Apple aarch64 support (#544)

* aarch64 architecture does not understand fast path. going slow for now

* remove unused imports

* build wheels for both Mac architectures

Author: wilko77

.github/workflows/build_wheels.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, windows-2019, macos-10.15]
+        os: [ubuntu-20.04, windows-2019, macos-11]
 
     steps:
       - uses: actions/checkout@v2
@@ -23,6 +23,7 @@ jobs:
         # to supply options, put them in 'env', like:
         env:
          CIBW_SKIP: '*-win32 *i686'
+         CIBW_ARCHS_MACOS: x86_64 arm64
 
       - uses: actions/upload-artifact@v3
         with:

anonlink/benchmark.py

@@ -1,14 +1,9 @@
 import itertools
 import random
-import operator
 import os
 from timeit import default_timer as timer
 
 import bitarray
-from clkhash.key_derivation import generate_key_lists
-from clkhash.bloomfilter import stream_bloom_filters
-from clkhash.randomnames import NameList
-
 import anonlink
 
 

anonlink/similarities/dice.cpp

@@ -39,7 +39,7 @@ popcount<4>( uint64_t &c0, uint64_t &c1, uint64_t &c2, uint64_t &c3, const uint6
 
 // Although `popcnt` from libpopcount.h works on Linux & MacOS
 // The handrolled assembler is faster for 32 byte buffers
-#if defined (_MSC_VER)
+#if defined (_MSC_VER) || defined(__aarch64__)
     c0 += popcnt(buf, 4*WORD_BYTES);
     c1 += 0; c2 += 0; c3 += 0;
 #else