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| author | Vijay Kumar <vijay.ac.kumar@oracle.com> | 2017-10-11 21:50:05 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-11-15 08:26:46 +0300 |
| commit | 2b41ce5df20b698436526fcd8478094140b91706 (patch) | |
| tree | f582e33569b181aaa96280339866d80327b2d9f6 /arch/sparc/lib | |
| parent | 70cbec0c53739e170ea9c418e740f007ab5bca52 (diff) | |
| download | linux-2b41ce5df20b698436526fcd8478094140b91706.tar.xz | |
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>
Diffstat (limited to 'arch/sparc/lib')
| -rw-r--r-- | 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 bc17b65f1052..2d0991e5b034 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) |