Add ARMv8 neon implementation

keccakp/KeccakF-1600-armv8a-neon.c

+/*
+The Keccak sponge function, designed by Guido Bertoni, Joan Daemen,
+Michaël Peeters and Gilles Van Assche. For more information, feedback or
+questions, please refer to our website: http://keccak.noekeon.org/
+
+Implementation by the designers,
+hereby denoted as "the implementer".
+
+To the extent possible under law, the implementer has waived all copyright
+and related or neighboring rights to the source code in this file.
+http://creativecommons.org/publicdomain/zero/1.0/
+*/
+
+#define STATEI unsigned long long int
+#include <string.h>
+#include "brg_endian.h"
+#include "KeccakF-1600-opt64-settings.h"
+#include "KeccakF-1600.h"
+
+extern void KeccakP1600_Permute(void * state, int round);
+extern void KeccakP1600_Initialize(void * state);
+
+void KeccakF(keccak_state state, int round)
+{
+  KeccakP1600_Permute(state, round);
+}
+
+void KeccakInitializeState(keccak_state state)
+{
+  KeccakP1600_Initialize(state);
+}
+
+void KeccakInitialize()
+{
+}
+
+void KeccakExtract(keccak_state state, UINT64 *data, int byteCount)
+{
+  memmove(data, state, byteCount);
+}
+
+void KeccakAbsorb(keccak_state state, UINT64 *data, int byteCount)
+{
+  int i;
+  keccak_state datai;
+  memmove(datai, data, byteCount);
+  for(i=0; i<byteCount-7; i+=8) {
+    state[i>>3] ^= datai[i>>3];
+  }
+  if(byteCount & 7) {
+    UINT64 m = 0xffffffffffffffffull >> ((8-byteCount) & 7)*8;
+    state[i>>3] ^= datai[i>>3] & m;
+  }
+}
+
+void KeccakEncrypt(keccak_state state, UINT64 *data, int byteCount)
+{
+  int i;
+  keccak_state datai;
+  memmove(datai, data, byteCount);
+  for(i=0; i<byteCount-7; i+=8) {
+    datai[i>>3] = state[i>>3] ^= datai[i>>3];
+  }
+  if(byteCount & 7) {
+    UINT64 m = 0xffffffffffffffffull >> ((8-byteCount) & 7)*8;
+    state[i>>3] ^= datai[i>>3] & m;
+    datai[i>>3] = state[i>>3];
+  }
+  memmove(data, datai, byteCount);
+}
+
+void KeccakDecrypt(keccak_state state, UINT64 *data, int byteCount)
+{
+  int i;
+  UINT64 tmp;
+  keccak_state datai;
+  memmove(datai, data, byteCount);
+  for(i=0; i<byteCount-7; i+=8) {
+    tmp = datai[i>>3] ^ state[i>>3];
+    state[i>>3] = datai[i>>3];
+    datai[i>>3] = tmp;
+  }
+  if(byteCount & 7) {
+    UINT64 m = 0xffffffffffffffffull >> ((8-byteCount) & 7)*8;
+    tmp = datai[i>>3] ^ state[i>>3];
+    state[i>>3] = (datai[i>>3] & m) | (state[i>>3] & ~m);
+    datai[i>>3] = tmp;
+  }
+  memmove(data, datai, byteCount);
+}

keccakp/configure.ac

@@ -29,6 +29,15 @@ nomflags="`echo $CFLAGS | sed -e 's/-m[[^ ]]* //g'`"
 
 # special optimizations for some plattforms
 case "$host" in
+     aarch64*)
+	asmflags="-O3 -mfpu=neon $nomflags"
+	flags="-O3 -mfpu=neon $nomflags"
+	as="armv8a-neon"
+	enable_asm=yes
+	plattform=armv8a-neon
+	CFLAGS=""
+	CCASFLAGS=""
+	;;
      arm*-*linux*)
 	flags="$CFLAGS"
 	asmflags="$CFLAGS"