Implement date library functions in C++.

src/arm/full-codegen-arm.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
@@ skipping 2915 matching lines @@
   // If the object is not a value type, return the object.
   __ CompareObjectType(r0, r1, r1, JS_VALUE_TYPE);
   __ b(ne, &done);
   __ ldr(r0, FieldMemOperand(r0, JSValue::kValueOffset));
 
   __ bind(&done);
   context()->Plug(r0);
 }
 
 
+void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  ASSERT(args->length() == 2);
+  ASSERT_NE(NULL, args->at(1)->AsLiteral());
+  Smi* index = Smi::cast(*(args->at(1)->AsLiteral()->handle()));

[rossberg, 2012/03/06 15:55:50]

Why did you change this? It requires more redundancy below.

[ulan, 2012/03/07 10:55:21]

In other platforms, index is pushed onto stack before calling to runtime. So I
thought it's better to keep it as Smi. In ARM it is Smi for consistency.

+
+  VisitForAccumulatorValue(args->at(0));  // Load the object.
+
+  Label runtime, done;
+  Register object = r0;
+  Register result = r0;
+  Register scratch0 = r9;
+  Register scratch1 = r1;
+
+#ifdef DEBUG
+  __ AbortIfSmi(r0);
+  __ CompareObjectType(r0, r1, r1, JS_DATE_TYPE);
+  __ Assert(eq, "Trying to get date field from non-date.");
+#endif
+
+  if (index->value() == 0) {
+    __ ldr(result, FieldMemOperand(object, JSDate::kValueOffset));
+  } else {
+    if (index->value() < JSDate::kFirstUncachedField) {
+      ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
+      __ mov(scratch1, Operand(stamp));
+      __ ldr(scratch1, MemOperand(scratch1));
+      __ ldr(scratch0, FieldMemOperand(object, JSDate::kCacheStampOffset));
+      __ cmp(scratch1, scratch0);
+      __ b(ne, &runtime);
+      __ ldr(result, FieldMemOperand(object, JSDate::kValueOffset +
+                                             kPointerSize * index->value()));
+      __ jmp(&done);
+    }
+    __ bind(&runtime);
+    __ PrepareCallCFunction(2, scratch1);
+    __ mov(r1, Operand(index));
+    __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2);
+    __ bind(&done);
+  }
+  context()->Plug(r0);
+}
+
+
 void FullCodeGenerator::EmitMathPow(CallRuntime* expr) {
   // Load the arguments on the stack and call the runtime function.
   ZoneList<Expression*>* args = expr->arguments();
   ASSERT(args->length() == 2);
   VisitForStackValue(args->at(0));
   VisitForStackValue(args->at(1));
   if (CpuFeatures::IsSupported(VFP3)) {
     MathPowStub stub(MathPowStub::ON_STACK);
     __ CallStub(&stub);
   } else {
@@ skipping 1445 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM