Added generic Argon2 implementation (conflicts with RandomX).

src/3rdparty/argon2/arch/x86_64/lib/argon2-arch.c

@@ -0,0 +1,41 @@
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "impl-select.h"
+
+#include "cpu-flags.h"
+#include "argon2-sse2.h"
+#include "argon2-ssse3.h"
+#include "argon2-xop.h"
+#include "argon2-avx2.h"
+#include "argon2-avx512f.h"
+
+/* NOTE: there is no portable intrinsic for 64-bit rotate, but any
+ * sane compiler should be able to compile this into a ROR instruction: */
+#define rotr64(x, n) ((x) >> (n)) | ((x) << (64 - (n)))
+
+#include "argon2-template-64.h"
+
+void fill_segment_default(const argon2_instance_t *instance,
+                          argon2_position_t position)
+{
+    fill_segment_64(instance, position);
+}
+
+void argon2_get_impl_list(argon2_impl_list *list)
+{
+    static const argon2_impl IMPLS[] = {
+        { "x86_64",     NULL,           fill_segment_default },
+        { "SSE2",       check_sse2,     fill_segment_sse2 },
+        { "SSSE3",      check_ssse3,    fill_segment_ssse3 },
+        { "XOP",        check_xop,      fill_segment_xop },
+        { "AVX2",       check_avx2,     fill_segment_avx2 },
+        { "AVX-512F",   check_avx512f,  fill_segment_avx512f },
+    };
+
+    cpu_flags_get();
+
+    list->count = sizeof(IMPLS) / sizeof(IMPLS[0]);
+    list->entries = IMPLS;
+}