Add ARM SHA extensions for SHA1

Benchmarking on ARMv8/Aarch64 dev-board shows SHA-1 speeds up by 2.5x

1 files changed, 7 insertions, 4 deletions

diff --git a/cpu.h b/cpu.h
index 0d817d4c..7f299a05 100644
--- a/cpu.h
+++ b/cpu.h
@@ -1,8 +1,9 @@
 // cpu.h - written and placed in the public domain by Wei Dai

+//         updated for ARM by Jeffrey Walton

 

 //! \file cpu.h

 //! \brief Functions for CPU features and intrinsics

-//! \details The functions are used in X86/X32/X64 and NEON code paths

+//! \details The functions are used in X86/X32/X64 and ARM code paths

 

 #ifndef CRYPTOPP_CPU_H

 #define CRYPTOPP_CPU_H

@@ -21,11 +22,13 @@
 # if defined(__GNUC__)

 #  include <stdint.h>

 # endif

-# if CRYPTOPP_BOOL_NEON_INTRINSICS_AVAILABLE || defined(__ARM_NEON)

+# if defined(__ARM_NEON)

 #  include <arm_neon.h>

 # endif

-# if (CRYPTOPP_BOOL_ARM_CRYPTO_INTRINSICS_AVAILABLE || CRYPTOPP_BOOL_ARM_CRC32_INTRINSICS_AVAILABLE) || defined(__ARM_ACLE)

-#  include <arm_acle.h>

+# if defined(__GNUC__) && !defined(__clang__)

+#  if defined(__ARM_ACLE) || defined(__ARM_FEATURE_CRC32) || defined(__ARM_FEATURE_CRYPTO)

+# 	include <arm_acle.h>

+#  endif

 # endif

 #endif  // ARM32 and ARM64 Headers