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Unified Diff: src/mips/lithium-codegen-mips.cc

Issue 9834044: MIPS: First implementation of fast path for instantiation of array literals composed of doubles. (Closed)
Patch Set: Created 8 years, 9 months ago
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Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index 94e8979ba3abe6d30842e7ffd0453af4a3ca38f4..6628d8e1efd508fbc3d2c1b84992c1e4c4b40479 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -4505,34 +4505,51 @@ void LCodeGen::EmitDeepCopy(Handle<JSObject> object,
}
- // Copy elements backing store header.
- ASSERT(!has_elements || elements->IsFixedArray());
if (has_elements) {
+ // Copy elements backing store header.
__ LoadHeapObject(source, elements);
for (int i = 0; i < FixedArray::kHeaderSize; i += kPointerSize) {
__ lw(a2, FieldMemOperand(source, i));
__ sw(a2, FieldMemOperand(result, elements_offset + i));
}
- }
- // Copy elements backing store content.
- ASSERT(!has_elements || elements->IsFixedArray());
- int elements_length = has_elements ? elements->length() : 0;
- for (int i = 0; i < elements_length; i++) {
- int total_offset = elements_offset + FixedArray::OffsetOfElementAt(i);
- Handle<Object> value = JSObject::GetElement(object, i);
- if (value->IsJSObject()) {
- Handle<JSObject> value_object = Handle<JSObject>::cast(value);
- __ Addu(a2, result, Operand(*offset));
- __ sw(a2, FieldMemOperand(result, total_offset));
- __ LoadHeapObject(source, value_object);
- EmitDeepCopy(value_object, result, source, offset);
- } else if (value->IsHeapObject()) {
- __ LoadHeapObject(a2, Handle<HeapObject>::cast(value));
- __ sw(a2, FieldMemOperand(result, total_offset));
+ // Copy elements backing store content.
+ int elements_length = has_elements ? elements->length() : 0;
+ if (elements->IsFixedDoubleArray()) {
+ Handle<FixedDoubleArray> double_array =
+ Handle<FixedDoubleArray>::cast(elements);
+ for (int i = 0; i < elements_length; i++) {
+ int64_t value = double_array->get_representation(i);
+ // We only support little endian mode...
+ int32_t value_low = value & 0xFFFFFFFF;
+ int32_t value_high = value >> 32;
+ int total_offset =
+ elements_offset + FixedDoubleArray::OffsetOfElementAt(i);
+ __ li(a2, Operand(value_low));
+ __ sw(a2, FieldMemOperand(result, total_offset));
+ __ li(a2, Operand(value_high));
+ __ sw(a2, FieldMemOperand(result, total_offset + 4));
+ }
+ } else if (elements->IsFixedArray()) {
+ for (int i = 0; i < elements_length; i++) {
+ int total_offset = elements_offset + FixedArray::OffsetOfElementAt(i);
+ Handle<Object> value = JSObject::GetElement(object, i);
+ if (value->IsJSObject()) {
+ Handle<JSObject> value_object = Handle<JSObject>::cast(value);
+ __ Addu(a2, result, Operand(*offset));
+ __ sw(a2, FieldMemOperand(result, total_offset));
+ __ LoadHeapObject(source, value_object);
+ EmitDeepCopy(value_object, result, source, offset);
+ } else if (value->IsHeapObject()) {
+ __ LoadHeapObject(a2, Handle<HeapObject>::cast(value));
+ __ sw(a2, FieldMemOperand(result, total_offset));
+ } else {
+ __ li(a2, Operand(value));
+ __ sw(a2, FieldMemOperand(result, total_offset));
+ }
+ }
} else {
- __ li(a2, Operand(value));
- __ sw(a2, FieldMemOperand(result, total_offset));
+ UNREACHABLE();
}
}
}
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