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)
|