V8 API Reference, 7.2.502.16 (for Deno 0.2.4)
cpu.h
1 // Copyright 2006-2013 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 // This module contains the architecture-specific code. This make the rest of
6 // the code less dependent on differences between different processor
7 // architecture.
8 // The classes have the same definition for all architectures. The
9 // implementation for a particular architecture is put in cpu_<arch>.cc.
10 // The build system then uses the implementation for the target architecture.
11 //
12 
13 #ifndef V8_BASE_CPU_H_
14 #define V8_BASE_CPU_H_
15 
16 #include "src/base/base-export.h"
17 #include "src/base/macros.h"
18 
19 namespace v8 {
20 namespace base {
21 
22 // ----------------------------------------------------------------------------
23 // CPU
24 //
25 // Query information about the processor.
26 //
27 // This class also has static methods for the architecture specific functions.
28 // Add methods here to cope with differences between the supported
29 // architectures. For each architecture the file cpu_<arch>.cc contains the
30 // implementation of these static functions.
31 
32 class V8_BASE_EXPORT CPU final {
33  public:
34  CPU();
35 
36  // x86 CPUID information
37  const char* vendor() const { return vendor_; }
38  int stepping() const { return stepping_; }
39  int model() const { return model_; }
40  int ext_model() const { return ext_model_; }
41  int family() const { return family_; }
42  int ext_family() const { return ext_family_; }
43  int type() const { return type_; }
44 
45  // arm implementer/part information
46  int implementer() const { return implementer_; }
47  static const int ARM = 0x41;
48  static const int NVIDIA = 0x4e;
49  static const int QUALCOMM = 0x51;
50  int architecture() const { return architecture_; }
51  int variant() const { return variant_; }
52  static const int NVIDIA_DENVER = 0x0;
53  int part() const { return part_; }
54 
55  // ARM-specific part codes
56  static const int ARM_CORTEX_A5 = 0xc05;
57  static const int ARM_CORTEX_A7 = 0xc07;
58  static const int ARM_CORTEX_A8 = 0xc08;
59  static const int ARM_CORTEX_A9 = 0xc09;
60  static const int ARM_CORTEX_A12 = 0xc0c;
61  static const int ARM_CORTEX_A15 = 0xc0f;
62 
63  // Denver-specific part code
64  static const int NVIDIA_DENVER_V10 = 0x002;
65 
66  // PPC-specific part codes
67  enum {
68  PPC_POWER5,
69  PPC_POWER6,
70  PPC_POWER7,
71  PPC_POWER8,
72  PPC_POWER9,
73  PPC_G4,
74  PPC_G5,
75  PPC_PA6T
76  };
77 
78  // General features
79  bool has_fpu() const { return has_fpu_; }
80  int icache_line_size() const { return icache_line_size_; }
81  int dcache_line_size() const { return dcache_line_size_; }
82  static const int UNKNOWN_CACHE_LINE_SIZE = 0;
83 
84  // x86 features
85  bool has_cmov() const { return has_cmov_; }
86  bool has_sahf() const { return has_sahf_; }
87  bool has_mmx() const { return has_mmx_; }
88  bool has_sse() const { return has_sse_; }
89  bool has_sse2() const { return has_sse2_; }
90  bool has_sse3() const { return has_sse3_; }
91  bool has_ssse3() const { return has_ssse3_; }
92  bool has_sse41() const { return has_sse41_; }
93  bool has_sse42() const { return has_sse42_; }
94  bool has_osxsave() const { return has_osxsave_; }
95  bool has_avx() const { return has_avx_; }
96  bool has_fma3() const { return has_fma3_; }
97  bool has_bmi1() const { return has_bmi1_; }
98  bool has_bmi2() const { return has_bmi2_; }
99  bool has_lzcnt() const { return has_lzcnt_; }
100  bool has_popcnt() const { return has_popcnt_; }
101  bool is_atom() const { return is_atom_; }
102  bool has_non_stop_time_stamp_counter() const {
103  return has_non_stop_time_stamp_counter_;
104  }
105 
106  // arm features
107  bool has_idiva() const { return has_idiva_; }
108  bool has_neon() const { return has_neon_; }
109  bool has_thumb2() const { return has_thumb2_; }
110  bool has_vfp() const { return has_vfp_; }
111  bool has_vfp3() const { return has_vfp3_; }
112  bool has_vfp3_d32() const { return has_vfp3_d32_; }
113 
114  // mips features
115  bool is_fp64_mode() const { return is_fp64_mode_; }
116  bool has_msa() const { return has_msa_; }
117 
118  private:
119  char vendor_[13];
120  int stepping_;
121  int model_;
122  int ext_model_;
123  int family_;
124  int ext_family_;
125  int type_;
126  int implementer_;
127  int architecture_;
128  int variant_;
129  int part_;
130  int icache_line_size_;
131  int dcache_line_size_;
132  bool has_fpu_;
133  bool has_cmov_;
134  bool has_sahf_;
135  bool has_mmx_;
136  bool has_sse_;
137  bool has_sse2_;
138  bool has_sse3_;
139  bool has_ssse3_;
140  bool has_sse41_;
141  bool has_sse42_;
142  bool is_atom_;
143  bool has_osxsave_;
144  bool has_avx_;
145  bool has_fma3_;
146  bool has_bmi1_;
147  bool has_bmi2_;
148  bool has_lzcnt_;
149  bool has_popcnt_;
150  bool has_idiva_;
151  bool has_neon_;
152  bool has_thumb2_;
153  bool has_vfp_;
154  bool has_vfp3_;
155  bool has_vfp3_d32_;
156  bool is_fp64_mode_;
157  bool has_non_stop_time_stamp_counter_;
158  bool has_msa_;
159 };
160 
161 } // namespace base
162 } // namespace v8
163 
164 #endif // V8_BASE_CPU_H_
v8
Definition: libplatform.h:13