Import Curve 448 support

[openssl.git] / crypto / ec / curve448 / include / arch_ref64 / arch_intrinsics.h

diff --git a/crypto/ec/curve448/include/arch_ref64/arch_intrinsics.h b/crypto/ec/curve448/include/arch_ref64/arch_intrinsics.h
new file mode 100644 (file)
index 0000000..4b34ea5
--- /dev/null
+++ b/crypto/ec/curve448/include/arch_ref64/arch_intrinsics.h
@@ -0,0 +1,22 @@
+/* Copyright (c) 2016 Cryptography Research, Inc.
+ * Released under the MIT License.  See LICENSE.txt for license information.
+ */
+
+#ifndef __ARCH_REF64_ARCH_INTRINSICS_H__
+#define __ARCH_REF64_ARCH_INTRINSICS_H__
+
+#define ARCH_WORD_BITS 64
+
+static __inline__ __attribute((always_inline,unused))
+uint64_t word_is_zero(uint64_t a) {
+    /* let's hope the compiler isn't clever enough to optimize this. */
+    return (((__uint128_t)a)-1)>>64;
+}
+
+static __inline__ __attribute((always_inline,unused))
+__uint128_t widemul(uint64_t a, uint64_t b) {
+    return ((__uint128_t)a) * b; 
+}
+
+#endif /* ARCH_REF64_ARCH_INTRINSICS_H__ */
+