Version 3.19.0
Deprecated Context::New which returns Persistent.
Added Persistent<T>::Reset which disposes the handle and redirects it to point to another object.
Deprecated WriteAscii and MayContainNonAscii.
Exposed AssertNoAllocation to API.
Performance and stability improvements on all platforms.
git-svn-id: http://v8.googlecode.com/svn/trunk@14603 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/mips/stub-cache-mips.cc b/src/mips/stub-cache-mips.cc
index aeb26ee..80ab31a 100644
--- a/src/mips/stub-cache-mips.cc
+++ b/src/mips/stub-cache-mips.cc
@@ -307,11 +307,13 @@
}
-void StubCompiler::DoGenerateFastPropertyLoad(MacroAssembler* masm,
- Register dst,
- Register src,
- bool inobject,
- int index) {
+void StubCompiler::GenerateFastPropertyLoad(MacroAssembler* masm,
+ Register dst,
+ Register src,
+ bool inobject,
+ int index,
+ Representation representation) {
+ ASSERT(!FLAG_track_double_fields || !representation.IsDouble());
int offset = index * kPointerSize;
if (!inobject) {
// Calculate the offset into the properties array.
@@ -442,8 +444,10 @@
Register value_reg,
Register scratch1,
Register scratch2,
+ Register scratch3,
Label* miss_label,
- Label* miss_restore_name) {
+ Label* miss_restore_name,
+ Label* slow) {
// a0 : value.
Label exit;
@@ -465,16 +469,6 @@
// Ensure no transitions to deprecated maps are followed.
__ CheckMapDeprecated(transition, scratch1, miss_label);
- if (FLAG_track_fields && representation.IsSmi()) {
- __ JumpIfNotSmi(value_reg, miss_label);
- } else if (FLAG_track_double_fields && representation.IsDouble()) {
- Label do_store;
- __ JumpIfSmi(value_reg, &do_store);
- __ CheckMap(value_reg, scratch1, Heap::kHeapNumberMapRootIndex,
- miss_label, DONT_DO_SMI_CHECK);
- __ bind(&do_store);
- }
-
// Check that we are allowed to write this.
if (object->GetPrototype()->IsJSObject()) {
JSObject* holder;
@@ -490,7 +484,7 @@
}
Register holder_reg = CheckPrototypes(
object, receiver_reg, Handle<JSObject>(holder), name_reg,
- scratch1, scratch2, name, miss_restore_name);
+ scratch1, scratch2, name, miss_restore_name, SKIP_RECEIVER);
// If no property was found, and the holder (the last object in the
// prototype chain) is in slow mode, we need to do a negative lookup on the
// holder.
@@ -509,6 +503,30 @@
}
}
+ Register storage_reg = name_reg;
+
+ if (FLAG_track_fields && representation.IsSmi()) {
+ __ JumpIfNotSmi(value_reg, miss_restore_name);
+ } else if (FLAG_track_double_fields && representation.IsDouble()) {
+ Label do_store, heap_number;
+ __ LoadRoot(scratch3, Heap::kHeapNumberMapRootIndex);
+ __ AllocateHeapNumber(storage_reg, scratch1, scratch2, scratch3, slow);
+
+ __ JumpIfNotSmi(value_reg, &heap_number);
+ __ SmiUntag(scratch1, value_reg);
+ __ mtc1(scratch1, f6);
+ __ cvt_d_w(f4, f6);
+ __ jmp(&do_store);
+
+ __ bind(&heap_number);
+ __ CheckMap(value_reg, scratch1, Heap::kHeapNumberMapRootIndex,
+ miss_restore_name, DONT_DO_SMI_CHECK);
+ __ ldc1(f4, FieldMemOperand(value_reg, HeapNumber::kValueOffset));
+
+ __ bind(&do_store);
+ __ sdc1(f4, FieldMemOperand(storage_reg, HeapNumber::kValueOffset));
+ }
+
// Stub never generated for non-global objects that require access
// checks.
ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
@@ -536,7 +554,7 @@
__ RecordWriteField(receiver_reg,
HeapObject::kMapOffset,
scratch1,
- name_reg,
+ scratch2,
kRAHasNotBeenSaved,
kDontSaveFPRegs,
OMIT_REMEMBERED_SET,
@@ -554,7 +572,11 @@
if (index < 0) {
// Set the property straight into the object.
int offset = object->map()->instance_size() + (index * kPointerSize);
- __ sw(value_reg, FieldMemOperand(receiver_reg, offset));
+ if (FLAG_track_double_fields && representation.IsDouble()) {
+ __ sw(storage_reg, FieldMemOperand(receiver_reg, offset));
+ } else {
+ __ sw(value_reg, FieldMemOperand(receiver_reg, offset));
+ }
if (!FLAG_track_fields || !representation.IsSmi()) {
// Skip updating write barrier if storing a smi.
@@ -562,7 +584,11 @@
// Update the write barrier for the array address.
// Pass the now unused name_reg as a scratch register.
- __ mov(name_reg, value_reg);
+ if (!FLAG_track_double_fields || !representation.IsDouble()) {
+ __ mov(name_reg, value_reg);
+ } else {
+ ASSERT(storage_reg.is(name_reg));
+ }
__ RecordWriteField(receiver_reg,
offset,
name_reg,
@@ -576,7 +602,11 @@
// Get the properties array
__ lw(scratch1,
FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
- __ sw(value_reg, FieldMemOperand(scratch1, offset));
+ if (FLAG_track_double_fields && representation.IsDouble()) {
+ __ sw(storage_reg, FieldMemOperand(scratch1, offset));
+ } else {
+ __ sw(value_reg, FieldMemOperand(scratch1, offset));
+ }
if (!FLAG_track_fields || !representation.IsSmi()) {
// Skip updating write barrier if storing a smi.
@@ -584,6 +614,11 @@
// Update the write barrier for the array address.
// Ok to clobber receiver_reg and name_reg, since we return.
+ if (!FLAG_track_double_fields || !representation.IsDouble()) {
+ __ mov(name_reg, value_reg);
+ } else {
+ ASSERT(storage_reg.is(name_reg));
+ }
__ mov(name_reg, value_reg);
__ RecordWriteField(scratch1,
offset,
@@ -643,11 +678,37 @@
if (FLAG_track_fields && representation.IsSmi()) {
__ JumpIfNotSmi(value_reg, miss_label);
} else if (FLAG_track_double_fields && representation.IsDouble()) {
- Label do_store;
- __ JumpIfSmi(value_reg, &do_store);
- __ CheckMap(value_reg, scratch1, Heap::kHeapNumberMapRootIndex,
+ // Load the double storage.
+ if (index < 0) {
+ int offset = object->map()->instance_size() + (index * kPointerSize);
+ __ lw(scratch1, FieldMemOperand(receiver_reg, offset));
+ } else {
+ __ lw(scratch1,
+ FieldMemOperand(receiver_reg, JSObject::kPropertiesOffset));
+ int offset = index * kPointerSize + FixedArray::kHeaderSize;
+ __ lw(scratch1, FieldMemOperand(scratch1, offset));
+ }
+
+ // Store the value into the storage.
+ Label do_store, heap_number;
+ __ JumpIfNotSmi(value_reg, &heap_number);
+ __ SmiUntag(scratch2, value_reg);
+ __ mtc1(scratch2, f6);
+ __ cvt_d_w(f4, f6);
+ __ jmp(&do_store);
+
+ __ bind(&heap_number);
+ __ CheckMap(value_reg, scratch2, Heap::kHeapNumberMapRootIndex,
miss_label, DONT_DO_SMI_CHECK);
+ __ ldc1(f4, FieldMemOperand(value_reg, HeapNumber::kValueOffset));
+
__ bind(&do_store);
+ __ sdc1(f4, FieldMemOperand(scratch1, HeapNumber::kValueOffset));
+ // Return the value (register v0).
+ ASSERT(value_reg.is(a0));
+ __ mov(v0, a0);
+ __ Ret();
+ return;
}
// TODO(verwaest): Share this code as a code stub.
@@ -1308,9 +1369,20 @@
void BaseLoadStubCompiler::GenerateLoadField(Register reg,
Handle<JSObject> holder,
- PropertyIndex index) {
- GenerateFastPropertyLoad(masm(), v0, reg, holder, index);
- __ Ret();
+ PropertyIndex field,
+ Representation representation) {
+ if (!reg.is(receiver())) __ mov(receiver(), reg);
+ if (kind() == Code::LOAD_IC) {
+ LoadFieldStub stub(field.is_inobject(holder),
+ field.translate(holder),
+ representation);
+ GenerateTailCall(masm(), stub.GetCode(isolate()));
+ } else {
+ KeyedLoadFieldStub stub(field.is_inobject(holder),
+ field.translate(holder),
+ representation);
+ GenerateTailCall(masm(), stub.GetCode(isolate()));
+ }
}
@@ -1540,7 +1612,8 @@
// Do the right check and compute the holder register.
Register reg = CheckPrototypes(object, a0, holder, a1, a3, t0, name, &miss);
- GenerateFastPropertyLoad(masm(), a1, reg, holder, index);
+ GenerateFastPropertyLoad(masm(), a1, reg, index.is_inobject(holder),
+ index.translate(holder), Representation::Tagged());
GenerateCallFunction(masm(), object, arguments(), &miss, extra_state_);