Updates refactoring of CPU feature detection

runtime/vm/cpuinfo_win.cc

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "vm/globals.h"
+#if defined(TARGET_OS_WINDOWS)
+
+#include "vm/cpuinfo.h"
+#include "vm/cpuid.h"
+
+// __cpuid()
+#include <intrin.h>  // NOLINT
+#include <string.h>  // NOLINT
+
+#include "platform/assert.h"
+
+namespace dart {
+
+CpuInfoMethod CpuInfo::method_ = kCpuInfoSystem;
+const char* CpuInfo::fields_[kCpuInfoMax] = {0};
+
+void CpuInfo::InitOnce(CpuInfoMethod method) {
+  // On Windows, only the CpuId method is supported.
+  ASSERT((method == kCpuInfoDefault) || (method == kCpuInfoCpuId));
+  method_ = kCpuInfoCpuId;
+
+  // Initialize the CpuId information.
+  CpuId::InitOnce();
+
+  fields_[kCpuInfoProcessor] = "Processor";
+  fields_[kCpuInfoModel] = "Hardware";
+  fields_[kCpuInfoHardware] = "Hardware";
+  fields_[kCpuInfoFeatures] = "Features";
+}
+
+
+bool CpuInfo::FieldContains(CpuInfoIndices idx, const char* search_string) {
+  return strstr(CpuId::field(idx), search_string);
+}
+
+
+bool CpuInfo::FieldContainsByString(const char* field,
+                                    const char* search_string) {
+  for (int i = 0; i < kCpuInfoMax; i++) {
+    if (strcmp(field, fields_[i]) == 0) {
+      return FieldContains(static_cast<CpuInfoIndices>(i), search_string);
+    }
+  }
+  UNIMPLEMENTED();
+  return false;
+}
+
+
+const char* CpuInfo::ExtractField(CpuInfoIndices idx) {
+  return CpuId::field(idx);
+}
+
+
+const char* CpuInfo::ExtractFieldByString(const char* field) {
+  for (int i = 0; i < kCpuInfoMax; i++) {
+    if (strcmp(field, fields_[i]) == 0) {
+      return ExtractField(static_cast<CpuInfoIndices>(i));
+    }
+  }
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
+bool CpuInfo::HasField(const char* field) {
+  return (strcmp(field, fields_[kCpuInfoProcessor]) == 0) ||
+         (strcmp(field, fields_[kCpuInfoModel]) == 0) ||
+         (strcmp(field, fields_[kCpuInfoHardware]) == 0) ||
+         (strcmp(field, fields_[kCpuInfoFeatures]) == 0);
+}
+
+}  // namespace dart
+
+#endif  // defined(TARGET_OS_WINDOWS)