| products/Sources/formale Sprachen/JAVA/openjdk-20-36_src/src/hotspot/cpu/x86/ |
|
Quellcode-Bibliothek© Kompilation durch diese Firma[Weder Korrektheit noch Funktionsfähigkeit der Software werden zugesichert.]Datei: vm_version_x86.hpp Sprache: C |
|
||||||
|
/*
* Copyright (c) 1997, 2022, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef CPU_X86_VM_VERSION_X86_HPP #define CPU_X86_VM_VERSION_X86_HPP #include "runtime/abstract_vm_version.hpp" #include "utilities/macros.hpp" #include "utilities/sizes.hpp" class VM_Version : public Abstract_VM_Version { friend class VMStructs; friend class JVMCIVMStructs; public: // cpuid result register layouts. These are all unions of a uint32_t // (in case anyone wants access to the register as a whole) and a bitfield. union StdCpuid1Eax { uint32_t value; struct { uint32_t stepping : 4, model : 4, family : 4, proc_type : 2, : 2, ext_model : 4, ext_family : 8, : 4; } bits; }; union StdCpuid1Ebx { // example, unused uint32_t value; struct { uint32_t brand_id : 8, clflush_size : 8, threads_per_cpu : 8, apic_id : 8; } bits; }; union StdCpuid1Ecx { uint32_t value; struct { uint32_t sse3 : 1, clmul : 1, : 1, monitor : 1, : 1, vmx : 1, : 1, est : 1, : 1, ssse3 : 1, cid : 1, : 1, fma : 1, cmpxchg16: 1, : 4, dca : 1, sse4_1 : 1, sse4_2 : 1, : 2, popcnt : 1, : 1, aes : 1, : 1, osxsave : 1, avx : 1, f16c : 1, : 1, hv : 1; } bits; }; union StdCpuid1Edx { uint32_t value; struct { uint32_t : 4, tsc : 1, : 3, cmpxchg8 : 1, : 6, cmov : 1, : 3, clflush : 1, : 3, mmx : 1, fxsr : 1, sse : 1, sse2 : 1, : 1, ht : 1, : 3; } bits; }; union DcpCpuid4Eax { uint32_t value; struct { uint32_t cache_type : 5, : 21, cores_per_cpu : 6; } bits; }; union DcpCpuid4Ebx { uint32_t value; struct { uint32_t L1_line_size : 12, partitions : 10, associativity : 10; } bits; }; union TplCpuidBEbx { uint32_t value; struct { uint32_t logical_cpus : 16, : 16; } bits; }; union ExtCpuid1Ecx { uint32_t value; struct { uint32_t LahfSahf : 1, CmpLegacy : 1, : 3, lzcnt : 1, sse4a : 1, misalignsse : 1, prefetchw : 1, : 23; } bits; }; union ExtCpuid1Edx { uint32_t value; struct { uint32_t : 22, mmx_amd : 1, mmx : 1, fxsr : 1, fxsr_opt : 1, pdpe1gb : 1, rdtscp : 1, : 1, long_mode : 1, tdnow2 : 1, tdnow : 1; } bits; }; union ExtCpuid5Ex { uint32_t value; struct { uint32_t L1_line_size : 8, L1_tag_lines : 8, L1_assoc : 8, L1_size : 8; } bits; }; union ExtCpuid7Edx { uint32_t value; struct { uint32_t : 8, tsc_invariance : 1, : 23; } bits; }; union ExtCpuid8Ecx { uint32_t value; struct { uint32_t cores_per_cpu : 8, : 24; } bits; }; union SefCpuid7Eax { uint32_t value; }; union SefCpuid7Ebx { uint32_t value; struct { uint32_t fsgsbase : 1, : 2, bmi1 : 1, : 1, avx2 : 1, : 2, bmi2 : 1, erms : 1, : 1, rtm : 1, : 4, avx512f : 1, avx512dq : 1, : 1, adx : 1, : 1, avx512ifma : 1, : 1, clflushopt : 1, clwb : 1, : 1, avx512pf : 1, avx512er : 1, avx512cd : 1, sha : 1, avx512bw : 1, avx512vl : 1; } bits; }; union SefCpuid7Ecx { uint32_t value; struct { uint32_t prefetchwt1 : 1, avx512_vbmi : 1, umip : 1, pku : 1, ospke : 1, : 1, avx512_vbmi2 : 1, cet_ss : 1, gfni : 1, vaes : 1, avx512_vpclmulqdq : 1, avx512_vnni : 1, avx512_bitalg : 1, : 1, avx512_vpopcntdq : 1, : 1, : 1, mawau : 5, rdpid : 1, : 9; } bits; }; union SefCpuid7Edx { uint32_t value; struct { uint32_t : 2, avx512_4vnniw : 1, avx512_4fmaps : 1, fast_short_rep_mov : 1, : 9, serialize : 1, : 5, cet_ibt : 1, : 11; } bits; }; union ExtCpuid1EEbx { uint32_t value; struct { uint32_t : 8, threads_per_core : 8, : 16; } bits; }; union XemXcr0Eax { uint32_t value; struct { uint32_t x87 : 1, sse : 1, ymm : 1, bndregs : 1, bndcsr : 1, opmask : 1, zmm512 : 1, zmm32 : 1, : 24; } bits; }; protected: static int _cpu; static int _model; static int _stepping; static bool _has_intel_jcc_erratum; static address _cpuinfo_segv_addr; // address of instruction which causes SEGV static address _cpuinfo_cont_addr; // address of instruction after the one which causes SEGV /* * Update following files when declaring new flags: * test/lib-test/jdk/test/whitebox/CPUInfoTest.java * src/jdk.internal.vm.ci/share/classes/jdk.vm.ci.amd64/src/jdk/vm/ci/amd64/AMD64. */ enum Feature_Flag : uint64_t { #define CPU_FEATURE_FLAGS(decl) \ decl(CX8, "cx8", 0) /* next bits are from cpuid 1 (EDX) */ \ decl(CMOV, "cmov", 1) \ decl(FXSR, "fxsr", 2) \ decl(HT, "ht", 3) \ \ decl(MMX, "mmx", 4) \ decl(3DNOW_PREFETCH, "3dnowpref", 5) /* Processor supports 3dnow prefetch and prefetchw in /* may not necessarily support other 3dnow instructions */ \ decl(SSE, "sse", 6) \ decl(SSE2, "sse2", 7) \ \ decl(SSE3, "sse3", 8 ) /* SSE3 comes from cpuid 1 (ECX) */ \ decl(SSSE3, "ssse3", 9 ) \ decl(SSE4A, "sse4a", 10) \ decl(SSE4_1, "sse4.1", 11) \ \ decl(SSE4_2, "sse4.2", 12) \ decl(POPCNT, "popcnt", 13) \ decl(LZCNT, "lzcnt", 14) \ decl(TSC, "tsc", 15) \ \ decl(TSCINV_BIT, "tscinvbit", 16) \ decl(TSCINV, "tscinv", 17) \ decl(AVX, "avx", 18) \ decl(AVX2, "avx2", 19) \ \ decl(AES, "aes", 20) \ decl(ERMS, "erms", 21) /* enhanced 'rep movsb/stosb' instructions */ \ decl(CLMUL, "clmul", 22) /* carryless multiply for CRC */ \ decl(BMI1, "bmi1", 23) \ \ decl(BMI2, "bmi2", 24) \ decl(RTM, "rtm", 25) /* Restricted Transactional Memory instructions */ \ decl(ADX, "adx", 26) \ decl(AVX512F, "avx512f", 27) /* AVX 512bit foundation instructions */ \ \ decl(AVX512DQ, "avx512dq", 28) \ decl(AVX512PF, "avx512pf", 29) \ decl(AVX512ER, "avx512er", 30) \ decl(AVX512CD, "avx512cd", 31) \ \ decl(AVX512BW, "avx512bw", 32) /* Byte and word vector instructions */ \ decl(AVX512VL, "avx512vl", 33) /* EVEX instructions with smaller vector length */ \ decl(SHA, "sha", 34) /* SHA instructions */ \ decl(FMA, "fma", 35) /* FMA instructions */ \ \ decl(VZEROUPPER, "vzeroupper", 36) /* Vzeroupper instruction */ \ decl(AVX512_VPOPCNTDQ, "avx512_vpopcntdq", 37) /* Vector popcount */ \ decl(AVX512_VPCLMULQDQ, "avx512_vpclmulqdq", 38) /* Vector carryless multiplication */ \ decl(AVX512_VAES, "avx512_vaes", 39) /* Vector AES instruction */ \ \ decl(AVX512_VNNI, "avx512_vnni", 40) /* Vector Neural Network Instructions */ \ decl(FLUSH, "clflush", 41) /* flush instruction */ \ decl(FLUSHOPT, "clflushopt", 42) /* flusopth instruction */ \ decl(CLWB, "clwb", 43) /* clwb instruction */ \ \ decl(AVX512_VBMI2, "avx512_vbmi2", 44) /* VBMI2 shift left double instructions */ \ decl(AVX512_VBMI, "avx512_vbmi", 45) /* Vector BMI instructions */ \ decl(HV, "hv", 46) /* Hypervisor instructions */ \ decl(SERIALIZE, "serialize", 47) /* CPU SERIALIZE */ \ decl(RDTSCP, "rdtscp", 48) /* RDTSCP instruction */ \ decl(RDPID, "rdpid", 49) /* RDPID instruction */ \ decl(FSRM, "fsrm", 50) /* Fast Short REP MOV */ \ decl(GFNI, "gfni", 51) /* Vector GFNI instructions */ \ decl(AVX512_BITALG, "avx512_bitalg", 52) /* Vector sub-word popcount and bit gather instru decl(F16C, "f16c", 53) /* Half-precision and single precision FP conversion instructions*/ decl(PKU, "pku", 54) /* Protection keys for user-mode pages */ \ decl(OSPKE, "ospke", 55) /* OS enables protection keys */ \ decl(CET_IBT, "cet_ibt", 56) /* Control Flow Enforcement - Indirect Branch Tracking */ \ decl(CET_SS, "cet_ss", 57) /* Control Flow Enforcement - Shadow Stack */ \ decl(AVX512_IFMA, "avx512_ifma", 58) /* Integer Vector FMA instructions*/ #define DECLARE_CPU_FEATURE_FLAG(id, name, bit) CPU_##id = (1ULL << bit), CPU_FEATURE_FLAGS(DECLARE_CPU_FEATURE_FLAG) #undef DECLARE_CPU_FEATURE_FLAG }; static const char* _features_names[]; enum Extended_Family { // AMD CPU_FAMILY_AMD_11H = 0x11, // ZX CPU_FAMILY_ZX_CORE_F6 = 6, CPU_FAMILY_ZX_CORE_F7 = 7, // Intel CPU_FAMILY_INTEL_CORE = 6, CPU_MODEL_NEHALEM = 0x1e, CPU_MODEL_NEHALEM_EP = 0x1a, CPU_MODEL_NEHALEM_EX = 0x2e, CPU_MODEL_WESTMERE = 0x25, CPU_MODEL_WESTMERE_EP = 0x2c, CPU_MODEL_WESTMERE_EX = 0x2f, CPU_MODEL_SANDYBRIDGE = 0x2a, CPU_MODEL_SANDYBRIDGE_EP = 0x2d, CPU_MODEL_IVYBRIDGE_EP = 0x3a, CPU_MODEL_HASWELL_E3 = 0x3c, CPU_MODEL_HASWELL_E7 = 0x3f, CPU_MODEL_BROADWELL = 0x3d, CPU_MODEL_SKYLAKE = 0x55 }; // cpuid information block. All info derived from executing cpuid with // various function numbers is stored here. Intel and AMD info is // merged in this block: accessor methods disentangle it. // // The info block is laid out in subblocks of 4 dwords corresponding to // eax, ebx, ecx and edx, whether or not they contain anything useful. struct CpuidInfo { // cpuid function 0 uint32_t std_max_function; uint32_t std_vendor_name_0; uint32_t std_vendor_name_1; uint32_t std_vendor_name_2; // cpuid function 1 StdCpuid1Eax std_cpuid1_eax; StdCpuid1Ebx std_cpuid1_ebx; StdCpuid1Ecx std_cpuid1_ecx; StdCpuid1Edx std_cpuid1_edx; // cpuid function 4 (deterministic cache parameters) DcpCpuid4Eax dcp_cpuid4_eax; DcpCpuid4Ebx dcp_cpuid4_ebx; uint32_t dcp_cpuid4_ecx; // unused currently uint32_t dcp_cpuid4_edx; // unused currently // cpuid function 7 (structured extended features) SefCpuid7Eax sef_cpuid7_eax; SefCpuid7Ebx sef_cpuid7_ebx; SefCpuid7Ecx sef_cpuid7_ecx; SefCpuid7Edx sef_cpuid7_edx; // cpuid function 0xB (processor topology) // ecx = 0 uint32_t tpl_cpuidB0_eax; TplCpuidBEbx tpl_cpuidB0_ebx; uint32_t tpl_cpuidB0_ecx; // unused currently uint32_t tpl_cpuidB0_edx; // unused currently // ecx = 1 uint32_t tpl_cpuidB1_eax; TplCpuidBEbx tpl_cpuidB1_ebx; uint32_t tpl_cpuidB1_ecx; // unused currently uint32_t tpl_cpuidB1_edx; // unused currently // ecx = 2 uint32_t tpl_cpuidB2_eax; TplCpuidBEbx tpl_cpuidB2_ebx; uint32_t tpl_cpuidB2_ecx; // unused currently uint32_t tpl_cpuidB2_edx; // unused currently // cpuid function 0x80000000 // example, unused uint32_t ext_max_function; uint32_t ext_vendor_name_0; uint32_t ext_vendor_name_1; uint32_t ext_vendor_name_2; // cpuid function 0x80000001 uint32_t ext_cpuid1_eax; // reserved uint32_t ext_cpuid1_ebx; // reserved ExtCpuid1Ecx ext_cpuid1_ecx; ExtCpuid1Edx ext_cpuid1_edx; // cpuid functions 0x80000002 thru 0x80000004: example, unused uint32_t proc_name_0, proc_name_1, proc_name_2, proc_name_3; uint32_t proc_name_4, proc_name_5, proc_name_6, proc_name_7; uint32_t proc_name_8, proc_name_9, proc_name_10,proc_name_11; // cpuid function 0x80000005 // AMD L1, Intel reserved uint32_t ext_cpuid5_eax; // unused currently uint32_t ext_cpuid5_ebx; // reserved ExtCpuid5Ex ext_cpuid5_ecx; // L1 data cache info (AMD) ExtCpuid5Ex ext_cpuid5_edx; // L1 instruction cache info (AMD) // cpuid function 0x80000007 uint32_t ext_cpuid7_eax; // reserved uint32_t ext_cpuid7_ebx; // reserved uint32_t ext_cpuid7_ecx; // reserved ExtCpuid7Edx ext_cpuid7_edx; // tscinv // cpuid function 0x80000008 uint32_t ext_cpuid8_eax; // unused currently uint32_t ext_cpuid8_ebx; // reserved ExtCpuid8Ecx ext_cpuid8_ecx; uint32_t ext_cpuid8_edx; // reserved // cpuid function 0x8000001E // AMD 17h uint32_t ext_cpuid1E_eax; ExtCpuid1EEbx ext_cpuid1E_ebx; // threads per core (AMD17h) uint32_t ext_cpuid1E_ecx; uint32_t ext_cpuid1E_edx; // unused currently // extended control register XCR0 (the XFEATURE_ENABLED_MASK register) XemXcr0Eax xem_xcr0_eax; uint32_t xem_xcr0_edx; // reserved // Space to save ymm registers after signal handle int ymm_save[8*4]; // Save ymm0, ymm7, ymm8, ymm15 // Space to save zmm registers after signal handle int zmm_save[16*4]; // Save zmm0, zmm7, zmm8, zmm31 }; private: // The actual cpuid info block static CpuidInfo _cpuid_info; // Extractors and predicates static uint32_t extended_cpu_family() { uint32_t result = _cpuid_info.std_cpuid1_eax.bits.family; result += _cpuid_info.std_cpuid1_eax.bits.ext_family; return result; } static uint32_t extended_cpu_model() { uint32_t result = _cpuid_info.std_cpuid1_eax.bits.model; result |= _cpuid_info.std_cpuid1_eax.bits.ext_model << 4; return result; } static uint32_t cpu_stepping() { uint32_t result = _cpuid_info.std_cpuid1_eax.bits.stepping; return result; } static uint logical_processor_count() { uint result = threads_per_core(); return result; } static bool compute_has_intel_jcc_erratum(); static uint64_t feature_flags(); static bool os_supports_avx_vectors(); static void get_processor_features(); public: // Offsets for cpuid asm stub static ByteSize std_cpuid0_offset() { return byte_offset_of(CpuidInfo, std_max_functio static ByteSize std_cpuid1_offset() { return byte_offset_of(CpuidInfo, std_cpuid1_eax) static ByteSize dcp_cpuid4_offset() { return byte_offset_of(CpuidInfo, dcp_cpuid4_eax) static ByteSize sef_cpuid7_offset() { return byte_offset_of(CpuidInfo, sef_cpuid7_eax) static ByteSize ext_cpuid1_offset() { return byte_offset_of(CpuidInfo, ext_cpuid1_eax) static ByteSize ext_cpuid5_offset() { return byte_offset_of(CpuidInfo, ext_cpuid5_eax) static ByteSize ext_cpuid7_offset() { return byte_offset_of(CpuidInfo, ext_cpuid7_eax) static ByteSize ext_cpuid8_offset() { return byte_offset_of(CpuidInfo, ext_cpuid8_eax) static ByteSize ext_cpuid1E_offset() { return byte_offset_of(CpuidInfo, ext_cpuid1E_ea static ByteSize tpl_cpuidB0_offset() { return byte_offset_of(CpuidInfo, tpl_cpuidB0_ea static ByteSize tpl_cpuidB1_offset() { return byte_offset_of(CpuidInfo, tpl_cpuidB1_ea static ByteSize tpl_cpuidB2_offset() { return byte_offset_of(CpuidInfo, tpl_cpuidB2_ea static ByteSize xem_xcr0_offset() { return byte_offset_of(CpuidInfo, xem_xcr0_eax); } static ByteSize ymm_save_offset() { return byte_offset_of(CpuidInfo, ymm_save); } static ByteSize zmm_save_offset() { return byte_offset_of(CpuidInfo, zmm_save); } // The value used to check ymm register after signal handle static int ymm_test_value() { return 0xCAFEBABE; } static void get_cpu_info_wrapper(); static void set_cpuinfo_segv_addr(address pc) { _cpuinfo_segv_addr = pc; } static bool is_cpuinfo_segv_addr(address pc) { return _cpuinfo_segv_addr == pc; } static void set_cpuinfo_cont_addr(address pc) { _cpuinfo_cont_addr = pc; } static address cpuinfo_cont_addr() { return _cpuinfo_cont_addr; } static void clean_cpuFeatures() { _features = 0; } static void set_avx_cpuFeatures() { _features = (CPU_SSE | CPU_SSE2 | CPU_AVX | CPU_VZEROUPP static void set_evex_cpuFeatures() { _features = (CPU_AVX512F | CPU_SSE | CPU_SSE2 | CPU_VZE // Initialization static void initialize(); // Override Abstract_VM_Version implementation static void print_platform_virtualization_info(outputStream*); // Asserts static void assert_is_initialized() { assert(_cpuid_info.std_cpuid1_eax.bits.family != 0, "VM_Version not initialized"); } // // Processor family: // 3 - 386 // 4 - 486 // 5 - Pentium // 6 - PentiumPro, Pentium II, Celeron, Xeon, Pentium III, Athlon, // Pentium M, Core Solo, Core Duo, Core2 Duo // family 6 model: 9, 13, 14, 15 // 0x0f - Pentium 4, Opteron // // Note: The cpu family should be used to select between // instruction sequences which are valid on all Intel // processors. Use the feature test functions below to // determine whether a particular instruction is supported. // static int cpu_family() { return _cpu;} static bool is_P6() { return cpu_family() >= 6; } static bool is_amd() { assert_is_initialized(); return _cpuid_info.std_vendor_name_0 == static bool is_hygon() { assert_is_initialized(); return _cpuid_info.std_vendor_name_0 static bool is_amd_family() { return is_amd() || is_hygon(); } static bool is_intel() { assert_is_initialized(); return _cpuid_info.std_vendor_name_0 static bool is_zx() { assert_is_initialized(); return (_cpuid_info.std_vendor_name_0 == static bool is_atom_family() { return ((cpu_family() == 0x06) && ((extended_cpu_model() == 0x static bool is_knights_family() { return UseKNLSetting || ((cpu_family() == 0x06) && ((extend static bool supports_processor_topology() { return (_cpuid_info.std_max_function >= 0xB) && // eax[4:0] | ebx[0:15] == 0 indicates invalid topology level. // Some cpus have max cpuid >= 0xB but do not support processor topology. (((_cpuid_info.tpl_cpuidB0_eax & 0x1f) | _cpuid_info.tpl_cpuidB0_ebx.bits.logica } static uint cores_per_cpu(); static uint threads_per_core(); static intx L1_line_size(); static intx prefetch_data_size() { return L1_line_size(); } // // Feature identification // static bool supports_cpuid() { return _features != 0; } static bool supports_cmpxchg8() { return (_features & CPU_CX8) != 0; } static bool supports_cmov() { return (_features & CPU_CMOV) != 0; } static bool supports_fxsr() { return (_features & CPU_FXSR) != 0; } static bool supports_ht() { return (_features & CPU_HT) != 0; } static bool supports_mmx() { return (_features & CPU_MMX) != 0; } static bool supports_sse() { return (_features & CPU_SSE) != 0; } static bool supports_sse2() { return (_features & CPU_SSE2) != 0; } static bool supports_sse3() { return (_features & CPU_SSE3) != 0; } static bool supports_ssse3() { return (_features & CPU_SSSE3)!= 0; } static bool supports_sse4_1() { return (_features & CPU_SSE4_1) != 0; } static bool supports_sse4_2() { return (_features & CPU_SSE4_2) != 0; } static bool supports_popcnt() { return (_features & CPU_POPCNT) != 0; } static bool supports_avx() { return (_features & CPU_AVX) != 0; } static bool supports_avx2() { return (_features & CPU_AVX2) != 0; } static bool supports_tsc() { return (_features & CPU_TSC) != 0; } static bool supports_rdtscp() { return (_features & CPU_RDTSCP) != 0; } static bool supports_rdpid() { return (_features & CPU_RDPID) != 0; } static bool supports_aes() { return (_features & CPU_AES) != 0; } static bool supports_erms() { return (_features & CPU_ERMS) != 0; } static bool supports_fsrm() { return (_features & CPU_FSRM) != 0; } static bool supports_clmul() { return (_features & CPU_CLMUL) != 0; } static bool supports_rtm() { return (_features & CPU_RTM) != 0; } static bool supports_bmi1() { return (_features & CPU_BMI1) != 0; } static bool supports_bmi2() { return (_features & CPU_BMI2) != 0; } static bool supports_adx() { return (_features & CPU_ADX) != 0; } static bool supports_evex() { return (_features & CPU_AVX512F) != 0; } static bool supports_avx512dq() { return (_features & CPU_AVX512DQ) != 0; } static bool supports_avx512ifma() { return (_features & CPU_AVX512_IFMA) != 0; } static bool supports_avx512pf() { return (_features & CPU_AVX512PF) != 0; } static bool supports_avx512er() { return (_features & CPU_AVX512ER) != 0; } static bool supports_avx512cd() { return (_features & CPU_AVX512CD) != 0; } static bool supports_avx512bw() { return (_features & CPU_AVX512BW) != 0; } static bool supports_avx512vl() { return (_features & CPU_AVX512VL) != 0; } static bool supports_avx512vlbw() { return (supports_evex() && supports_avx512bw() && support static bool supports_avx512bwdq() { return (supports_evex() && supports_avx512bw() && support static bool supports_avx512vldq() { return (supports_evex() && supports_avx512dq() && support static bool supports_avx512vlbwdq() { return (supports_evex() && supports_avx512vl() && supports_avx512bw() && supports_avx512dq()); } static bool supports_avx512novl() { return (supports_evex() && !supports_avx512vl()); } static bool supports_avx512nobw() { return (supports_evex() && !supports_avx512bw()); } static bool supports_avx256only() { return (supports_avx2() && !supports_evex()); } static bool supports_avxonly() { return ((supports_avx2() || supports_avx()) && !supports_e static bool supports_sha() { return (_features & CPU_SHA) != 0; } static bool supports_fma() { return (_features & CPU_FMA) != 0 && supports_avx(); } static bool supports_vzeroupper() { return (_features & CPU_VZEROUPPER) != 0; } static bool supports_avx512_vpopcntdq() { return (_features & CPU_AVX512_VPOPCNTDQ) static bool supports_avx512_vpclmulqdq() { return (_features & CPU_AVX512_VPCLMULQD static bool supports_avx512_vaes() { return (_features & CPU_AVX512_VAES) != 0; } static bool supports_gfni() { return (_features & CPU_GFNI) != 0; } static bool supports_avx512_vnni() { return (_features & CPU_AVX512_VNNI) != 0; } static bool supports_avx512_bitalg() { return (_features & CPU_AVX512_BITALG) != 0; } static bool supports_avx512_vbmi() { return (_features & CPU_AVX512_VBMI) != 0; } static bool supports_avx512_vbmi2() { return (_features & CPU_AVX512_VBMI2) != 0; } static bool supports_hv() { return (_features & CPU_HV) != 0; } static bool supports_serialize() { return (_features & CPU_SERIALIZE) != 0; } static bool supports_f16c() { return (_features & CPU_F16C) != 0; } static bool supports_pku() { return (_features & CPU_PKU) != 0; } static bool supports_ospke() { return (_features & CPU_OSPKE) != 0; } static bool supports_cet_ss() { return (_features & CPU_CET_SS) != 0; } static bool supports_cet_ibt() { return (_features & CPU_CET_IBT) != 0; } // Intel features static bool is_intel_family_core() { return is_intel() && extended_cpu_family() == CPU_FAMILY_INTEL_CORE; } static bool is_intel_skylake() { return is_intel_family_core() && extended_cpu_model() == CPU_MODEL_SKYLAKE; } static int avx3_threshold(); static bool is_intel_tsc_synched_at_init(); // This checks if the JVM is potentially affected by an erratum on Intel CPUs (SKX102) // that causes unpredictable behaviour when jcc crosses 64 byte boundaries. Its microcode // mitigation causes regressions when jumps or fused conditional branches cross or end at // 32 byte boundaries. static bool has_intel_jcc_erratum() { return _has_intel_jcc_erratum; } // AMD features static bool supports_3dnow_prefetch() { return (_features & CPU_3DNOW_PREFETCH) != 0; static bool supports_lzcnt() { return (_features & CPU_LZCNT) != 0; } static bool supports_sse4a() { return (_features & CPU_SSE4A) != 0; } static bool is_amd_Barcelona() { return is_amd() && extended_cpu_family() == CPU_FAMILY_AMD_11H; } // Intel and AMD newer cores support fast timestamps well static bool supports_tscinv_bit() { return (_features & CPU_TSCINV_BIT) != 0; } static bool supports_tscinv() { return (_features & CPU_TSCINV) != 0; } // Intel Core and newer cpus have fast IDIV instruction (excluding Atom). static bool has_fast_idiv() { return is_intel() && cpu_family() == 6 && supports_sse3() && _model != 0x1C; } static bool supports_compare_and_exchange() { return true; } static intx allocate_prefetch_distance(bool use_watermark_prefetch); // SSE2 and later processors implement a 'pause' instruction // that can be used for efficient implementation of // the intrinsic for java.lang.Thread.onSpinWait() static bool supports_on_spin_wait() { return supports_sse2(); } // x86_64 supports fast class initialization checks for static methods. static bool supports_fast_class_init_checks() { return LP64_ONLY(true) NOT_LP64(false); // not implemented on x86_32 } constexpr static bool supports_stack_watermark_barrier() { return true; } // there are several insns to force cache line sync to memory which // we can use to ensure mapped non-volatile memory is up to date with // pending in-cache changes. // // 64 bit cpus always support clflush which writes back and evicts // on 32 bit cpus support is recorded via a feature flag // // clflushopt is optional and acts like clflush except it does // not synchronize with other memory ops. it needs a preceding // and trailing StoreStore fence // // clwb is an optional intel-specific instruction which // writes back without evicting the line. it also does not // synchronize with other memory ops. so, it needs preceding // and trailing StoreStore fences. #ifdef _LP64 static bool supports_clflush(); // Can't inline due to header file conflict #else static bool supports_clflush() { return ((_features & CPU_FLUSH) != 0); } #endif // _LP64 // Note: CPU_FLUSHOPT and CPU_CLWB bits should always be zero for 32-bit static bool supports_clflushopt() { return ((_features & CPU_FLUSHOPT) != 0); } static bool supports_clwb() { return ((_features & CPU_CLWB) != 0); } // Old CPUs perform lea on AGU which causes additional latency transferring the // value from/to ALU for other operations static bool supports_fast_2op_lea() { return (is_intel() && supports_avx()) || // Sandy Bridge and above (is_amd() && supports_avx()); // Jaguar and Bulldozer and above } // Pre Icelake Intels suffer inefficiency regarding 3-operand lea, which contains // all of base register, index register and displacement immediate, with 3 latency. // Note that when the address contains no displacement but the base register is // rbp or r13, the machine code must contain a zero displacement immediate, // effectively transform a 2-operand lea into a 3-operand lea. This can be // replaced by add-add or lea-add static bool supports_fast_3op_lea() { return supports_fast_2op_lea() && ((is_intel() && supports_clwb() && !is_intel_skylake()) || // Icelake and above is_amd()); } #ifdef __APPLE__ // Is the CPU running emulated (for example macOS Rosetta running x86_64 code on M1 ARM (aarch64 static bool is_cpu_emulated(); #endif // support functions for virtualization detection private: static void check_virtualizations(); static const char* cpu_family_description(void); static const char* cpu_model_description(void); static const char* cpu_brand(void); static const char* cpu_brand_string(void); static int cpu_type_description(char* const buf, size_t buf_len); static int cpu_detailed_description(char* const buf, size_t buf_len); static int cpu_extended_brand_string(char* const buf, size_t buf_len); static bool cpu_is_em64t(void); static bool is_netburst(void); // Returns bytes written excluding termninating null byte. static size_t cpu_write_support_string(char* const buf, size_t buf_len); static void resolve_cpu_information_details(void); static int64_t max_qualified_cpu_freq_from_brand_string(void); public: // Offsets for cpuid asm stub brand string static ByteSize proc_name_0_offset() { return byte_offset_of(CpuidInfo, proc_name_0); } static ByteSize proc_name_1_offset() { return byte_offset_of(CpuidInfo, proc_name_1); } static ByteSize proc_name_2_offset() { return byte_offset_of(CpuidInfo, proc_name_2); } static ByteSize proc_name_3_offset() { return byte_offset_of(CpuidInfo, proc_name_3); } static ByteSize proc_name_4_offset() { return byte_offset_of(CpuidInfo, proc_name_4); } static ByteSize proc_name_5_offset() { return byte_offset_of(CpuidInfo, proc_name_5); } static ByteSize proc_name_6_offset() { return byte_offset_of(CpuidInfo, proc_name_6); } static ByteSize proc_name_7_offset() { return byte_offset_of(CpuidInfo, proc_name_7); } static ByteSize proc_name_8_offset() { return byte_offset_of(CpuidInfo, proc_name_8); } static ByteSize proc_name_9_offset() { return byte_offset_of(CpuidInfo, proc_name_9); } static ByteSize proc_name_10_offset() { return byte_offset_of(CpuidInfo, proc_name_10) static ByteSize proc_name_11_offset() { return byte_offset_of(CpuidInfo, proc_name_11) static int64_t maximum_qualified_cpu_frequency(void); static bool supports_tscinv_ext(void); static void initialize_tsc(); static void initialize_cpu_information(void); }; #endif // CPU_X86_VM_VERSION_X86_HPP ¤ Dauer der Verarbeitung: 0.31 Sekunden (vorverarbeitet) ¤ |
Haftungshinweis
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:Die farbliche Syntaxdarstellung ist noch experimentell.Bot Zugriff |
