vppinfra: native poly1305 implementation
Type: feature
Signed-off-by: Damjan Marion <damarion@cisco.com>
Change-Id: Ic170464d7c63f243e7e676567d41d800647ebec3
diff --git a/src/vppinfra/clib.h b/src/vppinfra/clib.h
index b8257bf..dab7eeb 100644
--- a/src/vppinfra/clib.h
+++ b/src/vppinfra/clib.h
@@ -339,6 +339,44 @@
_x < 0 ? -_x : _x; \
})
+static_always_inline u64
+u64_add_with_carry (u64 *carry, u64 a, u64 b)
+{
+#if defined(__x86_64__)
+ unsigned long long v;
+ *carry = _addcarry_u64 (*carry, a, b, &v);
+ return (u64) v;
+#elif defined(__clang__)
+ unsigned long long c;
+ u64 rv = __builtin_addcll (a, b, *carry, &c);
+ *carry = c;
+ return rv;
+#else
+ u64 rv = a + b + *carry;
+ *carry = rv < a;
+ return rv;
+#endif
+}
+
+static_always_inline u64
+u64_sub_with_borrow (u64 *borrow, u64 x, u64 y)
+{
+#if defined(__x86_64__)
+ unsigned long long v;
+ *borrow = _subborrow_u64 (*borrow, x, y, &v);
+ return (u64) v;
+#elif defined(__clang__)
+ unsigned long long b;
+ u64 rv = __builtin_subcll (x, y, *borrow, &b);
+ *borrow = b;
+ return rv;
+#else
+ unsigned long long rv = x - (y + *borrow);
+ *borrow = rv >= x;
+ return rv;
+#endif
+}
+
/* Standard standalone-only function declarations. */
#ifndef CLIB_UNIX
void clib_standalone_init (void *memory, uword memory_bytes);