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34 lines
624 B
Plaintext
34 lines
624 B
Plaintext
NAME
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popcnt - number of bit that match a given value
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SYNOPSIS
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popcnt(x [,bitval])
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TYPES
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x number (real or integer)
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bitval 0 or 1
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return number
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DESCRIPTION
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Count the number of bits in abs(x) that match bitval. The default
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bitval is 1 which counts the number of 1 bits.
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The popcnt function is equivalent to #x when x is an integer.
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EXAMPLE
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> print popcnt(32767), popcnt(3/2), popcnt(pi(),0), popcnt(pi(),1)
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15 3 69 65
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> print popcnt(randombit(128), 0), popcnt(randombit(128), 1)
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61 64
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LIMITS
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none
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LIBRARY
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long zpopcnt(ZVALUE z, int bitval)
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SEE ALSO
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none
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