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processor_arm.cpp
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processor_arm.cpp
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// This file is a part of Julia. License is MIT: https://julialang.org/license
// ARM (AArch32/AArch64) specific processor detection and dispatch
#include <sys/stat.h>
#include <sys/utsname.h>
#include <fcntl.h>
#include <set>
#include <sstream>
#include <fstream>
#include <algorithm>
#if defined(_CPU_AARCH64_) || __GLIBC_PREREQ(2, 16)
# include <sys/auxv.h>
#else
# define DYN_GETAUXVAL
#endif
namespace ARM {
enum class CPU : uint32_t {
generic = 0,
// Architecture targets
armv7_a,
armv7_m,
armv7e_m,
armv7_r,
armv8_a,
armv8_m_base,
armv8_m_main,
armv8_r,
armv8_1_a,
armv8_2_a,
armv8_3_a,
// armv8_4_a,
// ARM
// armv6l
arm_mpcore,
arm_1136jf_s,
arm_1156t2f_s,
arm_1176jzf_s,
arm_cortex_m0,
arm_cortex_m1,
// armv7ml
arm_cortex_m3,
arm_cortex_m4,
arm_cortex_m7,
// armv7l
arm_cortex_a5,
arm_cortex_a7,
arm_cortex_a8,
arm_cortex_a9,
arm_cortex_a12,
arm_cortex_a15,
arm_cortex_a17,
arm_cortex_r4,
arm_cortex_r5,
arm_cortex_r7,
arm_cortex_r8,
// armv8ml
arm_cortex_m23,
arm_cortex_m33,
// armv8l
arm_cortex_a32,
arm_cortex_r52,
// aarch64
arm_cortex_a35,
arm_cortex_a53,
arm_cortex_a55,
arm_cortex_a57,
arm_cortex_a72,
arm_cortex_a73,
arm_cortex_a75,
// Cavium
// aarch64
cavium_thunderx,
cavium_thunderx88,
cavium_thunderx88p1,
cavium_thunderx81,
cavium_thunderx83,
cavium_thunderx2t99,
cavium_thunderx2t99p1,
// NVIDIA
// aarch64
nvidia_denver1,
nvidia_denver2,
// AppliedMicro
// aarch64
apm_xgene1,
apm_xgene2,
apm_xgene3,
// Qualcomm
// armv7l
qualcomm_scorpion,
qualcomm_krait,
// aarch64
qualcomm_kyro,
qualcomm_falkor,
qualcomm_saphira,
// Samsung
// aarch64
samsung_exynos_m1,
samsung_exynos_m2,
samsung_exynos_m3,
// Apple
// armv7l
apple_swift,
// aarch64
apple_cyclone,
apple_typhoon,
apple_twister,
apple_hurricane,
// Marvell
// armv7l
marvell_pj4,
// Intel
// armv7l
intel_3735d,
};
#ifdef _CPU_AARCH64_
static constexpr size_t feature_sz = 3;
static constexpr FeatureName feature_names[] = {
#define JL_FEATURE_DEF(name, bit, llvmver) {#name, bit, llvmver},
#define JL_FEATURE_DEF_NAME(name, bit, llvmver, str) {str, bit, llvmver},
#include "features_aarch64.h"
#undef JL_FEATURE_DEF
#undef JL_FEATURE_DEF_NAME
};
static constexpr uint32_t nfeature_names = sizeof(feature_names) / sizeof(FeatureName);
template<typename... Args>
static inline constexpr FeatureList<feature_sz> get_feature_masks(Args... args)
{
return ::get_feature_masks<feature_sz>(args...);
}
#define JL_FEATURE_DEF_NAME(name, bit, llvmver, str) JL_FEATURE_DEF(name, bit, llvmver)
static constexpr auto feature_masks = get_feature_masks(
#define JL_FEATURE_DEF(name, bit, llvmver) bit,
#include "features_aarch64.h"
#undef JL_FEATURE_DEF
-1);
static const auto real_feature_masks =
feature_masks & FeatureList<feature_sz>{{(uint32_t)-1, (uint32_t)-1, 0}};
namespace Feature {
enum : uint32_t {
#define JL_FEATURE_DEF(name, bit, llvmver) name = bit,
#include "features_aarch64.h"
#undef JL_FEATURE_DEF
};
#undef JL_FEATURE_DEF_NAME
// This does not cover all dependencies (e.g. the ones that depends on arm versions)
static constexpr FeatureDep deps[] = {
{0, 0} // dummy
};
constexpr auto generic = get_feature_masks();
constexpr auto armv8a_crc = get_feature_masks(crc);
constexpr auto armv8a_crc_crypto = armv8a_crc | get_feature_masks(crypto);
constexpr auto armv8_1a = armv8a_crc | get_feature_masks(v8_1a, lse, rdm); // lor, hpd
constexpr auto armv8_2a = armv8_1a | get_feature_masks(v8_2a); // ras
constexpr auto armv8_2a_crypto = armv8_2a | get_feature_masks(crypto);
constexpr auto armv8_3a = armv8_2a | get_feature_masks(v8_3a, rcpc);
constexpr auto armv8_3a_crypto = armv8_3a | get_feature_masks(crypto);
constexpr auto arm_cortex_a32 = generic; // TODO? (crc, crypto)
constexpr auto arm_cortex_a35 = generic; // TODO? (crc, crypto)
constexpr auto arm_cortex_a53 = armv8a_crc;
constexpr auto arm_cortex_a55 = armv8_2a_crypto | get_feature_masks(rcpc); // dotprod;
constexpr auto arm_cortex_a57 = armv8a_crc;
constexpr auto arm_cortex_a72 = armv8a_crc;
constexpr auto arm_cortex_a73 = armv8a_crc;
constexpr auto arm_cortex_a75 = armv8_2a_crypto | get_feature_masks(rcpc); // dotprod;
constexpr auto cavium_thunderx = armv8a_crc_crypto;
constexpr auto cavium_thunderx88 = armv8a_crc_crypto;
constexpr auto cavium_thunderx88p1 = armv8a_crc_crypto;
constexpr auto cavium_thunderx81 = armv8a_crc_crypto;
constexpr auto cavium_thunderx83 = armv8a_crc_crypto;
constexpr auto cavium_thunderx2t99 = armv8a_crc_crypto | get_feature_masks(v8_1a);
constexpr auto cavium_thunderx2t99p1 = armv8a_crc_crypto | get_feature_masks(v8_1a);
constexpr auto nvidia_denver1 = generic; // TODO? (crc, crypto)
constexpr auto nvidia_denver2 = armv8a_crc_crypto;
constexpr auto apm_xgene1 = generic;
constexpr auto apm_xgene2 = generic; // TODO?
constexpr auto apm_xgene3 = generic; // TODO?
constexpr auto qualcomm_kyro = armv8a_crc_crypto;
constexpr auto qualcomm_falkor = armv8a_crc_crypto;
constexpr auto qualcomm_saphira = armv8_3a_crypto;
constexpr auto samsung_exynos_m1 = armv8a_crc_crypto;
constexpr auto samsung_exynos_m2 = armv8a_crc_crypto;
constexpr auto samsung_exynos_m3 = armv8a_crc_crypto;
constexpr auto apple_cyclone = armv8a_crc_crypto;
constexpr auto apple_typhoon = armv8a_crc_crypto;
constexpr auto apple_twister = armv8a_crc_crypto;
constexpr auto apple_hurricane = armv8a_crc_crypto;
}
static constexpr CPUSpec<CPU, feature_sz> cpus[] = {
{"generic", CPU::generic, CPU::generic, 0, Feature::generic},
{"armv8.1-a", CPU::armv8_1_a, CPU::generic, 0, Feature::armv8_1a},
{"armv8.2-a", CPU::armv8_2_a, CPU::generic, 0, Feature::armv8_2a},
{"armv8.3_a", CPU::armv8_3_a, CPU::generic, 0, Feature::armv8_3a},
{"cortex-a35", CPU::arm_cortex_a35, CPU::generic, 0, Feature::arm_cortex_a35},
{"cortex-a53", CPU::arm_cortex_a53, CPU::generic, 0, Feature::arm_cortex_a53},
{"cortex-a55", CPU::arm_cortex_a55, CPU::arm_cortex_a53, UINT32_MAX, Feature::arm_cortex_a55},
{"cortex-a57", CPU::arm_cortex_a57, CPU::generic, 0, Feature::arm_cortex_a57},
{"cortex-a72", CPU::arm_cortex_a72, CPU::generic, 0, Feature::arm_cortex_a72},
{"cortex-a73", CPU::arm_cortex_a73, CPU::generic, 0, Feature::arm_cortex_a73},
{"cortex-a75", CPU::arm_cortex_a75, CPU::arm_cortex_a73, UINT32_MAX, Feature::arm_cortex_a75},
{"thunderx", CPU::cavium_thunderx, CPU::generic, 50000, Feature::cavium_thunderx},
{"thunderxt88", CPU::cavium_thunderx88, CPU::generic, 50000, Feature::cavium_thunderx88},
{"thunderxt88p1", CPU::cavium_thunderx88p1, CPU::cavium_thunderx88, UINT32_MAX,
Feature::cavium_thunderx88p1},
{"thunderxt81", CPU::cavium_thunderx81, CPU::generic, 50000, Feature::cavium_thunderx81},
{"thunderxt83", CPU::cavium_thunderx83, CPU::generic, 50000, Feature::cavium_thunderx83},
{"thunderx2t99", CPU::cavium_thunderx2t99, CPU::generic, 50000,
Feature::cavium_thunderx2t99},
{"thunderx2t99p1", CPU::cavium_thunderx2t99p1, CPU::cavium_thunderx2t99, UINT32_MAX,
Feature::cavium_thunderx2t99p1},
{"denver1", CPU::nvidia_denver1, CPU::generic, UINT32_MAX, Feature::nvidia_denver1},
{"denver2", CPU::nvidia_denver2, CPU::generic, UINT32_MAX, Feature::nvidia_denver2},
{"xgene1", CPU::apm_xgene1, CPU::generic, UINT32_MAX, Feature::apm_xgene1},
{"xgene2", CPU::apm_xgene2, CPU::generic, UINT32_MAX, Feature::apm_xgene2},
{"xgene3", CPU::apm_xgene3, CPU::generic, UINT32_MAX, Feature::apm_xgene3},
{"kyro", CPU::qualcomm_kyro, CPU::generic, 0, Feature::qualcomm_kyro},
{"falkor", CPU::qualcomm_falkor, CPU::generic, 40000, Feature::qualcomm_falkor},
{"saphira", CPU::qualcomm_saphira, CPU::qualcomm_falkor, 60000, Feature::qualcomm_saphira},
{"exynos-m1", CPU::samsung_exynos_m1, CPU::generic, 0, Feature::samsung_exynos_m1},
{"exynos-m2", CPU::samsung_exynos_m2, CPU::samsung_exynos_m1, 40000,
Feature::samsung_exynos_m2},
{"exynos-m3", CPU::samsung_exynos_m3, CPU::samsung_exynos_m2, 40000,
Feature::samsung_exynos_m3},
{"cyclone", CPU::apple_cyclone, CPU::generic, 0, Feature::apple_cyclone},
{"typhoon", CPU::apple_typhoon, CPU::apple_cyclone, UINT32_MAX, Feature::apple_typhoon},
{"twister", CPU::apple_twister, CPU::apple_typhoon, UINT32_MAX, Feature::apple_twister},
{"hurricane", CPU::apple_hurricane, CPU::apple_twister, UINT32_MAX, Feature::apple_hurricane},
};
#else
static constexpr size_t feature_sz = 3;
static constexpr FeatureName feature_names[] = {
#define JL_FEATURE_DEF(name, bit, llvmver) {#name, bit, llvmver},
#define JL_FEATURE_DEF_NAME(name, bit, llvmver, str) {str, bit, llvmver},
#include "features_aarch32.h"
#undef JL_FEATURE_DEF
#undef JL_FEATURE_DEF_NAME
};
static constexpr uint32_t nfeature_names = sizeof(feature_names) / sizeof(FeatureName);
template<typename... Args>
static inline constexpr FeatureList<feature_sz> get_feature_masks(Args... args)
{
return ::get_feature_masks<feature_sz>(args...);
}
#define JL_FEATURE_DEF_NAME(name, bit, llvmver, str) JL_FEATURE_DEF(name, bit, llvmver)
static constexpr auto feature_masks = get_feature_masks(
#define JL_FEATURE_DEF(name, bit, llvmver) bit,
#include "features_aarch32.h"
#undef JL_FEATURE_DEF
-1);
static const auto real_feature_masks =
feature_masks & FeatureList<feature_sz>{{(uint32_t)-1, (uint32_t)-1, 0}};
namespace Feature {
enum : uint32_t {
#define JL_FEATURE_DEF(name, bit, llvmver) name = bit,
#include "features_aarch32.h"
#undef JL_FEATURE_DEF
};
#undef JL_FEATURE_DEF_NAME
// This does not cover all dependencies (e.g. the ones that depends on arm versions)
static constexpr FeatureDep deps[] = {
{neon, vfp3},
{vfp4, vfp3},
{crypto, neon},
};
// These are the real base requirements of the specific architectures
constexpr auto _armv7m = get_feature_masks(v7, mclass, hwdiv);
constexpr auto _armv7a = get_feature_masks(v7, aclass);
constexpr auto _armv7r = get_feature_masks(v7, rclass);
constexpr auto _armv8m = get_feature_masks(v7, v8, mclass, hwdiv);
constexpr auto _armv8a = get_feature_masks(v7, v8, aclass, neon, vfp3, vfp4, d32,
hwdiv, hwdiv_arm);
constexpr auto _armv8r = get_feature_masks(v7, v8, rclass, neon, vfp3, vfp4, d32,
hwdiv, hwdiv_arm);
// Set `generic` to match the feature requirement of the `C` code.
// we'll require at least these when compiling the sysimg.
#if __ARM_ARCH >= 8
# if !defined(__ARM_ARCH_PROFILE)
constexpr auto generic = get_feature_masks(v7, v8, hwdiv);
# elif __ARM_ARCH_PROFILE == 'A'
constexpr auto generic = _armv8a;
# elif __ARM_ARCH_PROFILE == 'R'
constexpr auto generic = _armv8r;
# elif __ARM_ARCH_PROFILE == 'M'
constexpr auto generic = _armv8m;
# else
constexpr auto generic = get_feature_masks(v7, v8, hwdiv);
# endif
#elif __ARM_ARCH == 7
# if !defined(__ARM_ARCH_PROFILE)
constexpr auto generic = get_feature_masks(v7);
# elif __ARM_ARCH_PROFILE == 'A'
constexpr auto generic = _armv7a;
# elif __ARM_ARCH_PROFILE == 'R'
constexpr auto generic = _armv7r;
# elif __ARM_ARCH_PROFILE == 'M'
constexpr auto generic = _armv7m;
# else
constexpr auto generic = get_feature_masks(v7);
# endif
#else
constexpr auto generic = get_feature_masks();
#endif
// All feature sets below should use or be or'ed with one of these (or generic).
// This makes sure that, for example, the `generic` target on `armv7-a` binary is equivalent
// to the `armv7-a` target.
constexpr auto armv7m = generic | _armv7m;
constexpr auto armv7a = generic | _armv7a;
constexpr auto armv7r = generic | _armv7r;
constexpr auto armv8m = generic | _armv8m;
constexpr auto armv8a = generic | _armv8a;
constexpr auto armv8r = generic | _armv8r;
// armv7l
constexpr auto arm_cortex_a5 = armv7a;
constexpr auto arm_cortex_a7 = armv7a | get_feature_masks(vfp3, vfp4, neon);
constexpr auto arm_cortex_a8 = armv7a | get_feature_masks(d32, vfp3, neon);
constexpr auto arm_cortex_a9 = armv7a;
constexpr auto arm_cortex_a12 = armv7a | get_feature_masks(d32, vfp3, vfp4, neon);
constexpr auto arm_cortex_a15 = armv7a | get_feature_masks(d32, vfp3, vfp4, neon);
constexpr auto arm_cortex_a17 = armv7a | get_feature_masks(d32, vfp3, vfp4, neon);
constexpr auto arm_cortex_r4 = armv7r | get_feature_masks(vfp3, hwdiv);
constexpr auto arm_cortex_r5 = armv7r | get_feature_masks(vfp3, hwdiv, hwdiv_arm);
constexpr auto arm_cortex_r7 = armv7r | get_feature_masks(vfp3, hwdiv, hwdiv_arm);
constexpr auto arm_cortex_r8 = armv7r | get_feature_masks(vfp3, hwdiv, hwdiv_arm);
constexpr auto qualcomm_scorpion = armv7a | get_feature_masks(v7, aclass, vfp3, neon);
constexpr auto qualcomm_krait = armv7a | get_feature_masks(vfp3, vfp4, neon, hwdiv, hwdiv_arm);
constexpr auto apple_swift = armv7a | get_feature_masks(d32, vfp3, vfp4, neon, hwdiv, hwdiv_arm);
constexpr auto marvell_pj4 = armv7a | get_feature_masks(vfp3);
constexpr auto intel_3735d = armv7a | get_feature_masks(vfp3, neon);
// armv8ml
constexpr auto arm_cortex_m23 = armv8m; // unsupported
constexpr auto arm_cortex_m33 = armv8m | get_feature_masks(v8_m_main); // unsupported
// armv8l
constexpr auto armv8a_crc = armv8a | get_feature_masks(crc);
constexpr auto armv8_1a = armv8a_crc | get_feature_masks(v8_1a);
constexpr auto armv8_2a = armv8_1a | get_feature_masks(v8_2a);
constexpr auto armv8a_crc_crypto = armv8a_crc | get_feature_masks(crypto);
constexpr auto armv8_2a_crypto = armv8_2a | get_feature_masks(crypto);
constexpr auto armv8_3a = armv8_2a | get_feature_masks(v8_3a);
constexpr auto armv8_3a_crypto = armv8_3a | get_feature_masks(crypto);
constexpr auto arm_cortex_a32 = armv8a; // TODO? (crc, crypto)
constexpr auto arm_cortex_r52 = armv8r; // TODO? (crc, crypto)
constexpr auto arm_cortex_a35 = armv8a; // TODO? (crc, crypto)
constexpr auto arm_cortex_a53 = armv8a_crc;
constexpr auto arm_cortex_a55 = armv8_2a_crypto;
constexpr auto arm_cortex_a57 = armv8a_crc;
constexpr auto arm_cortex_a72 = armv8a_crc;
constexpr auto arm_cortex_a73 = armv8a_crc;
constexpr auto arm_cortex_a75 = armv8_2a_crypto;
constexpr auto cavium_thunderx = armv8a_crc_crypto;
constexpr auto cavium_thunderx88 = armv8a_crc_crypto;
constexpr auto cavium_thunderx88p1 = armv8a_crc_crypto;
constexpr auto cavium_thunderx81 = armv8a_crc_crypto;
constexpr auto cavium_thunderx83 = armv8a_crc_crypto;
constexpr auto cavium_thunderx2t99 = armv8a_crc_crypto | get_feature_masks(v8_1a);
constexpr auto cavium_thunderx2t99p1 = armv8a_crc_crypto | get_feature_masks(v8_1a);
constexpr auto nvidia_denver1 = armv8a; // TODO? (crc, crypto)
constexpr auto nvidia_denver2 = armv8a_crc_crypto;
constexpr auto apm_xgene1 = armv8a;
constexpr auto apm_xgene2 = armv8a; // TODO?
constexpr auto apm_xgene3 = armv8a; // TODO?
constexpr auto qualcomm_kyro = armv8a_crc_crypto;
constexpr auto qualcomm_falkor = armv8a_crc_crypto;
constexpr auto qualcomm_saphira = armv8_3a_crypto;
constexpr auto samsung_exynos_m1 = armv8a_crc_crypto;
constexpr auto samsung_exynos_m2 = armv8a_crc_crypto;
constexpr auto samsung_exynos_m3 = armv8a_crc_crypto;
constexpr auto apple_cyclone = armv8a_crc_crypto;
constexpr auto apple_typhoon = armv8a_crc_crypto;
constexpr auto apple_twister = armv8a_crc_crypto;
constexpr auto apple_hurricane = armv8a_crc_crypto;
}
static constexpr CPUSpec<CPU, feature_sz> cpus[] = {
{"generic", CPU::generic, CPU::generic, 0, Feature::generic},
// armv6
{"mpcore", CPU::arm_mpcore, CPU::generic, 0, Feature::generic},
{"arm1136jf-s", CPU::arm_1136jf_s, CPU::generic, 0, Feature::generic},
{"arm1156t2f-s", CPU::arm_1156t2f_s, CPU::generic, 0, Feature::generic},
{"arm1176jzf-s", CPU::arm_1176jzf_s, CPU::generic, 0, Feature::generic},
{"cortex-m0", CPU::arm_cortex_m0, CPU::generic, 0, Feature::generic},
{"cortex-m1", CPU::arm_cortex_m1, CPU::generic, 0, Feature::generic},
// armv7ml
{"armv7-m", CPU::armv7_m, CPU::generic, 0, Feature::armv7m},
{"armv7e-m", CPU::armv7e_m, CPU::generic, 0, Feature::armv7m},
{"cortex-m3", CPU::arm_cortex_m3, CPU::generic, 0, Feature::armv7m},
{"cortex-m4", CPU::arm_cortex_m4, CPU::generic, 0, Feature::armv7m},
{"cortex-m7", CPU::arm_cortex_m7, CPU::generic, 0, Feature::armv7m},
// armv7l
{"armv7-a", CPU::armv7_a, CPU::generic, 0, Feature::armv7a},
{"armv7-r", CPU::armv7_r, CPU::generic, 0, Feature::armv7r},
{"cortex-a5", CPU::arm_cortex_a5, CPU::generic, 0, Feature::arm_cortex_a5},
{"cortex-a7", CPU::arm_cortex_a7, CPU::generic, 0, Feature::arm_cortex_a7},
{"cortex-a8", CPU::arm_cortex_a8, CPU::generic, 0, Feature::arm_cortex_a8},
{"cortex-a9", CPU::arm_cortex_a9, CPU::generic, 0, Feature::arm_cortex_a9},
{"cortex-a12", CPU::arm_cortex_a12, CPU::generic, 0, Feature::arm_cortex_a12},
{"cortex-a15", CPU::arm_cortex_a15, CPU::generic, 0, Feature::arm_cortex_a15},
{"cortex-a17", CPU::arm_cortex_a17, CPU::generic, 0, Feature::arm_cortex_a17},
{"cortex-r4", CPU::arm_cortex_r4, CPU::generic, 0, Feature::arm_cortex_r4},
{"cortex-r5", CPU::arm_cortex_r5, CPU::generic, 0, Feature::arm_cortex_r5},
{"cortex-r7", CPU::arm_cortex_r7, CPU::generic, 0, Feature::arm_cortex_r7},
{"cortex-r8", CPU::arm_cortex_r8, CPU::generic, 0, Feature::arm_cortex_r8},
{"scorpion", CPU::qualcomm_scorpion, CPU::armv7_a, UINT32_MAX, Feature::qualcomm_scorpion},
{"krait", CPU::qualcomm_krait, CPU::generic, 0, Feature::qualcomm_krait},
{"swift", CPU::apple_swift, CPU::generic, 0, Feature::apple_swift},
{"pj4", CPU::marvell_pj4, CPU::armv7_a, UINT32_MAX, Feature::marvell_pj4},
{"3735d", CPU::intel_3735d, CPU::armv7_a, UINT32_MAX, Feature::intel_3735d},
// armv8ml
{"armv8-m.base", CPU::armv8_m_base, CPU::generic, 0, Feature::armv8m},
{"armv8-m.main", CPU::armv8_m_main, CPU::generic, 0, Feature::armv8m},
{"cortex-m23", CPU::arm_cortex_m23, CPU::armv8_m_base, 50000, Feature::arm_cortex_m23},
{"cortex-m33", CPU::arm_cortex_m33, CPU::armv8_m_main, 50000, Feature::arm_cortex_m33},
// armv8l
{"armv8-a", CPU::armv8_a, CPU::generic, 0, Feature::armv8a},
{"armv8-r", CPU::armv8_r, CPU::generic, 0, Feature::armv8r},
{"armv8.1-a", CPU::armv8_1_a, CPU::generic, 0, Feature::armv8_1a},
{"armv8.2-a", CPU::armv8_2_a, CPU::generic, 0, Feature::armv8_2a},
{"armv8.3-a", CPU::armv8_3_a, CPU::generic, 0, Feature::armv8_3a},
{"cortex-a32", CPU::arm_cortex_a32, CPU::generic, 0, Feature::arm_cortex_a32},
{"cortex-r52", CPU::arm_cortex_r52, CPU::armv8_r, 40000, Feature::arm_cortex_r52},
{"cortex-a35", CPU::arm_cortex_a35, CPU::generic, 0, Feature::arm_cortex_a35},
{"cortex-a53", CPU::arm_cortex_a53, CPU::generic, 0, Feature::arm_cortex_a53},
{"cortex-a55", CPU::arm_cortex_a55, CPU::arm_cortex_a53, 60000, Feature::arm_cortex_a55},
{"cortex-a57", CPU::arm_cortex_a57, CPU::generic, 0, Feature::arm_cortex_a57},
{"cortex-a72", CPU::arm_cortex_a72, CPU::generic, 0, Feature::arm_cortex_a72},
{"cortex-a73", CPU::arm_cortex_a73, CPU::generic, 0, Feature::arm_cortex_a73},
{"cortex-a75", CPU::arm_cortex_a75, CPU::arm_cortex_a73, 60000, Feature::arm_cortex_a75},
{"thunderx", CPU::cavium_thunderx, CPU::armv8_a, UINT32_MAX, Feature::cavium_thunderx},
{"thunderx88", CPU::cavium_thunderx88, CPU::armv8_a, UINT32_MAX, Feature::cavium_thunderx88},
{"thunderx88p1", CPU::cavium_thunderx88p1, CPU::armv8_a, UINT32_MAX,
Feature::cavium_thunderx88p1},
{"thunderx81", CPU::cavium_thunderx81, CPU::armv8_a, UINT32_MAX,
Feature::cavium_thunderx81},
{"thunderx83", CPU::cavium_thunderx83, CPU::armv8_a, UINT32_MAX,
Feature::cavium_thunderx83},
{"thunderx2t99", CPU::cavium_thunderx2t99, CPU::armv8_a, UINT32_MAX,
Feature::cavium_thunderx2t99},
{"thunderx2t99p1", CPU::cavium_thunderx2t99p1, CPU::armv8_a, UINT32_MAX,
Feature::cavium_thunderx2t99p1},
{"denver1", CPU::nvidia_denver1, CPU::arm_cortex_a53, UINT32_MAX, Feature::nvidia_denver1},
{"denver2", CPU::nvidia_denver2, CPU::arm_cortex_a57, UINT32_MAX, Feature::nvidia_denver2},
{"xgene1", CPU::apm_xgene1, CPU::armv8_a, UINT32_MAX, Feature::apm_xgene1},
{"xgene2", CPU::apm_xgene2, CPU::armv8_a, UINT32_MAX, Feature::apm_xgene2},
{"xgene3", CPU::apm_xgene3, CPU::armv8_a, UINT32_MAX, Feature::apm_xgene3},
{"kyro", CPU::qualcomm_kyro, CPU::armv8_a, UINT32_MAX, Feature::qualcomm_kyro},
{"falkor", CPU::qualcomm_falkor, CPU::armv8_a, UINT32_MAX, Feature::qualcomm_falkor},
{"saphira", CPU::qualcomm_saphira, CPU::armv8_a, UINT32_MAX, Feature::qualcomm_saphira},
{"exynos-m1", CPU::samsung_exynos_m1, CPU::generic, 0, Feature::samsung_exynos_m1},
{"exynos-m2", CPU::samsung_exynos_m2, CPU::samsung_exynos_m1, 40000,
Feature::samsung_exynos_m2},
{"exynos-m3", CPU::samsung_exynos_m3, CPU::samsung_exynos_m2, 40000,
Feature::samsung_exynos_m3},
{"cyclone", CPU::apple_cyclone, CPU::generic, 0, Feature::apple_cyclone},
{"typhoon", CPU::apple_typhoon, CPU::apple_cyclone, UINT32_MAX, Feature::apple_typhoon},
{"twister", CPU::apple_twister, CPU::apple_typhoon, UINT32_MAX, Feature::apple_twister},
{"hurricane", CPU::apple_hurricane, CPU::apple_twister, UINT32_MAX, Feature::apple_hurricane},
};
#endif
static constexpr size_t ncpu_names = sizeof(cpus) / sizeof(cpus[0]);
// auxval reader
#ifndef AT_HWCAP
# define AT_HWCAP 16
#endif
#ifndef AT_HWCAP2
# define AT_HWCAP2 26
#endif
#if defined(DYN_GETAUXVAL)
static unsigned long getauxval_procfs(unsigned long type)
{
int fd = open("/proc/self/auxv", O_RDONLY);
if (fd == -1)
return 0;
unsigned long val = 0;
unsigned long buff[2];
while (read(fd, buff, sizeof(buff)) == sizeof(buff)) {
if (buff[0] == 0)
break;
if (buff[0] == type) {
val = buff[1];
break;
}
}
close(fd);
return val;
}
static inline unsigned long jl_getauxval(unsigned long type)
{
// First, try resolving getauxval in libc
auto libc = jl_dlopen(nullptr, JL_RTLD_LOCAL);
static unsigned long (*getauxval_p)(unsigned long) = NULL;
if (getauxval_p == NULL && jl_dlsym(libc, "getauxval", (void **)&getauxval_p, 0)) {
return getauxval_p(type);
}
// If we couldn't resolve it, use procfs.
return getauxval_procfs(type);
}
#else
static inline unsigned long jl_getauxval(unsigned long type)
{
return getauxval(type);
}
#endif
struct CPUID {
uint8_t implementer;
uint8_t variant;
uint16_t part;
bool operator<(const CPUID &right) const
{
if (implementer < right.implementer)
return true;
if (implementer > right.implementer)
return false;
if (part < right.part)
return true;
if (part > right.part)
return false;
return variant < right.variant;
}
};
// /sys/devices/system/cpu/cpu<n>/regs/identification/midr_el1 reader
static inline void get_cpuinfo_sysfs(std::set<CPUID> &res)
{
// This only works on a 64bit 4.7+ kernel
auto dir = opendir("/sys/devices/system/cpu");
if (!dir)
return;
while (auto entry = readdir(dir)) {
if (entry->d_type != DT_DIR)
continue;
if (strncmp(entry->d_name, "cpu", 3) != 0)
continue;
std::stringstream stm;
stm << "/sys/devices/system/cpu/" << entry->d_name << "/regs/identification/midr_el1";
std::ifstream file(stm.str());
if (!file)
continue;
uint64_t val = 0;
file >> std::hex >> val;
if (!file)
continue;
CPUID cpuid = {
uint8_t(val >> 24),
uint8_t((val >> 20) & 0xf),
uint16_t((val >> 4) & 0xfff)
};
res.insert(cpuid);
}
closedir(dir);
}
// Use an external template since lambda's can't be templated in C++11
template<typename T, typename F>
static inline bool try_read_procfs_line(llvm::StringRef line, const char *prefix, T &out,
bool &flag, F &&reset)
{
if (!line.startswith(prefix))
return false;
if (flag)
reset();
flag = line.substr(strlen(prefix)).ltrim("\t :").getAsInteger(0, out);
return true;
}
// /proc/cpuinfo reader
static inline void get_cpuinfo_procfs(std::set<CPUID> &res)
{
std::ifstream file("/proc/cpuinfo");
CPUID cpuid = {0, 0, 0};
bool impl = false;
bool part = false;
bool var = false;
auto reset = [&] () {
if (impl && part)
res.insert(cpuid);
impl = false;
part = false;
var = false;
memset(&cpuid, 0, sizeof(cpuid));
};
for (std::string line; std::getline(file, line);) {
if (line.empty()) {
reset();
continue;
}
try_read_procfs_line(line, "CPU implementer", cpuid.implementer, impl, reset) ||
try_read_procfs_line(line, "CPU variant", cpuid.variant, var, reset) ||
try_read_procfs_line(line, "CPU part", cpuid.part, part, reset);
}
reset();
}
static std::set<CPUID> get_cpuinfo(void)
{
std::set<CPUID> res;
get_cpuinfo_sysfs(res);
if (res.empty())
get_cpuinfo_procfs(res);
return res;
}
static CPU get_cpu_name(CPUID cpuid)
{
switch (cpuid.implementer) {
case 0x41: // ARM
switch (cpuid.part) {
case 0xb02: return CPU::arm_mpcore;
case 0xb36: return CPU::arm_1136jf_s;
case 0xb56: return CPU::arm_1156t2f_s;
case 0xb76: return CPU::arm_1176jzf_s;
case 0xc20: return CPU::arm_cortex_m0;
case 0xc21: return CPU::arm_cortex_m1;
case 0xc23: return CPU::arm_cortex_m3;
case 0xc24: return CPU::arm_cortex_m4;
case 0xc27: return CPU::arm_cortex_m7;
case 0xd20: return CPU::arm_cortex_m23;
case 0xd21: return CPU::arm_cortex_m33;
case 0xc05: return CPU::arm_cortex_a5;
case 0xc07: return CPU::arm_cortex_a7;
case 0xc08: return CPU::arm_cortex_a8;
case 0xc09: return CPU::arm_cortex_a9;
case 0xc0d: return CPU::arm_cortex_a12;
case 0xc0f: return CPU::arm_cortex_a15;
case 0xc0e: return CPU::arm_cortex_a17;
case 0xc14: return CPU::arm_cortex_r4;
case 0xc15: return CPU::arm_cortex_r5;
case 0xc17: return CPU::arm_cortex_r7;
case 0xc18: return CPU::arm_cortex_r8;
case 0xd13: return CPU::arm_cortex_r52;
case 0xd01: return CPU::arm_cortex_a32;
case 0xd04: return CPU::arm_cortex_a35;
case 0xd03: return CPU::arm_cortex_a53;
case 0xd05: return CPU::arm_cortex_a55;
case 0xd07: return CPU::arm_cortex_a57;
case 0xd08: return CPU::arm_cortex_a72;
case 0xd09: return CPU::arm_cortex_a73;
case 0xd0a: return CPU::arm_cortex_a75;
default: return CPU::generic;
}
case 0x42: // Broadcom (Cavium)
switch (cpuid.part) {
case 0x516: return CPU::cavium_thunderx2t99p1;
default: return CPU::generic;
}
case 0x43: // Cavium
switch (cpuid.part) {
case 0xa0: return CPU::cavium_thunderx;
case 0xa1:
if (cpuid.variant == 0)
return CPU::cavium_thunderx88p1;
return CPU::cavium_thunderx88;
case 0xa2: return CPU::cavium_thunderx81;
case 0xa3: return CPU::cavium_thunderx83;
case 0xaf: return CPU::cavium_thunderx2t99;
default: return CPU::generic;
}
case 0x4e: // NVIDIA
switch (cpuid.part) {
case 0x000: return CPU::nvidia_denver1;
case 0x003: return CPU::nvidia_denver2;
default: return CPU::generic;
}
case 0x50: // AppliedMicro
// x-gene 2
// x-gene 3
switch (cpuid.part) {
case 0x000: return CPU::apm_xgene1;
default: return CPU::generic;
}
case 0x51: // Qualcomm
switch (cpuid.part) {
case 0x00f:
case 0x02d:
return CPU::qualcomm_scorpion;
case 0x04d:
case 0x06f:
return CPU::qualcomm_krait;
case 0x201:
case 0x205:
case 0x211:
return CPU::qualcomm_kyro;
case 0x800:
case 0x801:
return CPU::arm_cortex_a73; // second-generation Kryo
case 0xc00:
return CPU::qualcomm_falkor;
case 0xc01:
return CPU::qualcomm_saphira;
default: return CPU::generic;
}
case 0x53: // Samsung
// exynos-m2
// exynos-m3
switch (cpuid.part) {
case 0x001: return CPU::samsung_exynos_m1;
default: return CPU::generic;
}
case 0x56: // Marvell
switch (cpuid.part) {
case 0x581:
case 0x584:
return CPU::marvell_pj4;
default: return CPU::generic;
}
case 0x67: // Apple
// swift
// cyclone
// twister
// hurricane
switch (cpuid.part) {
case 0x072: return CPU::apple_typhoon;
default: return CPU::generic;
}
case 0x69: // Intel
switch (cpuid.part) {
case 0x001: return CPU::intel_3735d;
default: return CPU::generic;
}
default:
return CPU::generic;
}
}
static std::pair<int,char> get_elf_arch(void)
{
#ifdef _CPU_AARCH64_
return std::make_pair(8, 'A');
#else
int ver = 0;
char profile = 0;
struct utsname name;
if (uname(&name) >= 0) {
// name.machine is the elf_platform in the kernel.
if (strcmp(name.machine, "armv6l") == 0) {
ver = 6;
}
else if (strcmp(name.machine, "armv7l") == 0) {
ver = 7;
}
else if (strcmp(name.machine, "armv7ml") == 0) {
ver = 7;
profile = 'M';
}
else if (strcmp(name.machine, "armv8l") == 0 || strcmp(name.machine, "aarch64") == 0) {
ver = 8;
}
}
if (__ARM_ARCH > ver)
ver = __ARM_ARCH;
# if __ARM_ARCH > 6 && defined(__ARM_ARCH_PROFILE)
profile = __ARM_ARCH_PROFILE;
# endif
return std::make_pair(ver, profile);
#endif
}
static inline const CPUSpec<CPU,feature_sz> *find_cpu(uint32_t cpu)
{
return ::find_cpu(cpu, cpus, ncpu_names);
}
static inline const CPUSpec<CPU,feature_sz> *find_cpu(llvm::StringRef name)
{
return ::find_cpu(name, cpus, ncpu_names);
}
static inline const char *find_cpu_name(uint32_t cpu)
{
return ::find_cpu_name(cpu, cpus, ncpu_names);
}
static std::pair<int,bool> feature_arch_version(const FeatureList<feature_sz> &feature)
{
#ifdef _CPU_AARCH64_
return std::make_pair(8, false);
#else
if (test_nbit(feature, Feature::v8))
return std::make_pair(8, test_nbit(feature, Feature::mclass));
if (test_nbit(feature, Feature::v7))
return std::make_pair(7, test_nbit(feature, Feature::mclass));
return std::make_pair(6, false);
#endif
}
static CPU generic_for_arch(std::pair<int,bool> arch)
{
#ifdef _CPU_AARCH64_
return CPU::generic;
#else
# if defined(__ARM_ARCH_PROFILE)
char klass = __ARM_ARCH_PROFILE;
# else
char klass = arch.second ? 'M' : 'A';
# endif
if (arch.first >= 8) {
if (klass == 'M') {
return CPU::armv8_m_base;
}
else if (klass == 'R') {
return CPU::armv8_r;
}
else {
return CPU::armv8_a;
}
}
else if (arch.first == 7) {
if (klass == 'M') {
return CPU::armv7_m;
}
else if (klass == 'R') {
return CPU::armv7_r;
}
else {
return CPU::armv7_a;
}
}
return CPU::generic;
#endif
}
static bool check_cpu_arch_ver(uint32_t cpu, std::pair<int,bool> arch)
{
auto spec = find_cpu(cpu);
// This happens on AArch64 and indicates that the cpu name isn't a valid aarch64 CPU
if (!spec)
return false;
auto cpu_arch = feature_arch_version(spec->features);
if (arch.second != cpu_arch.second)
return false;
if (arch.first > cpu_arch.first)
return false;
return true;
}
static void shrink_big_little(std::vector<std::pair<uint32_t,CPUID>> &list,
const CPU *cpus, uint32_t ncpu)
{
auto find = [&] (uint32_t name) {
for (uint32_t i = 0; i < ncpu; i++) {
if (cpus[i] == CPU(name)) {
return (int)i;
}
}
return -1;
};
int maxidx = -1;
for (auto &ele: list) {
int idx = find(ele.first);
if (idx > maxidx) {
maxidx = idx;
}
}
if (maxidx >= 0) {
list.erase(std::remove_if(list.begin(), list.end(), [&] (std::pair<uint32_t,CPUID> &ele) {
int idx = find(ele.first);
return idx != -1 && idx < maxidx;
}), list.end());
}
}
static NOINLINE std::pair<uint32_t,FeatureList<feature_sz>> _get_host_cpu()
{
FeatureList<feature_sz> features = {};
// Here we assume that only the lower 32bit are used on aarch64
// Change the cast here when that's not the case anymore (and when there's features in the
// high bits that we want to detect).
features[0] = (uint32_t)jl_getauxval(AT_HWCAP);
features[1] = (uint32_t)jl_getauxval(AT_HWCAP2);
auto cpuinfo = get_cpuinfo();
auto arch = get_elf_arch();
#ifdef _CPU_ARM_
if (arch.first >= 7) {
if (arch.second == 'M') {
set_bit(features, Feature::mclass, true);
}
else if (arch.second == 'R') {
set_bit(features, Feature::rclass, true);
}
else if (arch.second == 'A') {
set_bit(features, Feature::aclass, true);
}
}
switch (arch.first) {
case 8:
set_bit(features, Feature::v8, true);
JL_FALLTHROUGH;
case 7:
set_bit(features, Feature::v7, true);
break;
default:
break;
}
#endif
std::set<uint32_t> cpus;
std::vector<std::pair<uint32_t,CPUID>> list;
for (auto info: cpuinfo) {
auto name = (uint32_t)get_cpu_name(info);
if (name == 0)
continue;
if (!check_cpu_arch_ver(name, arch))
continue;
if (cpus.insert(name).second) {
features = features | find_cpu(name)->features;
list.emplace_back(name, info);
}
}
// Not all elements/pairs are valid
static constexpr CPU v8order[] = {
CPU::arm_cortex_a32,
CPU::arm_cortex_a35,
CPU::arm_cortex_a53,
CPU::arm_cortex_a55,
CPU::arm_cortex_a57,
CPU::arm_cortex_a72,
CPU::arm_cortex_a73,
CPU::arm_cortex_a75,
CPU::nvidia_denver2,
CPU::samsung_exynos_m1
};
shrink_big_little(list, v8order, sizeof(v8order) / sizeof(CPU));
#ifdef _CPU_ARM_
// Not all elements/pairs are valid
static constexpr CPU v7order[] = {
CPU::arm_cortex_a5,
CPU::arm_cortex_a7,
CPU::arm_cortex_a8,
CPU::arm_cortex_a9,
CPU::arm_cortex_a12,
CPU::arm_cortex_a15,
CPU::arm_cortex_a17
};
shrink_big_little(list, v7order, sizeof(v7order) / sizeof(CPU));
#endif
uint32_t cpu = 0;
if (list.empty()) {
cpu = (uint32_t)generic_for_arch(arch);
}
else {
// This also covers `list.size() > 1` case which means there's a unknown combination
// consists of CPU's we know. Unclear what else we could try so just randomly return
// one...
cpu = list[0].first;
}
// Ignore feature bits that we are not interested in.
mask_features(feature_masks, &features[0]);
return std::make_pair(cpu, features);
}
static inline const std::pair<uint32_t,FeatureList<feature_sz>> &get_host_cpu()
{
static auto host_cpu = _get_host_cpu();
return host_cpu;
}
static bool is_generic_cpu_name(uint32_t cpu)
{
switch ((CPU)cpu) {
case CPU::generic:
case CPU::armv7_a:
case CPU::armv7_m:
case CPU::armv7e_m: