[PATCH 06/31] Add ia64-specific parity functions

zhaoxiu.zeng
2016-03-27T06:00:36Z

arch/ia64/include/asm/bitops.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/arch/ia64/include/asm/bitops.h b/arch/ia64/include/asm/bitops.h
index 71e8145..de13d89 100644
--- a/arch/ia64/include/asm/bitops.h
+++ b/arch/ia64/include/asm/bitops.h
@@ -439,6 +439,22 @@ static __inline__ unsigned long __arch_hweight64(unsigned long x)

#include <asm-generic/bitops/const_hweight.h>

+/*
+ * parityN: returns the parity of a N-bit word,
+ * i.e. the number of 1-bits in x modulo 2.
+ */
+static __inline__ unsigned int __arch_parity64(unsigned long x)
+{
+ return (unsigned int)ia64_popcnt(x) & 1;
+}
+
+#define __arch_parity32(x) ((unsigned int) __arch_parity64((x) & 0xfffffffful))
+#define __arch_parity16(x) ((unsigned int) __arch_parity64((x) & 0xfffful))
+#define __arch_parity8(x) ((unsigned int) __arch_parity64((x) & 0xfful))
+#define __arch_parity4(x) ((unsigned int) __arch_parity64((x) & 0xful))
+
+#include <asm-generic/bitops/const_parity.h>
+
#endif /* __KERNEL__ */

#include <asm-generic/bitops/find.h>
--
2.5.5