diff options
Diffstat (limited to 'cpu.h')
| -rw-r--r-- | cpu.h | 18 |
1 files changed, 17 insertions, 1 deletions
@@ -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.
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