Define zmm_vector<size_t> on macOS

Author: Raghuveer Devulapalli

src/avx512-64bit-common.h

@@ -912,6 +912,19 @@ struct zmm_vector<uint64_t> {
                 left_addr, right_addr, k, reg);
     }
 };
+
+/*
+ * workaround on 64-bit macOS which defines size_t as unsigned long and defines
+ * uint64_t as unsigned long long, both of which are 8 bytes
+ */
+#if defined(__APPLE__) && defined(__x86_64__)
+static_assert(sizeof(size_t) == sizeof(uint64_t),
+              "Size of size_t and uint64_t are not the same");
+template <>
+struct zmm_vector<size_t> : public zmm_vector<uint64_t> {
+};
+#endif
+
 template <>
 struct zmm_vector<double> {
     using type_t = double;

src/xss-common-includes.h

@@ -90,15 +90,7 @@ constexpr bool always_false = false;
 #define NETWORK_32BIT_6 11, 10, 9, 8, 15, 14, 13, 12, 3, 2, 1, 0, 7, 6, 5, 4
 #define NETWORK_32BIT_7 7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, 8
 
-/*
- * workaround on 64-bit macOS which defines size_t as unsigned long and defines
- * uint64_t as unsigned long long, both of which are 8 bytes
- */
-#if defined(__APPLE__) && defined(__x86_64__)
-typedef uint64_t arrsize_t;
-#else
 typedef size_t arrsize_t;
-#endif
 
 template <typename type>
 struct zmm_vector;