mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-27 11:55:53 +00:00
18269c0fd4
Identical named files renamed to <name>_32.S Refactored Makefile to prepare for unification. Linking order was altered slightly - but this is a lib.a file so it should not matter. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
82 lines
1.3 KiB
ArmAsm
82 lines
1.3 KiB
ArmAsm
/* strlen.S: Sparc optimized strlen code
|
|
* Hand optimized from GNU libc's strlen
|
|
* Copyright (C) 1991,1996 Free Software Foundation
|
|
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
|
|
* Copyright (C) 1996 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
|
|
*/
|
|
|
|
#define LO_MAGIC 0x01010101
|
|
#define HI_MAGIC 0x80808080
|
|
|
|
0:
|
|
ldub [%o0], %o5
|
|
cmp %o5, 0
|
|
be 1f
|
|
add %o0, 1, %o0
|
|
andcc %o0, 3, %g0
|
|
be 4f
|
|
or %o4, %lo(HI_MAGIC), %o3
|
|
ldub [%o0], %o5
|
|
cmp %o5, 0
|
|
be 2f
|
|
add %o0, 1, %o0
|
|
andcc %o0, 3, %g0
|
|
be 5f
|
|
sethi %hi(LO_MAGIC), %o4
|
|
ldub [%o0], %o5
|
|
cmp %o5, 0
|
|
be 3f
|
|
add %o0, 1, %o0
|
|
b 8f
|
|
or %o4, %lo(LO_MAGIC), %o2
|
|
1:
|
|
retl
|
|
mov 0, %o0
|
|
2:
|
|
retl
|
|
mov 1, %o0
|
|
3:
|
|
retl
|
|
mov 2, %o0
|
|
|
|
.align 4
|
|
.global strlen
|
|
strlen:
|
|
mov %o0, %o1
|
|
andcc %o0, 3, %g0
|
|
bne 0b
|
|
sethi %hi(HI_MAGIC), %o4
|
|
or %o4, %lo(HI_MAGIC), %o3
|
|
4:
|
|
sethi %hi(LO_MAGIC), %o4
|
|
5:
|
|
or %o4, %lo(LO_MAGIC), %o2
|
|
8:
|
|
ld [%o0], %o5
|
|
2:
|
|
sub %o5, %o2, %o4
|
|
andcc %o4, %o3, %g0
|
|
be 8b
|
|
add %o0, 4, %o0
|
|
|
|
/* Check every byte. */
|
|
srl %o5, 24, %g5
|
|
andcc %g5, 0xff, %g0
|
|
be 1f
|
|
add %o0, -4, %o4
|
|
srl %o5, 16, %g5
|
|
andcc %g5, 0xff, %g0
|
|
be 1f
|
|
add %o4, 1, %o4
|
|
srl %o5, 8, %g5
|
|
andcc %g5, 0xff, %g0
|
|
be 1f
|
|
add %o4, 1, %o4
|
|
andcc %o5, 0xff, %g0
|
|
bne,a 2b
|
|
ld [%o0], %o5
|
|
add %o4, 1, %o4
|
|
1:
|
|
retl
|
|
sub %o4, %o1, %o0
|