mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 17:07:38 +00:00
ea0364f1bb
Also move lib_$ARCH/config.mk to arch/$ARCH/config.mk This change is intended to clean up the top-level directory structure and more closely mimic Linux's directory organization. Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
81 lines
1.7 KiB
ArmAsm
81 lines
1.7 KiB
ArmAsm
/*
|
|
* Copyright (C) 2004-2006 Atmel Corporation
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
/*
|
|
* r12: void *b
|
|
* r11: int c
|
|
* r10: size_t len
|
|
*
|
|
* Returns b in r12
|
|
*/
|
|
.section .text.memset, "ax", @progbits
|
|
|
|
.global memset
|
|
.type memset, @function
|
|
.align 2
|
|
memset:
|
|
mov r9, r12
|
|
mov r8, r12
|
|
or r11, r11, r11 << 8
|
|
andl r9, 3, COH
|
|
brne 1f
|
|
|
|
2: or r11, r11, r11 << 16
|
|
sub r10, 4
|
|
brlt 5f
|
|
|
|
/* Let's do some real work */
|
|
4: st.w r8++, r11
|
|
sub r10, 4
|
|
brge 4b
|
|
|
|
/*
|
|
* When we get here, we've got less than 4 bytes to set. r10
|
|
* might be negative.
|
|
*/
|
|
5: sub r10, -4
|
|
reteq r12
|
|
|
|
/* Fastpath ends here, exactly 32 bytes from memset */
|
|
|
|
/* Handle unaligned count or pointer */
|
|
bld r10, 1
|
|
brcc 6f
|
|
st.b r8++, r11
|
|
st.b r8++, r11
|
|
bld r10, 0
|
|
retcc r12
|
|
6: st.b r8++, r11
|
|
mov pc, lr
|
|
|
|
/* Handle unaligned pointer */
|
|
1: sub r10, 4
|
|
brlt 5b
|
|
add r10, r9
|
|
lsl r9, 1
|
|
add pc, r9
|
|
st.b r8++, r11
|
|
st.b r8++, r11
|
|
st.b r8++, r11
|
|
rjmp 2b
|
|
|
|
.size memset, . - memset
|