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20f3e2b2c2
Review URL: https://codereview.chromium.org//182943002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@33112 260f80e4-7a28-3924-810f-c04153c831b5
118 lines
3.1 KiB
C++
118 lines
3.1 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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#include "vm/globals.h"
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#if !defined(TARGET_OS_MACOS)
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#include "vm/cpuid.h"
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#if defined(HOST_ARCH_IA32) || defined(HOST_ARCH_X64)
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// GetCpuId() on Windows, __get_cpuid() on Linux
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#if defined(TARGET_OS_WINDOWS)
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#include <intrin.h> // NOLINT
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#else
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#include <cpuid.h> // NOLINT
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#endif
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#endif
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namespace dart {
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bool CpuId::sse2_ = false;
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bool CpuId::sse41_ = false;
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const char* CpuId::id_string_ = NULL;
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const char* CpuId::brand_string_ = NULL;
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#if defined(HOST_ARCH_IA32) || defined(HOST_ARCH_X64)
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void CpuId::GetCpuId(int32_t level, uint32_t info[4]) {
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#if defined(TARGET_OS_WINDOWS)
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// The documentation for __cpuid is at:
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// http://msdn.microsoft.com/en-us/library/hskdteyh(v=vs.90).aspx
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__cpuid(reinterpret_cast<int*>(info), level);
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#else
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__get_cpuid(level, &info[0], &info[1], &info[2], &info[3]);
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#endif
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}
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void CpuId::InitOnce() {
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uint32_t info[4] = {static_cast<uint32_t>(-1)};
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GetCpuId(0, info);
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char* id_string = reinterpret_cast<char*>(malloc(3 * sizeof(int32_t)));
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// Yes, these are supposed to be out of order.
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*reinterpret_cast<uint32_t*>(id_string) = info[1];
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*reinterpret_cast<uint32_t*>(id_string + 4) = info[3];
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*reinterpret_cast<uint32_t*>(id_string + 8) = info[2];
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CpuId::id_string_ = id_string;
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GetCpuId(1, info);
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CpuId::sse41_ = (info[2] & (1 << 19)) != 0;
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CpuId::sse2_ = (info[3] & (1 << 26)) != 0;
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char* brand_string =
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reinterpret_cast<char*>(malloc(3 * 4 * sizeof(uint32_t)));
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for (uint32_t i = 0x80000002; i <= 0x80000004; i++) {
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uint32_t off = (i - 0x80000002U) * 4 * sizeof(uint32_t);
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GetCpuId(i, info);
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*reinterpret_cast<int32_t*>(brand_string + off) = info[0];
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*reinterpret_cast<int32_t*>(brand_string + off + 4) = info[1];
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*reinterpret_cast<int32_t*>(brand_string + off + 8) = info[2];
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*reinterpret_cast<int32_t*>(brand_string + off + 12) = info[3];
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}
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CpuId::brand_string_ = brand_string;
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}
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void CpuId::Cleanup() {
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ASSERT(id_string_ != NULL);
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free(const_cast<char*>(id_string_));
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id_string_ = NULL;
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ASSERT(brand_string_ != NULL);
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free(const_cast<char*>(brand_string_));
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brand_string_ = NULL;
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}
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const char* CpuId::id_string() {
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return strdup(id_string_);
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}
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const char* CpuId::brand_string() {
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return strdup(brand_string_);
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}
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const char* CpuId::field(CpuInfoIndices idx) {
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switch (idx) {
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case kCpuInfoProcessor:
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return id_string();
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case kCpuInfoModel:
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return brand_string();
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case kCpuInfoHardware:
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return brand_string();
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case kCpuInfoFeatures: {
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if (sse2() && sse41()) {
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return strdup("sse2 sse4.1");
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} else if (sse2()) {
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return strdup("sse2");
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} else if (sse41()) {
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return strdup("sse4.1");
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} else {
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return strdup("");
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}
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}
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default: {
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UNREACHABLE();
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return NULL;
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}
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}
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}
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#endif // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64)
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} // namespace dart
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#endif // !defined(TARGET_OS_MACOS)
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