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-rw-r--r--arch/sparc/lib/Makefile1
-rw-r--r--arch/sparc/lib/NG4fls.S20
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/sparc/lib/Makefile b/arch/sparc/lib/Makefile
index 5380c5985420..2823b8e530ed 100644
--- a/arch/sparc/lib/Makefile
+++ b/arch/sparc/lib/Makefile
@@ -18,6 +18,7 @@ lib-$(CONFIG_SPARC32) += muldi3.o bitext.o cmpdi2.o
lib-$(CONFIG_SPARC64) += multi3.o
lib-$(CONFIG_SPARC64) += fls.o
lib-$(CONFIG_SPARC64) += fls64.o
+obj-$(CONFIG_SPARC64) += NG4fls.o
lib-$(CONFIG_SPARC64) += copy_page.o clear_page.o bzero.o
lib-$(CONFIG_SPARC64) += csum_copy.o csum_copy_from_user.o csum_copy_to_user.o
diff --git a/arch/sparc/lib/NG4fls.S b/arch/sparc/lib/NG4fls.S
new file mode 100644
index 000000000000..bc17b65f1052
--- /dev/null
+++ b/arch/sparc/lib/NG4fls.S
@@ -0,0 +1,20 @@
+/* NG4fls.S: SPARC optimized fls and __fls for T4 and above.
+ *
+ * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#include <linux/linkage.h>
+
+#define LZCNT_O0_G2 \
+ .word 0x85b002e8
+
+ .text
+ .register %g2, #scratch
+ .register %g3, #scratch
+
+ENTRY(NG4fls)
+ LZCNT_O0_G2 !lzcnt %o0, %g2
+ mov 64, %g3
+ retl
+ sub %g3, %g2, %o0
+ENDPROC(NG4fls)