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| /*
| * Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved.
| *
| * SPDX-License-Identifier: GPL-2.0+
| */
|
| .global strlen
| .align 4
| 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
|
|
