1 // Copyright 2006-2013 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 // This module contains the architecture-specific code. This make the rest of 29 // the code less dependent on differences between different processor 30 // architecture. 31 // The classes have the same definition for all architectures. The 32 // implementation for a particular architecture is put in cpu_<arch>.cc. 33 // The build system then uses the implementation for the target architecture. 34 // 35 36 #ifndef V8_CPU_H_ 37 #define V8_CPU_H_ 38 39 #include "allocation.h" 40 41 namespace v8 { 42 namespace internal { 43 44 // ---------------------------------------------------------------------------- 45 // CPU 46 // 47 // Query information about the processor. 48 // 49 // This class also has static methods for the architecture specific functions. 50 // Add methods here to cope with differences between the supported 51 // architectures. For each architecture the file cpu_<arch>.cc contains the 52 // implementation of these static functions. 53 54 class CPU V8_FINAL BASE_EMBEDDED { 55 public: 56 CPU(); 57 58 // x86 CPUID information 59 const char* vendor() const { return vendor_; } 60 int stepping() const { return stepping_; } 61 int model() const { return model_; } 62 int ext_model() const { return ext_model_; } 63 int family() const { return family_; } 64 int ext_family() const { return ext_family_; } 65 int type() const { return type_; } 66 67 // arm implementer/part information 68 int implementer() const { return implementer_; } 69 static const int ARM = 0x41; 70 static const int QUALCOMM = 0x51; 71 int architecture() const { return architecture_; } 72 int part() const { return part_; } 73 static const int ARM_CORTEX_A5 = 0xc05; 74 static const int ARM_CORTEX_A7 = 0xc07; 75 static const int ARM_CORTEX_A8 = 0xc08; 76 static const int ARM_CORTEX_A9 = 0xc09; 77 static const int ARM_CORTEX_A12 = 0xc0c; 78 static const int ARM_CORTEX_A15 = 0xc0f; 79 80 // General features 81 bool has_fpu() const { return has_fpu_; } 82 83 // x86 features 84 bool has_cmov() const { return has_cmov_; } 85 bool has_sahf() const { return has_sahf_; } 86 bool has_mmx() const { return has_mmx_; } 87 bool has_sse() const { return has_sse_; } 88 bool has_sse2() const { return has_sse2_; } 89 bool has_sse3() const { return has_sse3_; } 90 bool has_ssse3() const { return has_ssse3_; } 91 bool has_sse41() const { return has_sse41_; } 92 bool has_sse42() const { return has_sse42_; } 93 94 // arm features 95 bool has_idiva() const { return has_idiva_; } 96 bool has_neon() const { return has_neon_; } 97 bool has_thumbee() const { return has_thumbee_; } 98 bool has_vfp() const { return has_vfp_; } 99 bool has_vfp3() const { return has_vfp3_; } 100 bool has_vfp3_d32() const { return has_vfp3_d32_; } 101 102 // Returns the number of processors online. 103 static int NumberOfProcessorsOnline(); 104 105 // Initializes the cpu architecture support. Called once at VM startup. 106 static void SetUp(); 107 108 static bool SupportsCrankshaft(); 109 110 // Flush instruction cache. 111 static void FlushICache(void* start, size_t size); 112 113 private: 114 char vendor_[13]; 115 int stepping_; 116 int model_; 117 int ext_model_; 118 int family_; 119 int ext_family_; 120 int type_; 121 int implementer_; 122 int architecture_; 123 int part_; 124 bool has_fpu_; 125 bool has_cmov_; 126 bool has_sahf_; 127 bool has_mmx_; 128 bool has_sse_; 129 bool has_sse2_; 130 bool has_sse3_; 131 bool has_ssse3_; 132 bool has_sse41_; 133 bool has_sse42_; 134 bool has_idiva_; 135 bool has_neon_; 136 bool has_thumbee_; 137 bool has_vfp_; 138 bool has_vfp3_; 139 bool has_vfp3_d32_; 140 }; 141 142 } } // namespace v8::internal 143 144 #endif // V8_CPU_H_ 145
