diff -Naur leveldb-1.20.org/port/atomic_pointer.h leveldb-1.20.sw/port/atomic_pointer.h
--- leveldb-1.20.org/port/atomic_pointer.h	2022-08-18 15:03:54.160000000 +0000
+++ leveldb-1.20.sw/port/atomic_pointer.h	2022-08-18 15:06:03.380000000 +0000
@@ -37,6 +37,8 @@
 #define ARCH_CPU_ARM_FAMILY 1
 #elif defined(__aarch64__)
 #define ARCH_CPU_ARM64_FAMILY 1
+#elif defined(__sw_64__)
+#define ARCH_CPU_SW_64_FAMILY 1
 #elif defined(__ppc__) || defined(__powerpc__) || defined(__powerpc64__)
 #define ARCH_CPU_PPC_FAMILY 1
 #elif defined(__mips__)
@@ -96,6 +98,13 @@
 }
 #define LEVELDB_HAVE_MEMORY_BARRIER
 
+// SW_64
+#elif defined(ARCH_CPU_SW_64_FAMILY)
+inline void MemoryBarrier() {
+  asm volatile("memb" : : : "memory");
+}
+#define LEVELDB_HAVE_MEMORY_BARRIER
+
 // ARM64
 #elif defined(ARCH_CPU_ARM64_FAMILY)
 inline void MemoryBarrier() {