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ade75a1483
* fixes `card` undefined misalignment behavior * Update lib/system/sets.nim --------- Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
29 lines
667 B
Nim
29 lines
667 B
Nim
#
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#
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# Nim's Runtime Library
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# (c) Copyright 2012 Andreas Rumpf
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#
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# See the file "copying.txt", included in this
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# distribution, for details about the copyright.
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#
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# set handling
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proc cardSetImpl(s: ptr UncheckedArray[uint8], len: int): int {.inline.} =
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var i = 0
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result = 0
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var num = 0'u64
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when defined(x86) or defined(amd64):
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while i < len - 8:
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copyMem(addr num, addr s[i], 8)
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inc(result, countBits64(num))
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inc(i, 8)
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while i < len:
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inc(result, countBits32(uint32(s[i])))
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inc(i, 1)
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proc cardSet(s: ptr UncheckedArray[uint8], len: int): int {.compilerproc, inline.} =
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result = cardSetImpl(s, len)
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