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Unified Diff: src/x64/codegen-x64.cc

Issue 3141022: Using array index hash code for string-to-number conversion. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 10 years, 4 months ago
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Index: src/x64/codegen-x64.cc
===================================================================
--- src/x64/codegen-x64.cc (revision 5357)
+++ src/x64/codegen-x64.cc (working copy)
@@ -7223,6 +7223,34 @@
}
+void CodeGenerator::GenerateHasCachedArrayIndex(ZoneList<Expression*>* args) {
+ ASSERT(args->length() == 1);
+ Load(args->at(0));
+ Result value = frame_->Pop();
+ value.ToRegister();
+ ASSERT(value.is_valid());
+ __ testl(FieldOperand(value.reg(), String::kHashFieldOffset),
+ Immediate(String::kContainsCachedArrayIndexMask));
+ value.Unuse();
+ destination()->Split(zero);
+}
+
+
+void CodeGenerator::GenerateGetCachedArrayIndex(ZoneList<Expression*>* args) {
+ ASSERT(args->length() == 1);
+ Load(args->at(0));
+ Result string = frame_->Pop();
+ string.ToRegister();
+
+ Result number = allocator()->Allocate();
+ ASSERT(number.is_valid());
+ __ movl(number.reg(), FieldOperand(string.reg(), String::kHashFieldOffset));
+ __ IndexFromHash(number.reg(), number.reg());
+ string.Unuse();
+ frame_->Push(&number);
+}
+
+
void CodeGenerator::VisitCallRuntime(CallRuntime* node) {
if (CheckForInlineRuntimeCall(node)) {
return;
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