diff options
Diffstat (limited to 'kviewshell/plugins/djvu/libdjvu/MMX.h')
| -rw-r--r-- | kviewshell/plugins/djvu/libdjvu/MMX.h | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/kviewshell/plugins/djvu/libdjvu/MMX.h b/kviewshell/plugins/djvu/libdjvu/MMX.h new file mode 100644 index 00000000..41ec002f --- /dev/null +++ b/kviewshell/plugins/djvu/libdjvu/MMX.h @@ -0,0 +1,194 @@ +//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.h,v 1.9 2003/12/01 22:57:40 leonb Exp $ +// $Name: release_3_5_15 $ + +#ifndef _MMX_H_ +#define _MMX_H_ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif +#if NEED_GNUG_PRAGMAS +# pragma interface +#endif + +#include "DjVuGlobal.h" + +#ifdef HAVE_NAMESPACES +namespace DJVU { +# ifdef NOT_DEFINED // Just to fool emacs c++ mode +} +#endif +#endif + + +/** @name MMX.h + Files #"MMX.h"# and #"MMX.cpp"# implement basic routines for + supporting the MMX instructions on x86. Future instruction sets + for other processors may be supported in this file as well. + + Macro #MMX# is defined if the compiler supports the X86-MMX instructions. + It does not mean however that the processor supports the instruction set. + Variable #MMXControl::mmxflag# must be used to decide whether MMX. + instructions can be executed. MMX instructions are entered in the middle + of C++ code using the following macros. Examples can be found in + #"IWTransform.cpp"#. + + \begin{description} + \item[MMXrr( insn, srcreg, dstreg)] + Encode a register to register MMX instruction + (e.g. #paddw# or #punpcklwd#). + \item[MMXar( insn, addr, dstreg )] + Encode a memory to register MMX instruction + (e.g. #moveq# from memory). + \item[MMXra( insn, srcreg, addr )] + Encode a register to memory MMX instruction + (e.g. #moveq# to memory). + \item[MMXir( insn, imm, dstreg )] + Encode a immediate to register MMX instruction + (e.g #psraw#). + \item[MMXemms] + Execute the #EMMS# instruction to reset the FPU state. + \end{description} + + @memo + Essential support for MMX. + @version + #$Id: MMX.h,v 1.9 2003/12/01 22:57:40 leonb Exp $# + @author: + L\'eon Bottou <leonb@research.att.com> -- initial implementation */ +//@{ + + +/** MMX Control. + Class #MMXControl# encapsulates a few static functions for + globally enabling or disabling MMX support. */ + +class MMXControl +{ + public: + // MMX DETECTION + /** Detects and enable MMX or similar technologies. This function checks + whether the CPU supports a vectorial instruction set (such as Intel's + MMX) and enables them. Returns a boolean indicating whether such an + instruction set is available. Speedups factors may vary. */ + static int enable_mmx(); + /** Disables MMX or similar technologies. The transforms will then be + performed using the baseline code. */ + static int disable_mmx(); + /** Contains a value greater than zero if the CPU supports vectorial + instructions. A negative value means that you must call \Ref{enable_mmx} + and test the value again. Direct access to this member should only be + used to transfer the instruction flow to the vectorial branch of the + code. Never modify the value of this variable. Use #enable_mmx# or + #disable_mmx# instead. */ + static int mmxflag; // readonly +}; + +//@} + + + + +// ---------------------------------------- +// GCC MMX MACROS + +#ifndef NO_MMX + +#if defined(__GNUC__) && defined(__i386__) +#define MMXemms \ + __asm__ volatile("emms" : : : "memory" ) +#define MMXrr(op,src,dst) \ + __asm__ volatile( #op " %%" #src ",%%" #dst : : : "memory") +#define MMXir(op,imm,dst) \ + __asm__ volatile( #op " %0,%%" #dst : : "i" (imm) : "memory") +#define MMXar(op,addr,dst) \ + __asm__ volatile( #op " %0,%%" #dst : : "m" (*(int*)(addr)) : "memory") +#define MMXra(op,src,addr) \ + __asm__ volatile( #op " %%" #src ",%0" : : "m" (*(int*)(addr)) : "memory") +#define MMX 1 +#endif + + +// ---------------------------------------- +// MSVC MMX MACROS + +#if defined(_MSC_VER) && defined(_M_IX86) +// Compiler option /GM is required +#pragma warning( disable : 4799 ) +#define MMXemms \ + __asm { emms } +#define MMXrr(op,src,dst) \ + __asm { op dst,src } +#define MMXir(op,imm,dst) \ + __asm { op dst,imm } +#define MMXar(op,addr,dst) \ + { register __int64 var=*(__int64*)(addr); __asm { op dst,var } } +#define MMXra(op,src,addr) \ + { register __int64 var; __asm { op [var],src }; *(__int64*)addr = var; } +// Probably not as efficient as GCC macros +#define MMX 1 +#endif + +#endif + +// ----------- + +#ifdef HAVE_NAMESPACES +} +# ifndef NOT_USING_DJVU_NAMESPACE +using namespace DJVU; +# endif +#endif +#endif |