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80 lines
1.3 KiB
80 lines
1.3 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) |
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*/ |
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#include <linux/linkage.h> |
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ENTRY_CFI(strlen) |
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or r3,r0,7 |
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ld r2,[r3,-7] |
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ld.a r6,[r3,-3] |
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mov r4,0x01010101 |
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; uses long immediate |
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#ifdef __LITTLE_ENDIAN__ |
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asl_s r1,r0,3 |
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btst_s r0,2 |
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asl r7,r4,r1 |
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ror r5,r4 |
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sub r1,r2,r7 |
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bic_s r1,r1,r2 |
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mov.eq r7,r4 |
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sub r12,r6,r7 |
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bic r12,r12,r6 |
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or.eq r12,r12,r1 |
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and r12,r12,r5 |
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brne r12,0,.Learly_end |
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#else /* BIG ENDIAN */ |
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ror r5,r4 |
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btst_s r0,2 |
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mov_s r1,31 |
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sub3 r7,r1,r0 |
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sub r1,r2,r4 |
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bic_s r1,r1,r2 |
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bmsk r1,r1,r7 |
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sub r12,r6,r4 |
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bic r12,r12,r6 |
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bmsk.ne r12,r12,r7 |
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or.eq r12,r12,r1 |
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and r12,r12,r5 |
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brne r12,0,.Learly_end |
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#endif /* ENDIAN */ |
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.Loop: |
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ld_s r2,[r3,4] |
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ld.a r6,[r3,8] |
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; stall for load result |
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sub r1,r2,r4 |
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bic_s r1,r1,r2 |
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sub r12,r6,r4 |
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bic r12,r12,r6 |
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or r12,r12,r1 |
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and r12,r12,r5 |
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breq r12,0,.Loop |
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.Lend: |
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and.f r1,r1,r5 |
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sub.ne r3,r3,4 |
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mov.eq r1,r12 |
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#ifdef __LITTLE_ENDIAN__ |
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sub_s r2,r1,1 |
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bic_s r2,r2,r1 |
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norm r1,r2 |
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sub_s r0,r0,3 |
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lsr_s r1,r1,3 |
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sub r0,r3,r0 |
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j_s.d [blink] |
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sub r0,r0,r1 |
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#else /* BIG ENDIAN */ |
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lsr_s r1,r1,7 |
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mov.eq r2,r6 |
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bic_s r1,r1,r2 |
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norm r1,r1 |
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sub r0,r3,r0 |
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lsr_s r1,r1,3 |
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j_s.d [blink] |
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add r0,r0,r1 |
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#endif /* ENDIAN */ |
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.Learly_end: |
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b.d .Lend |
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sub_s.ne r1,r1,r1 |
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END_CFI(strlen)
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