mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-25 02:48:21 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
110 lines
1.6 KiB
ArmAsm
110 lines
1.6 KiB
ArmAsm
/* strlen_user.S: Sparc optimized strlen_user code
|
|
*
|
|
* Return length of string in userspace including terminating 0
|
|
* or 0 for error
|
|
*
|
|
* 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
|
|
|
|
10:
|
|
ldub [%o0], %o5
|
|
cmp %o5, 0
|
|
be 1f
|
|
add %o0, 1, %o0
|
|
andcc %o0, 3, %g0
|
|
be 4f
|
|
or %o4, %lo(HI_MAGIC), %o3
|
|
11:
|
|
ldub [%o0], %o5
|
|
cmp %o5, 0
|
|
be 2f
|
|
add %o0, 1, %o0
|
|
andcc %o0, 3, %g0
|
|
be 5f
|
|
sethi %hi(LO_MAGIC), %o4
|
|
12:
|
|
ldub [%o0], %o5
|
|
cmp %o5, 0
|
|
be 3f
|
|
add %o0, 1, %o0
|
|
b 13f
|
|
or %o4, %lo(LO_MAGIC), %o2
|
|
1:
|
|
retl
|
|
mov 1, %o0
|
|
2:
|
|
retl
|
|
mov 2, %o0
|
|
3:
|
|
retl
|
|
mov 3, %o0
|
|
|
|
.align 4
|
|
.global __strlen_user, __strnlen_user
|
|
__strlen_user:
|
|
sethi %hi(32768), %o1
|
|
__strnlen_user:
|
|
mov %o1, %g1
|
|
mov %o0, %o1
|
|
andcc %o0, 3, %g0
|
|
bne 10b
|
|
sethi %hi(HI_MAGIC), %o4
|
|
or %o4, %lo(HI_MAGIC), %o3
|
|
4:
|
|
sethi %hi(LO_MAGIC), %o4
|
|
5:
|
|
or %o4, %lo(LO_MAGIC), %o2
|
|
13:
|
|
ld [%o0], %o5
|
|
2:
|
|
sub %o5, %o2, %o4
|
|
andcc %o4, %o3, %g0
|
|
bne 82f
|
|
add %o0, 4, %o0
|
|
sub %o0, %o1, %g2
|
|
81: cmp %g2, %g1
|
|
blu 13b
|
|
mov %o0, %o4
|
|
ba,a 1f
|
|
|
|
/* Check every byte. */
|
|
82: srl %o5, 24, %g5
|
|
andcc %g5, 0xff, %g0
|
|
be 1f
|
|
add %o0, -3, %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 81b
|
|
sub %o0, %o1, %g2
|
|
|
|
add %o4, 1, %o4
|
|
1:
|
|
retl
|
|
sub %o4, %o1, %o0
|
|
|
|
.section .fixup,#alloc,#execinstr
|
|
.align 4
|
|
9:
|
|
retl
|
|
clr %o0
|
|
|
|
.section __ex_table,#alloc
|
|
.align 4
|
|
|
|
.word 10b, 9b
|
|
.word 11b, 9b
|
|
.word 12b, 9b
|
|
.word 13b, 9b
|