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| 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 #define V8_HOST_CAN_READ_UNALIGNED 1 |
| 25 #else |
| 26 #define V8_HOST_ARCH_X64 1 |
| 27 #define V8_HOST_ARCH_64_BIT 1 |
| 28 #define V8_HOST_CAN_READ_UNALIGNED 1 |
| 29 #endif // __native_client__ |
| 30 #elif defined(_M_IX86) || defined(__i386__) |
| 31 #define V8_HOST_ARCH_IA32 1 |
| 32 #define V8_HOST_ARCH_32_BIT 1 |
| 33 #define V8_HOST_CAN_READ_UNALIGNED 1 |
| 34 #elif defined(__AARCH64EL__) |
| 35 #define V8_HOST_ARCH_ARM64 1 |
| 36 #define V8_HOST_ARCH_64_BIT 1 |
| 37 #define V8_HOST_CAN_READ_UNALIGNED 1 |
| 38 #elif defined(__ARMEL__) |
| 39 #define V8_HOST_ARCH_ARM 1 |
| 40 #define V8_HOST_ARCH_32_BIT 1 |
| 41 #elif defined(__MIPSEB__) || defined(__MIPSEL__) |
| 42 #define V8_HOST_ARCH_MIPS 1 |
| 43 #define V8_HOST_ARCH_32_BIT 1 |
| 44 #else |
| 45 #error "Host architecture was not detected as supported by v8" |
| 46 #endif |
| 47 |
| 48 #if defined(__ARM_ARCH_7A__) || \ |
| 49 defined(__ARM_ARCH_7R__) || \ |
| 50 defined(__ARM_ARCH_7__) |
| 51 # define CAN_USE_ARMV7_INSTRUCTIONS 1 |
| 52 # ifndef CAN_USE_VFP3_INSTRUCTIONS |
| 53 # define CAN_USE_VFP3_INSTRUCTIONS |
| 54 # endif |
| 55 #endif |
| 56 |
| 57 |
| 58 // Target architecture detection. This may be set externally. If not, detect |
| 59 // in the same way as the host architecture, that is, target the native |
| 60 // environment as presented by the compiler. |
| 61 #if !V8_TARGET_ARCH_X64 && !V8_TARGET_ARCH_IA32 && !V8_TARGET_ARCH_X87 &&\ |
| 62 !V8_TARGET_ARCH_ARM && !V8_TARGET_ARCH_ARM64 && !V8_TARGET_ARCH_MIPS |
| 63 #if defined(_M_X64) || defined(__x86_64__) |
| 64 #define V8_TARGET_ARCH_X64 1 |
| 65 #elif defined(_M_IX86) || defined(__i386__) |
| 66 #define V8_TARGET_ARCH_IA32 1 |
| 67 #elif defined(__AARCH64EL__) |
| 68 #define V8_TARGET_ARCH_ARM64 1 |
| 69 #elif defined(__ARMEL__) |
| 70 #define V8_TARGET_ARCH_ARM 1 |
| 71 #elif defined(__MIPSEB__) || defined(__MIPSEL__) |
| 72 #define V8_TARGET_ARCH_MIPS 1 |
| 73 #else |
| 74 #error Target architecture was not detected as supported by v8 |
| 75 #endif |
| 76 #endif |
| 77 |
| 78 // Check for supported combinations of host and target architectures. |
| 79 #if V8_TARGET_ARCH_IA32 && !V8_HOST_ARCH_IA32 |
| 80 #error Target architecture ia32 is only supported on ia32 host |
| 81 #endif |
| 82 #if V8_TARGET_ARCH_X64 && !V8_HOST_ARCH_X64 |
| 83 #error Target architecture x64 is only supported on x64 host |
| 84 #endif |
| 85 #if (V8_TARGET_ARCH_ARM && !(V8_HOST_ARCH_IA32 || V8_HOST_ARCH_ARM)) |
| 86 #error Target architecture arm is only supported on arm and ia32 host |
| 87 #endif |
| 88 #if (V8_TARGET_ARCH_ARM64 && !(V8_HOST_ARCH_X64 || V8_HOST_ARCH_ARM64)) |
| 89 #error Target architecture arm64 is only supported on arm64 and x64 host |
| 90 #endif |
| 91 #if (V8_TARGET_ARCH_MIPS && !(V8_HOST_ARCH_IA32 || V8_HOST_ARCH_MIPS)) |
| 92 #error Target architecture mips is only supported on mips and ia32 host |
| 93 #endif |
| 94 |
| 95 // Determine architecture endianness. |
| 96 #if V8_TARGET_ARCH_IA32 |
| 97 #define V8_TARGET_LITTLE_ENDIAN 1 |
| 98 #elif V8_TARGET_ARCH_X64 |
| 99 #define V8_TARGET_LITTLE_ENDIAN 1 |
| 100 #elif V8_TARGET_ARCH_ARM |
| 101 #define V8_TARGET_LITTLE_ENDIAN 1 |
| 102 #elif V8_TARGET_ARCH_ARM64 |
| 103 #define V8_TARGET_LITTLE_ENDIAN 1 |
| 104 #elif V8_TARGET_ARCH_MIPS |
| 105 #if defined(__MIPSEB__) |
| 106 #define V8_TARGET_BIG_ENDIAN 1 |
| 107 #else |
| 108 #define V8_TARGET_LITTLE_ENDIAN 1 |
| 109 #endif |
| 110 #elif V8_TARGET_ARCH_X87 |
| 111 #define V8_TARGET_LITTLE_ENDIAN 1 |
| 112 #else |
| 113 #error Unknown target architecture endianness |
| 114 #endif |
| 115 |
| 116 #if V8_OS_MACOSX || defined(__FreeBSD__) || defined(__OpenBSD__) |
| 117 #define USING_BSD_ABI |
| 118 #endif |
| 119 |
| 120 #endif // V8_BASE_BUILD_CONFIG_H_ |
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