Refactors CPU feature detection.

runtime/vm/cpu_mips.cc

Index: runtime/vm/cpu_mips.cc
===================================================================
--- runtime/vm/cpu_mips.cc	(revision 31402)
+++ runtime/vm/cpu_mips.cc	(working copy)
@@ -6,14 +6,16 @@
 
 #if defined(TARGET_ARCH_MIPS)
 
+#include "vm/cpu.h"
+#include "vm/cpuinfo.h"
+#include "vm/simulator.h"
+
 #if defined(HOST_ARCH_MIPS)
 #include <asm/cachectl.h> /* NOLINT */
 #include <sys/syscall.h>  /* NOLINT */
 #include <unistd.h>  /* NOLINT */
 #endif
 
-#include "vm/cpu.h"
-
 namespace dart {
 
 void CPU::FlushICache(uword start, uword size) {
@@ -37,6 +39,31 @@
   "mips";
 }
 
+
+char CPUFeatures::hardware_[HARDWARE_LEN] = {0};
+#if defined(DEBUG)
+bool CPUFeatures::initialized_ = false;
+#endif
+
+
+char* CPUFeatures::hardware() {
+  DEBUG_ASSERT(initialized_);
+  return hardware_;
+}
+
+
+void CPUFeatures::InitOnce() {
+  CpuInfo::Read();
+  CpuInfo::GetCpuModel(hardware_, HARDWARE_LEN);
+#if !defined(USING_SIMULATOR)
+  // Has a floating point unit.
+  ASSERT(CpuInfo::FieldContains("cpu model", "FPU"));
+#endif  // defined(USING_SIMULATOR)
+#if defined(DEBUG)
+  initialized_ = true;
+#endif
+}
+
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS