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use while

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This commit is contained in:
Brent Pedersen 2019-09-11 15:40:34 -06:00
commit 5b923cd149
1 changed files with 5 additions and 4 deletions
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9
lib/system/sets.nim
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@ -30,11 +30,12 @@ proc countBits64(n: uint64): int {.compilerproc, inline.} =
result = ((v * 0x0101010101010101'u64) shr 56'u64).int result = ((v * 0x0101010101010101'u64) shr 56'u64).int
proc cardSet(s: NimSet, len: int): int {.compilerproc, inline.} = proc cardSet(s: NimSet, len: int): int {.compilerproc, inline.} =
var j = -1 var i = 0
when defined(x86) or defined(amd64): when defined(x86) or defined(amd64):
for i in countup(0, len - 8, 8): while i < len - 8:
inc(result, countBits64((cast[ptr uint64](s[i].unsafeAddr))[])) inc(result, countBits64((cast[ptr uint64](s[i].unsafeAddr))[]))
j = i + 7 inc(i, 8)
for i in (j + 1) ..< len: while i < len:
inc(result, countBits32(uint32(s[i]))) inc(result, countBits32(uint32(s[i])))
inc(i, 1)