some progress

2026-10-07 11:21:21 +03:00
parent 14062e9d00
commit 8d502173a2
26 changed files with 705 additions and 212 deletions
@@ -6,23 +6,28 @@

 /* How many bits needed to represent a given number */
 /* Alternitive semntic: nearest upper power of two */
-static inline int com_bits_needed(uint32_t v) {
-#ifdef COM_DEF_COMPILE_MODERN
+static inline uint8_t com_bits_needed(uint32_t v) {
+  // #ifdef COM_DEF_COMPILE_MODERN
  return v == 0 ? 1 : 32 - __builtin_clz(v);
-#else
-#endif
-  if (v == 0)
-    return 1;
+  // #else
+  // #endif
+  //   if (v == 0)
+  //     return 1;

-  v--;
-  v |= v >> 1;
-  v |= v >> 2;
-  v |= v >> 4;
-  v |= v >> 8;
-  v |= v >> 16;
-  v++;
+  //   v--;
+  //   v |= v >> 1;
+  //   v |= v >> 2;
+  //   v |= v >> 4;
+  //   v |= v >> 8;
+  //   v |= v >> 16;
+  //   v++;

-  return v;
+  //   return v;
+}
+
+/* Next aligned value. */
+static inline uint32_t com_bits_nalign(uint32_t v, uint8_t a) {
+  return (v + (a - 1)) & ~(a - 1);
 }

 #endif