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sar.h
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sar.h
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/*******************************************************************************
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
(c) Copyright 1996 - 2003 Gary Henderson (gary.henderson@ntlworld.com) and
Jerremy Koot (jkoot@snes9x.com)
(c) Copyright 2002 - 2003 Matthew Kendora and
Brad Jorsch (anomie@users.sourceforge.net)
C4 x86 assembler and some C emulation code
(c) Copyright 2000 - 2003 zsKnight (zsknight@zsnes.com),
_Demo_ (_demo_@zsnes.com), and
Nach (n-a-c-h@users.sourceforge.net)
C4 C++ code
(c) Copyright 2003 Brad Jorsch
DSP-1 emulator code
(c) Copyright 1998 - 2003 Ivar (ivar@snes9x.com), _Demo_, Gary Henderson,
John Weidman (jweidman@slip.net),
neviksti (neviksti@hotmail.com), and
Kris Bleakley (stinkfish@bigpond.com)
DSP-2 emulator code
(c) Copyright 2003 Kris Bleakley, John Weidman, neviksti, Matthew Kendora, and
Lord Nightmare (lord_nightmare@users.sourceforge.net
OBC1 emulator code
(c) Copyright 2001 - 2003 zsKnight, pagefault (pagefault@zsnes.com)
Ported from x86 assembler to C by sanmaiwashi
SPC7110 and RTC C++ emulator code
(c) Copyright 2002 Matthew Kendora with research by
zsKnight, John Weidman, and Dark Force
S-RTC C emulator code
(c) Copyright 2001 John Weidman
Super FX x86 assembler emulator code
(c) Copyright 1998 - 2003 zsKnight, _Demo_, and pagefault
Super FX C emulator code
(c) Copyright 1997 - 1999 Ivar and Gary Henderson.
Specific ports contains the works of other authors. See headers in
individual files.
Snes9x homepage: http://www.snes9x.com
Permission to use, copy, modify and distribute Snes9x in both binary and
source form, for non-commercial purposes, is hereby granted without fee,
providing that this license information and copyright notice appear with
all copies and any derived work.
This software is provided 'as-is', without any express or implied
warranty. In no event shall the authors be held liable for any damages
arising from the use of this software.
Snes9x is freeware for PERSONAL USE only. Commercial users should
seek permission of the copyright holders first. Commercial use includes
charging money for Snes9x or software derived from Snes9x.
The copyright holders request that bug fixes and improvements to the code
should be forwarded to them so everyone can benefit from the modifications
in future versions.
Super NES and Super Nintendo Entertainment System are trademarks of
Nintendo Co., Limited and its subsidiary companies.
*******************************************************************************/
#ifndef _SAR_H_
#define _SAR_H_
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "port.h"
#ifndef snes9x_types_defined
#include "9xtypes.h"
#endif
#ifdef RIGHTSHIFT_IS_SAR
#define SAR(b, n) ((b)>>(n))
#else
static inline int8 SAR(const int8 b, const int n){
#ifndef RIGHTSHIFT_INT8_IS_SAR
if(b<0) return (b>>n)|(-1<<(8-n));
#endif
return b>>n;
}
static inline int16 SAR(const int16 b, const int n){
#ifndef RIGHTSHIFT_INT16_IS_SAR
if(b<0) return (b>>n)|(-1<<(16-n));
#endif
return b>>n;
}
static inline int32 SAR(const int32 b, const int n){
#ifndef RIGHTSHIFT_INT32_IS_SAR
if(b<0) return (b>>n)|(-1<<(32-n));
#endif
return b>>n;
}
static inline int64 SAR(const int64 b, const int n){
#ifndef RIGHTSHIFT_INT64_IS_SAR
if(b<0) return (b>>n)|(-1<<(64-n));
#endif
return b>>n;
}
#endif
#endif