From 80c25e2602402208d9b8377af605359dc32ab15a Mon Sep 17 00:00:00 2001
From: Mariano Alvira <mar@devl.org>
Date: Wed, 3 Mar 2010 18:46:23 -0500
Subject: [PATCH] add bitfield macros

---
 lib/include/utils.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/lib/include/utils.h b/lib/include/utils.h
index 3f5f10838..5c985feab 100644
--- a/lib/include/utils.h
+++ b/lib/include/utils.h
@@ -14,4 +14,10 @@
 #define clear_bit(val, bit)  (val = (val & ~(1 << bit)))
 #define set_bit(val, bit)  (val = (val | (1 << bit)))
 
+#define ones(num) ( (1<<num) - 1 )
+#define bit_mask(length, shift) (ones(length) << shift)
+#define get_field(val, field) ((val & field##_MASK) >> field)
+//#define bitfield(name, length, shift) ( #define #name length  #define #name##_MASK bit_mask(length, shift))
+#define bitfield(name, length, shift) ( define #name length )
+
 #endif /* UTILS_H */