File zero-atomic_copy64.patch of Package java-9-openjdk

--- jdk9/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.hpp	2018-01-22 16:19:02.000000000 +0100
+++ jdk9/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.hpp	2019-04-08 11:34:04.644649534 +0200
@@ -36,20 +36,36 @@
 
   // Atomically copy 64 bits of data
   static void atomic_copy64(volatile void *src, volatile void *dst) {
-#if defined(PPC32)
+#if defined(PPC32) && !defined(__SPE__)
     double tmp;
-    asm volatile ("lfd  %0, 0(%1)\n"
-                  "stfd %0, 0(%2)\n"
-                  : "=f"(tmp)
-                  : "b"(src), "b"(dst));
+    asm volatile ("lfd  %0, %2\n"
+                  "stfd %0, %1\n"
+                  : "=&f"(tmp), "=Q"(*(volatile double*)dst)
+                  : "Q"(*(volatile double*)src));
+#elif defined(PPC32) && defined(__SPE__)
+    long tmp;
+    asm volatile ("evldd  %0, %2\n"
+                  "evstdd %0, %1\n"
+                  : "=&r"(tmp), "=Q"(*(volatile long*)dst)
+                  : "Q"(*(volatile long*)src));
 #elif defined(S390) && !defined(_LP64)
     double tmp;
-    asm volatile ("ld  %0, 0(%1)\n"
-                  "std %0, 0(%2)\n"
+    asm volatile ("ld  %0, %2\n"
+                  "std %0, %1\n"
+                  : "=&f"(tmp), "=Q"(*(volatile double*)dst)
+                  : "Q"(*(volatile double*)src));
+#elif defined(__ARM_ARCH_7A__)
+    // Note that a ldrexd + clrex combination is only needed for
+    // correctness on the OS level (context-switches). In this
+    // case, clrex *may* be beneficial for performance. For now
+    // don't bother with clrex as this is Zero.
+    jlong tmp;
+    asm volatile ("ldrexd  %0, [%1]\n"
                   : "=r"(tmp)
-                  : "a"(src), "a"(dst));
+                  : "r"(src), "m"(src));
+    *(jlong *) dst = tmp;
 #else
-    *(jlong *) dst = *(jlong *) src;
+    *(jlong *) dst = *(const jlong *) src;
 #endif
   }