Version 2.2.7
Added support for ES5 date time string format to Date.parse.
Performance improvements in the x64 backend.
git-svn-id: http://v8.googlecode.com/svn/trunk@4565 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index e9aa7a2..e2b54cd 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -167,6 +167,22 @@
}
+void MacroAssembler::InNewSpace(Register object,
+ Register scratch,
+ Condition cc,
+ Label* branch) {
+ ASSERT(cc == equal || cc == not_equal);
+ if (!scratch.is(object)) {
+ movq(scratch, object);
+ }
+ ASSERT(is_int32(static_cast<int64_t>(Heap::NewSpaceMask())));
+ and_(scratch, Immediate(static_cast<int32_t>(Heap::NewSpaceMask())));
+ movq(kScratchRegister, ExternalReference::new_space_start());
+ cmpq(scratch, kScratchRegister);
+ j(cc, branch);
+}
+
+
// Set the remembered set bit for [object+offset].
// object is the object being stored into, value is the object being stored.
// If offset is zero, then the smi_index register contains the array index into
@@ -219,12 +235,7 @@
// Test that the object address is not in the new space. We cannot
// set remembered set bits in the new space.
- movq(scratch, object);
- ASSERT(is_int32(static_cast<int64_t>(Heap::NewSpaceMask())));
- and_(scratch, Immediate(static_cast<int32_t>(Heap::NewSpaceMask())));
- movq(kScratchRegister, ExternalReference::new_space_start());
- cmpq(scratch, kScratchRegister);
- j(equal, &done);
+ InNewSpace(object, scratch, equal, &done);
// The offset is relative to a tagged or untagged HeapObject pointer,
// so either offset or offset + kHeapObjectTag must be a
@@ -2172,6 +2183,7 @@
JSObject* holder,
Register holder_reg,
Register scratch,
+ int save_at_depth,
Label* miss) {
// Make sure there's no overlap between scratch and the other
// registers.
@@ -2181,7 +2193,11 @@
// iteration, reg is an alias for object_reg, on later iterations,
// it is an alias for holder_reg.
Register reg = object_reg;
- int depth = 1;
+ int depth = 0;
+
+ if (save_at_depth == depth) {
+ movq(Operand(rsp, kPointerSize), reg);
+ }
// Check the maps in the prototype chain.
// Traverse the prototype chain from the object and do map checks.
@@ -2231,6 +2247,10 @@
Move(reg, Handle<JSObject>(prototype));
}
+ if (save_at_depth == depth) {
+ movq(Operand(rsp, kPointerSize), reg);
+ }
+
// Go to the next object in the prototype chain.
object = prototype;
}
@@ -2240,7 +2260,7 @@
j(not_equal, miss);
// Log the check depth.
- LOG(IntEvent("check-maps-depth", depth));
+ LOG(IntEvent("check-maps-depth", depth + 1));
// Perform security check for access to the global object and return
// the holder register.