n64: use xxh3 instead of crc32 for rsp cache

This is a significantly faster and stronger algorithm than crc32

LICENSE

@@ -145,4 +145,39 @@ Gailly and Mark Adler; it does not include third-party code.
 If you redistribute modified sources, we would appreciate that you include in
 the file ChangeLog history information documenting your changes.  Please read
 the FAQ for more information on the distribution of modified source versions.
-----------------------------------------------------------------------
+----------------------------------------------------------------------
+
+----------------------------------------------------------------------
+
+xxHash - Extremely Fast Hash algorithm
+Header File
+Copyright (C) 2012-2021 Yann Collet
+
+BSD 2-Clause License (https://www.opensource.org/licenses/bsd-license.php)
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+* Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+* Redistributions in binary form must reproduce the above
+  copyright notice, this list of conditions and the following disclaimer
+  in the documentation and/or other materials provided with the
+  distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+You can contact the author at:
+- xxHash homepage: https://www.xxhash.com
+- xxHash source repository: https://github.com/Cyan4973/xxHash

ares/n64/n64.hpp

@@ -1,6 +1,8 @@
 #pragma once
 //started: 2020-04-28
 
+#define XXH_INLINE_ALL
+#include <xxhash.h>
 #include <ares/ares.hpp>
 #include <nall/hashset.hpp>
 #include <nall/recompiler/generic/generic.hpp>

ares/n64/rsp/recompiler.cpp

@@ -1,14 +1,11 @@
 auto RSP::Recompiler::pool(u32 address) -> Pool* {
   if(context[address >> 8]) return context[address >> 8];
 
-  nall::Hash::CRC32 hashcode;
-  for(u32 offset : range(256)) {
-    hashcode.input(self.imem.read<Byte>(address + offset));
-  }
+  auto hashcode = XXH3_64bits(self.imem.data + address, 256);
 
   PoolHashPair pair;
   pair.pool = (Pool*)allocator.acquire();
-  pair.hashcode = hashcode.value();
+  pair.hashcode = hashcode;
 
   auto result = pools[address >> 8].find(pair);
   if(result) {