# HG changeset patch
# User kshefov
# Date 1447427681 -10800
# Node ID c1b52e665b47f65816a4525b9dfa01dd1cc3c05a
# Parent  5737d346238ea16235a6a10c4082b540d91963a1
8131778: java disables UseAES flag when using VIS=2 on sparc
Reviewed-by: iignatyev, kvn

diff -r 5737d346238e -r c1b52e665b47 hotspot/src/cpu/sparc/vm/vm_version_sparc.cpp
--- a/hotspot/src/cpu/sparc/vm/vm_version_sparc.cpp	Thu Nov 12 13:30:35 2015 +0100
+++ b/hotspot/src/cpu/sparc/vm/vm_version_sparc.cpp	Fri Nov 13 18:14:41 2015 +0300
@@ -229,35 +229,35 @@
 
   // SPARC T4 and above should have support for AES instructions
   if (has_aes()) {
-    if (UseVIS > 2) { // AES intrinsics use MOVxTOd/MOVdTOx which are VIS3
-      if (FLAG_IS_DEFAULT(UseAES)) {
-        FLAG_SET_DEFAULT(UseAES, true);
+    if (FLAG_IS_DEFAULT(UseAES)) {
+      FLAG_SET_DEFAULT(UseAES, true);
+    }
+    if (!UseAES) {
+      if (UseAESIntrinsics && !FLAG_IS_DEFAULT(UseAESIntrinsics)) {
+        warning("AES intrinsics require UseAES flag to be enabled. Intrinsics will be disabled.");
       }
-      if (FLAG_IS_DEFAULT(UseAESIntrinsics)) {
-        FLAG_SET_DEFAULT(UseAESIntrinsics, true);
-      }
-      // we disable both the AES flags if either of them is disabled on the command line
-      if (!UseAES || !UseAESIntrinsics) {
-        FLAG_SET_DEFAULT(UseAES, false);
+      FLAG_SET_DEFAULT(UseAESIntrinsics, false);
+    } else {
+      // The AES intrinsic stubs require AES instruction support (of course)
+      // but also require VIS3 mode or higher for instructions it use.
+      if (UseVIS > 2) {
+        if (FLAG_IS_DEFAULT(UseAESIntrinsics)) {
+          FLAG_SET_DEFAULT(UseAESIntrinsics, true);
+        }
+      } else {
+        if (UseAESIntrinsics && !FLAG_IS_DEFAULT(UseAESIntrinsics)) {
+          warning("SPARC AES intrinsics require VIS3 instructions. Intrinsics will be disabled.");
+        }
         FLAG_SET_DEFAULT(UseAESIntrinsics, false);
       }
-    } else {
-        if (UseAES || UseAESIntrinsics) {
-          warning("SPARC AES intrinsics require VIS3 instruction support. Intrinsics will be disabled.");
-          if (UseAES) {
-            FLAG_SET_DEFAULT(UseAES, false);
-          }
-          if (UseAESIntrinsics) {
-            FLAG_SET_DEFAULT(UseAESIntrinsics, false);
-          }
-        }
     }
   } else if (UseAES || UseAESIntrinsics) {
-    warning("AES instructions are not available on this CPU");
-    if (UseAES) {
+    if (UseAES && !FLAG_IS_DEFAULT(UseAES)) {
+      warning("AES instructions are not available on this CPU");
       FLAG_SET_DEFAULT(UseAES, false);
     }
-    if (UseAESIntrinsics) {
+    if (UseAESIntrinsics && !FLAG_IS_DEFAULT(UseAESIntrinsics)) {
+      warning("AES intrinsics are not available on this CPU");
       FLAG_SET_DEFAULT(UseAESIntrinsics, false);
     }
   }
diff -r 5737d346238e -r c1b52e665b47 hotspot/src/cpu/x86/vm/vm_version_x86.cpp
--- a/hotspot/src/cpu/x86/vm/vm_version_x86.cpp	Thu Nov 12 13:30:35 2015 +0100
+++ b/hotspot/src/cpu/x86/vm/vm_version_x86.cpp	Fri Nov 13 18:14:41 2015 +0300
@@ -632,12 +632,36 @@
   // Use AES instructions if available.
   if (supports_aes()) {
     if (FLAG_IS_DEFAULT(UseAES)) {
-      UseAES = true;
+      FLAG_SET_DEFAULT(UseAES, true);
     }
-  } else if (UseAES) {
-    if (!FLAG_IS_DEFAULT(UseAES))
+    if (!UseAES) {
+      if (UseAESIntrinsics && !FLAG_IS_DEFAULT(UseAESIntrinsics)) {
+        warning("AES intrinsics require UseAES flag to be enabled. Intrinsics will be disabled.");
+      }
+      FLAG_SET_DEFAULT(UseAESIntrinsics, false);
+    } else {
+      if (UseSSE > 2) {
+        if (FLAG_IS_DEFAULT(UseAESIntrinsics)) {
+          FLAG_SET_DEFAULT(UseAESIntrinsics, true);
+        }
+      } else {
+        // The AES intrinsic stubs require AES instruction support (of course)
+        // but also require sse3 mode or higher for instructions it use.
+        if (UseAESIntrinsics && !FLAG_IS_DEFAULT(UseAESIntrinsics)) {
+          warning("X86 AES intrinsics require SSE3 instructions or higher. Intrinsics will be disabled.");
+        }
+        FLAG_SET_DEFAULT(UseAESIntrinsics, false);
+      }
+    }
+  } else if (UseAES || UseAESIntrinsics) {
+    if (UseAES && !FLAG_IS_DEFAULT(UseAES)) {
       warning("AES instructions are not available on this CPU");
-    FLAG_SET_DEFAULT(UseAES, false);
+      FLAG_SET_DEFAULT(UseAES, false);
+    }
+    if (UseAESIntrinsics && !FLAG_IS_DEFAULT(UseAESIntrinsics)) {
+      warning("AES intrinsics are not available on this CPU");
+      FLAG_SET_DEFAULT(UseAESIntrinsics, false);
+    }
   }
 
   // Use CLMUL instructions if available.
@@ -673,18 +697,6 @@
     FLAG_SET_DEFAULT(UseCRC32CIntrinsics, false);
   }
 
-  // The AES intrinsic stubs require AES instruction support (of course)
-  // but also require sse3 mode for instructions it use.
-  if (UseAES && (UseSSE > 2)) {
-    if (FLAG_IS_DEFAULT(UseAESIntrinsics)) {
-      UseAESIntrinsics = true;
-    }
-  } else if (UseAESIntrinsics) {
-    if (!FLAG_IS_DEFAULT(UseAESIntrinsics))
-      warning("AES intrinsics are not available on this CPU");
-    FLAG_SET_DEFAULT(UseAESIntrinsics, false);
-  }
-
   // GHASH/GCM intrinsics
   if (UseCLMUL && (UseSSE > 2)) {
     if (FLAG_IS_DEFAULT(UseGHASHIntrinsics)) {