fixed division, undefined behaviors and some improvements (#33)

* testing using ctest

* emove old testing script

* added github workflow CI

* updated CI

* added unit test for macros

* F16() and F16C() are both rounding allways, so fix16_from_dbl should as well

* added tests for strign operations, but these functions are in my opinion unreliable and tests are failing

* removed old unittests

* removed old unittests from cmake

* problem with division using gcc

* improved benchmark

* clarification of problem with division

* attempt to fix

* fixed some undefined behaviors, fixed division

1 files changed, 12 insertions, 0 deletions

diff --git a/benchmarks/interface.c b/benchmarks/interface.c
new file mode 100644
index 0000000..7f37648
--- /dev/null
+++ b/benchmarks/interface.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+#include "interface.h"
+
+void print_value(const char *label, int32_t value)
+{
+    printf("%-20s %6ld\n", label, value);
+}
+
+void print(const char *label, cyclecount_t *count)
+{
+    printf("%-20s %6ld %6ld %6ld\n",label,count->min, count->sum / count->count, count->max);
+}