summaryrefslogtreecommitdiffstats
path: root/arch/sparc/lib/NG4fls.S
blob: 2d0991e5b03417c4993e118e6f424385d4ec54e1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
/* 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)