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comparison: mozglue/build/arm.h
mozglue/build/arm.h
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
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| -1:000000000000 | 0:32e694b876bc |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 /* compile-time and runtime tests for whether to use SSE instructions */ | |
| 6 | |
| 7 #ifndef mozilla_arm_h_ | |
| 8 #define mozilla_arm_h_ | |
| 9 | |
| 10 // for definition of MFBT_DATA | |
| 11 #include "mozilla/Types.h" | |
| 12 | |
| 13 /* This is patterned after SSE.h, but provides ARMv5E, ARMv6, and NEON | |
| 14 detection. For reasons similar to the SSE code, code using NEON (even just | |
| 15 in inline asm) needs to be in a separate compilation unit from the regular | |
| 16 code, because it requires an ".fpu neon" directive which can't be undone. | |
| 17 ARMv5E and ARMv6 code may also require an .arch directive, since by default | |
| 18 the assembler refuses to generate code for opcodes outside of its current | |
| 19 .arch setting. | |
| 20 | |
| 21 TODO: Add Thumb, Thumb2, VFP, iwMMX, etc. detection, if we need it. */ | |
| 22 | |
| 23 #if defined(__GNUC__) && defined(__arm__) | |
| 24 | |
| 25 # define MOZILLA_ARM_ARCH 3 | |
| 26 | |
| 27 # if defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__) \ | |
| 28 || defined(_ARM_ARCH_4) | |
| 29 # undef MOZILLA_ARM_ARCH | |
| 30 # define MOZILLA_ARM_ARCH 4 | |
| 31 # endif | |
| 32 | |
| 33 # if defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) \ | |
| 34 || defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) \ | |
| 35 || defined(__ARM_ARCH_5TEJ__) || defined(_ARM_ARCH_5) | |
| 36 # undef MOZILLA_ARM_ARCH | |
| 37 # define MOZILLA_ARM_ARCH 5 | |
| 38 # endif | |
| 39 | |
| 40 # if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \ | |
| 41 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) \ | |
| 42 || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) \ | |
| 43 || defined(__ARM_ARCH_6M__) || defined(_ARM_ARCH_6) | |
| 44 # undef MOZILLA_ARM_ARCH | |
| 45 # define MOZILLA_ARM_ARCH 6 | |
| 46 # endif | |
| 47 | |
| 48 # if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \ | |
| 49 || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \ | |
| 50 || defined(__ARM_ARCH_7EM__) || defined(_ARM_ARCH_7) | |
| 51 # undef MOZILLA_ARM_ARCH | |
| 52 # define MOZILLA_ARM_ARCH 7 | |
| 53 # endif | |
| 54 | |
| 55 | |
| 56 # ifdef __GNUC__ | |
| 57 # define MOZILLA_MAY_SUPPORT_EDSP 1 | |
| 58 | |
| 59 # if defined(HAVE_ARM_SIMD) | |
| 60 # define MOZILLA_MAY_SUPPORT_ARMV6 1 | |
| 61 # endif | |
| 62 | |
| 63 # if defined(HAVE_ARM_NEON) | |
| 64 # define MOZILLA_MAY_SUPPORT_NEON 1 | |
| 65 # endif | |
| 66 | |
| 67 # if defined(HAVE_ARM_SIMD) | |
| 68 # define MOZILLA_MAY_SUPPORT_ARMV7 1 | |
| 69 # endif | |
| 70 # endif | |
| 71 | |
| 72 // When using -mfpu=neon, gcc generates neon instructions. | |
| 73 | |
| 74 # if defined(__ARM_NEON__) | |
| 75 # define MOZILLA_PRESUME_NEON 1 | |
| 76 # endif | |
| 77 | |
| 78 // Currently we only have CPU detection for Linux via /proc/cpuinfo | |
| 79 # if defined(__linux__) || defined(ANDROID) | |
| 80 # define MOZILLA_ARM_HAVE_CPUID_DETECTION 1 | |
| 81 # endif | |
| 82 | |
| 83 #elif defined(_MSC_VER) && defined(_M_ARM) | |
| 84 | |
| 85 # define MOZILLA_ARM_HAVE_CPUID_DETECTION 1 | |
| 86 // _M_ARM on MSVC has current cpu architecture. | |
| 87 # define MOZILLA_ARM_ARCH _M_ARM | |
| 88 | |
| 89 // MSVC only allows external asm for ARM, so we don't have to rely on | |
| 90 // compiler support. | |
| 91 # define MOZILLA_MAY_SUPPORT_EDSP 1 | |
| 92 # if defined(HAVE_ARM_SIMD) | |
| 93 # define MOZILLA_MAY_SUPPORT_ARMV6 1 | |
| 94 # define MOZILLA_MAY_SUPPORT_ARMV7 1 | |
| 95 # endif | |
| 96 # if defined(HAVE_ARM_NEON) | |
| 97 # define MOZILLA_MAY_SUPPORT_NEON 1 | |
| 98 # endif | |
| 99 | |
| 100 #endif | |
| 101 | |
| 102 namespace mozilla { | |
| 103 | |
| 104 namespace arm_private { | |
| 105 #if defined(MOZILLA_ARM_HAVE_CPUID_DETECTION) | |
| 106 #if !defined(MOZILLA_PRESUME_EDSP) | |
| 107 extern bool MFBT_DATA edsp_enabled; | |
| 108 #endif | |
| 109 #if !defined(MOZILLA_PRESUME_ARMV6) | |
| 110 extern bool MFBT_DATA armv6_enabled; | |
| 111 #endif | |
| 112 #if !defined(MOZILLA_PRESUME_ARMV7) | |
| 113 extern bool MFBT_DATA armv7_enabled; | |
| 114 #endif | |
| 115 #if !defined(MOZILLA_PRESUME_NEON) | |
| 116 extern bool MFBT_DATA neon_enabled; | |
| 117 #endif | |
| 118 #endif | |
| 119 } | |
| 120 | |
| 121 #if defined(MOZILLA_PRESUME_EDSP) | |
| 122 # define MOZILLA_MAY_SUPPORT_EDSP 1 | |
| 123 inline bool supports_edsp() { return true; } | |
| 124 #elif defined(MOZILLA_MAY_SUPPORT_EDSP) \ | |
| 125 && defined(MOZILLA_ARM_HAVE_CPUID_DETECTION) | |
| 126 inline bool supports_edsp() { return arm_private::edsp_enabled; } | |
| 127 #else | |
| 128 inline bool supports_edsp() { return false; } | |
| 129 #endif | |
| 130 | |
| 131 #if defined(MOZILLA_PRESUME_ARMV6) | |
| 132 # define MOZILLA_MAY_SUPPORT_ARMV6 1 | |
| 133 inline bool supports_armv6() { return true; } | |
| 134 #elif defined(MOZILLA_MAY_SUPPORT_ARMV6) \ | |
| 135 && defined(MOZILLA_ARM_HAVE_CPUID_DETECTION) | |
| 136 inline bool supports_armv6() { return arm_private::armv6_enabled; } | |
| 137 #else | |
| 138 inline bool supports_armv6() { return false; } | |
| 139 #endif | |
| 140 | |
| 141 #if defined(MOZILLA_PRESUME_ARMV7) | |
| 142 # define MOZILLA_MAY_SUPPORT_ARMV7 1 | |
| 143 inline bool supports_armv7() { return true; } | |
| 144 #elif defined(MOZILLA_MAY_SUPPORT_ARMV7) \ | |
| 145 && defined(MOZILLA_ARM_HAVE_CPUID_DETECTION) | |
| 146 inline bool supports_armv7() { return arm_private::armv7_enabled; } | |
| 147 #else | |
| 148 inline bool supports_armv7() { return false; } | |
| 149 #endif | |
| 150 | |
| 151 #if defined(MOZILLA_PRESUME_NEON) | |
| 152 # define MOZILLA_MAY_SUPPORT_NEON 1 | |
| 153 inline bool supports_neon() { return true; } | |
| 154 #elif defined(MOZILLA_MAY_SUPPORT_NEON) \ | |
| 155 && defined(MOZILLA_ARM_HAVE_CPUID_DETECTION) | |
| 156 inline bool supports_neon() { return arm_private::neon_enabled; } | |
| 157 #else | |
| 158 inline bool supports_neon() { return false; } | |
| 159 #endif | |
| 160 | |
| 161 } | |
| 162 | |
| 163 #endif /* !defined(mozilla_arm_h_) */ |
