From be0dea49be333f4c7434bf8e2fffb81b5e00498d Mon Sep 17 00:00:00 2001
From: Jeffrey Walton <noloader@gmail.com>
Date: Wed, 8 Apr 2020 22:19:50 -0400
Subject: Add VecSplatElement64 for PowerPC

---
 ppc_simd.h | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)

(limited to 'ppc_simd.h')

diff --git a/ppc_simd.h b/ppc_simd.h
index 1bb91d99..1803c00d 100644
--- a/ppc_simd.h
+++ b/ppc_simd.h
@@ -1773,6 +1773,41 @@ inline uint32x4_p VecSplatWord(word32 val)
 #endif
 }
 
+/// \brief Broadcast 32-bit word to a vector
+/// \tparam the element number
+/// \param val the 32-bit value
+/// \returns vector
+/// \since Crypto++ 8.3
+template <unsigned int N>
+inline uint32x4_p VecSplatElement(const uint32x4_p val)
+{
+#if defined(_ARCH_PWR8)
+    return vec_splat(val, N);
+#else
+    enum {E=N&3};
+    if (E == 0)
+    {
+        const uint8x16_p m = {0,1,2,3, 0,1,2,3, 0,1,2,3, 0,1,2,3};
+        return vec_perm(val, val, m);
+    }
+    else if (E == 1)
+    {
+        const uint8x16_p m = {4,5,6,7, 4,5,6,7, 4,5,6,7, 4,5,6,7};
+        return vec_perm(val, val, m);
+    }
+    else if (E == 2)
+    {
+        const uint8x16_p m = {8,9,10,11, 8,9,10,11, 8,9,10,11, 8,9,10,11};
+        return vec_perm(val, val, m);
+    }
+    else // (E == 3)
+    {
+        const uint8x16_p m = {12,13,14,15, 12,13,14,15, 12,13,14,15, 12,13,14,15};
+        return vec_perm(val, val, m);
+    }
+#endif
+}
+
 #if defined(_ARCH_PWR8) || defined(CRYPTOPP_DOXYGEN_PROCESSING)
 /// \brief Broadcast 64-bit double word to a vector
 /// \param val the 64-bit value
@@ -1783,6 +1818,31 @@ inline uint64x2_p VecSplatWord(word64 val)
     // The PPC64 ABI says so.
     return vec_splats((unsigned long long)val);
 }
+
+/// \brief Broadcast 64-bit word to a vector
+/// \tparam the element number
+/// \param val the 64-bit value
+/// \returns vector
+/// \since Crypto++ 8.3
+template <unsigned int N>
+inline uint64x2_p VecSplatElement(const uint64x2_p val)
+{
+#if defined(_ARCH_PWR8)
+    return vec_splat(val, N);
+#else
+    enum {E=N&1};
+    if (E == 0)
+    {
+        const uint8x16_p m = {0,1,2,3, 4,5,6,7, 0,1,2,3, 4,5,6,7};
+        return vec_perm(val, val, m);
+    }
+    else // (E == 1)
+    {
+        const uint8x16_p m = {8,9,10,11, 12,13,14,15, 8,9,10,11, 12,13,14,15};
+        return vec_perm(val, val, m);
+    }
+#endif
+}
 #endif
 
 /// \brief Extract a dword from a vector
@@ -2219,6 +2279,44 @@ inline uint32x4_p VecSplatWord64(word64 val)
 #endif
 }
 
+/// \brief Broadcast 64-bit word to a vector
+/// \tparam the element number
+/// \param val the 64-bit value
+/// \returns vector
+/// \since Crypto++ 8.3
+template <unsigned int N>
+inline uint32x4_p VecSplatElement64(const uint32x4_p val)
+{
+#if defined(_ARCH_PWR8)
+    return vec_splat((uint64x2_p)val, N);
+#else
+    enum {E=N&1};
+    if (E == 0)
+    {
+        const uint8x16_p m = {0,1,2,3, 4,5,6,7, 0,1,2,3, 4,5,6,7};
+        return vec_perm(val, val, m);
+    }
+    else // (E == 1)
+    {
+        const uint8x16_p m = {8,9,10,11, 12,13,14,15, 8,9,10,11, 12,13,14,15};
+        return vec_perm(val, val, m);
+    }
+#endif
+}
+
+#if defined(_ARCH_PWR8) || defined(CRYPTOPP_DOXYGEN_PROCESSING)
+/// \brief Broadcast 64-bit word to a vector
+/// \tparam the element number
+/// \param val the 64-bit value
+/// \returns vector
+/// \since Crypto++ 8.3
+template <unsigned int N>
+inline uint64x2_p VecSplatElement64(const uint64x2_p val)
+{
+    return vec_splat(val, N);
+}
+#endif
+
 //@}
 
 //////////////////////// Power8 Crypto ////////////////////////
-- 
cgit v1.2.1