Simulated int128 type.

src/int128_impl.h

@@ -0,0 +1,19 @@
+#ifndef SECP256K1_INT128_IMPL_H
+#define SECP256K1_INT128_IMPL_H
+
+#include "int128.h"
+#include "util.h"
+
+#if defined HAVE_CONFIG_H
+#include "libsecp256k1-config.h"
+#endif
+
+#if defined(SECP256K1_INT128_NATIVE)
+#include "int128_native_impl.h"
+#elif defined(SECP256K1_INT128_STRUCT)
+#include "int128_struct_impl.h"
+#else
+#error "Please select int128 implementation"
+#endif
+
+#endif