linux-kernel - [PATCH v2 09/30] Add tile-specific parity functions

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Message-Id: <1459933716-6990-1-git-send-email-zengzhaoxiu@163.com>
Date:	Wed,  6 Apr 2016 17:08:36 +0800
From:	zengzhaoxiu@....com
To:	cmetcalf@...lanox.com
Cc:	linux-kernel@...r.kernel.org, Zhaoxiu Zeng <zhaoxiu.zeng@...il.com>
Subject: [PATCH v2 09/30] Add tile-specific parity functions

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

Signed-off-by: Zhaoxiu Zeng <zhaoxiu.zeng@...il.com>
---
 arch/tile/include/asm/bitops.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/tile/include/asm/bitops.h b/arch/tile/include/asm/bitops.h
index 20caa34..370d007 100644
--- a/arch/tile/include/asm/bitops.h
+++ b/arch/tile/include/asm/bitops.h
@@ -81,10 +81,36 @@ static inline unsigned long __arch_hweight64(__u64 w)
 	return __builtin_popcountll(w);
 }
 
+static inline unsigned int __arch_parity32(unsigned int w)
+{
+	return __builtin_popcount(w) & 1;
+}
+
+static inline unsigned int __arch_parity16(unsigned int w)
+{
+	return __arch_parity32(w & 0xffff);
+}
+
+static inline unsigned int __arch_parity8(unsigned int w)
+{
+	return __arch_parity32(w & 0xff);
+}
+
+static inline unsigned int __arch_parity4(unsigned int w)
+{
+	return __arch_parity32(w & 0xf);
+}
+
+static inline unsigned int __arch_parity64(__u64 w)
+{
+	return (unsigned int)__builtin_popcountll(w) & 1;
+}
+
 #include <asm-generic/bitops/builtin-__ffs.h>
 #include <asm-generic/bitops/builtin-__fls.h>
 #include <asm-generic/bitops/builtin-ffs.h>
 #include <asm-generic/bitops/const_hweight.h>
+#include <asm-generic/bitops/const_parity.h>
 #include <asm-generic/bitops/lock.h>
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/sched.h>
-- 
2.5.0