linux-IllusionX/arch/sparc/lib/fls64.S
Masahiro Yamada 4cdb71b6ba sparc: replace #include <asm/export.h> with #include <linux/export.h>
Commit ddb5cdbafa ("kbuild: generate KSYMTAB entries by modpost")
deprecated <asm/export.h>, which is now a wrapper of <linux/export.h>.

Replace #include <asm/export.h> with #include <linux/export.h>.

After all the <asm/export.h> lines are converted, <asm/export.h> and
<asm-generic/export.h> will be removed.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
2023-08-22 18:12:25 +09:00

61 lines
1 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/export.h>
#include <linux/linkage.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)