Messages in this thread Patch in this message | | | From | Vijay Kumar <> | Subject | [PATCH v4 4/5] sparc64: SPARC optimized __fls function | Date | Wed, 11 Oct 2017 12:50:05 -0600 |
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Defined SPARC optimized __fls using lzcnt opcode.
Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com> --- arch/sparc/lib/NG4fls.S | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/arch/sparc/lib/NG4fls.S b/arch/sparc/lib/NG4fls.S index bc17b65..2d0991e 100644 --- a/arch/sparc/lib/NG4fls.S +++ b/arch/sparc/lib/NG4fls.S @@ -18,3 +18,13 @@ ENTRY(NG4fls) retl sub %g3, %g2, %o0 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) -- 1.7.1
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