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Viewing changes to mysys/my_bit.h

  • Committer: Monty Taylor
  • Date: 2009-03-25 21:06:47 UTC
  • mto: This revision was merged to the branch mainline in revision 964.
  • Revision ID: mordred@inaugust.com-20090325210647-7j1tm98gvct3jxsu
Removed legacy_db_type.

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Lines of Context:
mysys/my_bit.h
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static inline uint32_t my_count_bits(uint64_t v)
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{
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#if SIZEOF_LONG_LONG > 4
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  /* The following code is a bit faster on 16 bit machines than if we would
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     only shift v */
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  uint32_t v2=(uint32_t) (v >> 32);
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  return (uint) (unsigned char) (_my_bits_nbits[(unsigned char)  v] +
 
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  return (uint32_t) (unsigned char) (_my_bits_nbits[(unsigned char)  v] +
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                         _my_bits_nbits[(unsigned char) (v >> 8)] +
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                         _my_bits_nbits[(unsigned char) (v >> 16)] +
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                         _my_bits_nbits[(unsigned char) (v >> 24)] +
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                         _my_bits_nbits[(unsigned char) (v2 >> 8)] +
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                         _my_bits_nbits[(unsigned char) (v2 >> 16)] +
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                         _my_bits_nbits[(unsigned char) (v2 >> 24)]);
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#else
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  return (uint) (unsigned char) (_my_bits_nbits[(unsigned char)  v] +
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                         _my_bits_nbits[(unsigned char) (v >> 8)] +
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                         _my_bits_nbits[(unsigned char) (v >> 16)] +
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                         _my_bits_nbits[(unsigned char) (v >> 24)]);
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#endif
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}
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static inline uint32_t my_count_bits_ushort(ushort v)
 
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static inline uint32_t my_count_bits_uint16(uint16_t v)
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{
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  return _my_bits_nbits[v];
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}