mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-31 06:18:51 +09:00
63 lines
1.1 KiB
ArmAsm
63 lines
1.1 KiB
ArmAsm
![]() |
/*
|
||
|
* Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved.
|
||
|
*
|
||
|
* SPDX-License-Identifier: GPL-2.0+
|
||
|
*/
|
||
|
|
||
|
#define SMALL 7 /* Must be at least 6 to deal with alignment/loop issues. */
|
||
|
|
||
|
.global memset
|
||
|
.align 4
|
||
|
memset:
|
||
|
mov_s %r4, %r0
|
||
|
or %r12, %r0, %r2
|
||
|
bmsk.f %r12, %r12, 1
|
||
|
extb_s %r1, %r1
|
||
|
asl %r3, %r1, 8
|
||
|
beq.d .Laligned
|
||
|
or_s %r1, %r1, %r3
|
||
|
brls %r2, SMALL, .Ltiny
|
||
|
add %r3, %r2, %r0
|
||
|
stb %r1, [%r3, -1]
|
||
|
bclr_s %r3, %r3, 0
|
||
|
stw %r1, [%r3, -2]
|
||
|
bmsk.f %r12, %r0, 1
|
||
|
add_s %r2, %r2, %r12
|
||
|
sub.ne %r2, %r2, 4
|
||
|
stb.ab %r1, [%r4, 1]
|
||
|
and %r4, %r4, -2
|
||
|
stw.ab %r1, [%r4, 2]
|
||
|
and %r4, %r4, -4
|
||
|
|
||
|
.balign 4
|
||
|
.Laligned:
|
||
|
asl %r3, %r1, 16
|
||
|
lsr.f %lp_count, %r2, 2
|
||
|
or_s %r1, %r1, %r3
|
||
|
lpne .Loop_end
|
||
|
st.ab %r1, [%r4, 4]
|
||
|
.Loop_end:
|
||
|
j_s [%blink]
|
||
|
|
||
|
.balign 4
|
||
|
.Ltiny:
|
||
|
mov.f %lp_count, %r2
|
||
|
lpne .Ltiny_end
|
||
|
stb.ab %r1, [%r4, 1]
|
||
|
.Ltiny_end:
|
||
|
j_s [%blink]
|
||
|
|
||
|
/*
|
||
|
* memzero: @r0 = mem, @r1 = size_t
|
||
|
* memset: @r0 = mem, @r1 = char, @r2 = size_t
|
||
|
*/
|
||
|
|
||
|
.global memzero
|
||
|
.align 4
|
||
|
memzero:
|
||
|
/* adjust bzero args to memset args */
|
||
|
mov %r2, %r1
|
||
|
mov %r1, 0
|
||
|
/* tail call so need to tinker with blink */
|
||
|
b memset
|