Remove NEON code paths from xorbuf

NEON on 32-bit ARM machines is experiencing a slight slowdown on modern compilers.

1 files changed, 1 insertions, 19 deletions

diff --git a/misc.cpp b/misc.cpp
index f078de1a..cd329c72 100644
--- a/misc.cpp
+++ b/misc.cpp
@@ -23,7 +23,7 @@
 # include <immintrin.h>

 #endif

 

-#if defined(__ARM_FEATURE_NEON) || defined(__aarch64__) || defined(__aarch32__) || defined(_M_ARM64)

+#if defined(__aarch64__) || defined(__aarch32__) || defined(_M_ARM64)

 # if defined(CRYPTOPP_ARM_NEON_HEADER)

 #  include <arm_neon.h>

 # endif

@@ -93,15 +93,6 @@ void xorbuf(byte *buf, const byte *mask, size_t count)
 

 	if (count == 0) return;

 #endif

-#if defined(__ARM_FEATURE_NEON)

-	while (count >= 16)

-	{

-		vst1q_u8(buf, veorq_u8(vld1q_u8(buf), vld1q_u8(mask)));

-		buf += 16; mask += 16; count -= 16;

-	}

-

-	if (count == 0) return;

-#endif

 

 #if CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64

 	// word64 and stride of 8 slows things down on x86_64.

@@ -177,15 +168,6 @@ void xorbuf(byte *output, const byte *input, const byte *mask, size_t count)
 

 	if (count == 0) return;

 #endif

-#if defined(__ARM_FEATURE_NEON)

-	while (count >= 16)

-	{

-		vst1q_u8(output, veorq_u8(vld1q_u8(input), vld1q_u8(mask)));

-		output += 16; input += 16; mask += 16; count -= 16;

-	}

-

-	if (count == 0) return;

-#endif

 

 #if CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64

 	// word64 and stride of 8 slows things down on x86_64.