[Xen-devel] [PATCH 01/20] xen/const: Introduce _BITUL and _BITULL

[Julien Grall <julien.grall@xxxxxxx>]

The pattern _AC(1, UL{,L}) << X is commonly used in the headers to make
define usuable in both assembly and C.

So introduce _BITUL and _BITULL to make the code slightly more readable.

The idea has been taken from Linux (see include/uapi/linux.h).

Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
---
 xen/include/xen/const.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/xen/include/xen/const.h b/xen/include/xen/const.h
index 0d5b2c64f5..b4b067bffa 100644
--- a/xen/include/xen/const.h
+++ b/xen/include/xen/const.h
@@ -21,4 +21,7 @@
 #define _AT(T,X)       ((T)(X))
 #endif
 
+#define _BITUL(x)      (_AC(1, UL) << (x))
+#define _BITULL(x)     (_AC(1, ULL) << (x))
+
 #endif /* __XEN_CONST_H__ */
-- 
2.11.0


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