| /* |
| * 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(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(strlen) |
