Add Altivec vector extraction tests

1 files changed, 17 insertions, 1 deletions

diff --git a/ppc-simd.h b/ppc-simd.h
index 6fc52848..a6013e19 100644
--- a/ppc-simd.h
+++ b/ppc-simd.h
@@ -58,7 +58,7 @@ typedef __vector unsigned long long uint64x2_p;
 #endif  // POWER8 datatypes

 #endif  // ALTIVEC datatypes

 

-// ALTIVEC and above

+// Applies to all POWER machines

 #if defined(CRYPTOPP_ALTIVEC_AVAILABLE) || defined(CRYPTOPP_DOXYGEN_PROCESSING)

 

 /// \brief Reverse a vector

@@ -269,6 +269,22 @@ inline uint64x2_p VectorShiftRight<0, uint64x2_p>(const uint64x2_p& vec)
 }

 #endif

 

+template <class T>

+inline T VectorGetLow(const T& val)

+{

+	const T zero = {0};

+	const uint8x16_p mask = {16,16,16,16, 16,16,16,16, 8,9,10,11, 12,13,14,15 };

+	return (T)vec_perm(val, zero, mask);

+}

+

+template <class T>

+inline T VectorGetHigh(const T& val)

+{

+	const T zero = {0};

+	const uint8x16_p mask = {16,16,16,16, 16,16,16,16, 0,1,2,3, 4,5,6,7 };

+	return (T)vec_perm(val, zero, mask);

+}

+

 /// \brief Compare two vectors

 /// \tparam T1 vector type

 /// \tparam T2 vector type