Change Math.random() to return 32 bits of random goodness, instead of 30 rand...

src/arm/codegen-arm.cc

Index: src/arm/codegen-arm.cc
===================================================================
--- src/arm/codegen-arm.cc	(revision 4353)
+++ src/arm/codegen-arm.cc	(working copy)
@@ -3624,10 +3624,24 @@
 }
 
 
-void CodeGenerator::GenerateRandomPositiveSmi(ZoneList<Expression*>* args) {
+void CodeGenerator::GenerateRandomHeapNumber(
+    ZoneList<Expression*>* args) {
   VirtualFrame::SpilledScope spilled_scope;
   ASSERT(args->length() == 0);
-  __ Call(ExternalReference::random_positive_smi_function().address(),
+
+  Label slow_allocate_heapnumber;
+  Label heapnumber_allocated;
+
+  __ AllocateHeapNumber(r0, r1, r2, &slow_allocate_heapnumber);
+  __ jmp(&heapnumber_allocated);
+
+  __ bind(&slow_allocate_heapnumber);
+  __ mov(r0, Operand(Smi::FromInt(0)));
+  __ push(r0);
+  __ CallRuntime(Runtime::kNumberUnaryMinus, 1);
+
+  __ bind(&heapnumber_allocated);
+  __ Call(ExternalReference::fill_heap_number_with_random_function().address(),
           RelocInfo::RUNTIME_ENTRY);
   frame_->EmitPush(r0);
 }