attributes: Don't try to use _BitScanReverse64 on MSVC/ARM

Despite what MSDN says, this intrinsic doesn't exist for ARM, only for ARM64.
2018-10-19 11:51:59 +03:00
parent 9dcdf20ce9
commit 227b7eae7a
1 changed files with 1 additions and 1 deletions
@@ -87,7 +87,7 @@ static inline int clz(const unsigned int mask) {
    return (31 - leading_zero);
 }

-#ifndef _M_IX86
+#ifdef _WIN64
 static inline int clzll(const unsigned long long mask) {
    unsigned long leading_zero = 0;
    _BitScanReverse64(&leading_zero, mask);