Updated with bit macros.

2008-11-04 22:30:10 +00:00
parent 335c07c367
commit 2284a70bc2
1 changed files with 12 additions and 0 deletions
@@ -70,4 +70,16 @@
 #define BIT30     (0x40000000UL)
 #define BIT31     (0x80000000UL)

+/* a=register, b=bit number to act upon 0-n */
+#define BIT_SET(a,b) ((a) |= (1<<(b)))
+#define BIT_CLEAR(a,b) ((a) &= ~(1<<(b)))
+#define BIT_FLIP(a,b) ((a) ^= (1<<(b)))
+#define BIT_CHECK(a,b) ((a) & (1<<(b)))
+
+/* x=target variable, y=mask */
+#define BITMASK_SET(x,y) ((x) |= (y))
+#define BITMASK_CLEAR(x,y) ((x) &= (~(y)))
+#define BITMASK_FLIP(x,y) ((x) ^= (y))
+#define BITMASK_CHECK(x,y) ((x) & (y))
+
 #endif