1 files changed, 49 insertions, 0 deletions
diff --git a/crypto/ec/curve448/arch_ref64/f_impl.h b/crypto/ec/curve448/arch_ref64/f_impl.h
new file mode 100644
index 0000000000..8751ceecd9
--- /dev/null
+++ b/crypto/ec/curve448/arch_ref64/f_impl.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 2014-2016 Cryptography Research, Inc.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ *
+ * Originally written by Mike Hamburg
+ */
+
+#define GF_HEADROOM 9999        /* Everything is reduced anyway */
+#define FIELD_LITERAL(a,b,c,d,e,f,g,h) {{a,b,c,d,e,f,g,h}}
+
+#define LIMB_PLACE_VALUE(i) 56
+
+void gf_add_RAW(gf out, const gf a, const gf b)
+{
+    for (unsigned int i = 0; i < 8; i++)
+        out->limb[i] = a->limb[i] + b->limb[i];
+    gf_weak_reduce(out);
+}
+
+void gf_sub_RAW(gf out, const gf a, const gf b)
+{
+    uint64_t co1 = ((1ull << 56) - 1) * 2, co2 = co1 - 2;
+
+    for (unsigned int i = 0; i < 8; i++)
+        out->limb[i] = a->limb[i] - b->limb[i] + ((i == 4) ? co2 : co1);
+    gf_weak_reduce(out);
+}
+
+void gf_bias(gf a, int amt)
+{
+    (void)a;
+    (void)amt;
+}
+
+void gf_weak_reduce(gf a)
+{
+    uint64_t mask = (1ull << 56) - 1;
+    uint64_t tmp = a->limb[7] >> 56;
+
+    a->limb[4] += tmp;
+    for (unsigned int i = 7; i > 0; i--)
+        a->limb[i] = (a->limb[i] & mask) + (a->limb[i - 1] >> 56);
+    a->limb[0] = (a->limb[0] & mask) + tmp;
+}