1 // Copyright 2014 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 #ifndef V8_BASE_BUILD_CONFIG_H_ 6 #define V8_BASE_BUILD_CONFIG_H_ 7 8 #include "include/v8config.h" 9 10 // Processor architecture detection. For more info on what's defined, see: 11 // http://msdn.microsoft.com/en-us/library/b0084kay.aspx 12 // http://www.agner.org/optimize/calling_conventions.pdf 13 // or with gcc, run: "echo | gcc -E -dM -" 14 #if defined(_M_X64) || defined(__x86_64__) 15 #if defined(__native_client__) 16 // For Native Client builds of V8, use V8_TARGET_ARCH_ARM, so that V8 17 // generates ARM machine code, together with a portable ARM simulator 18 // compiled for the host architecture in question. 19 // 20 // Since Native Client is ILP-32 on all architectures we use 21 // V8_HOST_ARCH_IA32 on both 32- and 64-bit x86. 22 #define V8_HOST_ARCH_IA32 1 23 #define V8_HOST_ARCH_32_BIT 1 24 #else 25 #define V8_HOST_ARCH_X64 1 26 #if defined(__x86_64__) && __SIZEOF_POINTER__ == 4 // Check for x32. 27 #define V8_HOST_ARCH_32_BIT 1 28 #else 29 #define V8_HOST_ARCH_64_BIT 1 30 #endif 31 #endif // __native_client__ 32 #elif defined(_M_IX86) || defined(__i386__) 33 #define V8_HOST_ARCH_IA32 1 34 #define V8_HOST_ARCH_32_BIT 1 35 #elif defined(__AARCH64EL__) 36 #define V8_HOST_ARCH_ARM64 1 37 #define V8_HOST_ARCH_64_BIT 1 38 #elif defined(__ARMEL__) 39 #define V8_HOST_ARCH_ARM 1 40 #define V8_HOST_ARCH_32_BIT 1 41 #elif defined(__mips64) 42 #define V8_HOST_ARCH_MIPS64 1 43 #define V8_HOST_ARCH_64_BIT 1 44 #elif defined(__MIPSEB__) || defined(__MIPSEL__) 45 #define V8_HOST_ARCH_MIPS 1 46 #define V8_HOST_ARCH_32_BIT 1 47 #else 48 #error "Host architecture was not detected as supported by v8" 49 #endif 50 51 #if defined(__ARM_ARCH_7A__) || \ 52 defined(__ARM_ARCH_7R__) || \ 53 defined(__ARM_ARCH_7__) 54 # define CAN_USE_ARMV7_INSTRUCTIONS 1 55 # ifndef CAN_USE_VFP3_INSTRUCTIONS 56 # define CAN_USE_VFP3_INSTRUCTIONS 57 # endif 58 #endif 59 60 61 // Target architecture detection. This may be set externally. If not, detect 62 // in the same way as the host architecture, that is, target the native 63 // environment as presented by the compiler. 64 #if !V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_IA32 && !V8_TARGET_ARCH_X87 && \ 65 !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_ARM64 && !V8_TARGET_ARCH_MIPS && \ 66 !V8_TARGET_ARCH_MIPS64 67 #if defined(_M_X64) || defined(__x86_64__) 68 #define V8_TARGET_ARCH_X64 1 69 #elif defined(_M_IX86) || defined(__i386__) 70 #define V8_TARGET_ARCH_IA32 1 71 #elif defined(__AARCH64EL__) 72 #define V8_TARGET_ARCH_ARM64 1 73 #elif defined(__ARMEL__) 74 #define V8_TARGET_ARCH_ARM 1 75 #elif defined(__mips64) 76 #define V8_TARGET_ARCH_MIPS64 1 77 #elif defined(__MIPSEB__) || defined(__MIPSEL__) 78 #define V8_TARGET_ARCH_MIPS 1 79 #else 80 #error Target architecture was not detected as supported by v8 81 #endif 82 #endif 83 84 // Determine architecture pointer size. 85 #if V8_TARGET_ARCH_IA32 86 #define V8_TARGET_ARCH_32_BIT 1 87 #elif V8_TARGET_ARCH_X64 88 #if !V8_TARGET_ARCH_32_BIT && !V8_TARGET_ARCH_64_BIT 89 #if defined(__x86_64__) && __SIZEOF_POINTER__ == 4 // Check for x32. 90 #define V8_TARGET_ARCH_32_BIT 1 91 #else 92 #define V8_TARGET_ARCH_64_BIT 1 93 #endif 94 #endif 95 #elif V8_TARGET_ARCH_ARM 96 #define V8_TARGET_ARCH_32_BIT 1 97 #elif V8_TARGET_ARCH_ARM64 98 #define V8_TARGET_ARCH_64_BIT 1 99 #elif V8_TARGET_ARCH_MIPS 100 #define V8_TARGET_ARCH_32_BIT 1 101 #elif V8_TARGET_ARCH_MIPS64 102 #define V8_TARGET_ARCH_64_BIT 1 103 #elif V8_TARGET_ARCH_X87 104 #define V8_TARGET_ARCH_32_BIT 1 105 #else 106 #error Unknown target architecture pointer size 107 #endif 108 109 // Check for supported combinations of host and target architectures. 110 #if V8_TARGET_ARCH_IA32 && !V8_HOST_ARCH_IA32 111 #error Target architecture ia32 is only supported on ia32 host 112 #endif 113 #if (V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_64_BIT && \ 114 !(V8_HOST_ARCH_X64 && V8_HOST_ARCH_64_BIT)) 115 #error Target architecture x64 is only supported on x64 host 116 #endif 117 #if (V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_32_BIT && \ 118 !(V8_HOST_ARCH_X64 && V8_HOST_ARCH_32_BIT)) 119 #error Target architecture x32 is only supported on x64 host with x32 support 120 #endif 121 #if (V8_TARGET_ARCH_ARM && !(V8_HOST_ARCH_IA32 || V8_HOST_ARCH_ARM)) 122 #error Target architecture arm is only supported on arm and ia32 host 123 #endif 124 #if (V8_TARGET_ARCH_ARM64 && !(V8_HOST_ARCH_X64 || V8_HOST_ARCH_ARM64)) 125 #error Target architecture arm64 is only supported on arm64 and x64 host 126 #endif 127 #if (V8_TARGET_ARCH_MIPS && !(V8_HOST_ARCH_IA32 || V8_HOST_ARCH_MIPS)) 128 #error Target architecture mips is only supported on mips and ia32 host 129 #endif 130 #if (V8_TARGET_ARCH_MIPS64 && !(V8_HOST_ARCH_X64 || V8_HOST_ARCH_MIPS64)) 131 #error Target architecture mips64 is only supported on mips64 and x64 host 132 #endif 133 134 // Determine architecture endianness. 135 #if V8_TARGET_ARCH_IA32 136 #define V8_TARGET_LITTLE_ENDIAN 1 137 #elif V8_TARGET_ARCH_X64 138 #define V8_TARGET_LITTLE_ENDIAN 1 139 #elif V8_TARGET_ARCH_ARM 140 #define V8_TARGET_LITTLE_ENDIAN 1 141 #elif V8_TARGET_ARCH_ARM64 142 #define V8_TARGET_LITTLE_ENDIAN 1 143 #elif V8_TARGET_ARCH_MIPS 144 #if defined(__MIPSEB__) 145 #define V8_TARGET_BIG_ENDIAN 1 146 #else 147 #define V8_TARGET_LITTLE_ENDIAN 1 148 #endif 149 #elif V8_TARGET_ARCH_MIPS64 150 #define V8_TARGET_LITTLE_ENDIAN 1 151 #elif V8_TARGET_ARCH_X87 152 #define V8_TARGET_LITTLE_ENDIAN 1 153 #else 154 #error Unknown target architecture endianness 155 #endif 156 157 // Number of bits to represent the page size for paged spaces. The value of 20 158 // gives 1Mb bytes per page. 159 const int kPageSizeBits = 20; 160 161 #endif // V8_BASE_BUILD_CONFIG_H_ 162
