Use vec_splat instead of load and permute

1 files changed, 38 insertions, 12 deletions

diff --git a/simon128_simd.cpp b/simon128_simd.cpp
index bc901ccb..881cc203 100644
--- a/simon128_simd.cpp
+++ b/simon128_simd.cpp
@@ -640,23 +640,36 @@ inline void SIMON128_Dec_Block(uint32x4_p &block, const word64 *subkeys, unsigne
     {

         std::swap(x1, y1);

 

-        const uint8x16_p m = {0,1,2,3, 4,5,6,7, 0,1,2,3, 4,5,6,7};

         const word32* ptr = reinterpret_cast<const word32*>(subkeys+rounds-1);

-        const simon128_t rk = (simon128_t)VecPermute(VecLoad(ptr), m);

+        const simon128_t rk = (simon128_t)VecLoad(ptr);

+

+#if defined(_ARCH_PWR8)

+        const simon128_t rk1 = vec_splat(rk, 0);

+#else

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

+        const simon128_t rk1 = VecPermute(rk, m);

+#endif

 

-        y1 = VecXor64(VecXor64(y1, rk), SIMON128_f(x1));

+        y1 = VecXor64(VecXor64(y1, rk1), SIMON128_f(x1));

         rounds--;

     }

 

     for (int i = static_cast<int>(rounds-2); i >= 0; i -= 2)

     {

-        const uint8x16_p m1 = {8,9,10,11, 12,13,14,15, 8,9,10,11, 12,13,14,15};

-        const uint8x16_p m2 = {0,1,2,3, 4,5,6,7, 0,1,2,3, 4,5,6,7};

         const word32* ptr = reinterpret_cast<const word32*>(subkeys+i);

         const simon128_t rk = (simon128_t)VecLoad(ptr);

 

+#if defined(_ARCH_PWR8)

+        const simon128_t rk1 = vec_splat(rk, 1);

+        const simon128_t rk2 = vec_splat(rk, 0);

+#else

+        const uint8x16_p m1 = {8,9,10,11, 12,13,14,15, 8,9,10,11, 12,13,14,15};

+        const uint8x16_p m2 = {0,1,2,3, 4,5,6,7, 0,1,2,3, 4,5,6,7};

+

         const simon128_t rk1 = VecPermute(rk, m1);

         const simon128_t rk2 = VecPermute(rk, m2);

+#endif

+

         x1 = VecXor64(VecXor64(x1, SIMON128_f(y1)), rk1);

         y1 = VecXor64(VecXor64(y1, SIMON128_f(x1)), rk2);

     }

@@ -698,6 +711,7 @@ inline void SIMON128_Enc_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
         // Round keys are pre-splated in forward direction

         const word32* ptr1 = reinterpret_cast<const word32*>(subkeys+i*2);

         const simon128_t rk1 = (simon128_t)VecLoadAligned(ptr1);

+

         const word32* ptr2 = reinterpret_cast<const word32*>(subkeys+i*2+2);

         const simon128_t rk2 = (simon128_t)VecLoadAligned(ptr2);

 

@@ -764,25 +778,37 @@ inline void SIMON128_Dec_6_Blocks(uint32x4_p &block0, uint32x4_p &block1,
     {

         std::swap(x1, y1); std::swap(x2, y2); std::swap(x3, y3);

 

-        const uint8x16_p m = {0,1,2,3, 4,5,6,7, 0,1,2,3, 4,5,6,7};

         const word32* ptr = reinterpret_cast<const word32*>(subkeys+rounds-1);

-        const simon128_t rk = (simon128_t)VecPermute(VecLoad(ptr), m);

+        const simon128_t rk = (simon128_t)VecLoad(ptr);

+

+#if defined(_ARCH_PWR8)

+        const simon128_t rk1 = vec_splat(rk, 0);

+#else

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

+        const simon128_t rk1 = VecPermute(rk, m);

+#endif

 

-        y1 = VecXor64(VecXor64(y1, rk), SIMON128_f(x1));

-        y2 = VecXor64(VecXor64(y2, rk), SIMON128_f(x2));

-        y3 = VecXor64(VecXor64(y3, rk), SIMON128_f(x3));

+        y1 = VecXor64(VecXor64(y1, rk1), SIMON128_f(x1));

+        y2 = VecXor64(VecXor64(y2, rk1), SIMON128_f(x2));

+        y3 = VecXor64(VecXor64(y3, rk1), SIMON128_f(x3));

         rounds--;

     }

 

     for (int i = static_cast<int>(rounds-2); i >= 0; i -= 2)

     {

-        const uint8x16_p m1 = {8,9,10,11, 12,13,14,15, 8,9,10,11, 12,13,14,15};

-        const uint8x16_p m2 = {0,1,2,3, 4,5,6,7, 0,1,2,3, 4,5,6,7};

         const word32* ptr = reinterpret_cast<const word32*>(subkeys+i);

         const simon128_t rk = (simon128_t)VecLoad(ptr);

 

+#if defined(_ARCH_PWR8)

+        const simon128_t rk1 = vec_splat(rk, 1);

+        const simon128_t rk2 = vec_splat(rk, 0);

+#else

+        const uint8x16_p m1 = {8,9,10,11, 12,13,14,15, 8,9,10,11, 12,13,14,15};

+        const uint8x16_p m2 = {0,1,2,3, 4,5,6,7, 0,1,2,3, 4,5,6,7};

+

         const simon128_t rk1 = VecPermute(rk, m1);

         const simon128_t rk2 = VecPermute(rk, m2);

+#endif

 

         x1 = VecXor64(VecXor64(x1, SIMON128_f(y1)), rk1);

         x2 = VecXor64(VecXor64(x2, SIMON128_f(y2)), rk1);