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Defcon/hook_lib/asmjit/core/cpuinfo.cpp

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2023-11-26 08:54:06 -05:00
// This file is part of AsmJit project <https://asmjit.com>
//
// See asmjit.h or LICENSE.md for license and copyright information
// SPDX-License-Identifier: Zlib
#include "../core/api-build_p.h"
#include "../core/cpuinfo.h"
#include "../core/support.h"
#if !defined(_WIN32)
#include <errno.h>
#include <sys/utsname.h>
#include <unistd.h>
#endif
// Required by `getauxval()` on Linux.
#if defined(__linux__)
#include <sys/auxv.h>
#endif
//! Required to detect CPU and features on Apple platforms.
#if defined(__APPLE__)
#include <mach/machine.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#endif
// Required by `__cpuidex()` and `_xgetbv()`.
#if defined(_MSC_VER)
#include <intrin.h>
#endif
ASMJIT_BEGIN_NAMESPACE
// CpuInfo - Detect - HW-Thread Count
// ==================================
#if defined(_WIN32)
static inline uint32_t detectHWThreadCount() noexcept {
SYSTEM_INFO info;
::GetSystemInfo(&info);
return info.dwNumberOfProcessors;
}
#elif defined(_SC_NPROCESSORS_ONLN)
static inline uint32_t detectHWThreadCount() noexcept {
long res = ::sysconf(_SC_NPROCESSORS_ONLN);
return res <= 0 ? uint32_t(1) : uint32_t(res);
}
#else
static inline uint32_t detectHWThreadCount() noexcept {
return 1;
}
#endif
// CpuInfo - Detect - X86
// ======================
#if ASMJIT_ARCH_X86
struct cpuid_t { uint32_t eax, ebx, ecx, edx; };
struct xgetbv_t { uint32_t eax, edx; };
// Executes `cpuid` instruction.
static inline void cpuidQuery(cpuid_t* out, uint32_t inEax, uint32_t inEcx = 0) noexcept {
#if defined(_MSC_VER)
__cpuidex(reinterpret_cast<int*>(out), inEax, inEcx);
#elif defined(__GNUC__) && ASMJIT_ARCH_X86 == 32
__asm__ __volatile__(
"mov %%ebx, %%edi\n"
"cpuid\n"
"xchg %%edi, %%ebx\n" : "=a"(out->eax), "=D"(out->ebx), "=c"(out->ecx), "=d"(out->edx) : "a"(inEax), "c"(inEcx));
#elif defined(__GNUC__) && ASMJIT_ARCH_X86 == 64
__asm__ __volatile__(
"mov %%rbx, %%rdi\n"
"cpuid\n"
"xchg %%rdi, %%rbx\n" : "=a"(out->eax), "=D"(out->ebx), "=c"(out->ecx), "=d"(out->edx) : "a"(inEax), "c"(inEcx));
#else
#error "[asmjit] x86::cpuidQuery() - Unsupported compiler."
#endif
}
// Executes 'xgetbv' instruction.
static inline void xgetbvQuery(xgetbv_t* out, uint32_t inEcx) noexcept {
#if defined(_MSC_VER)
uint64_t value = _xgetbv(inEcx);
out->eax = uint32_t(value & 0xFFFFFFFFu);
out->edx = uint32_t(value >> 32);
#elif defined(__GNUC__)
uint32_t outEax;
uint32_t outEdx;
// Replaced, because the world is not perfect:
// __asm__ __volatile__("xgetbv" : "=a"(outEax), "=d"(outEdx) : "c"(inEcx));
__asm__ __volatile__(".byte 0x0F, 0x01, 0xD0" : "=a"(outEax), "=d"(outEdx) : "c"(inEcx));
out->eax = outEax;
out->edx = outEdx;
#else
out->eax = 0;
out->edx = 0;
#endif
}
// Map a 12-byte vendor string returned by `cpuid` into a `CpuInfo::Vendor` ID.
static inline void simplifyCpuVendor(CpuInfo& cpu, uint32_t d0, uint32_t d1, uint32_t d2) noexcept {
struct Vendor {
char normalized[8];
union { char text[12]; uint32_t d[3]; };
};
static const Vendor table[] = {
{ { 'A', 'M', 'D' }, {{ 'A', 'u', 't', 'h', 'e', 'n', 't', 'i', 'c', 'A', 'M', 'D' }} },
{ { 'I', 'N', 'T', 'E', 'L' }, {{ 'G', 'e', 'n', 'u', 'i', 'n', 'e', 'I', 'n', 't', 'e', 'l' }} },
{ { 'V', 'I', 'A' }, {{ 'C', 'e', 'n', 't', 'a', 'u', 'r', 'H', 'a', 'u', 'l', 's' }} },
{ { 'V', 'I', 'A' }, {{ 'V', 'I', 'A', 0 , 'V', 'I', 'A', 0 , 'V', 'I', 'A', 0 }} },
{ { 'U', 'N', 'K', 'N', 'O', 'W', 'N' }, {{ 0 }} }
};
uint32_t i;
for (i = 0; i < ASMJIT_ARRAY_SIZE(table) - 1; i++)
if (table[i].d[0] == d0 && table[i].d[1] == d1 && table[i].d[2] == d2)
break;
memcpy(cpu._vendor.str, table[i].normalized, 8);
}
static ASMJIT_FAVOR_SIZE void simplifyCpuBrand(char* s) noexcept {
char* d = s;
char c = s[0];
char prev = 0;
// Used to always clear the current character to ensure that the result
// doesn't contain garbage after a new null terminator is placed at the end.
s[0] = '\0';
for (;;) {
if (!c)
break;
if (!(c == ' ' && (prev == '@' || s[1] == ' ' || s[1] == '@'))) {
*d++ = c;
prev = c;
}
c = *++s;
s[0] = '\0';
}
d[0] = '\0';
}
static ASMJIT_FAVOR_SIZE void detectX86Cpu(CpuInfo& cpu) noexcept {
using Support::bitTest;
cpuid_t regs;
xgetbv_t xcr0 { 0, 0 };
CpuFeatures::X86& features = cpu.features().x86();
cpu._wasDetected = true;
cpu._maxLogicalProcessors = 1;
// We are gonna execute CPUID, which was introduced by I486, so it's the requirement.
features.add(CpuFeatures::X86::kI486);
// CPUID EAX=0
// -----------
// Get vendor string/id.
cpuidQuery(&regs, 0x0);
uint32_t maxId = regs.eax;
uint32_t maxSubLeafId_0x7 = 0;
simplifyCpuVendor(cpu, regs.ebx, regs.edx, regs.ecx);
// CPUID EAX=1
// -----------
if (maxId >= 0x1) {
// Get feature flags in ECX/EDX and family/model in EAX.
cpuidQuery(&regs, 0x1);
// Fill family and model fields.
uint32_t modelId = (regs.eax >> 4) & 0x0F;
uint32_t familyId = (regs.eax >> 8) & 0x0F;
// Use extended family and model fields.
if (familyId == 0x06u || familyId == 0x0Fu)
modelId += (((regs.eax >> 16) & 0x0Fu) << 4);
if (familyId == 0x0Fu)
familyId += ((regs.eax >> 20) & 0xFFu);
cpu._modelId = modelId;
cpu._familyId = familyId;
cpu._brandId = ((regs.ebx ) & 0xFF);
cpu._processorType = ((regs.eax >> 12) & 0x03);
cpu._maxLogicalProcessors = ((regs.ebx >> 16) & 0xFF);
cpu._stepping = ((regs.eax ) & 0x0F);
cpu._cacheLineSize = ((regs.ebx >> 8) & 0xFF) * 8;
features.addIf(bitTest(regs.ecx, 0), CpuFeatures::X86::kSSE3);
features.addIf(bitTest(regs.ecx, 1), CpuFeatures::X86::kPCLMULQDQ);
features.addIf(bitTest(regs.ecx, 3), CpuFeatures::X86::kMONITOR);
features.addIf(bitTest(regs.ecx, 5), CpuFeatures::X86::kVMX);
features.addIf(bitTest(regs.ecx, 6), CpuFeatures::X86::kSMX);
features.addIf(bitTest(regs.ecx, 9), CpuFeatures::X86::kSSSE3);
features.addIf(bitTest(regs.ecx, 13), CpuFeatures::X86::kCMPXCHG16B);
features.addIf(bitTest(regs.ecx, 19), CpuFeatures::X86::kSSE4_1);
features.addIf(bitTest(regs.ecx, 20), CpuFeatures::X86::kSSE4_2);
features.addIf(bitTest(regs.ecx, 22), CpuFeatures::X86::kMOVBE);
features.addIf(bitTest(regs.ecx, 23), CpuFeatures::X86::kPOPCNT);
features.addIf(bitTest(regs.ecx, 25), CpuFeatures::X86::kAESNI);
features.addIf(bitTest(regs.ecx, 26), CpuFeatures::X86::kXSAVE);
features.addIf(bitTest(regs.ecx, 27), CpuFeatures::X86::kOSXSAVE);
features.addIf(bitTest(regs.ecx, 30), CpuFeatures::X86::kRDRAND);
features.addIf(bitTest(regs.edx, 0), CpuFeatures::X86::kFPU);
features.addIf(bitTest(regs.edx, 4), CpuFeatures::X86::kRDTSC);
features.addIf(bitTest(regs.edx, 5), CpuFeatures::X86::kMSR);
features.addIf(bitTest(regs.edx, 8), CpuFeatures::X86::kCMPXCHG8B);
features.addIf(bitTest(regs.edx, 15), CpuFeatures::X86::kCMOV);
features.addIf(bitTest(regs.edx, 19), CpuFeatures::X86::kCLFLUSH);
features.addIf(bitTest(regs.edx, 23), CpuFeatures::X86::kMMX);
features.addIf(bitTest(regs.edx, 24), CpuFeatures::X86::kFXSR);
features.addIf(bitTest(regs.edx, 25), CpuFeatures::X86::kSSE);
features.addIf(bitTest(regs.edx, 25), CpuFeatures::X86::kSSE, CpuFeatures::X86::kSSE2);
features.addIf(bitTest(regs.edx, 28), CpuFeatures::X86::kMT);
// Get the content of XCR0 if supported by the CPU and enabled by the OS.
if (features.hasXSAVE() && features.hasOSXSAVE()) {
xgetbvQuery(&xcr0, 0);
}
// Detect AVX+.
if (bitTest(regs.ecx, 28)) {
// - XCR0[2:1] == 11b
// XMM & YMM states need to be enabled by OS.
if ((xcr0.eax & 0x00000006u) == 0x00000006u) {
features.add(CpuFeatures::X86::kAVX);
features.addIf(bitTest(regs.ecx, 12), CpuFeatures::X86::kFMA);
features.addIf(bitTest(regs.ecx, 29), CpuFeatures::X86::kF16C);
}
}
}
constexpr uint32_t kXCR0_AMX_Bits = 0x3u << 17;
bool amxEnabledByOS = (xcr0.eax & kXCR0_AMX_Bits) == kXCR0_AMX_Bits;
#if defined(__APPLE__)
// Apple platform provides on-demand AVX512 support. When an AVX512 instruction is used the first time it results
// in #UD, which would cause the thread being promoted to use AVX512 support by the OS in addition to enabling the
// necessary bits in XCR0 register.
bool avx512EnabledByOS = true;
#else
// - XCR0[2:1] == 11b - XMM/YMM states need to be enabled by OS.
// - XCR0[7:5] == 111b - Upper 256-bit of ZMM0-XMM15 and ZMM16-ZMM31 need to be enabled by OS.
constexpr uint32_t kXCR0_AVX512_Bits = (0x3u << 1) | (0x7u << 5);
bool avx512EnabledByOS = (xcr0.eax & kXCR0_AVX512_Bits) == kXCR0_AVX512_Bits;
#endif
// CPUID EAX=7 ECX=0
// -----------------
// Detect new features if the processor supports CPUID-07.
bool maybeMPX = false;
if (maxId >= 0x7) {
cpuidQuery(&regs, 0x7);
maybeMPX = bitTest(regs.ebx, 14);
maxSubLeafId_0x7 = regs.eax;
features.addIf(bitTest(regs.ebx, 0), CpuFeatures::X86::kFSGSBASE);
features.addIf(bitTest(regs.ebx, 3), CpuFeatures::X86::kBMI);
features.addIf(bitTest(regs.ebx, 4), CpuFeatures::X86::kHLE);
features.addIf(bitTest(regs.ebx, 7), CpuFeatures::X86::kSMEP);
features.addIf(bitTest(regs.ebx, 8), CpuFeatures::X86::kBMI2);
features.addIf(bitTest(regs.ebx, 9), CpuFeatures::X86::kERMS);
features.addIf(bitTest(regs.ebx, 11), CpuFeatures::X86::kRTM);
features.addIf(bitTest(regs.ebx, 18), CpuFeatures::X86::kRDSEED);
features.addIf(bitTest(regs.ebx, 19), CpuFeatures::X86::kADX);
features.addIf(bitTest(regs.ebx, 20), CpuFeatures::X86::kSMAP);
features.addIf(bitTest(regs.ebx, 23), CpuFeatures::X86::kCLFLUSHOPT);
features.addIf(bitTest(regs.ebx, 24), CpuFeatures::X86::kCLWB);
features.addIf(bitTest(regs.ebx, 29), CpuFeatures::X86::kSHA);
features.addIf(bitTest(regs.ecx, 0), CpuFeatures::X86::kPREFETCHWT1);
features.addIf(bitTest(regs.ecx, 4), CpuFeatures::X86::kOSPKE);
features.addIf(bitTest(regs.ecx, 5), CpuFeatures::X86::kWAITPKG);
features.addIf(bitTest(regs.ecx, 7), CpuFeatures::X86::kCET_SS);
features.addIf(bitTest(regs.ecx, 8), CpuFeatures::X86::kGFNI);
features.addIf(bitTest(regs.ecx, 9), CpuFeatures::X86::kVAES);
features.addIf(bitTest(regs.ecx, 10), CpuFeatures::X86::kVPCLMULQDQ);
features.addIf(bitTest(regs.ecx, 22), CpuFeatures::X86::kRDPID);
features.addIf(bitTest(regs.ecx, 25), CpuFeatures::X86::kCLDEMOTE);
features.addIf(bitTest(regs.ecx, 27), CpuFeatures::X86::kMOVDIRI);
features.addIf(bitTest(regs.ecx, 28), CpuFeatures::X86::kMOVDIR64B);
features.addIf(bitTest(regs.ecx, 29), CpuFeatures::X86::kENQCMD);
features.addIf(bitTest(regs.edx, 4), CpuFeatures::X86::kFSRM);
features.addIf(bitTest(regs.edx, 5), CpuFeatures::X86::kUINTR);
features.addIf(bitTest(regs.edx, 14), CpuFeatures::X86::kSERIALIZE);
features.addIf(bitTest(regs.edx, 16), CpuFeatures::X86::kTSXLDTRK);
features.addIf(bitTest(regs.edx, 18), CpuFeatures::X86::kPCONFIG);
features.addIf(bitTest(regs.edx, 20), CpuFeatures::X86::kCET_IBT);
// Detect 'TSX' - Requires at least one of `HLE` and `RTM` features.
if (features.hasHLE() || features.hasRTM()) {
features.add(CpuFeatures::X86::kTSX);
}
if (bitTest(regs.ebx, 5) && features.hasAVX()) {
features.add(CpuFeatures::X86::kAVX2);
}
if (avx512EnabledByOS && bitTest(regs.ebx, 16)) {
features.add(CpuFeatures::X86::kAVX512_F);
features.addIf(bitTest(regs.ebx, 17), CpuFeatures::X86::kAVX512_DQ);
features.addIf(bitTest(regs.ebx, 21), CpuFeatures::X86::kAVX512_IFMA);
features.addIf(bitTest(regs.ebx, 26), CpuFeatures::X86::kAVX512_PFI);
features.addIf(bitTest(regs.ebx, 27), CpuFeatures::X86::kAVX512_ERI);
features.addIf(bitTest(regs.ebx, 28), CpuFeatures::X86::kAVX512_CDI);
features.addIf(bitTest(regs.ebx, 30), CpuFeatures::X86::kAVX512_BW);
features.addIf(bitTest(regs.ebx, 31), CpuFeatures::X86::kAVX512_VL);
features.addIf(bitTest(regs.ecx, 1), CpuFeatures::X86::kAVX512_VBMI);
features.addIf(bitTest(regs.ecx, 6), CpuFeatures::X86::kAVX512_VBMI2);
features.addIf(bitTest(regs.ecx, 11), CpuFeatures::X86::kAVX512_VNNI);
features.addIf(bitTest(regs.ecx, 12), CpuFeatures::X86::kAVX512_BITALG);
features.addIf(bitTest(regs.ecx, 14), CpuFeatures::X86::kAVX512_VPOPCNTDQ);
features.addIf(bitTest(regs.edx, 2), CpuFeatures::X86::kAVX512_4VNNIW);
features.addIf(bitTest(regs.edx, 3), CpuFeatures::X86::kAVX512_4FMAPS);
features.addIf(bitTest(regs.edx, 8), CpuFeatures::X86::kAVX512_VP2INTERSECT);
features.addIf(bitTest(regs.edx, 23), CpuFeatures::X86::kAVX512_FP16);
}
if (amxEnabledByOS) {
features.addIf(bitTest(regs.edx, 22), CpuFeatures::X86::kAMX_BF16);
features.addIf(bitTest(regs.edx, 24), CpuFeatures::X86::kAMX_TILE);
features.addIf(bitTest(regs.edx, 25), CpuFeatures::X86::kAMX_INT8);
}
}
// CPUID EAX=7 ECX=1
// -----------------
if (maxSubLeafId_0x7 >= 1) {
cpuidQuery(&regs, 0x7, 1);
features.addIf(bitTest(regs.eax, 3), CpuFeatures::X86::kRAO_INT);
features.addIf(bitTest(regs.eax, 7), CpuFeatures::X86::kCMPCCXADD);
features.addIf(bitTest(regs.eax, 10), CpuFeatures::X86::kFZRM);
features.addIf(bitTest(regs.eax, 11), CpuFeatures::X86::kFSRS);
features.addIf(bitTest(regs.eax, 12), CpuFeatures::X86::kFSRC);
features.addIf(bitTest(regs.eax, 19), CpuFeatures::X86::kWRMSRNS);
features.addIf(bitTest(regs.eax, 22), CpuFeatures::X86::kHRESET);
features.addIf(bitTest(regs.eax, 26), CpuFeatures::X86::kLAM);
features.addIf(bitTest(regs.eax, 27), CpuFeatures::X86::kMSRLIST);
features.addIf(bitTest(regs.edx, 14), CpuFeatures::X86::kPREFETCHI);
features.addIf(bitTest(regs.edx, 18), CpuFeatures::X86::kCET_SSS);
if (features.hasAVX2()) {
features.addIf(bitTest(regs.eax, 4), CpuFeatures::X86::kAVX_VNNI);
features.addIf(bitTest(regs.eax, 23), CpuFeatures::X86::kAVX_IFMA);
features.addIf(bitTest(regs.edx, 4), CpuFeatures::X86::kAVX_VNNI_INT8);
features.addIf(bitTest(regs.edx, 5), CpuFeatures::X86::kAVX_NE_CONVERT);
}
if (features.hasAVX512_F()) {
features.addIf(bitTest(regs.eax, 5), CpuFeatures::X86::kAVX512_BF16);
}
if (amxEnabledByOS) {
features.addIf(bitTest(regs.eax, 21), CpuFeatures::X86::kAMX_FP16);
}
}
// CPUID EAX=13 ECX=0
// ------------------
if (maxId >= 0xD) {
cpuidQuery(&regs, 0xD, 0);
// Both CPUID result and XCR0 has to be enabled to have support for MPX.
if (((regs.eax & xcr0.eax) & 0x00000018u) == 0x00000018u && maybeMPX)
features.add(CpuFeatures::X86::kMPX);
cpuidQuery(&regs, 0xD, 1);
features.addIf(bitTest(regs.eax, 0), CpuFeatures::X86::kXSAVEOPT);
features.addIf(bitTest(regs.eax, 1), CpuFeatures::X86::kXSAVEC);
features.addIf(bitTest(regs.eax, 3), CpuFeatures::X86::kXSAVES);
}
// CPUID EAX=14 ECX=0
// ------------------
if (maxId >= 0xE) {
cpuidQuery(&regs, 0xE, 0);
features.addIf(bitTest(regs.ebx, 4), CpuFeatures::X86::kPTWRITE);
}
// CPUID EAX=0x80000000...maxId
// ----------------------------
maxId = 0x80000000u;
uint32_t i = maxId;
// The highest EAX that we understand.
constexpr uint32_t kHighestProcessedEAX = 0x8000001Fu;
// Several CPUID calls are required to get the whole branc string. It's easier
// to copy one DWORD at a time instead of copying the string a byte by byte.
uint32_t* brand = cpu._brand.u32;
do {
cpuidQuery(&regs, i);
switch (i) {
case 0x80000000u:
maxId = Support::min<uint32_t>(regs.eax, kHighestProcessedEAX);
break;
case 0x80000001u:
features.addIf(bitTest(regs.ecx, 0), CpuFeatures::X86::kLAHFSAHF);
features.addIf(bitTest(regs.ecx, 2), CpuFeatures::X86::kSVM);
features.addIf(bitTest(regs.ecx, 5), CpuFeatures::X86::kLZCNT);
features.addIf(bitTest(regs.ecx, 6), CpuFeatures::X86::kSSE4A);
features.addIf(bitTest(regs.ecx, 7), CpuFeatures::X86::kMSSE);
features.addIf(bitTest(regs.ecx, 8), CpuFeatures::X86::kPREFETCHW);
features.addIf(bitTest(regs.ecx, 12), CpuFeatures::X86::kSKINIT);
features.addIf(bitTest(regs.ecx, 15), CpuFeatures::X86::kLWP);
features.addIf(bitTest(regs.ecx, 21), CpuFeatures::X86::kTBM);
features.addIf(bitTest(regs.ecx, 29), CpuFeatures::X86::kMONITORX);
features.addIf(bitTest(regs.edx, 20), CpuFeatures::X86::kNX);
features.addIf(bitTest(regs.edx, 21), CpuFeatures::X86::kFXSROPT);
features.addIf(bitTest(regs.edx, 22), CpuFeatures::X86::kMMX2);
features.addIf(bitTest(regs.edx, 27), CpuFeatures::X86::kRDTSCP);
features.addIf(bitTest(regs.edx, 29), CpuFeatures::X86::kPREFETCHW);
features.addIf(bitTest(regs.edx, 30), CpuFeatures::X86::k3DNOW2, CpuFeatures::X86::kMMX2);
features.addIf(bitTest(regs.edx, 31), CpuFeatures::X86::kPREFETCHW);
if (features.hasAVX()) {
features.addIf(bitTest(regs.ecx, 11), CpuFeatures::X86::kXOP);
features.addIf(bitTest(regs.ecx, 16), CpuFeatures::X86::kFMA4);
}
// This feature seems to be only supported by AMD.
if (cpu.isVendor("AMD")) {
features.addIf(bitTest(regs.ecx, 4), CpuFeatures::X86::kALTMOVCR8);
}
break;
case 0x80000002u:
case 0x80000003u:
case 0x80000004u:
*brand++ = regs.eax;
*brand++ = regs.ebx;
*brand++ = regs.ecx;
*brand++ = regs.edx;
// Go directly to the next one we are interested in.
if (i == 0x80000004u)
i = 0x80000008u - 1;
break;
case 0x80000008u:
features.addIf(bitTest(regs.ebx, 0), CpuFeatures::X86::kCLZERO);
features.addIf(bitTest(regs.ebx, 0), CpuFeatures::X86::kRDPRU);
features.addIf(bitTest(regs.ebx, 8), CpuFeatures::X86::kMCOMMIT);
features.addIf(bitTest(regs.ebx, 9), CpuFeatures::X86::kWBNOINVD);
// Go directly to the next one we are interested in.
i = 0x8000001Fu - 1;
break;
case 0x8000001Fu:
features.addIf(bitTest(regs.eax, 4), CpuFeatures::X86::kSNP);
break;
}
} while (++i <= maxId);
// Simplify CPU brand string a bit by removing some unnecessary spaces.
simplifyCpuBrand(cpu._brand.str);
}
#endif // ASMJIT_ARCH_X86
// CpuInfo - Detect - ARM
// ======================
// The most relevant and accurate information can be found here:
// https://github.com/llvm-project/llvm/blob/master/lib/Target/AArch64/AArch64.td
// https://github.com/apple/llvm-project/blob/apple/main/llvm/lib/Target/AArch64/AArch64.td (Apple fork)
//
// Other resources:
// https://en.wikipedia.org/wiki/AArch64
// https://en.wikipedia.org/wiki/Apple_silicon#List_of_Apple_processors
// https://developer.arm.com/architectures/learn-the-architecture/understanding-the-armv8-x-extensions/single-page
#if ASMJIT_ARCH_ARM
static inline void populateBaseARMFeatures(CpuInfo& cpu) noexcept {
#if ASMJIT_ARCH_ARM == 32
// No baseline flags at the moment.
DebugUtils::unused(cpu);
#else
// AArch64 is based on ARMv8-A and later.
cpu.addFeature(CpuFeatures::ARM::kARMv6);
cpu.addFeature(CpuFeatures::ARM::kARMv7);
cpu.addFeature(CpuFeatures::ARM::kARMv8a);
// AArch64 comes with these features by default.
cpu.addFeature(CpuFeatures::ARM::kVFPv2);
cpu.addFeature(CpuFeatures::ARM::kVFPv3);
cpu.addFeature(CpuFeatures::ARM::kVFPv4);
cpu.addFeature(CpuFeatures::ARM::kASIMD);
cpu.addFeature(CpuFeatures::ARM::kIDIVA);
#endif
}
// Detects ARM version by macros defined at compile time. This means that AsmJit will report features forced at
// compile time that should always be provided by the target CPU. This also means that if we don't provide any
// means to detect CPU features the features reported by AsmJit will at least not report less features than the
// target it was compiled to.
ASMJIT_MAYBE_UNUSED
static ASMJIT_FAVOR_SIZE void detectARMFeaturesViaCompilerFlags(CpuInfo& cpu) noexcept {
DebugUtils::unused(cpu);
#if ASMJIT_ARCH_ARM == 32
// ARM targets have no baseline at the moment.
# if defined(__ARM_ARCH_7A__)
cpu.addFeature(CpuFeatures::ARM::kARMv7);
# endif
# if defined(__ARM_ARCH_8A__)
cpu.addFeature(CpuFeatures::ARM::kARMv8a);
# endif
# if defined(__TARGET_ARCH_THUMB)
cpu.addFeature(CpuFeatures::ARM::kTHUMB);
# if __TARGET_ARCH_THUMB >= 4
cpu.addFeature(CpuFeatures::ARM::kTHUMBv2);
# endif
# endif
# if defined(__ARM_FEATURE_FMA)
cpu.addFeature(CpuFeatures::ARM::kVFPv3);
cpu.addFeature(CpuFeatures::ARM::kVFPv4);
# endif
# if defined(__ARM_NEON)
cpu.addFeature(CpuFeatures::ARM::kASIMD);
# endif
# if defined(__ARM_FEATURE_IDIV) && defined(__TARGET_ARCH_THUMB)
cpu.addFeature(CpuFeatures::ARM::kIDIVT);
#endif
# if defined(__ARM_FEATURE_IDIV) && !defined(__TARGET_ARCH_THUMB)
cpu.addFeature(CpuFeatures::ARM::kIDIVA);
# endif
#endif
#if defined(__ARM_ARCH_8_1A__)
cpu.addFeature(CpuFeatures::ARM::kARMv8_1a);
#endif
#if defined(__ARM_ARCH_8_2A__)
cpu.addFeature(CpuFeatures::ARM::kARMv8_2a);
#endif
#if defined(__ARM_ARCH_8_3A__)
cpu.addFeature(CpuFeatures::ARM::kARMv8_3a);
#endif
#if defined(__ARM_ARCH_8_4A__)
cpu.addFeature(CpuFeatures::ARM::kARMv8_4a);
#endif
#if defined(__ARM_ARCH_8_5A__)
cpu.addFeature(CpuFeatures::ARM::kARMv8_5a);
#endif
#if defined(__ARM_ARCH_8_6A__)
cpu.addFeature(CpuFeatures::ARM::kARMv8_6a);
#endif
#if defined(__ARM_ARCH_8_7A__)
cpu.addFeature(CpuFeatures::ARM::kARMv8_7a);
#endif
#if defined(__ARM_FEATURE_AES)
cpu.addFeature(CpuFeatures::ARM::kAES);
#endif
#if defined(__ARM_FEATURE_BF16_SCALAR_ARITHMETIC) && defined(__ARM_FEATURE_BF16_VECTOR_ARITHMETIC)
cpu.addFeature(CpuFeatures::ARM::kBF16);
#endif
#if defined(__ARM_FEATURE_CRC32)
cpu.addFeature(CpuFeatures::ARM::kCRC32);
#endif
#if defined(__ARM_FEATURE_CRYPTO)
cpu.addFeature(CpuFeatures::ARM::kAES,
CpuFeatures::ARM::kSHA1,
CpuFeatures::ARM::kSHA2);
#endif
#if defined(__ARM_FEATURE_DOTPROD)
cpu.addFeature(CpuFeatures::ARM::kDOTPROD);
#endif
#if defined(__ARM_FEATURE_FP16FML) || defined(__ARM_FEATURE_FP16_FML)
cpu.addFeature(CpuFeatures::ARM::kFP16FML);
#endif
#if defined(__ARM_FEATURE_FP16_SCALAR_ARITHMETIC)
cpu.addFeature(CpuFeatures::ARM::kFP16FULL);
#endif
#if defined(__ARM_FEATURE_FRINT)
cpu.addFeature(CpuFeatures::ARM::kFRINT);
#endif
#if defined(__ARM_FEATURE_JCVT)
cpu.addFeature(CpuFeatures::ARM::kFJCVTZS);
#endif
#if defined(__ARM_FEATURE_MATMUL_INT8)
cpu.addFeature(CpuFeatures::ARM::kI8MM);
#endif
#if defined(__ARM_FEATURE_ATOMICS)
cpu.addFeature(CpuFeatures::ARM::kLSE);
#endif
#if defined(__ARM_FEATURE_MEMORY_TAGGING)
cpu.addFeature(CpuFeatures::ARM::kMTE);
#endif
#if defined(__ARM_FEATURE_QRDMX)
cpu.addFeature(CpuFeatures::ARM::kRDM);
#endif
#if defined(__ARM_FEATURE_RNG)
cpu.addFeature(CpuFeatures::ARM::kRNG);
#endif
#if defined(__ARM_FEATURE_SHA2)
cpu.addFeature(CpuFeatures::ARM::kSHA2);
#endif
#if defined(__ARM_FEATURE_SHA3)
cpu.addFeature(CpuFeatures::ARM::kSHA3);
#endif
#if defined(__ARM_FEATURE_SHA512)
cpu.addFeature(CpuFeatures::ARM::kSHA512);
#endif
#if defined(__ARM_FEATURE_SM3)
cpu.addFeature(CpuFeatures::ARM::kSM3);
#endif
#if defined(__ARM_FEATURE_SM4)
cpu.addFeature(CpuFeatures::ARM::kSM4);
#endif
#if defined(__ARM_FEATURE_SVE) || defined(__ARM_FEATURE_SVE_VECTOR_OPERATORS)
cpu.addFeature(CpuFeatures::ARM::kSVE);
#endif
#if defined(__ARM_FEATURE_SVE_MATMUL_INT8)
cpu.addFeature(CpuFeatures::ARM::kSVE_I8MM);
#endif
#if defined(__ARM_FEATURE_SVE_MATMUL_FP32)
cpu.addFeature(CpuFeatures::ARM::kSVE_F32MM);
#endif
#if defined(__ARM_FEATURE_SVE_MATMUL_FP64)
cpu.addFeature(CpuFeatures::ARM::kSVE_F64MM);
#endif
#if defined(__ARM_FEATURE_SVE2)
cpu.addFeature(CpuFeatures::ARM::kSVE2);
#endif
#if defined(__ARM_FEATURE_SVE2_AES)
cpu.addFeature(CpuFeatures::ARM::kSVE2_AES);
#endif
#if defined(__ARM_FEATURE_SVE2_BITPERM)
cpu.addFeature(CpuFeatures::ARM::kSVE2_BITPERM);
#endif
#if defined(__ARM_FEATURE_SVE2_SHA3)
cpu.addFeature(CpuFeatures::ARM::kSVE2_SHA3);
#endif
#if defined(__ARM_FEATURE_SVE2_SM4)
cpu.addFeature(CpuFeatures::ARM::kSVE2_SM4);
#endif
#if defined(__ARM_FEATURE_TME)
cpu.addFeature(CpuFeatures::ARM::kTME);
#endif
}
ASMJIT_MAYBE_UNUSED
static ASMJIT_FAVOR_SIZE void expandARMFeaturesByVersion(CpuInfo& cpu) noexcept {
CpuFeatures::ARM& features = cpu.features().arm();
if (features.hasARMv8_7a()) {
features.add(CpuFeatures::ARM::kARMv8_6a);
}
if (features.hasARMv8_6a()) {
features.add(CpuFeatures::ARM::kARMv8_5a,
CpuFeatures::ARM::kBF16);
if (features.hasSVE())
features.add(CpuFeatures::ARM::kSVE_I8MM);
}
if (features.hasARMv8_5a()) {
features.add(CpuFeatures::ARM::kARMv8_4a,
CpuFeatures::ARM::kALTNZCV,
CpuFeatures::ARM::kBTI,
CpuFeatures::ARM::kFRINT,
CpuFeatures::ARM::kSB,
CpuFeatures::ARM::kSSBS);
}
if (features.hasARMv8_4a()) {
features.add(CpuFeatures::ARM::kARMv8_3a,
CpuFeatures::ARM::kDIT,
CpuFeatures::ARM::kDOTPROD,
CpuFeatures::ARM::kFLAGM,
CpuFeatures::ARM::kPMU,
CpuFeatures::ARM::kRCPC_IMMO);
}
if (features.hasARMv8_3a()) {
features.add(CpuFeatures::ARM::kARMv8_2a,
CpuFeatures::ARM::kFCMA,
CpuFeatures::ARM::kFJCVTZS);
}
if (features.hasARMv8_2a()) {
features.add(CpuFeatures::ARM::kARMv8_1a);
}
if (features.hasARMv8_1a()) {
features.add(CpuFeatures::ARM::kARMv8a,
CpuFeatures::ARM::kCRC32,
CpuFeatures::ARM::kLSE,
CpuFeatures::ARM::kRDM);
}
if (features.hasARMv8a()) {
features.add(CpuFeatures::ARM::kARMv7,
CpuFeatures::ARM::kVFPv2,
CpuFeatures::ARM::kVFPv3,
CpuFeatures::ARM::kVFPv4,
CpuFeatures::ARM::kVFP_D32,
CpuFeatures::ARM::kASIMD,
CpuFeatures::ARM::kIDIVA);
}
}
// CpuInfo - Detect - ARM [Windows]
// ================================
#if defined(_WIN32)
struct WinPFPMapping {
uint8_t featureId;
uint8_t pfpFeatureId;
};
static ASMJIT_FAVOR_SIZE void detectPFPFeatures(CpuInfo& cpu, const WinPFPMapping* mapping, size_t size) noexcept {
for (size_t i = 0; i < size; i++)
if (::IsProcessorFeaturePresent(mapping[i].pfpFeatureId))
cpu.addFeature(mapping[i].featureId);
}
//! Detect ARM CPU features on Windows.
//!
//! The detection is based on `IsProcessorFeaturePresent()` API call.
static ASMJIT_FAVOR_SIZE void detectARMCpu(CpuInfo& cpu) noexcept {
cpu._wasDetected = true;
populateBaseARMFeatures(cpu);
CpuFeatures::ARM& features = cpu.features().arm();
// Win32 for ARM requires ARMv7 with DSP extensions, VFPv3, and uses THUMBv2 by default.
#if ASMJIT_ARCH_ARM == 32
features.add(CpuFeatures::ARM::kTHUMB);
features.add(CpuFeatures::ARM::kTHUMBv2);
features.add(CpuFeatures::ARM::kARMv6);
features.add(CpuFeatures::ARM::kARMv7);
features.add(CpuFeatures::ARM::kEDSP);
features.add(CpuFeatures::ARM::kVFPv2);
features.add(CpuFeatures::ARM::kVFPv3);
#endif
// Windows for ARM requires ASIMD.
features.add(CpuFeatures::ARM::kASIMD);
// Detect additional CPU features by calling `IsProcessorFeaturePresent()`.
static const WinPFPMapping mapping[] = {
#if ASMJIT_ARCH_ARM == 32
{ uint8_t(CpuFeatures::ARM::kVFP_D32) , 18 }, // PF_ARM_VFP_32_REGISTERS_AVAILABLE
{ uint8_t(CpuFeatures::ARM::kIDIVT) , 24 }, // PF_ARM_DIVIDE_INSTRUCTION_AVAILABLE
{ uint8_t(CpuFeatures::ARM::kVFPv4) , 27 }, // PF_ARM_FMAC_INSTRUCTIONS_AVAILABLE
{ uint8_t(CpuFeatures::ARM::kARMv8a) , 29 }, // PF_ARM_V8_INSTRUCTIONS_AVAILABLE
#endif
{ uint8_t(CpuFeatures::ARM::kAES) , 30 }, // PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE
{ uint8_t(CpuFeatures::ARM::kCRC32) , 31 }, // PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE
{ uint8_t(CpuFeatures::ARM::kLSE) , 34 } // PF_ARM_V81_ATOMIC_INSTRUCTIONS_AVAILABLE
};
detectPFPFeatures(cpu, mapping, ASMJIT_ARRAY_SIZE(mapping));
// Windows provides several instructions under a single flag:
if (features.hasAES()) {
features.add(CpuFeatures::ARM::kSHA1,
CpuFeatures::ARM::kSHA2);
}
expandARMFeaturesByVersion(cpu);
}
// CpuInfo - Detect - ARM [Linux]
// ==============================
#elif defined(__linux__)
struct LinuxHWCapMapping {
uint8_t featureId;
uint8_t hwCapBit;
};
static ASMJIT_FAVOR_SIZE void detectHWCaps(CpuInfo& cpu, unsigned long type, const LinuxHWCapMapping* mapping, size_t size) noexcept {
unsigned long mask = getauxval(type);
for (size_t i = 0; i < size; i++)
cpu.features().addIf(Support::bitTest(mask, mapping[i].hwCapBit), mapping[i].featureId);
}
#if ASMJIT_ARCH_ARM == 32
// `AT_HWCAP` provides ARMv7 (and less) related flags.
static const LinuxHWCapMapping hwCapMapping[] = {
{ uint8_t(CpuFeatures::ARM::kVFPv2) , 6 }, // HWCAP_VFP
{ uint8_t(CpuFeatures::ARM::kEDSP) , 7 }, // HWCAP_EDSP
{ uint8_t(CpuFeatures::ARM::kASIMD) , 12 }, // HWCAP_NEON
{ uint8_t(CpuFeatures::ARM::kVFPv3) , 13 }, // HWCAP_VFPv3
{ uint8_t(CpuFeatures::ARM::kVFPv4) , 16 }, // HWCAP_VFPv4
{ uint8_t(CpuFeatures::ARM::kIDIVA) , 17 }, // HWCAP_IDIVA
{ uint8_t(CpuFeatures::ARM::kIDIVT) , 18 }, // HWCAP_IDIVT
{ uint8_t(CpuFeatures::ARM::kVFP_D32) , 19 } // HWCAP_VFPD32
};
// `AT_HWCAP2` provides ARMv8+ related flags.
static const LinuxHWCapMapping hwCap2Mapping[] = {
{ uint8_t(CpuFeatures::ARM::kAES) , 0 }, // HWCAP2_AES
{ uint8_t(CpuFeatures::ARM::kPMULL) , 1 }, // HWCAP2_PMULL
{ uint8_t(CpuFeatures::ARM::kSHA1) , 2 }, // HWCAP2_SHA1
{ uint8_t(CpuFeatures::ARM::kSHA2) , 3 }, // HWCAP2_SHA2
{ uint8_t(CpuFeatures::ARM::kCRC32) , 4 } // HWCAP2_CRC32
};
static ASMJIT_FAVOR_SIZE void detectARMCpu(CpuInfo& cpu) noexcept {
cpu._wasDetected = true;
populateBaseARMFeatures(cpu);
CpuFeatures::ARM& features = cpu.features().arm();
detectHWCaps(cpu, AT_HWCAP, hwCapMapping, ASMJIT_ARRAY_SIZE(hwCapMapping));
detectHWCaps(cpu, AT_HWCAP2, hwCap2Mapping, ASMJIT_ARRAY_SIZE(hwCap2Mapping));
// VFPv3 implies VFPv2.
if (features.hasVFPv3())
features.add(CpuFeatures::ARM::kVFPv2);
// VFPv2 implies ARMv6.
if (features.hasVFPv2())
features.add(CpuFeatures::ARM::kARMv6);
// ARMv7 provides VFPv3|ASIMD.
if (features.hasVFPv3() || features.hasASIMD())
features.add(CpuFeatures::ARM::kARMv7);
// ARMv8 provives AES, CRC32, PMULL, SHA1, and SHA2.
if (features.hasAES() || features.hasCRC32() || features.hasPMULL() || features.hasSHA1() || features.hasSHA2())
features.add(CpuFeatures::ARM::kARMv8a);
}
#else
// `AT_HWCAP` provides ARMv8+ related flags.
static const LinuxHWCapMapping hwCapMapping[] = {
/*
{ uint8_t(CpuFeatures::ARM::k) , 0 }, // HWCAP_FP
*/
{ uint8_t(CpuFeatures::ARM::kASIMD) , 1 }, // HWCAP_ASIMD
/*
{ uint8_t(CpuFeatures::ARM::k) , 2 }, // HWCAP_EVTSTRM
*/
{ uint8_t(CpuFeatures::ARM::kAES) , 3 }, // HWCAP_AES
{ uint8_t(CpuFeatures::ARM::kPMULL) , 4 }, // HWCAP_PMULL
{ uint8_t(CpuFeatures::ARM::kSHA1) , 5 }, // HWCAP_SHA1
{ uint8_t(CpuFeatures::ARM::kSHA2) , 6 }, // HWCAP_SHA2
{ uint8_t(CpuFeatures::ARM::kCRC32) , 7 }, // HWCAP_CRC32
{ uint8_t(CpuFeatures::ARM::kLSE) , 8 }, // HWCAP_ATOMICS
{ uint8_t(CpuFeatures::ARM::kFP16CONV) , 9 }, // HWCAP_FPHP
{ uint8_t(CpuFeatures::ARM::kFP16FULL) , 10 }, // HWCAP_ASIMDHP
{ uint8_t(CpuFeatures::ARM::kCPUID) , 11 }, // HWCAP_CPUID
{ uint8_t(CpuFeatures::ARM::kRDM) , 12 }, // HWCAP_ASIMDRDM
{ uint8_t(CpuFeatures::ARM::kFJCVTZS) , 13 }, // HWCAP_JSCVT
{ uint8_t(CpuFeatures::ARM::kFCMA) , 14 }, // HWCAP_FCMA
/*
{ uint8_t(CpuFeatures::ARM::k) , 15 }, // HWCAP_LRCPC
{ uint8_t(CpuFeatures::ARM::k) , 16 }, // HWCAP_DCPOP
*/
{ uint8_t(CpuFeatures::ARM::kSHA3) , 17 }, // HWCAP_SHA3
{ uint8_t(CpuFeatures::ARM::kSM3) , 18 }, // HWCAP_SM3
{ uint8_t(CpuFeatures::ARM::kSM4) , 19 }, // HWCAP_SM4
{ uint8_t(CpuFeatures::ARM::kDOTPROD) , 20 }, // HWCAP_ASIMDDP
{ uint8_t(CpuFeatures::ARM::kSHA512) , 21 }, // HWCAP_SHA512
{ uint8_t(CpuFeatures::ARM::kSVE) , 22 }, // HWCAP_SVE
{ uint8_t(CpuFeatures::ARM::kFP16FML) , 23 }, // HWCAP_ASIMDFHM
{ uint8_t(CpuFeatures::ARM::kDIT) , 24 }, // HWCAP_DIT
/*
{ uint8_t(CpuFeatures::ARM::k) , 25 }, // HWCAP_USCAT
{ uint8_t(CpuFeatures::ARM::k) , 26 }, // HWCAP_ILRCPC
*/
{ uint8_t(CpuFeatures::ARM::kFLAGM) , 27 }, // HWCAP_FLAGM
{ uint8_t(CpuFeatures::ARM::kSSBS) , 28 }, // HWCAP_SSBS
{ uint8_t(CpuFeatures::ARM::kSB) , 29 } // HWCAP_SB
/*
{ uint8_t(CpuFeatures::ARM::k) , 30 }, // HWCAP_PACA
{ uint8_t(CpuFeatures::ARM::k) , 31 } // HWCAP_PACG
*/
};
// `AT_HWCAP2` provides ARMv8+ related flags.
static const LinuxHWCapMapping hwCapMapping2[] = {
/*
{ uint8_t(CpuFeatures::ARM::k) , 0 }, // HWCAP2_DCPODP
*/
{ uint8_t(CpuFeatures::ARM::kSVE2) , 1 }, // HWCAP2_SVE2
{ uint8_t(CpuFeatures::ARM::kSVE2_AES) , 2 }, // HWCAP2_SVEAES
{ uint8_t(CpuFeatures::ARM::kSVE_PMULL) , 3 }, // HWCAP2_SVEPMULL
{ uint8_t(CpuFeatures::ARM::kSVE2_BITPERM), 4 }, // HWCAP2_SVEBITPERM
{ uint8_t(CpuFeatures::ARM::kSVE2_SHA3) , 5 }, // HWCAP2_SVESHA3
{ uint8_t(CpuFeatures::ARM::kSVE2_SM4) , 6 }, // HWCAP2_SVESM4
{ uint8_t(CpuFeatures::ARM::kALTNZCV) , 7 }, // HWCAP2_FLAGM2
{ uint8_t(CpuFeatures::ARM::kFRINT) , 8 }, // HWCAP2_FRINT
{ uint8_t(CpuFeatures::ARM::kSVE_I8MM) , 9 }, // HWCAP2_SVEI8MM
{ uint8_t(CpuFeatures::ARM::kSVE_F32MM) , 10 }, // HWCAP2_SVEF32MM
{ uint8_t(CpuFeatures::ARM::kSVE_F64MM) , 11 }, // HWCAP2_SVEF64MM
{ uint8_t(CpuFeatures::ARM::kSVE_BF16) , 12 }, // HWCAP2_SVEBF16
{ uint8_t(CpuFeatures::ARM::kI8MM) , 13 }, // HWCAP2_I8MM
{ uint8_t(CpuFeatures::ARM::kBF16) , 14 }, // HWCAP2_BF16
{ uint8_t(CpuFeatures::ARM::kDGH) , 15 }, // HWCAP2_DGH
{ uint8_t(CpuFeatures::ARM::kRNG) , 16 }, // HWCAP2_RNG
{ uint8_t(CpuFeatures::ARM::kBTI) , 17 }, // HWCAP2_BTI
{ uint8_t(CpuFeatures::ARM::kMTE) , 18 } // HWCAP2_MTE
};
static ASMJIT_FAVOR_SIZE void detectARMCpu(CpuInfo& cpu) noexcept {
cpu._wasDetected = true;
populateBaseARMFeatures(cpu);
detectHWCaps(cpu, AT_HWCAP, hwCapMapping, ASMJIT_ARRAY_SIZE(hwCapMapping));
detectHWCaps(cpu, AT_HWCAP2, hwCapMapping2, ASMJIT_ARRAY_SIZE(hwCapMapping2));
}
#endif
// CpuInfo - Detect - ARM [Apple]
// ==============================
#elif defined(__APPLE__)
namespace AppleHWId {
enum CpuFamily : uint32_t {
// Generic ARM.
kCpuFamily_ARM_9 = 0xE73283AEu,
kCpuFamily_ARM_11 = 0x8FF620D8u,
kCpuFamily_ARM_12 = 0xBD1B0AE9u,
kCpuFamily_ARM_13 = 0x0CC90E64u,
kCpuFamily_ARM_14 = 0x96077EF1u,
kCpuFamily_ARM_15 = 0xA8511BCAu,
// Apple design.
kCpuFamily_SWIFT = 0x1E2D6381u,
kCpuFamily_CYCLONE = 0x37A09642u,
kCpuFamily_TYPHOON = 0x2C91A47Eu,
kCpuFamily_TWISTER = 0x92FB37C8u,
kCpuFamily_HURRICANE = 0x67CEEE93u,
kCpuFamily_MONSOON_MISTRAL = 0xE81E7EF6u,
kCpuFamily_VORTEX_TEMPEST = 0x07D34B9Fu,
kCpuFamily_LIGHTNING_THUNDER = 0x462504D2u,
kCpuFamily_FIRESTORM_ICESTORM = 0x1B588BB3u
};
};
static ASMJIT_FAVOR_SIZE uint32_t queryARMCpuFamilyId() noexcept {
uint32_t result = 0;
size_t size = sizeof(result);
int res = sysctlbyname("hw.cpufamily", &result, &size, nullptr, 0);
if (res != 0)
return 0;
else
return result;
}
static ASMJIT_FAVOR_SIZE void detectARMCpu(CpuInfo& cpu) noexcept {
cpu._wasDetected = true;
populateBaseARMFeatures(cpu);
uint32_t cpuFamilyId = queryARMCpuFamilyId();
CpuFeatures::ARM& features = cpu.features().arm();
switch (cpuFamilyId) {
case AppleHWId::kCpuFamily_ARM_9:
case AppleHWId::kCpuFamily_ARM_11:
case AppleHWId::kCpuFamily_ARM_12:
break;
// ARM Cortex A8.
case AppleHWId::kCpuFamily_ARM_13:
break;
// ARM Cortex A9.
case AppleHWId::kCpuFamily_ARM_14:
break;
// ARM Cortex A7 - ARMv7k.
case AppleHWId::kCpuFamily_ARM_15:
features.add(CpuFeatures::ARM::kARMv7);
break;
// Apple A6/A6X - ARMv7s.
case AppleHWId::kCpuFamily_SWIFT:
features.add(CpuFeatures::ARM::kARMv7);
break;
// Apple A7 - ARMv8.0-A.
case AppleHWId::kCpuFamily_CYCLONE:
features.add(CpuFeatures::ARM::kARMv8a,
CpuFeatures::ARM::kAES,
CpuFeatures::ARM::kSHA1,
CpuFeatures::ARM::kSHA2);
break;
// Apple A8 - ARMv8.0-A.
case AppleHWId::kCpuFamily_TYPHOON:
features.add(CpuFeatures::ARM::kARMv8a,
CpuFeatures::ARM::kAES,
CpuFeatures::ARM::kSHA1,
CpuFeatures::ARM::kSHA2);
break;
// Apple A9 - ARMv8.0-A.
case AppleHWId::kCpuFamily_TWISTER:
features.add(CpuFeatures::ARM::kARMv8a,
CpuFeatures::ARM::kAES,
CpuFeatures::ARM::kSHA1,
CpuFeatures::ARM::kSHA2);
break;
// Apple A10 - ARMv8.1-A.
case AppleHWId::kCpuFamily_HURRICANE:
features.add(CpuFeatures::ARM::kARMv8_1a,
CpuFeatures::ARM::kAES,
CpuFeatures::ARM::kRDM,
CpuFeatures::ARM::kSHA1,
CpuFeatures::ARM::kSHA2);
break;
// Apple A11 - ARMv8.2-A.
case AppleHWId::kCpuFamily_MONSOON_MISTRAL:
features.add(CpuFeatures::ARM::kARMv8_2a,
CpuFeatures::ARM::kAES,
CpuFeatures::ARM::kFP16FULL,
CpuFeatures::ARM::kSHA1,
CpuFeatures::ARM::kSHA2);
break;
// Apple A12 - ARMv8.3-A.
case AppleHWId::kCpuFamily_VORTEX_TEMPEST:
features.add(CpuFeatures::ARM::kARMv8_3a,
CpuFeatures::ARM::kAES,
CpuFeatures::ARM::kFP16FULL,
CpuFeatures::ARM::kSHA1,
CpuFeatures::ARM::kSHA2);
break;
// Apple A13 - ARMv8.4-A.
case AppleHWId::kCpuFamily_LIGHTNING_THUNDER:
features.add(CpuFeatures::ARM::kARMv8_4a,
CpuFeatures::ARM::kAES,
CpuFeatures::ARM::kFP16FML,
CpuFeatures::ARM::kFP16FULL,
CpuFeatures::ARM::kSHA1,
CpuFeatures::ARM::kSHA2,
CpuFeatures::ARM::kSHA3,
CpuFeatures::ARM::kSHA512);
break;
// Apple A14/M1 - ARMv8.5-A.
case AppleHWId::kCpuFamily_FIRESTORM_ICESTORM:
features.add(CpuFeatures::ARM::kARMv8_4a,
CpuFeatures::ARM::kAES,
CpuFeatures::ARM::kALTNZCV,
CpuFeatures::ARM::kFP16FML,
CpuFeatures::ARM::kFP16FULL,
CpuFeatures::ARM::kFRINT,
CpuFeatures::ARM::kSB,
CpuFeatures::ARM::kSHA1,
CpuFeatures::ARM::kSHA2,
CpuFeatures::ARM::kSHA3,
CpuFeatures::ARM::kSHA512,
CpuFeatures::ARM::kSSBS);
break;
default:
cpu._wasDetected = false;
break;
}
expandARMFeaturesByVersion(cpu);
}
// CpuInfo - Detect - ARM [Unknown]
// ================================
#else
#if ASMJIT_ARCH_ARM == 64
#pragma message("[asmjit] Disabling runtime CPU detection - unsupported OS/CPU combination (Unknown OS with AArch64 CPU)")
#else
#pragma message("[asmjit] Disabling runtime CPU detection - unsupported OS/CPU combination (Unknown OS with ARM CPU)")
#endif
static ASMJIT_FAVOR_SIZE void detectARMCpu(CpuInfo& cpu) noexcept {
populateBaseARMFeatures(cpu);
detectARMFeaturesViaCompilerFlags(cpu);
expandARMFeaturesByVersion(cpu);
}
#endif
#endif
// CpuInfo - Detect - Host
// =======================
static uint32_t cpuInfoInitialized;
static CpuInfo cpuInfoGlobal(Globals::NoInit);
const CpuInfo& CpuInfo::host() noexcept {
// This should never cause a problem as the resulting information should always be the same. In the worst case we
// would just overwrite it non-atomically.
if (!cpuInfoInitialized) {
CpuInfo cpuInfoLocal;
cpuInfoLocal._arch = Arch::kHost;
cpuInfoLocal._subArch = SubArch::kHost;
#if ASMJIT_ARCH_X86
detectX86Cpu(cpuInfoLocal);
#elif ASMJIT_ARCH_ARM
detectARMCpu(cpuInfoLocal);
#else
#pragma message("[asmjit] Disabling runtime CPU detection - unsupported OS/CPU combination (Unknown CPU)")
#endif
cpuInfoLocal._hwThreadCount = detectHWThreadCount();
cpuInfoGlobal = cpuInfoLocal;
cpuInfoInitialized = 1;
}
return cpuInfoGlobal;
}
ASMJIT_END_NAMESPACE
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