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[bertos.git] / compiler.h

diff --git a/compiler.h b/compiler.h
index 0f6e8f7b423dcd81e79556e58005f53470ed077c..a2689e8e46b770ee417a2a861d714140b3e20c8d 100755 (executable)
--- a/compiler.h
+++ b/compiler.h
@@ -15,6 +15,9 @@
 
 /*
  * $Log$
+ * Revision 1.13  2004/08/02 20:20:29  aleph
+ * Merge from project_ks
+ *
  * Revision 1.12  2004/08/01 01:21:17  bernie
  * LIKELY(), UNLIKELY(): New compiler-specific macros.
  *
@@ -256,9 +259,29 @@
 
 
 /* Simple macros */
-#define ABS(a)      (((a) < 0) ? -(a) : (a))
-#define MIN(a,b)    (((a) < (b)) ? (a) : (b))
-#define MAX(a,b)    (((a) > (b)) ? (a) : (b))
+#if GNUC_PREREQ(2,0)
+       #define ABS(n) ({ \
+               __typeof__(n) _n = (n); \
+               (_n < 0) ? -_n : _n; \
+       })
+       #define MIN(a,b) ({ \
+               __typeof__(a) _a = (a); \
+               __typeof__(b) _b = (b); \
+               (void)(&_a == &_b); /* ensure same type */ \
+               (_a < _b) ? _a : _b; \
+       })
+       #define MAX(a,b) ({ \
+               __typeof__(a) _a = (a); \
+               __typeof__(b) _b = (b); \
+               (void)(&_a == &_b); /* ensure same type */ \
+               (_a > _b) ? _a : _b; \
+       })
+#else /* !GNUC */
+       /* Buggy macros for inferior compilers */
+       #define ABS(a)          (((a) < 0) ? -(a) : (a))
+       #define MIN(a,b)        (((a) < (b)) ? (a) : (b))
+       #define MAX(a,b)        (((a) > (b)) ? (a) : (b))
+#endif /* !GNUC */
 
 #ifndef BV
 /*! Convert a bit value to a binary flag */