snes9x/sar.h

53 lines
1.1 KiB
C
Raw Permalink Normal View History

/*****************************************************************************\
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
This file is licensed under the Snes9x License.
For further information, consult the LICENSE file in the root directory.
\*****************************************************************************/
2010-09-25 15:46:12 +00:00
#ifndef _SAR_H_
#define _SAR_H_
#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