Unified codebase for TX28, TX48, TX51, TX53

[karo-tx-uboot.git] / include / common.h

diff --git a/include/common.h b/include/common.h
index 4b5841ef47015925cd78cebe5c2e0c07ac8445af..ff7126d35d836b53d8153c6063904b92b4407299 100644 (file)
--- a/include/common.h
+++ b/include/common.h
@@ -222,6 +222,31 @@ typedef void (interrupt_handler_t)(void *);
 #define MIN(x, y)  min(x, y)
 #define MAX(x, y)  max(x, y)
 
+/*
+ * Return the absolute value of a number.
+ *
+ * This handles unsigned and signed longs, ints, shorts and chars.  For all
+ * input types abs() returns a signed long.
+ *
+ * For 64-bit types, use abs64()
+ */
+#define abs(x) ({                                              \
+               long ret;                                       \
+               if (sizeof(x) == sizeof(long)) {                \
+                       long __x = (x);                         \
+                       ret = (__x < 0) ? -__x : __x;           \
+               } else {                                        \
+                       int __x = (x);                          \
+                       ret = (__x < 0) ? -__x : __x;           \
+               }                                               \
+               ret;                                            \
+       })
+
+#define abs64(x) ({                            \
+               s64 __x = (x);                  \
+               (__x < 0) ? -__x : __x;         \
+       })
+
 #if defined(CONFIG_ENV_IS_EMBEDDED)
 #define TOTAL_MALLOC_LEN       CONFIG_SYS_MALLOC_LEN
 #elif ( ((CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) < CONFIG_SYS_MONITOR_BASE) || \