mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
2b41ce5df2
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>
31 lines
495 B
ArmAsm
31 lines
495 B
ArmAsm
/* 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)
|
|
|
|
ENTRY(__NG4fls)
|
|
brz,pn %o0, 1f
|
|
LZCNT_O0_G2 !lzcnt %o0, %g2
|
|
mov 63, %g3
|
|
sub %g3, %g2, %o0
|
|
1:
|
|
retl
|
|
nop
|
|
ENDPROC(__NG4fls)
|