mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 07:09:15 +07:00
be52bbe3ea
__fls will now require a boot time patching on T4 and above. Redefining it under arch/sparc/lib. Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
62 lines
1.0 KiB
ArmAsm
62 lines
1.0 KiB
ArmAsm
/* fls64.S: SPARC default __fls definition.
|
|
*
|
|
* SPARC default __fls definition, which follows the same algorithm as
|
|
* in generic __fls(). This function will be boot time patched on T4
|
|
* and onward.
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/export.h>
|
|
|
|
.text
|
|
.register %g2, #scratch
|
|
.register %g3, #scratch
|
|
ENTRY(__fls)
|
|
mov -1, %g2
|
|
sllx %g2, 32, %g2
|
|
and %o0, %g2, %g2
|
|
brnz,pt %g2, 1f
|
|
mov 63, %g1
|
|
sllx %o0, 32, %o0
|
|
mov 31, %g1
|
|
1:
|
|
mov -1, %g2
|
|
sllx %g2, 48, %g2
|
|
and %o0, %g2, %g2
|
|
brnz,pt %g2, 2f
|
|
mov -1, %g2
|
|
sllx %o0, 16, %o0
|
|
add %g1, -16, %g1
|
|
2:
|
|
mov -1, %g2
|
|
sllx %g2, 56, %g2
|
|
and %o0, %g2, %g2
|
|
brnz,pt %g2, 3f
|
|
mov -1, %g2
|
|
sllx %o0, 8, %o0
|
|
add %g1, -8, %g1
|
|
3:
|
|
sllx %g2, 60, %g2
|
|
and %o0, %g2, %g2
|
|
brnz,pt %g2, 4f
|
|
mov -1, %g2
|
|
sllx %o0, 4, %o0
|
|
add %g1, -4, %g1
|
|
4:
|
|
sllx %g2, 62, %g2
|
|
and %o0, %g2, %g2
|
|
brnz,pt %g2, 5f
|
|
mov -1, %g3
|
|
sllx %o0, 2, %o0
|
|
add %g1, -2, %g1
|
|
5:
|
|
mov 0, %g2
|
|
sllx %g3, 63, %g3
|
|
and %o0, %g3, %o0
|
|
movre %o0, 1, %g2
|
|
sub %g1, %g2, %g1
|
|
jmp %o7+8
|
|
sra %g1, 0, %o0
|
|
ENDPROC(__fls)
|
|
EXPORT_SYMBOL(__fls)
|