Add Altivec Xor for XTS mode

1 files changed, 8 insertions, 0 deletions

diff --git a/xts.cpp b/xts.cpp
index d123a745..8cbc7bd1 100644
--- a/xts.cpp
+++ b/xts.cpp
@@ -34,6 +34,10 @@
 # endif

 #endif

 

+#if defined(__ALTIVEC__)

+# include "ppc_simd.h"

+#endif

+

 ANONYMOUS_NAMESPACE_BEGIN

 

 using namespace CryptoPP;

@@ -76,6 +80,10 @@ inline void XorBuffer(byte *output, const byte *input, const byte *mask, size_t
     for (size_t i=0; i<count; i+=16)

         vst1q_u8(output+i, veorq_u8(vld1q_u8(input+i), vld1q_u8(mask+i)));

 

+#elif defined(__ALTIVEC__)

+    for (size_t i=0; i<count; i+=16)

+        VecStore(VecXor(VecLoad(input+i), VecLoad(mask+i)), output+i);

+

 #else

     xorbuf(output, input, mask, count);

 #endif