/
Host.cpp
1997 lines (1825 loc) · 64.5 KB
/
Host.cpp
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//===-- Host.cpp - Implement OS Host Detection ------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the operating system Host detection.
//
//===----------------------------------------------------------------------===//
#include "llvm/TargetParser/Host.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TargetParser/Triple.h"
#include "llvm/TargetParser/X86TargetParser.h"
#include <string.h>
// Include the platform-specific parts of this class.
#ifdef LLVM_ON_UNIX
#include "Unix/Host.inc"
#include <sched.h>
#endif
#ifdef _WIN32
#include "Windows/Host.inc"
#endif
#ifdef _MSC_VER
#include <intrin.h>
#endif
#ifdef __MVS__
#include "llvm/Support/BCD.h"
#endif
#if defined(__APPLE__)
#include <mach/host_info.h>
#include <mach/mach.h>
#include <mach/mach_host.h>
#include <mach/machine.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#endif
#ifdef _AIX
#include <sys/systemcfg.h>
#endif
#if defined(__sun__) && defined(__svr4__)
#include <kstat.h>
#endif
#define DEBUG_TYPE "host-detection"
//===----------------------------------------------------------------------===//
//
// Implementations of the CPU detection routines
//
//===----------------------------------------------------------------------===//
using namespace llvm;
static std::unique_ptr<llvm::MemoryBuffer>
LLVM_ATTRIBUTE_UNUSED getProcCpuinfoContent() {
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Text =
llvm::MemoryBuffer::getFileAsStream("/proc/cpuinfo");
if (std::error_code EC = Text.getError()) {
llvm::errs() << "Can't read "
<< "/proc/cpuinfo: " << EC.message() << "\n";
return nullptr;
}
return std::move(*Text);
}
StringRef sys::detail::getHostCPUNameForPowerPC(StringRef ProcCpuinfoContent) {
// Access to the Processor Version Register (PVR) on PowerPC is privileged,
// and so we must use an operating-system interface to determine the current
// processor type. On Linux, this is exposed through the /proc/cpuinfo file.
const char *generic = "generic";
// The cpu line is second (after the 'processor: 0' line), so if this
// buffer is too small then something has changed (or is wrong).
StringRef::const_iterator CPUInfoStart = ProcCpuinfoContent.begin();
StringRef::const_iterator CPUInfoEnd = ProcCpuinfoContent.end();
StringRef::const_iterator CIP = CPUInfoStart;
StringRef::const_iterator CPUStart = nullptr;
size_t CPULen = 0;
// We need to find the first line which starts with cpu, spaces, and a colon.
// After the colon, there may be some additional spaces and then the cpu type.
while (CIP < CPUInfoEnd && CPUStart == nullptr) {
if (CIP < CPUInfoEnd && *CIP == '\n')
++CIP;
if (CIP < CPUInfoEnd && *CIP == 'c') {
++CIP;
if (CIP < CPUInfoEnd && *CIP == 'p') {
++CIP;
if (CIP < CPUInfoEnd && *CIP == 'u') {
++CIP;
while (CIP < CPUInfoEnd && (*CIP == ' ' || *CIP == '\t'))
++CIP;
if (CIP < CPUInfoEnd && *CIP == ':') {
++CIP;
while (CIP < CPUInfoEnd && (*CIP == ' ' || *CIP == '\t'))
++CIP;
if (CIP < CPUInfoEnd) {
CPUStart = CIP;
while (CIP < CPUInfoEnd && (*CIP != ' ' && *CIP != '\t' &&
*CIP != ',' && *CIP != '\n'))
++CIP;
CPULen = CIP - CPUStart;
}
}
}
}
}
if (CPUStart == nullptr)
while (CIP < CPUInfoEnd && *CIP != '\n')
++CIP;
}
if (CPUStart == nullptr)
return generic;
return StringSwitch<const char *>(StringRef(CPUStart, CPULen))
.Case("604e", "604e")
.Case("604", "604")
.Case("7400", "7400")
.Case("7410", "7400")
.Case("7447", "7400")
.Case("7455", "7450")
.Case("G4", "g4")
.Case("POWER4", "970")
.Case("PPC970FX", "970")
.Case("PPC970MP", "970")
.Case("G5", "g5")
.Case("POWER5", "g5")
.Case("A2", "a2")
.Case("POWER6", "pwr6")
.Case("POWER7", "pwr7")
.Case("POWER8", "pwr8")
.Case("POWER8E", "pwr8")
.Case("POWER8NVL", "pwr8")
.Case("POWER9", "pwr9")
.Case("POWER10", "pwr10")
// FIXME: If we get a simulator or machine with the capabilities of
// mcpu=future, we should revisit this and add the name reported by the
// simulator/machine.
.Default(generic);
}
StringRef sys::detail::getHostCPUNameForARM(StringRef ProcCpuinfoContent) {
// The cpuid register on arm is not accessible from user space. On Linux,
// it is exposed through the /proc/cpuinfo file.
// Read 32 lines from /proc/cpuinfo, which should contain the CPU part line
// in all cases.
SmallVector<StringRef, 32> Lines;
ProcCpuinfoContent.split(Lines, "\n");
// Look for the CPU implementer line.
StringRef Implementer;
StringRef Hardware;
StringRef Part;
for (unsigned I = 0, E = Lines.size(); I != E; ++I) {
if (Lines[I].startswith("CPU implementer"))
Implementer = Lines[I].substr(15).ltrim("\t :");
if (Lines[I].startswith("Hardware"))
Hardware = Lines[I].substr(8).ltrim("\t :");
if (Lines[I].startswith("CPU part"))
Part = Lines[I].substr(8).ltrim("\t :");
}
if (Implementer == "0x41") { // ARM Ltd.
// MSM8992/8994 may give cpu part for the core that the kernel is running on,
// which is undeterministic and wrong. Always return cortex-a53 for these SoC.
if (Hardware.endswith("MSM8994") || Hardware.endswith("MSM8996"))
return "cortex-a53";
// The CPU part is a 3 digit hexadecimal number with a 0x prefix. The
// values correspond to the "Part number" in the CP15/c0 register. The
// contents are specified in the various processor manuals.
// This corresponds to the Main ID Register in Technical Reference Manuals.
// and is used in programs like sys-utils
return StringSwitch<const char *>(Part)
.Case("0x926", "arm926ej-s")
.Case("0xb02", "mpcore")
.Case("0xb36", "arm1136j-s")
.Case("0xb56", "arm1156t2-s")
.Case("0xb76", "arm1176jz-s")
.Case("0xc08", "cortex-a8")
.Case("0xc09", "cortex-a9")
.Case("0xc0f", "cortex-a15")
.Case("0xc20", "cortex-m0")
.Case("0xc23", "cortex-m3")
.Case("0xc24", "cortex-m4")
.Case("0xd22", "cortex-m55")
.Case("0xd02", "cortex-a34")
.Case("0xd04", "cortex-a35")
.Case("0xd03", "cortex-a53")
.Case("0xd05", "cortex-a55")
.Case("0xd46", "cortex-a510")
.Case("0xd07", "cortex-a57")
.Case("0xd08", "cortex-a72")
.Case("0xd09", "cortex-a73")
.Case("0xd0a", "cortex-a75")
.Case("0xd0b", "cortex-a76")
.Case("0xd0d", "cortex-a77")
.Case("0xd41", "cortex-a78")
.Case("0xd47", "cortex-a710")
.Case("0xd4d", "cortex-a715")
.Case("0xd44", "cortex-x1")
.Case("0xd4c", "cortex-x1c")
.Case("0xd48", "cortex-x2")
.Case("0xd4e", "cortex-x3")
.Case("0xd0c", "neoverse-n1")
.Case("0xd49", "neoverse-n2")
.Case("0xd40", "neoverse-v1")
.Case("0xd4f", "neoverse-v2")
.Default("generic");
}
if (Implementer == "0x42" || Implementer == "0x43") { // Broadcom | Cavium.
return StringSwitch<const char *>(Part)
.Case("0x516", "thunderx2t99")
.Case("0x0516", "thunderx2t99")
.Case("0xaf", "thunderx2t99")
.Case("0x0af", "thunderx2t99")
.Case("0xa1", "thunderxt88")
.Case("0x0a1", "thunderxt88")
.Default("generic");
}
if (Implementer == "0x46") { // Fujitsu Ltd.
return StringSwitch<const char *>(Part)
.Case("0x001", "a64fx")
.Default("generic");
}
if (Implementer == "0x4e") { // NVIDIA Corporation
return StringSwitch<const char *>(Part)
.Case("0x004", "carmel")
.Default("generic");
}
if (Implementer == "0x48") // HiSilicon Technologies, Inc.
// The CPU part is a 3 digit hexadecimal number with a 0x prefix. The
// values correspond to the "Part number" in the CP15/c0 register. The
// contents are specified in the various processor manuals.
return StringSwitch<const char *>(Part)
.Case("0xd01", "tsv110")
.Default("generic");
if (Implementer == "0x51") // Qualcomm Technologies, Inc.
// The CPU part is a 3 digit hexadecimal number with a 0x prefix. The
// values correspond to the "Part number" in the CP15/c0 register. The
// contents are specified in the various processor manuals.
return StringSwitch<const char *>(Part)
.Case("0x06f", "krait") // APQ8064
.Case("0x201", "kryo")
.Case("0x205", "kryo")
.Case("0x211", "kryo")
.Case("0x800", "cortex-a73") // Kryo 2xx Gold
.Case("0x801", "cortex-a73") // Kryo 2xx Silver
.Case("0x802", "cortex-a75") // Kryo 3xx Gold
.Case("0x803", "cortex-a75") // Kryo 3xx Silver
.Case("0x804", "cortex-a76") // Kryo 4xx Gold
.Case("0x805", "cortex-a76") // Kryo 4xx/5xx Silver
.Case("0xc00", "falkor")
.Case("0xc01", "saphira")
.Default("generic");
if (Implementer == "0x53") { // Samsung Electronics Co., Ltd.
// The Exynos chips have a convoluted ID scheme that doesn't seem to follow
// any predictive pattern across variants and parts.
unsigned Variant = 0, Part = 0;
// Look for the CPU variant line, whose value is a 1 digit hexadecimal
// number, corresponding to the Variant bits in the CP15/C0 register.
for (auto I : Lines)
if (I.consume_front("CPU variant"))
I.ltrim("\t :").getAsInteger(0, Variant);
// Look for the CPU part line, whose value is a 3 digit hexadecimal
// number, corresponding to the PartNum bits in the CP15/C0 register.
for (auto I : Lines)
if (I.consume_front("CPU part"))
I.ltrim("\t :").getAsInteger(0, Part);
unsigned Exynos = (Variant << 12) | Part;
switch (Exynos) {
default:
// Default by falling through to Exynos M3.
[[fallthrough]];
case 0x1002:
return "exynos-m3";
case 0x1003:
return "exynos-m4";
}
}
if (Implementer == "0xc0") { // Ampere Computing
return StringSwitch<const char *>(Part)
.Case("0xac3", "ampere1")
.Case("0xac4", "ampere1a")
.Default("generic");
}
return "generic";
}
namespace {
StringRef getCPUNameFromS390Model(unsigned int Id, bool HaveVectorSupport) {
switch (Id) {
case 2064: // z900 not supported by LLVM
case 2066:
case 2084: // z990 not supported by LLVM
case 2086:
case 2094: // z9-109 not supported by LLVM
case 2096:
return "generic";
case 2097:
case 2098:
return "z10";
case 2817:
case 2818:
return "z196";
case 2827:
case 2828:
return "zEC12";
case 2964:
case 2965:
return HaveVectorSupport? "z13" : "zEC12";
case 3906:
case 3907:
return HaveVectorSupport? "z14" : "zEC12";
case 8561:
case 8562:
return HaveVectorSupport? "z15" : "zEC12";
case 3931:
case 3932:
default:
return HaveVectorSupport? "z16" : "zEC12";
}
}
} // end anonymous namespace
StringRef sys::detail::getHostCPUNameForS390x(StringRef ProcCpuinfoContent) {
// STIDP is a privileged operation, so use /proc/cpuinfo instead.
// The "processor 0:" line comes after a fair amount of other information,
// including a cache breakdown, but this should be plenty.
SmallVector<StringRef, 32> Lines;
ProcCpuinfoContent.split(Lines, "\n");
// Look for the CPU features.
SmallVector<StringRef, 32> CPUFeatures;
for (unsigned I = 0, E = Lines.size(); I != E; ++I)
if (Lines[I].startswith("features")) {
size_t Pos = Lines[I].find(':');
if (Pos != StringRef::npos) {
Lines[I].drop_front(Pos + 1).split(CPUFeatures, ' ');
break;
}
}
// We need to check for the presence of vector support independently of
// the machine type, since we may only use the vector register set when
// supported by the kernel (and hypervisor).
bool HaveVectorSupport = false;
for (unsigned I = 0, E = CPUFeatures.size(); I != E; ++I) {
if (CPUFeatures[I] == "vx")
HaveVectorSupport = true;
}
// Now check the processor machine type.
for (unsigned I = 0, E = Lines.size(); I != E; ++I) {
if (Lines[I].startswith("processor ")) {
size_t Pos = Lines[I].find("machine = ");
if (Pos != StringRef::npos) {
Pos += sizeof("machine = ") - 1;
unsigned int Id;
if (!Lines[I].drop_front(Pos).getAsInteger(10, Id))
return getCPUNameFromS390Model(Id, HaveVectorSupport);
}
break;
}
}
return "generic";
}
StringRef sys::detail::getHostCPUNameForRISCV(StringRef ProcCpuinfoContent) {
// There are 24 lines in /proc/cpuinfo
SmallVector<StringRef> Lines;
ProcCpuinfoContent.split(Lines, "\n");
// Look for uarch line to determine cpu name
StringRef UArch;
for (unsigned I = 0, E = Lines.size(); I != E; ++I) {
if (Lines[I].startswith("uarch")) {
UArch = Lines[I].substr(5).ltrim("\t :");
break;
}
}
return StringSwitch<const char *>(UArch)
.Case("sifive,u74-mc", "sifive-u74")
.Case("sifive,bullet0", "sifive-u74")
.Default("generic");
}
StringRef sys::detail::getHostCPUNameForBPF() {
#if !defined(__linux__) || !defined(__x86_64__)
return "generic";
#else
uint8_t v3_insns[40] __attribute__ ((aligned (8))) =
/* BPF_MOV64_IMM(BPF_REG_0, 0) */
{ 0xb7, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
/* BPF_MOV64_IMM(BPF_REG_2, 1) */
0xb7, 0x2, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0,
/* BPF_JMP32_REG(BPF_JLT, BPF_REG_0, BPF_REG_2, 1) */
0xae, 0x20, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0,
/* BPF_MOV64_IMM(BPF_REG_0, 1) */
0xb7, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0,
/* BPF_EXIT_INSN() */
0x95, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };
uint8_t v2_insns[40] __attribute__ ((aligned (8))) =
/* BPF_MOV64_IMM(BPF_REG_0, 0) */
{ 0xb7, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
/* BPF_MOV64_IMM(BPF_REG_2, 1) */
0xb7, 0x2, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0,
/* BPF_JMP_REG(BPF_JLT, BPF_REG_0, BPF_REG_2, 1) */
0xad, 0x20, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0,
/* BPF_MOV64_IMM(BPF_REG_0, 1) */
0xb7, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0,
/* BPF_EXIT_INSN() */
0x95, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0 };
struct bpf_prog_load_attr {
uint32_t prog_type;
uint32_t insn_cnt;
uint64_t insns;
uint64_t license;
uint32_t log_level;
uint32_t log_size;
uint64_t log_buf;
uint32_t kern_version;
uint32_t prog_flags;
} attr = {};
attr.prog_type = 1; /* BPF_PROG_TYPE_SOCKET_FILTER */
attr.insn_cnt = 5;
attr.insns = (uint64_t)v3_insns;
attr.license = (uint64_t)"DUMMY";
int fd = syscall(321 /* __NR_bpf */, 5 /* BPF_PROG_LOAD */, &attr,
sizeof(attr));
if (fd >= 0) {
close(fd);
return "v3";
}
/* Clear the whole attr in case its content changed by syscall. */
memset(&attr, 0, sizeof(attr));
attr.prog_type = 1; /* BPF_PROG_TYPE_SOCKET_FILTER */
attr.insn_cnt = 5;
attr.insns = (uint64_t)v2_insns;
attr.license = (uint64_t)"DUMMY";
fd = syscall(321 /* __NR_bpf */, 5 /* BPF_PROG_LOAD */, &attr, sizeof(attr));
if (fd >= 0) {
close(fd);
return "v2";
}
return "v1";
#endif
}
#if defined(__i386__) || defined(_M_IX86) || \
defined(__x86_64__) || defined(_M_X64)
// The check below for i386 was copied from clang's cpuid.h (__get_cpuid_max).
// Check motivated by bug reports for OpenSSL crashing on CPUs without CPUID
// support. Consequently, for i386, the presence of CPUID is checked first
// via the corresponding eflags bit.
// Removal of cpuid.h header motivated by PR30384
// Header cpuid.h and method __get_cpuid_max are not used in llvm, clang, openmp
// or test-suite, but are used in external projects e.g. libstdcxx
static bool isCpuIdSupported() {
#if defined(__GNUC__) || defined(__clang__)
#if defined(__i386__)
int __cpuid_supported;
__asm__(" pushfl\n"
" popl %%eax\n"
" movl %%eax,%%ecx\n"
" xorl $0x00200000,%%eax\n"
" pushl %%eax\n"
" popfl\n"
" pushfl\n"
" popl %%eax\n"
" movl $0,%0\n"
" cmpl %%eax,%%ecx\n"
" je 1f\n"
" movl $1,%0\n"
"1:"
: "=r"(__cpuid_supported)
:
: "eax", "ecx");
if (!__cpuid_supported)
return false;
#endif
return true;
#endif
return true;
}
/// getX86CpuIDAndInfo - Execute the specified cpuid and return the 4 values in
/// the specified arguments. If we can't run cpuid on the host, return true.
static bool getX86CpuIDAndInfo(unsigned value, unsigned *rEAX, unsigned *rEBX,
unsigned *rECX, unsigned *rEDX) {
#if defined(__GNUC__) || defined(__clang__)
#if defined(__x86_64__)
// gcc doesn't know cpuid would clobber ebx/rbx. Preserve it manually.
// FIXME: should we save this for Clang?
__asm__("movq\t%%rbx, %%rsi\n\t"
"cpuid\n\t"
"xchgq\t%%rbx, %%rsi\n\t"
: "=a"(*rEAX), "=S"(*rEBX), "=c"(*rECX), "=d"(*rEDX)
: "a"(value));
return false;
#elif defined(__i386__)
__asm__("movl\t%%ebx, %%esi\n\t"
"cpuid\n\t"
"xchgl\t%%ebx, %%esi\n\t"
: "=a"(*rEAX), "=S"(*rEBX), "=c"(*rECX), "=d"(*rEDX)
: "a"(value));
return false;
#else
return true;
#endif
#elif defined(_MSC_VER)
// The MSVC intrinsic is portable across x86 and x64.
int registers[4];
__cpuid(registers, value);
*rEAX = registers[0];
*rEBX = registers[1];
*rECX = registers[2];
*rEDX = registers[3];
return false;
#else
return true;
#endif
}
namespace llvm {
namespace sys {
namespace detail {
namespace x86 {
VendorSignatures getVendorSignature(unsigned *MaxLeaf) {
unsigned EAX = 0, EBX = 0, ECX = 0, EDX = 0;
if (MaxLeaf == nullptr)
MaxLeaf = &EAX;
else
*MaxLeaf = 0;
if (!isCpuIdSupported())
return VendorSignatures::UNKNOWN;
if (getX86CpuIDAndInfo(0, MaxLeaf, &EBX, &ECX, &EDX) || *MaxLeaf < 1)
return VendorSignatures::UNKNOWN;
// "Genu ineI ntel"
if (EBX == 0x756e6547 && EDX == 0x49656e69 && ECX == 0x6c65746e)
return VendorSignatures::GENUINE_INTEL;
// "Auth enti cAMD"
if (EBX == 0x68747541 && EDX == 0x69746e65 && ECX == 0x444d4163)
return VendorSignatures::AUTHENTIC_AMD;
return VendorSignatures::UNKNOWN;
}
} // namespace x86
} // namespace detail
} // namespace sys
} // namespace llvm
using namespace llvm::sys::detail::x86;
/// getX86CpuIDAndInfoEx - Execute the specified cpuid with subleaf and return
/// the 4 values in the specified arguments. If we can't run cpuid on the host,
/// return true.
static bool getX86CpuIDAndInfoEx(unsigned value, unsigned subleaf,
unsigned *rEAX, unsigned *rEBX, unsigned *rECX,
unsigned *rEDX) {
#if defined(__GNUC__) || defined(__clang__)
#if defined(__x86_64__)
// gcc doesn't know cpuid would clobber ebx/rbx. Preserve it manually.
// FIXME: should we save this for Clang?
__asm__("movq\t%%rbx, %%rsi\n\t"
"cpuid\n\t"
"xchgq\t%%rbx, %%rsi\n\t"
: "=a"(*rEAX), "=S"(*rEBX), "=c"(*rECX), "=d"(*rEDX)
: "a"(value), "c"(subleaf));
return false;
#elif defined(__i386__)
__asm__("movl\t%%ebx, %%esi\n\t"
"cpuid\n\t"
"xchgl\t%%ebx, %%esi\n\t"
: "=a"(*rEAX), "=S"(*rEBX), "=c"(*rECX), "=d"(*rEDX)
: "a"(value), "c"(subleaf));
return false;
#else
return true;
#endif
#elif defined(_MSC_VER)
int registers[4];
__cpuidex(registers, value, subleaf);
*rEAX = registers[0];
*rEBX = registers[1];
*rECX = registers[2];
*rEDX = registers[3];
return false;
#else
return true;
#endif
}
// Read control register 0 (XCR0). Used to detect features such as AVX.
static bool getX86XCR0(unsigned *rEAX, unsigned *rEDX) {
#if defined(__GNUC__) || defined(__clang__)
// Check xgetbv; this uses a .byte sequence instead of the instruction
// directly because older assemblers do not include support for xgetbv and
// there is no easy way to conditionally compile based on the assembler used.
__asm__(".byte 0x0f, 0x01, 0xd0" : "=a"(*rEAX), "=d"(*rEDX) : "c"(0));
return false;
#elif defined(_MSC_FULL_VER) && defined(_XCR_XFEATURE_ENABLED_MASK)
unsigned long long Result = _xgetbv(_XCR_XFEATURE_ENABLED_MASK);
*rEAX = Result;
*rEDX = Result >> 32;
return false;
#else
return true;
#endif
}
static void detectX86FamilyModel(unsigned EAX, unsigned *Family,
unsigned *Model) {
*Family = (EAX >> 8) & 0xf; // Bits 8 - 11
*Model = (EAX >> 4) & 0xf; // Bits 4 - 7
if (*Family == 6 || *Family == 0xf) {
if (*Family == 0xf)
// Examine extended family ID if family ID is F.
*Family += (EAX >> 20) & 0xff; // Bits 20 - 27
// Examine extended model ID if family ID is 6 or F.
*Model += ((EAX >> 16) & 0xf) << 4; // Bits 16 - 19
}
}
static StringRef
getIntelProcessorTypeAndSubtype(unsigned Family, unsigned Model,
const unsigned *Features,
unsigned *Type, unsigned *Subtype) {
auto testFeature = [&](unsigned F) {
return (Features[F / 32] & (1U << (F % 32))) != 0;
};
StringRef CPU;
switch (Family) {
case 3:
CPU = "i386";
break;
case 4:
CPU = "i486";
break;
case 5:
if (testFeature(X86::FEATURE_MMX)) {
CPU = "pentium-mmx";
break;
}
CPU = "pentium";
break;
case 6:
switch (Model) {
case 0x0f: // Intel Core 2 Duo processor, Intel Core 2 Duo mobile
// processor, Intel Core 2 Quad processor, Intel Core 2 Quad
// mobile processor, Intel Core 2 Extreme processor, Intel
// Pentium Dual-Core processor, Intel Xeon processor, model
// 0Fh. All processors are manufactured using the 65 nm process.
case 0x16: // Intel Celeron processor model 16h. All processors are
// manufactured using the 65 nm process
CPU = "core2";
*Type = X86::INTEL_CORE2;
break;
case 0x17: // Intel Core 2 Extreme processor, Intel Xeon processor, model
// 17h. All processors are manufactured using the 45 nm process.
//
// 45nm: Penryn , Wolfdale, Yorkfield (XE)
case 0x1d: // Intel Xeon processor MP. All processors are manufactured using
// the 45 nm process.
CPU = "penryn";
*Type = X86::INTEL_CORE2;
break;
case 0x1a: // Intel Core i7 processor and Intel Xeon processor. All
// processors are manufactured using the 45 nm process.
case 0x1e: // Intel(R) Core(TM) i7 CPU 870 @ 2.93GHz.
// As found in a Summer 2010 model iMac.
case 0x1f:
case 0x2e: // Nehalem EX
CPU = "nehalem";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_NEHALEM;
break;
case 0x25: // Intel Core i7, laptop version.
case 0x2c: // Intel Core i7 processor and Intel Xeon processor. All
// processors are manufactured using the 32 nm process.
case 0x2f: // Westmere EX
CPU = "westmere";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_WESTMERE;
break;
case 0x2a: // Intel Core i7 processor. All processors are manufactured
// using the 32 nm process.
case 0x2d:
CPU = "sandybridge";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_SANDYBRIDGE;
break;
case 0x3a:
case 0x3e: // Ivy Bridge EP
CPU = "ivybridge";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_IVYBRIDGE;
break;
// Haswell:
case 0x3c:
case 0x3f:
case 0x45:
case 0x46:
CPU = "haswell";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_HASWELL;
break;
// Broadwell:
case 0x3d:
case 0x47:
case 0x4f:
case 0x56:
CPU = "broadwell";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_BROADWELL;
break;
// Skylake:
case 0x4e: // Skylake mobile
case 0x5e: // Skylake desktop
case 0x8e: // Kaby Lake mobile
case 0x9e: // Kaby Lake desktop
case 0xa5: // Comet Lake-H/S
case 0xa6: // Comet Lake-U
CPU = "skylake";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_SKYLAKE;
break;
// Rocketlake:
case 0xa7:
CPU = "rocketlake";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_ROCKETLAKE;
break;
// Skylake Xeon:
case 0x55:
*Type = X86::INTEL_COREI7;
if (testFeature(X86::FEATURE_AVX512BF16)) {
CPU = "cooperlake";
*Subtype = X86::INTEL_COREI7_COOPERLAKE;
} else if (testFeature(X86::FEATURE_AVX512VNNI)) {
CPU = "cascadelake";
*Subtype = X86::INTEL_COREI7_CASCADELAKE;
} else {
CPU = "skylake-avx512";
*Subtype = X86::INTEL_COREI7_SKYLAKE_AVX512;
}
break;
// Cannonlake:
case 0x66:
CPU = "cannonlake";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_CANNONLAKE;
break;
// Icelake:
case 0x7d:
case 0x7e:
CPU = "icelake-client";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_ICELAKE_CLIENT;
break;
// Tigerlake:
case 0x8c:
case 0x8d:
CPU = "tigerlake";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_TIGERLAKE;
break;
// Alderlake:
case 0x97:
case 0x9a:
// Gracemont
case 0xbe:
// Raptorlake:
case 0xb7:
case 0xba:
case 0xbf:
// Meteorlake:
case 0xaa:
case 0xac:
CPU = "alderlake";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_ALDERLAKE;
break;
// Arrowlake:
case 0xc5:
CPU = "arrowlake";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_ARROWLAKE;
break;
// Arrowlake S:
case 0xc6:
// Lunarlake:
case 0xbd:
CPU = "arrowlake-s";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_ARROWLAKE_S;
break;
// Pantherlake:
case 0xcc:
CPU = "pantherlake";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_PANTHERLAKE;
break;
// Graniterapids:
case 0xad:
CPU = "graniterapids";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_GRANITERAPIDS;
break;
// Granite Rapids D:
case 0xae:
CPU = "graniterapids-d";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_GRANITERAPIDS_D;
break;
// Icelake Xeon:
case 0x6a:
case 0x6c:
CPU = "icelake-server";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_ICELAKE_SERVER;
break;
// Emerald Rapids:
case 0xcf:
// Sapphire Rapids:
case 0x8f:
CPU = "sapphirerapids";
*Type = X86::INTEL_COREI7;
*Subtype = X86::INTEL_COREI7_SAPPHIRERAPIDS;
break;
case 0x1c: // Most 45 nm Intel Atom processors
case 0x26: // 45 nm Atom Lincroft
case 0x27: // 32 nm Atom Medfield
case 0x35: // 32 nm Atom Midview
case 0x36: // 32 nm Atom Midview
CPU = "bonnell";
*Type = X86::INTEL_BONNELL;
break;
// Atom Silvermont codes from the Intel software optimization guide.
case 0x37:
case 0x4a:
case 0x4d:
case 0x5a:
case 0x5d:
case 0x4c: // really airmont
CPU = "silvermont";
*Type = X86::INTEL_SILVERMONT;
break;
// Goldmont:
case 0x5c: // Apollo Lake
case 0x5f: // Denverton
CPU = "goldmont";
*Type = X86::INTEL_GOLDMONT;
break;
case 0x7a:
CPU = "goldmont-plus";
*Type = X86::INTEL_GOLDMONT_PLUS;
break;
case 0x86:
case 0x8a: // Lakefield
case 0x96: // Elkhart Lake
case 0x9c: // Jasper Lake
CPU = "tremont";
*Type = X86::INTEL_TREMONT;
break;
// Sierraforest:
case 0xaf:
CPU = "sierraforest";
*Type = X86::INTEL_SIERRAFOREST;
break;
// Grandridge:
case 0xb6:
CPU = "grandridge";
*Type = X86::INTEL_GRANDRIDGE;
break;
// Clearwaterforest:
case 0xdd:
CPU = "clearwaterforest";
*Type = X86::INTEL_CLEARWATERFOREST;
break;
// Xeon Phi (Knights Landing + Knights Mill):
case 0x57:
CPU = "knl";
*Type = X86::INTEL_KNL;
break;
case 0x85:
CPU = "knm";
*Type = X86::INTEL_KNM;
break;
default: // Unknown family 6 CPU, try to guess.
// Don't both with Type/Subtype here, they aren't used by the caller.
// They're used above to keep the code in sync with compiler-rt.
// TODO detect tigerlake host from model
if (testFeature(X86::FEATURE_AVX512VP2INTERSECT)) {
CPU = "tigerlake";
} else if (testFeature(X86::FEATURE_AVX512VBMI2)) {
CPU = "icelake-client";
} else if (testFeature(X86::FEATURE_AVX512VBMI)) {
CPU = "cannonlake";
} else if (testFeature(X86::FEATURE_AVX512BF16)) {
CPU = "cooperlake";
} else if (testFeature(X86::FEATURE_AVX512VNNI)) {
CPU = "cascadelake";
} else if (testFeature(X86::FEATURE_AVX512VL)) {
CPU = "skylake-avx512";
} else if (testFeature(X86::FEATURE_AVX512ER)) {
CPU = "knl";
} else if (testFeature(X86::FEATURE_CLFLUSHOPT)) {
if (testFeature(X86::FEATURE_SHA))
CPU = "goldmont";
else
CPU = "skylake";
} else if (testFeature(X86::FEATURE_ADX)) {
CPU = "broadwell";
} else if (testFeature(X86::FEATURE_AVX2)) {
CPU = "haswell";
} else if (testFeature(X86::FEATURE_AVX)) {
CPU = "sandybridge";
} else if (testFeature(X86::FEATURE_SSE4_2)) {
if (testFeature(X86::FEATURE_MOVBE))
CPU = "silvermont";
else
CPU = "nehalem";
} else if (testFeature(X86::FEATURE_SSE4_1)) {
CPU = "penryn";
} else if (testFeature(X86::FEATURE_SSSE3)) {
if (testFeature(X86::FEATURE_MOVBE))
CPU = "bonnell";
else
CPU = "core2";
} else if (testFeature(X86::FEATURE_64BIT)) {
CPU = "core2";