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 #if !defined(_mathops_H)

 # define _mathops_H (1)

 # include <ogg/ogg.h>

 # 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

 /**

  * 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)

 #define OC_Q10(_v) ((_v)<<10)

 ogg_int64_t oc_bexp64(ogg_int64_t _z);

 ogg_int64_t oc_blog64(ogg_int64_t _w);

 ogg_uint32_t oc_bexp32_q10(int _z);

 int oc_blog32_q10(ogg_uint32_t _w);

 #endif