Introduce macros:
1. RTE_SHIFT_VAL64: get the uint64_t value which shifted by nr.
2. RTE_SHIFT_VAL32: get the uint32_t value which shifted by nr.
3. RTE_GENMASK64: generate a contiguous 64bit bitmask starting at bit
position low and ending at position high.
4. RTE_GENMASK32: generate a contiguous 32bit bitmask starting at bit
position low and ending at position high.
5. RTE_FIELD_GET64: extract a 64bit field element.
6. RTE_FIELD_GET32: extract a 32bit field element.
Signed-off-by: Chengwen Feng <fengcheng...@huawei.com>
---
lib/eal/include/rte_bitops.h | 64 ++++++++++++++++++++++++++++++++++++
1 file changed, 64 insertions(+)
diff --git a/lib/eal/include/rte_bitops.h b/lib/eal/include/rte_bitops.h
index 6bd8bae21a..bab08d53ec 100644
--- a/lib/eal/include/rte_bitops.h
+++ b/lib/eal/include/rte_bitops.h
@@ -39,6 +39,70 @@ extern "C" {
*/
#define RTE_BIT32(nr) (UINT32_C(1) << (nr))
+/**
+ * Get the uint64_t value which shifted by nr.
+ *
+ * @param val
+ * The value to be shifted.
+ * @param nr
+ * The bit number in range of 0 to (64 - width of val).
+ */
+#define RTE_SHIFT_VAL64(val, nr) (UINT64_C(val) << (nr))
+
+/**
+ * Get the uint32_t value which shifted by nr.
+ *
+ * @param val
+ * The value to be shifted.
+ * @param nr
+ * The bit number in range of 0 to (32 - width of val).
+ */
+#define RTE_SHIFT_VAL32(val, nr) (UINT32_C(val) << (nr))
+
+/**
+ * Generate a contiguous 64bit bitmask starting at bit position low
+ * and ending at position high.
+ *
+ * @param high
+ * High bit position.
+ * @param low
+ * Low bit position.
+ */
+#define RTE_GENMASK64(high, low) (((~UINT64_C(0)) << (low)) & (~UINT64_C(0) >>
(63u - (high))))
+
+/**
+ * Generate a contiguous 32bit bitmask starting at bit position low
+ * and ending at position high.
+ *
+ * @param high
+ * High bit position.
+ * @param low
+ * Low bit position.
+ */
+#define RTE_GENMASK32(high, low) (((~UINT32_C(0)) << (low)) & (~UINT32_C(0) >>
(31u - (high))))
+
+/**
+ * Extract a 64bit field element.
+ *
+ * @param mask
+ * shifted mask.
+ * @param reg
+ * value of entire bitfield.
+ */
+#define RTE_FIELD_GET64(mask, reg) \
+ ((typeof(mask))(((reg) & (mask)) >> rte_ctz64(mask)))
+
+/**
+ * Extract a 32bit field element.
+ *
+ * @param mask
+ * shifted mask.
+ * @param reg
+ * value of entire bitfield.
+ */
+#define RTE_FIELD_GET32(mask, reg) \
+ ((typeof(mask))(((reg) & (mask)) >> rte_ctz32(mask)))
+
/*------------------------ 32-bit relaxed operations ------------------------*/
/**
--
2.17.1
