From: zengzhaoxiu@163.com
To: tony.luck@intel.com, fenghua.yu@intel.com
Cc: linux-ia64@vger.kernel.org, linux-kernel@vger.kernel.org,
        Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>
Subject: [PATCH v2 05/30] Add ia64-specific parity functions
Date: Wed,  6 Apr 2016 16:57:37 +0800
Message-Id: <1459933057-6682-1-git-send-email-zengzhaoxiu@163.com>
In-Reply-To: <57031D9D.801@gmail.com>
References: <57031D9D.801@gmail.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1354
Lines: 52

From: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>

Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@gmail.com>
---
 arch/ia64/include/asm/bitops.h | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/ia64/include/asm/bitops.h b/arch/ia64/include/asm/bitops.h
index 71e8145..041d1d6 100644
--- a/arch/ia64/include/asm/bitops.h
+++ b/arch/ia64/include/asm/bitops.h
@@ -439,6 +439,37 @@ 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;
+}
+
+static __inline__ unsigned int __arch_parity32(unsigned int x)
+{
+	return __arch_parity64((unsigned long)x << 32);
+}
+
+static __inline__ unsigned int __arch_parity16(unsigned int x)
+{
+	return __arch_parity64((unsigned long)x << 48);
+}
+
+static __inline__ unsigned int __arch_parity8(unsigned int x)
+{
+	return __arch_parity64((unsigned long)x << 56);
+}
+
+static __inline__ unsigned int __arch_parity4(unsigned int x)
+{
+	return __arch_parity64((unsigned long)x << 60);
+}
+
+#include <asm-generic/bitops/const_parity.h>
+
 #endif /* __KERNEL__ */
 
 #include <asm-generic/bitops/find.h>
-- 
2.5.0