Introduce intrinsics for double values in Javascript.

src/full-codegen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
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   ASSERT(args->length() == 2);
   EmitGeneratorResume(args->at(0), args->at(1), JSGeneratorObject::THROW);
 }
 
 
 void FullCodeGenerator::EmitDebugBreakInOptimizedCode(CallRuntime* expr) {
   context()->Plug(handle(Smi::FromInt(0), isolate()));
 }
 
 
+void FullCodeGenerator::EmitDoubleHi(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT(args->length() == 1);
+  VisitForStackValue(args->at(0));
+  masm()->CallRuntime(Runtime::kDoubleHi, 1);

[Sven Panne, 2014/03/03 11:28:27]

Hopefully the usual benchmarks will not force us to do this directly in an
architecture-dependent way. Calls into the runtime are costly and if we run full
code "long" enough... :-/

+  context()->Plug(result_register());
+}
+
+
+void FullCodeGenerator::EmitDoubleLo(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT(args->length() == 1);
+  VisitForStackValue(args->at(0));
+  masm()->CallRuntime(Runtime::kDoubleLo, 1);
+  context()->Plug(result_register());
+}
+
+
+void FullCodeGenerator::EmitConstructDouble(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT(args->length() == 2);
+  VisitForStackValue(args->at(0));
+  VisitForStackValue(args->at(1));
+  masm()->CallRuntime(Runtime::kConstructDouble, 2);
+  context()->Plug(result_register());
+}
+
+
 void FullCodeGenerator::VisitBinaryOperation(BinaryOperation* expr) {
   switch (expr->op()) {
     case Token::COMMA:
       return VisitComma(expr);
     case Token::OR:
     case Token::AND:
       return VisitLogicalExpression(expr);
     default:
       return VisitArithmeticExpression(expr);
   }
@@ skipping 765 matching lines @@
   }
   return true;
 }
 #endif  // DEBUG
 
 
 #undef __
 
 
 } }  // namespace v8::internal