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Unified Diff: src/x64/code-stubs-x64.cc

Issue 6744006: Add binary-op stub variant to handle oddball objects more efficiently. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 9 years, 9 months ago
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Index: src/x64/code-stubs-x64.cc
===================================================================
--- src/x64/code-stubs-x64.cc (revision 7395)
+++ src/x64/code-stubs-x64.cc (working copy)
@@ -1062,6 +1062,9 @@
case TRBinaryOpIC::HEAP_NUMBER:
GenerateHeapNumberStub(masm);
break;
+ case TRBinaryOpIC::ODDBALL:
+ GenerateOddballStub(masm);
+ break;
case TRBinaryOpIC::STRING:
GenerateStringStub(masm);
break;
@@ -1438,6 +1441,39 @@
}
+void TypeRecordingBinaryOpStub::GenerateOddballStub(MacroAssembler* masm) {
+ Label call_runtime;
+
+ if (op_ == Token::ADD) {
+ // Handle string addition here, because it is the only operation
+ // that does not do a ToNumber conversion on the operands.
+ GenerateStringAddCode(masm);
+ }
+
+ // Convert oddball arguments to numbers.
+ NearLabel check, done;
+ __ CompareRoot(rdx, Heap::kUndefinedValueRootIndex);
+ __ j(not_equal, &check);
+ if (Token::IsBitOp(op_)) {
+ __ xor_(rdx, rdx);
+ } else {
+ __ LoadRoot(rdx, Heap::kNanValueRootIndex);
+ }
+ __ jmp(&done);
+ __ bind(&check);
+ __ CompareRoot(rax, Heap::kUndefinedValueRootIndex);
+ __ j(not_equal, &done);
+ if (Token::IsBitOp(op_)) {
+ __ xor_(rax, rax);
+ } else {
+ __ LoadRoot(rax, Heap::kNanValueRootIndex);
+ }
+ __ bind(&done);
+
+ GenerateHeapNumberStub(masm);
+}
+
+
void TypeRecordingBinaryOpStub::GenerateHeapNumberStub(MacroAssembler* masm) {
Label gc_required, not_number;
GenerateFloatingPointCode(masm, &gc_required, &not_number);
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