From e6f1888391125302f7c8292799763d084241698b Mon Sep 17 00:00:00 2001
From: aikiriao <samuraiaiki@gmail.com>
Date: Fri, 21 Jun 2024 21:40:32 +0900
Subject: [PATCH] use intrinsics function.

---
 libs/srla_internal/include/srla_utility.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libs/srla_internal/include/srla_utility.h b/libs/srla_internal/include/srla_utility.h
index 98ce205..e64328c 100644
--- a/libs/srla_internal/include/srla_utility.h
+++ b/libs/srla_internal/include/srla_utility.h
@@ -39,11 +39,11 @@
 /* ビルトイン関数を使用 */
 #define SRLAUTILITY_NLZ(x) (((x) > 0) ? (uint32_t)__builtin_clz(x) : 32U)
 #elif defined(_MSC_VER)
+#include <intrin.h>
 /* ビルトイン関数を使用 */
 __inline uint32_t SRLAUTILITY_NLZ(uint32_t x)
 {
-    unsigned long result;
-    return (_BitScanReverse(&result, x) != 0) ? (31U - result) : 32U;
+    return __lzcnt(x);
 }
 #else
 /* ソフトウェア実装を使用 */