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/* Set a block of memory to some byte value. For SUN4V Niagara.
Copyright (C) 2006, 2008 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David S. Miller (davem@davemloft.net)
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#define ASI_BLK_INIT_QUAD_LDD_P 0xe2
#define ASI_P 0x80
#define ASI_PNF 0x82
#ifndef XCC
#define USE_BPR
#define XCC xcc
#endif
.register %g2,#scratch
.text
.align 32
ENTRY(memset)
/* %o0=buf, %o1=pat, %o2=len */
and %o1, 0xff, %o3
mov %o2, %o1
sllx %o3, 8, %g1
or %g1, %o3, %o2
sllx %o2, 16, %g1
or %g1, %o2, %o2
sllx %o2, 32, %g1
ba,pt %XCC, 1f
or %g1, %o2, %o2
END(memset)
ENTRY(__bzero)
clr %o2
1:
#ifndef USE_BRP
srl %o1, 0, %o1
#endif
brz,pn %o1, 90f
mov %o0, %o3
wr %g0, ASI_P, %asi
cmp %o1, 15
bl,pn %icc, 70f
andcc %o0, 0x7, %g1
be,pt %XCC, 2f
mov 8, %g2
sub %g2, %g1, %g1
sub %o1, %g1, %o1
1: stba %o2, [%o0 + 0x00] %asi
subcc %g1, 1, %g1
bne,pt %XCC, 1b
add %o0, 1, %o0
2: cmp %o1, 128
bl,pn %icc, 60f
andcc %o0, (64 - 1), %g1
be,pt %XCC, 40f
mov 64, %g2
sub %g2, %g1, %g1
sub %o1, %g1, %o1
1: stxa %o2, [%o0 + 0x00] %asi
subcc %g1, 8, %g1
bne,pt %XCC, 1b
add %o0, 8, %o0
40:
wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi
andn %o1, (64 - 1), %g1
sub %o1, %g1, %o1
50:
stxa %o2, [%o0 + 0x00] %asi
stxa %o2, [%o0 + 0x08] %asi
stxa %o2, [%o0 + 0x10] %asi
stxa %o2, [%o0 + 0x18] %asi
stxa %o2, [%o0 + 0x20] %asi
stxa %o2, [%o0 + 0x28] %asi
stxa %o2, [%o0 + 0x30] %asi
stxa %o2, [%o0 + 0x38] %asi
subcc %g1, 64, %g1
bne,pt %XCC, 50b
add %o0, 64, %o0
wr %g0, ASI_P, %asi
brz,pn %o1, 80f
60:
andncc %o1, 0x7, %g1
be,pn %XCC, 2f
sub %o1, %g1, %o1
1: stxa %o2, [%o0 + 0x00] %asi
subcc %g1, 8, %g1
bne,pt %XCC, 1b
add %o0, 8, %o0
2: brz,pt %o1, 80f
nop
70:
1: stba %o2, [%o0 + 0x00] %asi
subcc %o1, 1, %o1
bne,pt %icc, 1b
add %o0, 1, %o0
/* fallthrough */
80:
wr %g0, ASI_PNF, %asi
90:
retl
mov %o3, %o0
END(__bzero)
libc_hidden_builtin_def (memset)
weak_alias (__bzero, bzero)
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