8143584: Load constant pool tag and class status with load acquire
authorhshi
Thu, 26 Nov 2015 15:37:04 +0000
changeset 34498 54f9242e3f81
parent 34227 001483ee066c
child 34499 343abbc06572
8143584: Load constant pool tag and class status with load acquire Reviewed-by: roland, aph
hotspot/src/cpu/aarch64/vm/templateTable_aarch64.cpp
--- a/hotspot/src/cpu/aarch64/vm/templateTable_aarch64.cpp	Thu Nov 26 02:09:46 2015 +0100
+++ b/hotspot/src/cpu/aarch64/vm/templateTable_aarch64.cpp	Thu Nov 26 15:37:04 2015 +0000
@@ -386,7 +386,8 @@
 
   // get type
   __ add(r3, r1, tags_offset);
-  __ ldrb(r3, Address(r0, r3));
+  __ lea(r3, Address(r0, r3));
+  __ ldarb(r3, r3);
 
   // unresolved class - get the resolved class
   __ cmp(r3, JVM_CONSTANT_UnresolvedClass);
@@ -3316,7 +3317,8 @@
   // how Constant Pool is updated (see ConstantPool::klass_at_put)
   const int tags_offset = Array<u1>::base_offset_in_bytes();
   __ lea(rscratch1, Address(r0, r3, Address::lsl(0)));
-  __ ldrb(rscratch1, Address(rscratch1, tags_offset));
+  __ lea(rscratch1, Address(rscratch1, tags_offset));
+  __ ldarb(rscratch1, rscratch1);
   __ cmp(rscratch1, JVM_CONSTANT_Class);
   __ br(Assembler::NE, slow_case);
 
@@ -3460,7 +3462,8 @@
   __ get_unsigned_2_byte_index_at_bcp(r19, 1); // r19=index
   // See if bytecode has already been quicked
   __ add(rscratch1, r3, Array<u1>::base_offset_in_bytes());
-  __ ldrb(r1, Address(rscratch1, r19));
+  __ lea(r1, Address(rscratch1, r19));
+  __ ldarb(r1, r1);
   __ cmp(r1, JVM_CONSTANT_Class);
   __ br(Assembler::EQ, quicked);
 
@@ -3514,7 +3517,8 @@
   __ get_unsigned_2_byte_index_at_bcp(r19, 1); // r19=index
   // See if bytecode has already been quicked
   __ add(rscratch1, r3, Array<u1>::base_offset_in_bytes());
-  __ ldrb(r1, Address(rscratch1, r19));
+  __ lea(r1, Address(rscratch1, r19));
+  __ ldarb(r1, r1);
   __ cmp(r1, JVM_CONSTANT_Class);
   __ br(Assembler::EQ, quicked);