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- /*
- * 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)
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