//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//C- GNU General Public License for more details.
//C-
//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
//C- Software authorized us to replace the original DjVu(r) Reference
//C- Library notice by the following text (see doc/lizard2002.djvu):
//C-
//C- ------------------------------------------------------------------
//C- | DjVu (r) Reference Library (v. 3.5)
//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
//C- | The DjVu Reference Library is protected by U.S. Pat. No.
//C- | 6,058,214 and patents pending.
//C- |
//C- | This software is subject to, and may be distributed under, the
//C- | GNU General Public License, Version 2. The license should have
//C- | accompanied the software or you may obtain a copy of the license
//C- | from the Free Software Foundation at http://www.fsf.org .
//C- |
//C- | The computer code originally released by LizardTech under this
//C- | license and unmodified by other parties is deemed "the LIZARDTECH
//C- | ORIGINAL CODE." Subject to any third party intellectual property
//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
//C- | non-exclusive license to make, use, sell, or otherwise dispose of
//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
//C- | General Public License. This grant only confers the right to
//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
//C- | the extent such infringement is reasonably necessary to enable
//C- | recipient to make, have made, practice, sell, or otherwise dispose
//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
//C- | any greater extent that may be necessary to utilize further
//C- | modifications or combinations.
//C- |
//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
//C- +------------------------------------------------------------------
//
// $Id: MMX.cpp,v 1.10 2004/05/13 16:50:10 leonb Exp $
// $Name: release_3_5_15 $
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma implementation
#endif
#include "MMX.h"
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_NAMESPACES
namespace DJVU {
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
}
#endif
#endif
// ----------------------------------------
// PRINTING MMX REGISTERS (Debug)
#if defined(MMX) && defined(DEBUG)
extern "C" void
mmx_show()
{
/* This function can be called from a debugger
in order to visualize the contents of the MMX registers. */
int mmregs[16];
MMXra( movq, mm0, &mmregs[0]);
MMXra( movq, mm1, &mmregs[2]);
MMXra( movq, mm2, &mmregs[4]);
MMXra( movq, mm3, &mmregs[6]);
MMXra( movq, mm4, &mmregs[8]);
MMXra( movq, mm5, &mmregs[10]);
MMXra( movq, mm6, &mmregs[12]);
MMXra( movq, mm7, &mmregs[14]);
MMXemms;
for (int i=0; i<8; i++)
DjVuPrintMessageUTF8("mm%d: %08x%08x\n", i,
mmregs[i+i+1], mmregs[i+i]);
MMXar( movq, &mmregs[0], mm0);
MMXar( movq, &mmregs[2], mm1);
MMXar( movq, &mmregs[4], mm2);
MMXar( movq, &mmregs[6], mm3);
MMXar( movq, &mmregs[8], mm4);
MMXar( movq, &mmregs[10], mm5);
MMXar( movq, &mmregs[12], mm6);
MMXar( movq, &mmregs[14], mm7);
}
#endif
// ----------------------------------------
// MMX ENABLE/DISABLE
// Default settings autodetect MMX.
// Use macro DISABLE_MMX to disable MMX by default.
#if defined(MMX) && !defined(DISABLE_MMX)
int MMXControl::mmxflag = -1;
#else
int MMXControl::mmxflag = 0;
#endif
int
MMXControl::disable_mmx()
{
mmxflag = 0;
return mmxflag;
}
int
MMXControl::enable_mmx()
{
int cpuflags = 0;
#if defined(MMX) && defined(__GNUC__) && defined(__i386__)
// Detection of MMX for GCC
__asm__ volatile ("pushl %%ebx\n\t"
"pushfl\n\t"
"popl %%ecx\n\t"
"xorl %%edx,%%edx\n\t"
// Check that CPUID exists
"movl %%ecx,%%eax\n\t"
"xorl $0x200000,%%eax\n\t"
"pushl %%eax\n\t"
"popfl\n\t"
"pushfl\n\t"
"popl %%eax\n\t"
"xorl %%ecx,%%eax\n\t"
"jz 1f\n\t"
"pushl %%ecx\n\t"
"popfl\n\t"
// Check that CR0:EM is clear
"smsw %%ax\n\t"
"andl $4,%%eax\n\t"
"jnz 1f\n\t"
// Execute CPUID
"movl $1,%%eax\n\t"
"cpuid\n"
// EBX contains magic when -fPIC is on.
"1:\tpopl %%ebx\n\t"
"movl %%edx, %0"
: "=m" (cpuflags) :
: "eax","ecx","edx");
#endif
#if defined(MMX) && defined(_MSC_VER) && defined(_M_IX86)
// Detection of MMX for MSVC
__asm { pushfd
pop ecx
xor edx,edx
;// Check that CPUID exists
mov eax,ecx
xor eax,0x200000
push eax
popfd
pushfd
pop eax
xor eax,ecx
jz fini
push ecx
popfd
;// Check that CR0:EM is zero
smsw ax
and eax,4
jnz fini
;// Execute CPUID
mov eax,1
_emit 0xf
_emit 0xa2
fini:
mov cpuflags,edx
;// MSVC determines clobbered registers by scanning the assembly code.
;// Since it does not know CPUID, it would not know that EBX is clobbered
;// without the dummy instruction below...
xor ebx,ebx
}
#endif
mmxflag = !!(cpuflags & 0x800000);
return mmxflag;
}
#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif
|
