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These are library functions used by ARC700 architecture. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Francois Bedard <fbedard@synopsys.com> Cc: Wolfgang Denk <wd@denx.de> Cc: Heiko Schocher <hs@denx.de>
81 lines
1.5 KiB
ArmAsm
81 lines
1.5 KiB
ArmAsm
/*
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* Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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.global strlen
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.align 4
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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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