R2023.05.1 - aktualizacja wykładu

fibb_tsc/fibb_inline.c

@@ -0,0 +1,38 @@
+#include <stdio.h>
+
+// Jan Potocki 2020
+
+unsigned long fibb(unsigned long n);
+
+unsigned long long timestamp()
+{
+    unsigned long long tsc;
+
+    asm volatile(
+        "xor %%eax, %%eax\n"
+        "cpuid\n"
+        "rdtsc"
+        : "=A" (tsc)
+        :
+        : "ebx", "ecx"
+    );
+
+    return tsc;
+}
+
+int main()
+{
+    unsigned long term, result;
+    unsigned long long tstamp1, tstamp2;
+
+    scanf("%lu", &term);
+
+    tstamp1 = timestamp();
+    result = fibb(term);
+    tstamp2 = timestamp();
+
+    printf("Result: %lu\n", result);
+    printf("Cycles: %llu\n", tstamp2-tstamp1);
+
+    return 0;
+}