1 files changed, 12 insertions, 0 deletions
diff --git a/ext/ed25519-amd64-asm/sc25519_mul.c b/ext/ed25519-amd64-asm/sc25519_mul.c
new file mode 100644
index 00000000..ca4d5baa
--- /dev/null
+++ b/ext/ed25519-amd64-asm/sc25519_mul.c
@@ -0,0 +1,12 @@
+#include "sc25519.h"
+
+#define ull4_mul        crypto_sign_ed25519_amd64_64_ull4_mul
+
+extern void ull4_mul(unsigned long long r[8], const unsigned long long x[4], const unsigned long long y[4]);
+
+void sc25519_mul(sc25519 *r, const sc25519 *x, const sc25519 *y)
+{
+  unsigned long long t[8];
+  ull4_mul(t, x->v, y->v);
+  sc25519_barrett(r, t);
+}