linux/arch/arc/lib/memset.S
Thomas Gleixner d2912cb15b treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
Based on 2 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Enrico Weigelt <info@metux.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19 17:09:55 +02:00

57 lines
1.1 KiB
ArmAsm

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*/
#include <linux/linkage.h>
#define SMALL 7 /* Must be at least 6 to deal with alignment/loop issues. */
ENTRY_CFI(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
.Laligned: ; This code address should be aligned for speed.
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]
END_CFI(memset)
; memzero: @r0 = mem, @r1 = size_t
; memset: @r0 = mem, @r1 = char, @r2 = size_t
ENTRY_CFI(memzero)
; adjust bzero args to memset args
mov r2, r1
mov r1, 0
b memset ;tail call so need to tinker with blink
END_CFI(memzero)