Re-add VecReverse for PowerPC

1 files changed, 20 insertions, 0 deletions

diff --git a/ppc_simd.h b/ppc_simd.h
index 9011724d..cbe64b0e 100644
--- a/ppc_simd.h
+++ b/ppc_simd.h
@@ -230,6 +230,26 @@ inline uint32x4_p VecOne()
 /// \tparam T vector type

 /// \param data the vector

 /// \returns vector

+/// \details VecReverseLE() reverses the bytes in a vector

+/// \par Wraps

+///  vec_perm

+/// \since Crypto++ 6.0

+template <class T>

+inline T VecReverse(const T data)

+{

+#if defined(CRYPTOPP_BIG_ENDIAN)

+    const uint8x16_p mask = {15,14,13,12, 11,10,9,8, 7,6,5,4, 3,2,1,0};

+    return (T)vec_perm(data, data, mask);

+#else

+    const uint8x16_p mask = {0,1,2,3, 4,5,6,7, 8,9,10,11, 12,13,14,15};

+    return (T)vec_perm(data, data, mask);

+#endif

+}

+

+/// \brief Reverse bytes in a vector

+/// \tparam T vector type

+/// \param data the vector

+/// \returns vector

 /// \details VecReverseLE() reverses the bytes in a vector on

 ///  little-endian systems.

 /// \par Wraps