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Diffstat (limited to 'kviewshell/plugins/djvu/libdjvu/MMX.cpp')
| -rw-r--r-- | kviewshell/plugins/djvu/libdjvu/MMX.cpp | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/kviewshell/plugins/djvu/libdjvu/MMX.cpp b/kviewshell/plugins/djvu/libdjvu/MMX.cpp new file mode 100644 index 00000000..58b74177 --- /dev/null +++ b/kviewshell/plugins/djvu/libdjvu/MMX.cpp @@ -0,0 +1,209 @@ +//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 |