#ifndef __LUNAIX_SPIKE_H
#define __LUNAIX_SPIKE_H
-// Some helper functions. As helpful as Spike the Dragon! :)
+#include <lunaix/compiler.h>
+
+/** Some helper functions. As helpful as Spike the Dragon! :) **/
// 除法 v/(2^k) 向上取整
#define CEIL(v, k) (((v) + (1 << (k)) - 1) >> (k))
// 除法 v/(2^k) 向下取整
#define FLOOR(v, k) ((v) >> (k))
-// 获取v最近的最大k倍数
+// 获取v最近的最大k倍数 (k=2^n)
#define ROUNDUP(v, k) (((v) + (k)-1) & ~((k)-1))
-// 获取v最近的最小k倍数
+// 获取v最近的最小k倍数 (k=2^m)
#define ROUNDDOWN(v, k) ((v) & ~((k)-1))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#define is_pot(val) (((val) != 0) || ((val) & ((val)-1)) == 0)
+
/**
* @brief Fast log base 2 for integer, utilizing constant unfolding.
* Adopted from
*
*/
#define ILOG2(x) \
- __builtin_constant_p(x) ? ((x) == 0 ? 0 \
- : ((x) & (1ul << 31)) ? 31 \
- : ((x) & (1ul << 30)) ? 30 \
- : ((x) & (1ul << 29)) ? 29 \
- : ((x) & (1ul << 28)) ? 28 \
- : ((x) & (1ul << 27)) ? 27 \
- : ((x) & (1ul << 26)) ? 26 \
- : ((x) & (1ul << 25)) ? 25 \
- : ((x) & (1ul << 24)) ? 24 \
- : ((x) & (1ul << 23)) ? 23 \
- : ((x) & (1ul << 22)) ? 22 \
- : ((x) & (1ul << 21)) ? 21 \
- : ((x) & (1ul << 20)) ? 20 \
- : ((x) & (1ul << 19)) ? 19 \
- : ((x) & (1ul << 18)) ? 18 \
- : ((x) & (1ul << 17)) ? 17 \
- : ((x) & (1ul << 16)) ? 16 \
- : ((x) & (1ul << 15)) ? 15 \
- : ((x) & (1ul << 14)) ? 14 \
- : ((x) & (1ul << 13)) ? 13 \
- : ((x) & (1ul << 12)) ? 12 \
- : ((x) & (1ul << 11)) ? 11 \
- : ((x) & (1ul << 10)) ? 10 \
- : ((x) & (1ul << 9)) ? 9 \
- : ((x) & (1ul << 8)) ? 8 \
- : ((x) & (1ul << 7)) ? 7 \
- : ((x) & (1ul << 6)) ? 6 \
- : ((x) & (1ul << 5)) ? 5 \
- : ((x) & (1ul << 4)) ? 4 \
- : ((x) & (1ul << 3)) ? 3 \
- : ((x) & (1ul << 2)) ? 2 \
- : ((x) & (1ul << 1)) ? 1 \
- : 0) \
- : (31 - __builtin_clz(x))
-
-#define __USER__ __attribute__((section(".usrtext")))
-
-inline static void
-spin()
-{
- while (1)
- ;
-}
-
-#ifdef __LUNAIXOS_DEBUG__
+ (__builtin_constant_p(x) ? ((x) == 0 ? 0 \
+ : ((x) & (1ul << 31)) ? 31 \
+ : ((x) & (1ul << 30)) ? 30 \
+ : ((x) & (1ul << 29)) ? 29 \
+ : ((x) & (1ul << 28)) ? 28 \
+ : ((x) & (1ul << 27)) ? 27 \
+ : ((x) & (1ul << 26)) ? 26 \
+ : ((x) & (1ul << 25)) ? 25 \
+ : ((x) & (1ul << 24)) ? 24 \
+ : ((x) & (1ul << 23)) ? 23 \
+ : ((x) & (1ul << 22)) ? 22 \
+ : ((x) & (1ul << 21)) ? 21 \
+ : ((x) & (1ul << 20)) ? 20 \
+ : ((x) & (1ul << 19)) ? 19 \
+ : ((x) & (1ul << 18)) ? 18 \
+ : ((x) & (1ul << 17)) ? 17 \
+ : ((x) & (1ul << 16)) ? 16 \
+ : ((x) & (1ul << 15)) ? 15 \
+ : ((x) & (1ul << 14)) ? 14 \
+ : ((x) & (1ul << 13)) ? 13 \
+ : ((x) & (1ul << 12)) ? 12 \
+ : ((x) & (1ul << 11)) ? 11 \
+ : ((x) & (1ul << 10)) ? 10 \
+ : ((x) & (1ul << 9)) ? 9 \
+ : ((x) & (1ul << 8)) ? 8 \
+ : ((x) & (1ul << 7)) ? 7 \
+ : ((x) & (1ul << 6)) ? 6 \
+ : ((x) & (1ul << 5)) ? 5 \
+ : ((x) & (1ul << 4)) ? 4 \
+ : ((x) & (1ul << 3)) ? 3 \
+ : ((x) & (1ul << 2)) ? 2 \
+ : ((x) & (1ul << 1)) ? 1 \
+ : 0) \
+ : (31 - clz(x)))
+
+#ifndef __LUNAIXOS_NASSERT__
#define assert(cond) \
- if (!(cond)) { \
- __assert_fail(#cond, __FILE__, __LINE__); \
- }
+ do { \
+ if (unlikely(!(cond))) { \
+ __assert_fail(#cond, __FILE__, __LINE__); \
+ } \
+ } while(0)
#define assert_msg(cond, msg) \
- if (!(cond)) { \
- __assert_fail(msg, __FILE__, __LINE__); \
- }
+ do { \
+ if (unlikely(!(cond))) { \
+ __assert_fail(msg, __FILE__, __LINE__); \
+ } \
+ } while(0)
+
+#define must_success(statement) \
+ do { \
+ int err = (statement); \
+ if (err) fail(#statement " failed"); \
+ } while(0)
+
+#define fail(msg) __assert_fail(msg, __FILE__, __LINE__);
+
void
__assert_fail(const char* expr, const char* file, unsigned int line)
- __attribute__((noinline, noreturn));
+ __attribute__((noinline, noreturn));
#else
#define assert(cond) (void)(cond); // assert nothing
#define assert_msg(cond, msg) (void)(cond); // assert nothing
-#endif
-void
+#endif // __LUNAIXOS_NASSERT__
+
+void noret
panick(const char* msg);
#define wait_until(cond) \
git://scm.lunaixsky.com / lunaix-os.git / blobdiff