From da3c9948e668ae2e6dbcb91183dae88272172e8a Mon Sep 17 00:00:00 2001
From: kd-11 <karokidii@gmail.com>
Date: Wed, 4 Aug 2021 20:05:56 +0300
Subject: [PATCH] rsx: Revert use of std::has_single_bit

- Zero is not a power of 2 in this situation, and we do not want to treat it as such
---
 rpcs3/Emu/RSX/Common/TextureUtils.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rpcs3/Emu/RSX/Common/TextureUtils.cpp b/rpcs3/Emu/RSX/Common/TextureUtils.cpp
index 5a313eadb6..97ff4ae802 100644
--- a/rpcs3/Emu/RSX/Common/TextureUtils.cpp
+++ b/rpcs3/Emu/RSX/Common/TextureUtils.cpp
@@ -14,10 +14,10 @@ namespace utils
 		return std::span<T>(bless<T>(span.data()), sizeof(U) * span.size() / sizeof(T));
 	}
 
-	template <typename T>
+	template <typename T> requires(std::is_integral_v<T> && std::is_unsigned_v<T>)
 	bool is_power_of_2(T value)
 	{
-		return std::has_single_bit(value);
+		return !(value & (value - 1));
 	}
 }