macros: add macro to specify a bit mask range

8 years ago · 7d0dcfaae5
parent 159a4e83b4
commit 7d0dcfaae5
1 changed files with 1 additions and 0 deletions
--- a/include/macros.h
+++ b/include/macros.h
@ -30,3 +30,4 @@
 /* Bit manipulation */
 #define BIT_SIZE(t) (CHAR_BIT * sizeof(t))
 #define BIT(n) (1 << (n))
+#define BITS(_start, _end) ((BIT(_end) - BIT(_start)) + BIT(_end))