sparc: csum_add for Sparc

versions.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 24 insertions, 0 deletions

diff --git a/arch/sparc/include/asm/checksum_32.h b/arch/sparc/include/asm/checksum_32.h
index bdbda1453aa9..04471dc64847 100644
--- a/arch/sparc/include/asm/checksum_32.h
+++ b/arch/sparc/include/asm/checksum_32.h
@@ -238,4 +238,16 @@ static inline __sum16 ip_compute_csum(const void *buff, int len)
         return csum_fold(csum_partial(buff, len, 0));
 }
 
+#define HAVE_ARCH_CSUM_ADD
+static inline __wsum csum_add(__wsum csum, __wsum addend)
+{
+        __asm__ __volatile__(
+                "addcc   %0, %1, %0\n"
+                "addx    %0, %%g0, %0"
+                : "=r" (csum)
+                : "r" (addend), "0" (csum));
+
+        return csum;
+}
+
 #endif /* !(__SPARC_CHECKSUM_H) */
diff --git a/arch/sparc/include/asm/checksum_64.h b/arch/sparc/include/asm/checksum_64.h
index 019b9615e43c..2ff81ae8f3af 100644
--- a/arch/sparc/include/asm/checksum_64.h
+++ b/arch/sparc/include/asm/checksum_64.h
@@ -164,4 +164,16 @@ static inline __sum16 ip_compute_csum(const void *buff, int len)
         return csum_fold(csum_partial(buff, len, 0));
 }
 
+#define HAVE_ARCH_CSUM_ADD
+static inline __wsum csum_add(__wsum csum, __wsum addend)
+{
+        __asm__ __volatile__(
+                "addcc   %0, %1, %0\n"
+                "addx    %0, %%g0, %0"
+                : "=r" (csum)
+                : "r" (addend), "0" (csum));
+
+        return csum;
+}
+
 #endif /* !(__SPARC64_CHECKSUM_H) */