Fix a bug in ctzll

2ecdbb98 · Junekey Jeon · Victor Zverovich · 6f81ea15 · 2ecdbb98
Commit 2ecdbb98 authored Sep 18, 2020 by Junekey Jeon Committed by Victor Zverovich Sep 19, 2020
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include/fmt/format.h include/fmt/format.h +3 -2

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--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -281,10 +281,11 @@ inline int ctzll(uint64_t x) {
  _BitScanForward64(&r, x);
 #  else
  // Scan the low 32 bits.
-  if (_BitScanForward(&r, static_cast<uint32_t>(x))) return r;
+  if (_BitScanForward(&r, static_cast<uint32_t>(x)))
+      return static_cast<int>(r);

  // Scan the high 32 bits.
-  _BitScanReverse(&r, static_cast<uint32_t>(x >> 32));
+  _BitScanForward(&r, static_cast<uint32_t>(x >> 32));
  r += 32;
 #  endif