1 files changed, 32 insertions, 0 deletions
diff --git a/security/nss/lib/freebl/mpi/mpi_amd64.c b/security/nss/lib/freebl/mpi/mpi_amd64.c
new file mode 100644
index 0000000000..9e538bb6a1
--- /dev/null
+++ b/security/nss/lib/freebl/mpi/mpi_amd64.c
@@ -0,0 +1,32 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MPI_AMD64
+#error This file only works on AMD64 platforms.
+#endif
+
+#include <mpi-priv.h>
+
+/*
+ * MPI glue
+ *
+ */
+
+/* Presently, this is only used by the Montgomery arithmetic code. */
+/* c += a * b */
+void MPI_ASM_DECL
+s_mpv_mul_d_add_prop(const mp_digit *a, mp_size a_len,
+                     mp_digit b, mp_digit *c)
+{
+    mp_digit w;
+    mp_digit d;
+
+    d = s_mpv_mul_add_vec64(c, a, a_len, b);
+    c += a_len;
+    while (d) {
+        w = c[0] + d;
+        d = (w < c[0] || w < d);
+        *c++ = w;
+    }
+}