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Operating System: Ubuntu 22.04.2 LTS
          Kernel: Linux 5.19.0-45-generic
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 15:14:42 up 14 min,  1 user,  load average: 0.55, 0.50, 0.35

asm/asm-impl.c

@@ -2,17 +2,31 @@
 #include <string.h>
 
 int64_t asm_add(int64_t a, int64_t b) {
-  return a + b;
+  asm(
+    "add %[b], %[a] \t"
+    :[a] "+r" (a)
+    :[b] "r" (b)
+  );
+  return a;
 }
 
 int asm_popcnt(uint64_t x) {
   int s = 0;
+  int i = 0;
   for (int i = 0; i < 64; i++) {
     if ((x >> i) & 1) s++;
   }
   return s;
 }
 
+/*int asm_popcnt(uint64_t x) {
+  int s = 0;
+  for (int i = 0; i < 64; i++) {
+    if ((x >> i) & 1) s++;
+  }
+  return s;
+}*/
+
 void *asm_memcpy(void *dest, const void *src, size_t n) {
   return memcpy(dest, src, n);
 }