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Add ARMv7 cpu detection

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This commit is contained in:
Jeffrey Walton 2018-07-08 02:49:21 -04:00
parent 886e48d85d
commit 517d552a91
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GPG Key ID: B36AB348921B1838
4 changed files with 115 additions and 16 deletions
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39
cpu.cpp
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@ -358,6 +358,7 @@ void DetectX86Features()
#elif (CRYPTOPP_BOOL_ARM32 || CRYPTOPP_BOOL_ARM64)
bool CRYPTOPP_SECTION_INIT g_ArmDetectionDone = false;
bool CRYPTOPP_SECTION_INIT g_hasARMv7 = false;
bool CRYPTOPP_SECTION_INIT g_hasNEON = false;
bool CRYPTOPP_SECTION_INIT g_hasPMULL = false;
bool CRYPTOPP_SECTION_INIT g_hasCRC32 = false;
@ -379,6 +380,7 @@ word32 CRYPTOPP_SECTION_INIT g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
// http://stackoverflow.com/a/11197770/608639 and
// http://gist.github.com/erkanyildiz/390a480f27e86f8cd6ba
extern bool CPU_ProbeARMv7();
extern bool CPU_ProbeNEON();
extern bool CPU_ProbeCRC32();
extern bool CPU_ProbeAES();
@ -386,6 +388,9 @@ extern bool CPU_ProbeSHA1();
extern bool CPU_ProbeSHA2();
extern bool CPU_ProbePMULL();
#ifndef HWCAP_ARMv7
# define HWCAP_ARMv7 (1 << 29)
#endif
#ifndef HWCAP_ASIMD
# define HWCAP_ASIMD (1 << 1)
#endif
@ -423,6 +428,25 @@ extern bool CPU_ProbePMULL();
# define HWCAP2_SHA2 (1 << 3)
#endif
inline bool CPU_QueryARMv7()
{
#if defined(__aarch32__) || defined(__aarch64__)
// ARMv7 or above
return true;
#elif defined(__ANDROID__) && defined(__arm__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_ARMv7) != 0))
return true;
#elif defined(__linux__) && defined(__arm__)
if ((getauxval(AT_HWCAP) & HWCAP_ARMv7) != 0)
return true;
#elif defined(__APPLE__) && defined(__arm__)
// Apple hardware is ARMv7 or above.
return true;
#endif
return false;
}
inline bool CPU_QueryNEON()
{
#if defined(__ANDROID__) && defined(__aarch64__)
@ -430,7 +454,7 @@ inline bool CPU_QueryNEON()
((android_getCpuFeatures() & ANDROID_CPU_ARM64_FEATURE_ASIMD) != 0))
return true;
#elif defined(__ANDROID__) && defined(__arm__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0))
return true;
#elif defined(__linux__) && defined(__aarch64__)
@ -456,7 +480,7 @@ inline bool CPU_QueryCRC32()
((android_getCpuFeatures() & ANDROID_CPU_ARM64_FEATURE_CRC32) != 0))
return true;
#elif defined(__ANDROID__) && defined(__aarch32__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_CRC32) != 0))
return true;
#elif defined(__linux__) && defined(__aarch64__)
@ -475,7 +499,7 @@ inline bool CPU_QueryCRC32()
inline bool CPU_QueryPMULL()
{
#if defined(__ANDROID__) && defined(__aarch64__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM64) != 0) &&
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM64) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM64_FEATURE_PMULL) != 0))
return true;
#elif defined(__ANDROID__) && defined(__aarch32__)
@ -498,11 +522,11 @@ inline bool CPU_QueryPMULL()
inline bool CPU_QueryAES()
{
#if defined(__ANDROID__) && defined(__aarch64__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM64) != 0) &&
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM64) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM64_FEATURE_AES) != 0))
return true;
#elif defined(__ANDROID__) && defined(__aarch32__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_AES) != 0))
return true;
#elif defined(__linux__) && defined(__aarch64__)
@ -568,7 +592,7 @@ inline bool CPU_QuerySHA1()
inline bool CPU_QuerySHA2()
{
#if defined(__ANDROID__) && defined(__aarch64__)
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM64) != 0) &&
if (((android_getCpuFamily() & ANDROID_CPU_FAMILY_ARM64) != 0) &&
((android_getCpuFeatures() & ANDROID_CPU_ARM64_FEATURE_SHA2) != 0))
return true;
#elif defined(__ANDROID__) && defined(__aarch32__)
@ -604,7 +628,8 @@ void DetectArmFeatures()
{
// The CPU_ProbeXXX's return false for OSes which
// can't tolerate SIGILL-based probes
g_hasNEON = CPU_QueryNEON() || CPU_ProbeNEON();
g_hasARMv7 = CPU_QueryARMv7() || CPU_ProbeARMv7();
g_hasNEON = CPU_QueryNEON() || CPU_ProbeNEON();
g_hasCRC32 = CPU_QueryCRC32() || CPU_ProbeCRC32();
g_hasPMULL = CPU_QueryPMULL() || CPU_ProbePMULL();
g_hasAES = CPU_QueryAES() || CPU_ProbeAES();

18
cpu.h
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@ -342,13 +342,29 @@ inline int GetCacheLineSize()
// Hide from Doxygen
#ifndef CRYPTOPP_DOXYGEN_PROCESSING
extern bool g_ArmDetectionDone;
extern bool g_hasNEON, g_hasPMULL, g_hasCRC32, g_hasAES, g_hasSHA1, g_hasSHA2;
extern bool g_hasARMv7, g_hasNEON, g_hasPMULL, g_hasCRC32, g_hasAES, g_hasSHA1, g_hasSHA2;
void CRYPTOPP_API DetectArmFeatures();
#endif // CRYPTOPP_DOXYGEN_PROCESSING
/// \name ARM A-32, Aarch32 and AArch64 CPU FEATURES
//@{
/// \brief Determine if an ARM processor is ARMv7 or above
/// \returns true if the hardware is ARMv7 or above, false otherwise.
/// \details Some AES code requires ARMv7 or above
/// \note This function is only available on ARM-32, Aarch32 and Aarch64 platforms
inline bool HasARMv7()
{
// ASIMD is a core feature on Aarch32 and Aarch64 like SSE2 is a core feature on x86_64
#if defined(__aarch32__) || defined(__aarch64__)
return true;
#else
if (!g_ArmDetectionDone)
DetectArmFeatures();
return g_hasARMv7;
#endif
}
/// \brief Determine if an ARM processor has Advanced SIMD available
/// \returns true if the hardware is capable of Advanced SIMD at runtime, false otherwise.
/// \details Advanced SIMD instructions are available under most ARMv7, Aarch32 and Aarch64.

52
neon-simd.cpp
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@ -47,6 +47,58 @@ extern "C" {
}
#endif // Not CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY
bool CPU_ProbeARMv7()
{
#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)
return false;
#elif (CRYPTOPP_ARM_NEON_AVAILABLE)
# if defined(CRYPTOPP_MS_STYLE_INLINE_ASSEMBLY)
volatile bool result = true;
__try
{
// Modern MS hardware is ARMv7
result = true;
}
__except (EXCEPTION_EXECUTE_HANDLER)
{
return false;
}
return result;
# else
// longjmp and clobber warnings. Volatile is required.
// http://github.com/weidai11/cryptopp/issues/24 and http://stackoverflow.com/q/7721854
volatile bool result = true;
volatile SigHandler oldHandler = signal(SIGILL, SigIllHandler);
if (oldHandler == SIG_ERR)
return false;
volatile sigset_t oldMask;
if (sigprocmask(0, NULLPTR, (sigset_t*)&oldMask))
return false;
if (setjmp(s_jmpSIGILL))
result = false;
else
{
// ARMv7 added movt and movw
int a;
asm volatile("movw %0,%1 \n"
"movt %0,%1 \n"
: "=r"(a) : "i"(0x1234));
result = (a == 0x12341234);
}
sigprocmask(SIG_SETMASK, (sigset_t*)&oldMask, NULLPTR);
signal(SIGILL, oldHandler);
return result;
# endif
#else
return false;
#endif // CRYPTOPP_ARM_NEON_AVAILABLE
}
bool CPU_ProbeNEON()
{
#if defined(CRYPTOPP_NO_CPU_FEATURE_PROBES)

22
validat1.cpp
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@ -383,13 +383,16 @@ bool TestSettings()
bool hasSHA = HasSHA();
bool isP4 = IsP4();
std::cout << "hasSSE2 == " << hasSSE2 << ", hasSSSE3 == " << hasSSSE3 << ", hasSSE4.1 == " << hasSSE41;
std::cout << ", hasSSE4.2 == " << hasSSE42 << ", hasAVX == " << hasAVX << ", hasAVX2 == " << hasAVX2;
std::cout << ", hasAESNI == " << hasAESNI << ", hasCLMUL == " << hasCLMUL << ", hasRDRAND == " << hasRDRAND;
std::cout << ", hasRDSEED == " << hasRDSEED << ", hasSHA == " << hasSHA << ", isP4 == " << isP4;
std::cout << "hasSSE2 == " << hasSSE2 << ", hasSSSE3 == " << hasSSSE3;
std::cout << ", hasSSE4.1 == " << hasSSE41 << ", hasSSE4.2 == " << hasSSE42;
std::cout << ", hasAVX == " << hasAVX << ", hasAVX2 == " << hasAVX2;
std::cout << ", hasAESNI == " << hasAESNI << ", hasCLMUL == " << hasCLMUL;
std::cout << ", hasRDRAND == " << hasRDRAND << ", hasRDSEED == " << hasRDSEED;
std::cout << ", hasSHA == " << hasSHA << ", isP4 == " << isP4;
std::cout << "\n";
#elif (CRYPTOPP_BOOL_ARM32 || CRYPTOPP_BOOL_ARM64)
bool hasARMv7 = HasARMv7();
bool hasNEON = HasNEON();
bool hasCRC32 = HasCRC32();
bool hasPMULL = HasPMULL();
@ -398,8 +401,10 @@ bool TestSettings()
bool hasSHA2 = HasSHA2();
std::cout << "passed: ";
std::cout << "hasNEON == " << hasNEON << ", hasCRC32 == " << hasCRC32 << ", hasPMULL == " << hasPMULL;
std::cout << ", hasAES == " << hasAES << ", hasSHA1 == " << hasSHA1 << ", hasSHA2 == " << hasSHA2 << "\n";
std::cout << "hasARMv7 == " << hasARMv7 << ", hasNEON == " << hasNEON;
std::cout << ", hasCRC32 == " << hasCRC32 << ", hasPMULL == " << hasPMULL;
std::cout << ", hasAES == " << hasAES << ", hasSHA1 == " << hasSHA1;
std::cout << ", hasSHA2 == " << hasSHA2 << "\n";
#elif (CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64)
const bool hasAltivec = HasAltivec();
@ -410,8 +415,9 @@ bool TestSettings()
const bool hasSHA512 = HasSHA512();
std::cout << "passed: ";
std::cout << "hasAltivec == " << hasAltivec << ", hasPower7 == " << hasPower7 << ", hasPower8 == " << hasPower8;
std::cout << ", hasAES == " << hasAES << ", hasSHA256 == " << hasSHA256 << ", hasSHA512 == " << hasSHA512 << "\n";
std::cout << "hasAltivec == " << hasAltivec << ", hasPower7 == " << hasPower7;
std::cout << ", hasPower8 == " << hasPower8 << ", hasAES == " << hasAES;
std::cout << ", hasSHA256 == " << hasSHA256 << ", hasSHA512 == " << hasSHA512 << "\n";
#endif