1 files changed, 31 insertions, 0 deletions
diff --git a/software/dhrystone/dhry_stubs.c b/software/dhrystone/dhry_stubs.c
new file mode 100644
index 0000000..d384bf1
--- /dev/null
+++ b/software/dhrystone/dhry_stubs.c
@@ -0,0 +1,31 @@
+#include "platform.h"
+
+/* The functions in this file are only meant to support Dhrystone on an
+ * embedded RV32 system and are obviously incorrect in general. */
+
+// return the cycle counter as though it were the current time
+long time(void)
+{
+  long t;
+  asm volatile ("csrr %0, mcycle" : "=r" (t));
+  return t / (get_cpu_freq() / 1000);
+}
+
+// set the number of dhrystone iterations
+void scanf(const char* fmt, int* n)
+{
+  *n = 1500000;
+}
+
+// simple memory allocator
+void* malloc(unsigned long sz)
+{
+  extern void* sbrk(long);
+  void* res = sbrk(sz);
+  if ((long)res == -1)
+    return 0;
+  return res;
+}
+
+// simple memory deallocator
+void free(void* ptr) {}