1 files changed, 33 insertions, 0 deletions
diff --git a/string/include/benchlib.h b/string/include/benchlib.h
new file mode 100644
index 000000000000..0f2ce2eb6bce
--- /dev/null
+++ b/string/include/benchlib.h
@@ -0,0 +1,33 @@
+/*
+ * Benchmark support functions.
+ *
+ * Copyright (c) 2020, Arm Limited.
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <stdint.h>
+#include <time.h>
+
+/* Fast and accurate timer returning nanoseconds.  */
+static inline uint64_t
+clock_get_ns (void)
+{
+  struct timespec ts;
+  clock_gettime (CLOCK_MONOTONIC, &ts);
+  return ts.tv_sec * (uint64_t) 1000000000 + ts.tv_nsec;
+}
+
+/* Fast 32-bit random number generator.  Passing a non-zero seed
+   value resets the internal state.  */
+static inline uint32_t
+rand32 (uint32_t seed)
+{
+  static uint64_t state = 0xb707be451df0bb19ULL;
+  if (seed != 0)
+    state = seed;
+  uint32_t res = state >> 32;
+  state = state * 6364136223846793005ULL + 1;
+  return res;
+}
+
+