zra@google.com
7c91e88e6e
When we detect ARMv6, instead of using movw and movt, this change loads each individual byte. Although this is not the best way to achieve this, a modification to store large constants in the object pool would be more invasive. Further, this change will be easier to back-out once ARMv6 is obsolete. R=regis@google.com Review URL: https://codereview.chromium.org//183803024 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@33442 260f80e4-7a28-3924-810f-c04153c831b5
76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef VM_CPUINFO_H_
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#define VM_CPUINFO_H_
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#include "platform/assert.h"
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#include "vm/allocation.h"
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namespace dart {
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// Indices into cpuinfo field name arrays.
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enum CpuInfoIndices {
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kCpuInfoProcessor = 0,
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kCpuInfoModel = 1,
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kCpuInfoHardware = 2,
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kCpuInfoFeatures = 3,
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kCpuInfoMax = 4,
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};
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// For Intel architectures, the method to use to get CPU information.
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enum CpuInfoMethod {
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// Use the cpuid instruction.
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kCpuInfoCpuId,
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// Use system calls.
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kCpuInfoSystem,
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// Use whatever the default is for a particular OS:
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// Linux, Windows -> CpuId,
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// Android, MacOS -> System.
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kCpuInfoDefault,
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};
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class CpuInfo : public AllStatic {
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public:
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static void InitOnce();
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static void Cleanup();
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static const char* FieldName(CpuInfoIndices idx) {
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ASSERT((idx >= 0) && (idx < kCpuInfoMax));
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return fields_[idx];
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}
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// Returns true if the cpuinfo field contains the string.
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static bool FieldContains(CpuInfoIndices idx, const char* search_string);
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static bool FieldContainsByString(
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const char* field, const char* search_string);
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// Returns true if the cpuinfo field [field] exists and is non-empty.
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static bool HasField(const char* field);
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// Returns the field. Caller is responsible for freeing the result.
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static const char* ExtractField(CpuInfoIndices idx);
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static const char* ExtractFieldByString(const char* field);
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// Returns the field describing the CPU model. Caller is responsible for
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// freeing the result.
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static const char* GetCpuModel() {
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ASSERT(HasField(FieldName(kCpuInfoHardware)));
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return ExtractField(kCpuInfoHardware);
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}
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private:
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// The method to use to acquire info about the CPU.
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static CpuInfoMethod method_;
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// Cpuinfo field names.
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static const char* fields_[kCpuInfoMax];
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};
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} // namespace dart
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#endif // VM_CPUINFO_H_
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