/* | |
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) | |
* | |
* This program is free software; you can redistribute it and/or modify | |
* it under the terms of the GNU General Public License version 2 as | |
* published by the Free Software Foundation. | |
*/ | |
#include <linux/linkage.h> | |
ENTRY_CFI(strlen) | |
or r3,r0,7 | |
ld r2,[r3,-7] | |
ld.a r6,[r3,-3] | |
mov r4,0x01010101 | |
; uses long immediate | |
#ifdef __LITTLE_ENDIAN__ | |
asl_s r1,r0,3 | |
btst_s r0,2 | |
asl r7,r4,r1 | |
ror r5,r4 | |
sub r1,r2,r7 | |
bic_s r1,r1,r2 | |
mov.eq r7,r4 | |
sub r12,r6,r7 | |
bic r12,r12,r6 | |
or.eq r12,r12,r1 | |
and r12,r12,r5 | |
brne r12,0,.Learly_end | |
#else /* BIG ENDIAN */ | |
ror r5,r4 | |
btst_s r0,2 | |
mov_s r1,31 | |
sub3 r7,r1,r0 | |
sub r1,r2,r4 | |
bic_s r1,r1,r2 | |
bmsk r1,r1,r7 | |
sub r12,r6,r4 | |
bic r12,r12,r6 | |
bmsk.ne r12,r12,r7 | |
or.eq r12,r12,r1 | |
and r12,r12,r5 | |
brne r12,0,.Learly_end | |
#endif /* ENDIAN */ | |
.Loop: | |
ld_s r2,[r3,4] | |
ld.a r6,[r3,8] | |
; stall for load result | |
sub r1,r2,r4 | |
bic_s r1,r1,r2 | |
sub r12,r6,r4 | |
bic r12,r12,r6 | |
or r12,r12,r1 | |
and r12,r12,r5 | |
breq r12,0,.Loop | |
.Lend: | |
and.f r1,r1,r5 | |
sub.ne r3,r3,4 | |
mov.eq r1,r12 | |
#ifdef __LITTLE_ENDIAN__ | |
sub_s r2,r1,1 | |
bic_s r2,r2,r1 | |
norm r1,r2 | |
sub_s r0,r0,3 | |
lsr_s r1,r1,3 | |
sub r0,r3,r0 | |
j_s.d [blink] | |
sub r0,r0,r1 | |
#else /* BIG ENDIAN */ | |
lsr_s r1,r1,7 | |
mov.eq r2,r6 | |
bic_s r1,r1,r2 | |
norm r1,r1 | |
sub r0,r3,r0 | |
lsr_s r1,r1,3 | |
j_s.d [blink] | |
add r0,r0,r1 | |
#endif /* ENDIAN */ | |
.Learly_end: | |
b.d .Lend | |
sub_s.ne r1,r1,r1 | |
END_CFI(strlen) |