This imports {lower,upper}_32_bits defines to allow to get upper
and lower 32b part of a 64b number.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx>
---
To: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Cc: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
Cc: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxxxxxxxxxx>
Cc: barebox@xxxxxxxxxxxxxxxxxxx
---
include/common.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/include/common.h b/include/common.h
index ca817aac4f06..de635718d2fe 100644
--- a/include/common.h
+++ b/include/common.h
@@ -282,6 +282,22 @@ void barebox_set_hostname(const char *);
} \
)
+/**
+ * upper_32_bits - return bits 32-63 of a number
+ * @n: the number we're accessing
+ *
+ * A basic shift-right of a 64- or 32-bit quantity. Use this to suppress
+ * the "right shift count >= width of type" warning when that quantity is
+ * 32-bits.
+ */
+#define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
+
+/**
+ * lower_32_bits - return bits 0-31 of a number
+ * @n: the number we're accessing
+ */
+#define lower_32_bits(n) ((u32)(n))
+
#define abs(x) ({ \
long __x = (x); \
(__x < 0) ? -__x : __x; \
--
2.0.0
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