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33 lines
524 B
Go
33 lines
524 B
Go
package hashmap
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import (
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"strconv"
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)
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const (
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// intSizeBytes is the size in byte of an int or uint value.
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intSizeBytes = strconv.IntSize >> 3
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)
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// roundUpPower2 rounds a number to the next power of 2.
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func roundUpPower2(i uintptr) uintptr {
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i--
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i |= i >> 1
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i |= i >> 2
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i |= i >> 4
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i |= i >> 8
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i |= i >> 16
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i |= i >> 32
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i++
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return i
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}
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// log2 computes the binary logarithm of x, rounded up to the next integer.
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func log2(i uintptr) uintptr {
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var n, p uintptr
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for p = 1; p < i; p += p {
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n++
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}
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return n
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}
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