mirror of
https://github.com/AsahiLinux/u-boot
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63 lines
1.1 KiB
ArmAsm
63 lines
1.1 KiB
ArmAsm
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/*
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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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#define SMALL 7 /* Must be at least 6 to deal with alignment/loop issues. */
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.global memset
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.align 4
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memset:
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mov_s %r4, %r0
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or %r12, %r0, %r2
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bmsk.f %r12, %r12, 1
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extb_s %r1, %r1
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asl %r3, %r1, 8
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beq.d .Laligned
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or_s %r1, %r1, %r3
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brls %r2, SMALL, .Ltiny
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add %r3, %r2, %r0
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stb %r1, [%r3, -1]
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bclr_s %r3, %r3, 0
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stw %r1, [%r3, -2]
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bmsk.f %r12, %r0, 1
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add_s %r2, %r2, %r12
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sub.ne %r2, %r2, 4
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stb.ab %r1, [%r4, 1]
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and %r4, %r4, -2
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stw.ab %r1, [%r4, 2]
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and %r4, %r4, -4
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.balign 4
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.Laligned:
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asl %r3, %r1, 16
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lsr.f %lp_count, %r2, 2
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or_s %r1, %r1, %r3
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lpne .Loop_end
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st.ab %r1, [%r4, 4]
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.Loop_end:
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j_s [%blink]
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.balign 4
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.Ltiny:
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mov.f %lp_count, %r2
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lpne .Ltiny_end
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stb.ab %r1, [%r4, 1]
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.Ltiny_end:
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j_s [%blink]
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/*
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* memzero: @r0 = mem, @r1 = size_t
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* memset: @r0 = mem, @r1 = char, @r2 = size_t
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*/
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.global memzero
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.align 4
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memzero:
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/* adjust bzero args to memset args */
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mov %r2, %r1
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mov %r1, 0
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/* tail call so need to tinker with blink */
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b memset
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