From e9899af9b20b1ac55c66b32a8ab354942ef2816f Mon Sep 17 00:00:00 2001
From: Araq <rumpf_a@web.de>
Date: Sun, 2 Aug 2015 01:42:41 +0200
Subject: [PATCH] fixes #3135

---
 lib/system/sets.nim | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/system/sets.nim b/lib/system/sets.nim
index 22d6d57c0f..66877de307 100644
--- a/lib/system/sets.nim
+++ b/lib/system/sets.nim
@@ -19,9 +19,9 @@ proc countBits32(n: int32): int {.compilerproc.} =
   v = (v and 0x33333333'i32) +% ((v shr 2'i32) and 0x33333333'i32)
   result = ((v +% (v shr 4'i32) and 0xF0F0F0F'i32) *% 0x1010101'i32) shr 24'i32
 
-proc countBits64(n: int64): int {.compilerproc.} = 
-  result = countBits32(toU32(n and 0xffff'i64)) +
-           countBits32(toU32(n shr 16'i64))
+proc countBits64(n: int64): int {.compilerproc.} =
+  result = countBits32(toU32(n and 0xffffffff'i64)) +
+           countBits32(toU32(n shr 32'i64))
 
 proc cardSet(s: NimSet, len: int): int {.compilerproc.} =
   result = 0