Push version 1.3.9 to trunk.
Optimized stack guard checks on ARM.
Optimized API operations by inlining more in the API.
Optimized creation of objects from simple constructor functions.
Enabled a number of missing optimizations in the 64-bit port.
Implemented native-code support for regular expressions on ARM.
Stopped using the 'sahf' instruction on 64-bit machines that do not support it.
Fixed a bug in the support for forceful termination of JavaScript execution.
git-svn-id: http://v8.googlecode.com/svn/trunk@2811 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index e362cd3..754b74a 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -620,6 +620,146 @@
}
+void MacroAssembler::LoadAllocationTopHelper(
+ Register result,
+ Register result_end,
+ Register scratch,
+ bool result_contains_top_on_entry) {
+ ExternalReference new_space_allocation_top =
+ ExternalReference::new_space_allocation_top_address();
+
+ // Just return if allocation top is already known.
+ if (result_contains_top_on_entry) {
+ // No use of scratch if allocation top is provided.
+ ASSERT(scratch.is(no_reg));
+ return;
+ }
+
+ // Move address of new object to result. Use scratch register if available.
+ if (scratch.is(no_reg)) {
+ mov(result, Operand::StaticVariable(new_space_allocation_top));
+ } else {
+ ASSERT(!scratch.is(result_end));
+ mov(Operand(scratch), Immediate(new_space_allocation_top));
+ mov(result, Operand(scratch, 0));
+ }
+}
+
+
+void MacroAssembler::UpdateAllocationTopHelper(Register result_end,
+ Register scratch) {
+ ExternalReference new_space_allocation_top =
+ ExternalReference::new_space_allocation_top_address();
+
+ // Update new top. Use scratch if available.
+ if (scratch.is(no_reg)) {
+ mov(Operand::StaticVariable(new_space_allocation_top), result_end);
+ } else {
+ mov(Operand(scratch, 0), result_end);
+ }
+}
+
+void MacroAssembler::AllocateObjectInNewSpace(
+ int object_size,
+ Register result,
+ Register result_end,
+ Register scratch,
+ Label* gc_required,
+ bool result_contains_top_on_entry) {
+ ASSERT(!result.is(result_end));
+
+ // Load address of new object into result.
+ LoadAllocationTopHelper(result,
+ result_end,
+ scratch,
+ result_contains_top_on_entry);
+
+ // Calculate new top and bail out if new space is exhausted.
+ ExternalReference new_space_allocation_limit =
+ ExternalReference::new_space_allocation_limit_address();
+ lea(result_end, Operand(result, object_size));
+ cmp(result_end, Operand::StaticVariable(new_space_allocation_limit));
+ j(above, gc_required, not_taken);
+
+ // Update allocation top.
+ UpdateAllocationTopHelper(result_end, scratch);
+}
+
+
+void MacroAssembler::AllocateObjectInNewSpace(
+ int header_size,
+ ScaleFactor element_size,
+ Register element_count,
+ Register result,
+ Register result_end,
+ Register scratch,
+ Label* gc_required,
+ bool result_contains_top_on_entry) {
+ ASSERT(!result.is(result_end));
+
+ // Load address of new object into result.
+ LoadAllocationTopHelper(result,
+ result_end,
+ scratch,
+ result_contains_top_on_entry);
+
+ // Calculate new top and bail out if new space is exhausted.
+ ExternalReference new_space_allocation_limit =
+ ExternalReference::new_space_allocation_limit_address();
+ lea(result_end, Operand(result, element_count, element_size, header_size));
+ cmp(result_end, Operand::StaticVariable(new_space_allocation_limit));
+ j(above, gc_required);
+
+ // Update allocation top.
+ UpdateAllocationTopHelper(result_end, scratch);
+}
+
+
+void MacroAssembler::AllocateObjectInNewSpace(
+ Register object_size,
+ Register result,
+ Register result_end,
+ Register scratch,
+ Label* gc_required,
+ bool result_contains_top_on_entry) {
+ ASSERT(!result.is(result_end));
+
+ // Load address of new object into result.
+ LoadAllocationTopHelper(result,
+ result_end,
+ scratch,
+ result_contains_top_on_entry);
+
+
+ // Calculate new top and bail out if new space is exhausted.
+ ExternalReference new_space_allocation_limit =
+ ExternalReference::new_space_allocation_limit_address();
+ if (!object_size.is(result_end)) {
+ mov(result_end, object_size);
+ }
+ add(result_end, Operand(result));
+ cmp(result_end, Operand::StaticVariable(new_space_allocation_limit));
+ j(above, gc_required, not_taken);
+
+ // Update allocation top.
+ UpdateAllocationTopHelper(result_end, scratch);
+}
+
+
+void MacroAssembler::UndoAllocationInNewSpace(Register object) {
+ ExternalReference new_space_allocation_top =
+ ExternalReference::new_space_allocation_top_address();
+
+ // Make sure the object has no tag before resetting top.
+ and_(Operand(object), Immediate(~kHeapObjectTagMask));
+#ifdef DEBUG
+ cmp(object, Operand::StaticVariable(new_space_allocation_top));
+ Check(below, "Undo allocation of non allocated memory");
+#endif
+ mov(Operand::StaticVariable(new_space_allocation_top), object);
+}
+
+
void MacroAssembler::NegativeZeroTest(CodeGenerator* cgen,
Register result,
Register op,