Add BLAKE2b Power8 implementation (GH #731)

1 files changed, 19 insertions, 0 deletions

diff --git a/blake2.cpp b/blake2.cpp
index 726a0bf8..d14f318c 100644
--- a/blake2.cpp
+++ b/blake2.cpp
@@ -22,6 +22,11 @@
 # undef CRYPTOPP_ARM_NEON_AVAILABLE

 #endif

 

+// Disable POWER7 on PowerPC big-endian machines. BLAKE2s runs slower than C++.

+#if defined(__powerpc__) && defined(__BIG_ENDIAN__)

+# undef CRYPTOPP_POWER7_AVAILABLE

+#endif

+

 ANONYMOUS_NAMESPACE_BEGIN

 

 using CryptoPP::byte;

@@ -149,6 +154,10 @@ extern void BLAKE2_Compress32_NEON(const byte* input, BLAKE2_State<word32, false
 extern void BLAKE2_Compress64_NEON(const byte* input, BLAKE2_State<word64, true>& state);

 #endif

 

+#if CRYPTOPP_POWER7_AVAILABLE

+extern void BLAKE2_Compress32_POWER7(const byte* input, BLAKE2_State<word32, false>& state);

+#endif

+

 #if CRYPTOPP_POWER8_AVAILABLE

 extern void BLAKE2_Compress64_POWER8(const byte* input, BLAKE2_State<word64, true>& state);

 #endif

@@ -356,6 +365,10 @@ std::string BLAKE2_Base<W, T_64bit>::AlgorithmProvider() const
     if (HasNEON())

         return "NEON";

 #endif

+#if (CRYPTOPP_POWER7_AVAILABLE)

+    if (HasPower7() && T_64bit == false)

+        return "Power7";

+#endif

 #if (CRYPTOPP_POWER8_AVAILABLE)

     if (HasPower8() && T_64bit == true)

         return "Power8";

@@ -542,6 +555,12 @@ void BLAKE2_Base<word32, false>::Compress(const byte *input)
         return BLAKE2_Compress32_NEON(input, *m_state.data());

     }

 #endif

+#if CRYPTOPP_POWER7_AVAILABLE

+    if(HasPower7())

+    {

+        return BLAKE2_Compress32_POWER7(input, *m_state.data());

+    }

+#endif

     return BLAKE2_Compress32_CXX(input, *m_state.data());

 }