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/* lzo_func.ch -- functions
This file is part of the LZO real-time data compression library.
Copyright (C) 2011 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2010 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2009 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
All Rights Reserved.
The LZO library 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.
The LZO library 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 the LZO library; see the file COPYING.
If not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Markus F.X.J. Oberhumer
<markus@oberhumer.com>
http://www.oberhumer.com/opensource/lzo/
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the library and is subject
to change.
*/
/***********************************************************************
// bitops
************************************************************************/
#if (defined(_WIN32) || defined(_WIN64)) && ((LZO_CC_INTELC && (__INTEL_COMPILER >= 1000)) || (LZO_CC_MSC && (_MSC_VER >= 1400)))
#include <intrin.h>
#if !defined(lzo_bitops_clz32) && defined(WANT_lzo_bitops_clz32) && 0
#pragma intrinsic(_BitScanReverse)
static __lzo_inline unsigned lzo_bitops_clz32(lzo_uint32 v)
{
unsigned long r;
(void) _BitScanReverse(&r, v);
return (unsigned) r;
}
#define lzo_bitops_clz32 lzo_bitops_clz32
#endif
#if !defined(lzo_bitops_clz64) && defined(WANT_lzo_bitops_clz64) && defined(LZO_UINT64_MAX) && 0
#pragma intrinsic(_BitScanReverse64)
static __lzo_inline unsigned lzo_bitops_clz64(lzo_uint64 v)
{
unsigned long r;
(void) _BitScanReverse64(&r, v);
return (unsigned) r;
}
#define lzo_bitops_clz64 lzo_bitops_clz64
#endif
#if !defined(lzo_bitops_ctz32) && defined(WANT_lzo_bitops_ctz32)
#pragma intrinsic(_BitScanForward)
static __lzo_inline unsigned lzo_bitops_ctz32(lzo_uint32 v)
{
unsigned long r;
(void) _BitScanForward(&r, v);
return (unsigned) r;
}
#define lzo_bitops_ctz32 lzo_bitops_ctz32
#endif
#if !defined(lzo_bitops_ctz64) && defined(WANT_lzo_bitops_ctz64) && defined(LZO_UINT64_MAX)
#pragma intrinsic(_BitScanForward64)
static __lzo_inline unsigned lzo_bitops_ctz64(lzo_uint64 v)
{
unsigned long r;
(void) _BitScanForward64(&r, v);
return (unsigned) r;
}
#define lzo_bitops_ctz64 lzo_bitops_ctz64
#endif
#elif (LZO_CC_CLANG || (LZO_CC_GNUC >= 0x030400ul) || (LZO_CC_INTELC && (__INTEL_COMPILER >= 1000)) || (LZO_CC_LLVM && (!defined(__llvm_tools_version__) || (__llvm_tools_version__+0 >= 0x010500ul))))
#if !defined(lzo_bitops_clz32) && defined(WANT_lzo_bitops_clz32)
#define lzo_bitops_clz32(v) ((unsigned) __builtin_clz(v))
#endif
#if !defined(lzo_bitops_clz64) && defined(WANT_lzo_bitops_clz64) && defined(LZO_UINT64_MAX)
#define lzo_bitops_clz64(v) ((unsigned) __builtin_clzll(v))
#endif
#if !defined(lzo_bitops_ctz32) && defined(WANT_lzo_bitops_ctz32)
#define lzo_bitops_ctz32(v) ((unsigned) __builtin_ctz(v))
#endif
#if !defined(lzo_bitops_ctz64) && defined(WANT_lzo_bitops_ctz64) && defined(LZO_UINT64_MAX)
#define lzo_bitops_ctz64(v) ((unsigned) __builtin_ctzll(v))
#endif
#if !defined(lzo_bitops_popcount32) && defined(WANT_lzo_bitops_popcount32)
#define lzo_bitops_popcount32(v) ((unsigned) __builtin_popcount(v))
#endif
#if !defined(lzo_bitops_popcount32) && defined(WANT_lzo_bitops_popcount64) && defined(LZO_UINT64_MAX)
#define lzo_bitops_popcount64(v) ((unsigned) __builtin_popcountll(v))
#endif
#endif
/*
vi:ts=4:et
*/
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