From cdc619a8a62e9c4d5dafe5b7ed8380d3be37020a Mon Sep 17 00:00:00 2001
From: Michael Scire <SciresM@gmail.com>
Date: Tue, 22 Mar 2022 23:10:09 -0700
Subject: [PATCH] kern: on second thought, gcc built ins are for chumps

---
 libraries/libmesosphere/include/mesosphere/kern_select_cpu.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/libmesosphere/include/mesosphere/kern_select_cpu.hpp b/libraries/libmesosphere/include/mesosphere/kern_select_cpu.hpp
index 55e030bdb..58945e6f2 100644
--- a/libraries/libmesosphere/include/mesosphere/kern_select_cpu.hpp
+++ b/libraries/libmesosphere/include/mesosphere/kern_select_cpu.hpp
@@ -70,7 +70,7 @@ namespace ams::kern {
         static constexpr inline u64 ConvertVirtualCoreMaskToPhysical(u64 v_core_mask) {
             u64 p_core_mask = 0;
             while (v_core_mask != 0) {
-                const u64 next = __builtin_ctzll(v_core_mask);
+                const u64 next = util::CountTrailingZeros(v_core_mask);
                 v_core_mask &= ~(static_cast<u64>(1) << next);
                 p_core_mask |=  (static_cast<u64>(1) << cpu::VirtualToPhysicalCoreMap[next]);
             }