Commit 2b41ce5d authored Oct 11, 2017 by Vijay Kumar Committed by David S. Miller Nov 15, 2017

sparc64: SPARC optimized __fls function



Defined SPARC optimized __fls using lzcnt opcode.

Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 70cbec0c

arch/sparc/lib/NG4fls.S

+10 −0

Original line number	Original line	Diff line number	Diff line
	@@ -18,3 +18,13 @@ ENTRY(NG4fls)
	retl		retl
	sub %g3, %g2, %o0		sub %g3, %g2, %o0
	ENDPROC(NG4fls)		ENDPROC(NG4fls)

			ENTRY(__NG4fls)
			brz,pn %o0, 1f
			LZCNT_O0_G2 !lzcnt %o0, %g2
			mov 63, %g3
			sub %g3, %g2, %o0
			1:
			retl
			nop
			ENDPROC(__NG4fls)