day 7

day0.h

@@ -12,27 +12,36 @@ ch test[] = {
 #embed "day0_test.txt"
 };
 
+alignas(0x40) static
+struct {
+    line padstart[4];
+    struct { ch *s; num _extra[7]; };
+    union { line l; struct { ch s[16]; num n; }; } result;
+    line padend;
+} m;
+static_assert(offsetof(typeof(m),result) % 64 == 0);
+static_assert(offsetof(typeof(m),padend) % 64 == 0);
 
 static
 num do_part1(size_t file_len, ch file[file_len]) {
-    ch *s = file;
-    num result = 0;
+    m = (typeof(m)){ };
+    m.s = file;
+    m.result.n = 0;
 
 #if DBG
     print("\n");
 #endif
 
 do {
-    s++;
-} while (s != &file[file_len]);
+    m.s++;
+} while (m.s != &file[file_len]);
 
-    return result;
+    return m.result.n;
 }
 
 static
 num do_part2(size_t file_len, ch file[file_len]) {
-    num result = 0;
-    return result;
+    return 0;
 }
 
 #define RUN_TEST1 1