pjs/media/libtheora/lib/mathops.h

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5.4 KiB
C
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Bug 507554 - Update in-tree libtheora to 1.1.0 (Thusnelda) plus post-release fixes from SVN. r=chris.double, rs=roc --HG-- rename : media/libtheora/lib/dec/apiwrapper.c => media/libtheora/lib/apiwrapper.c rename : media/libtheora/lib/dec/apiwrapper.h => media/libtheora/lib/apiwrapper.h rename : media/libtheora/lib/dec/bitpack.c => media/libtheora/lib/bitpack.c rename : media/libtheora/lib/dec/bitpack.h => media/libtheora/lib/bitpack.h rename : media/libtheora/lib/dec/dct.h => media/libtheora/lib/dct.h rename : media/libtheora/lib/dec/decapiwrapper.c => media/libtheora/lib/decapiwrapper.c rename : media/libtheora/lib/dec/decinfo.c => media/libtheora/lib/decinfo.c rename : media/libtheora/lib/dec/decint.h => media/libtheora/lib/decint.h rename : media/libtheora/lib/dec/decode.c => media/libtheora/lib/decode.c rename : media/libtheora/lib/dec/dequant.c => media/libtheora/lib/dequant.c rename : media/libtheora/lib/dec/dequant.h => media/libtheora/lib/dequant.h rename : media/libtheora/lib/dec/fragment.c => media/libtheora/lib/fragment.c rename : media/libtheora/lib/dec/huffdec.c => media/libtheora/lib/huffdec.c rename : media/libtheora/lib/dec/huffdec.h => media/libtheora/lib/huffdec.h rename : media/libtheora/lib/dec/huffman.h => media/libtheora/lib/huffman.h rename : media/libtheora/lib/dec/idct.c => media/libtheora/lib/idct.c rename : media/libtheora/lib/dec/info.c => media/libtheora/lib/info.c rename : media/libtheora/lib/dec/internal.c => media/libtheora/lib/internal.c rename : media/libtheora/lib/dec/ocintrin.h => media/libtheora/lib/ocintrin.h rename : media/libtheora/lib/dec/quant.c => media/libtheora/lib/quant.c rename : media/libtheora/lib/dec/quant.h => media/libtheora/lib/quant.h rename : media/libtheora/lib/dec/state.c => media/libtheora/lib/state.c rename : media/libtheora/lib/dec/x86/mmxfrag.c => media/libtheora/lib/x86/mmxfrag.c rename : media/libtheora/lib/dec/x86/mmxidct.c => media/libtheora/lib/x86/mmxidct.c rename : media/libtheora/lib/dec/x86/mmxstate.c => media/libtheora/lib/x86/mmxstate.c rename : media/libtheora/lib/dec/x86/x86int.h => media/libtheora/lib/x86/x86int.h rename : media/libtheora/lib/dec/x86/x86state.c => media/libtheora/lib/x86/x86state.c rename : media/libtheora/lib/dec/x86_vc/mmxfrag.c => media/libtheora/lib/x86_vc/mmxfrag.c rename : media/libtheora/lib/dec/x86_vc/mmxidct.c => media/libtheora/lib/x86_vc/mmxidct.c rename : media/libtheora/lib/dec/x86_vc/mmxstate.c => media/libtheora/lib/x86_vc/mmxstate.c rename : media/libtheora/lib/dec/x86_vc/x86int.h => media/libtheora/lib/x86_vc/x86int.h rename : media/libtheora/lib/dec/x86_vc/x86state.c => media/libtheora/lib/x86_vc/x86state.c
2009-09-28 02:14:21 +04:00
#if !defined(_mathops_H)
# define _mathops_H (1)
# include <ogg/ogg.h>
# ifdef __GNUC_PREREQ
# if __GNUC_PREREQ(3,4)
# include <limits.h>
/*Note the casts to (int) below: this prevents OC_CLZ{32|64}_OFFS from
"upgrading" the type of an entire expression to an (unsigned) size_t.*/
# if INT_MAX>=2147483647
# define OC_CLZ32_OFFS ((int)sizeof(unsigned)*CHAR_BIT)
# define OC_CLZ32(_x) (__builtin_clz(_x))
# elif LONG_MAX>=2147483647L
# define OC_CLZ32_OFFS ((int)sizeof(unsigned long)*CHAR_BIT)
# define OC_CLZ32(_x) (__builtin_clzl(_x))
# endif
# if INT_MAX>=9223372036854775807LL
# define OC_CLZ64_OFFS ((int)sizeof(unsigned)*CHAR_BIT)
# define OC_CLZ64(_x) (__builtin_clz(_x))
# elif LONG_MAX>=9223372036854775807LL
# define OC_CLZ64_OFFS ((int)sizeof(unsigned long)*CHAR_BIT)
# define OC_CLZ64(_x) (__builtin_clzl(_x))
# elif LLONG_MAX>=9223372036854775807LL|| \
__LONG_LONG_MAX__>=9223372036854775807LL
# define OC_CLZ64_OFFS ((int)sizeof(unsigned long long)*CHAR_BIT)
# define OC_CLZ64(_x) (__builtin_clzll(_x))
# endif
# endif
# endif
/**
* oc_ilog32 - Integer binary logarithm of a 32-bit value.
* @_v: A 32-bit value.
* Returns floor(log2(_v))+1, or 0 if _v==0.
* This is the number of bits that would be required to represent _v in two's
* complement notation with all of the leading zeros stripped.
* The OC_ILOG_32() or OC_ILOGNZ_32() macros may be able to use a builtin
* function instead, which should be faster.
*/
int oc_ilog32(ogg_uint32_t _v);
/**
* oc_ilog64 - Integer binary logarithm of a 64-bit value.
* @_v: A 64-bit value.
* Returns floor(log2(_v))+1, or 0 if _v==0.
* This is the number of bits that would be required to represent _v in two's
* complement notation with all of the leading zeros stripped.
* The OC_ILOG_64() or OC_ILOGNZ_64() macros may be able to use a builtin
* function instead, which should be faster.
*/
int oc_ilog64(ogg_int64_t _v);
# if defined(OC_CLZ32)
/**
* OC_ILOGNZ_32 - Integer binary logarithm of a non-zero 32-bit value.
* @_v: A non-zero 32-bit value.
* Returns floor(log2(_v))+1.
* This is the number of bits that would be required to represent _v in two's
* complement notation with all of the leading zeros stripped.
* If _v is zero, the return value is undefined; use OC_ILOG_32() instead.
*/
# define OC_ILOGNZ_32(_v) (OC_CLZ32_OFFS-OC_CLZ32(_v))
/**
* OC_ILOG_32 - Integer binary logarithm of a 32-bit value.
* @_v: A 32-bit value.
* Returns floor(log2(_v))+1, or 0 if _v==0.
* This is the number of bits that would be required to represent _v in two's
* complement notation with all of the leading zeros stripped.
*/
# define OC_ILOG_32(_v) (OC_ILOGNZ_32(_v)&-!!(_v))
# else
# define OC_ILOGNZ_32(_v) (oc_ilog32(_v))
# define OC_ILOG_32(_v) (oc_ilog32(_v))
# endif
# if defined(CLZ64)
/**
* OC_ILOGNZ_64 - Integer binary logarithm of a non-zero 64-bit value.
* @_v: A non-zero 64-bit value.
* Returns floor(log2(_v))+1.
* This is the number of bits that would be required to represent _v in two's
* complement notation with all of the leading zeros stripped.
* If _v is zero, the return value is undefined; use OC_ILOG_64() instead.
*/
# define OC_ILOGNZ_64(_v) (CLZ64_OFFS-CLZ64(_v))
/**
* OC_ILOG_64 - Integer binary logarithm of a 64-bit value.
* @_v: A 64-bit value.
* Returns floor(log2(_v))+1, or 0 if _v==0.
* This is the number of bits that would be required to represent _v in two's
* complement notation with all of the leading zeros stripped.
*/
# define OC_ILOG_64(_v) (OC_ILOGNZ_64(_v)&-!!(_v))
# else
# define OC_ILOGNZ_64(_v) (oc_ilog64(_v))
# define OC_ILOG_64(_v) (oc_ilog64(_v))
# endif
# define OC_STATIC_ILOG0(_v) (!!(_v))
# define OC_STATIC_ILOG1(_v) (((_v)&0x2)?2:OC_STATIC_ILOG0(_v))
# define OC_STATIC_ILOG2(_v) \
(((_v)&0xC)?2+OC_STATIC_ILOG1((_v)>>2):OC_STATIC_ILOG1(_v))
# define OC_STATIC_ILOG3(_v) \
(((_v)&0xF0)?4+OC_STATIC_ILOG2((_v)>>4):OC_STATIC_ILOG2(_v))
# define OC_STATIC_ILOG4(_v) \
(((_v)&0xFF00)?8+OC_STATIC_ILOG3((_v)>>8):OC_STATIC_ILOG3(_v))
# define OC_STATIC_ILOG5(_v) \
(((_v)&0xFFFF0000)?16+OC_STATIC_ILOG4((_v)>>16):OC_STATIC_ILOG4(_v))
# define OC_STATIC_ILOG6(_v) \
(((_v)&0xFFFFFFFF00000000ULL)?32+OC_STATIC_ILOG5((_v)>>32):OC_STATIC_ILOG5(_v))
/**
* OC_STATIC_ILOG_32 - The integer logarithm of an (unsigned, 32-bit) constant.
* @_v: A non-negative 32-bit constant.
* Returns floor(log2(_v))+1, or 0 if _v==0.
* This is the number of bits that would be required to represent _v in two's
* complement notation with all of the leading zeros stripped.
* This macro is suitable for evaluation at compile time, but it should not be
* used on values that can change at runtime, as it operates via exhaustive
* search.
*/
# define OC_STATIC_ILOG_32(_v) (OC_STATIC_ILOG5((ogg_uint32_t)(_v)))
/**
* OC_STATIC_ILOG_64 - The integer logarithm of an (unsigned, 64-bit) constant.
* @_v: A non-negative 64-bit constant.
* Returns floor(log2(_v))+1, or 0 if _v==0.
* This is the number of bits that would be required to represent _v in two's
* complement notation with all of the leading zeros stripped.
* This macro is suitable for evaluation at compile time, but it should not be
* used on values that can change at runtime, as it operates via exhaustive
* search.
*/
# define OC_STATIC_ILOG_64(_v) (OC_STATIC_ILOG6((ogg_int64_t)(_v)))
#define OC_Q57(_v) ((ogg_int64_t)(_v)<<57)
ogg_int64_t oc_bexp64(ogg_int64_t _z);
ogg_int64_t oc_blog64(ogg_int64_t _w);
#endif