[uClibc-cvs] uClibc/libc/string/frv Makefile, NONE, 1.1 memcpy.S, NONE, 1.1 memset.S, NONE, 1.1
Erik Andersen
andersen at uclibc.org
Fri May 14 10:29:47 UTC 2004
Update of /var/cvs/uClibc/libc/string/frv
In directory nail:/tmp/cvs-serv21725/libc/string/frv
Added Files:
Makefile memcpy.S memset.S
Log Message:
Alexandre Oliva writes:
This patch introduces optimized versions of memcpy and memset for
frv.
--- NEW FILE: memset.S ---
/* memset.S: optimised assembly memset
*
* Copyright (C) 2003, 2004 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells at redhat.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
.text
.p2align 4
###############################################################################
#
# void *memset(void *p, char ch, size_t count)
#
# - NOTE: must not use any stack. exception detection performs function return
# to caller's fixup routine, aborting the remainder of the set
# GR4, GR7, GR8, and GR11 must be managed
#
###############################################################################
.globl memset
.type memset, at function
memset:
orcc.p gr10,gr0,gr5,icc3 ; GR5 = count
andi gr9,#0xff,gr9
or.p gr8,gr0,gr4 ; GR4 = address
beqlr icc3,#0
# conditionally write a byte to 2b-align the address
setlos.p #1,gr6
andicc gr4,#1,gr0,icc0
ckne icc0,cc7
cstb.p gr9,@(gr4,gr0) ,cc7,#1
csubcc gr5,gr6,gr5 ,cc7,#1 ; also set ICC3
cadd.p gr4,gr6,gr4 ,cc7,#1
beqlr icc3,#0
# conditionally write a word to 4b-align the address
andicc.p gr4,#2,gr0,icc0
subicc gr5,#2,gr0,icc1
setlos.p #2,gr6
ckne icc0,cc7
slli.p gr9,#8,gr12 ; need to double up the pattern
cknc icc1,cc5
or.p gr9,gr12,gr12
andcr cc7,cc5,cc7
csth.p gr12,@(gr4,gr0) ,cc7,#1
csubcc gr5,gr6,gr5 ,cc7,#1 ; also set ICC3
cadd.p gr4,gr6,gr4 ,cc7,#1
beqlr icc3,#0
# conditionally write a dword to 8b-align the address
andicc.p gr4,#4,gr0,icc0
subicc gr5,#4,gr0,icc1
setlos.p #4,gr6
ckne icc0,cc7
slli.p gr12,#16,gr13 ; need to quadruple-up the pattern
cknc icc1,cc5
or.p gr13,gr12,gr12
andcr cc7,cc5,cc7
cst.p gr12,@(gr4,gr0) ,cc7,#1
csubcc gr5,gr6,gr5 ,cc7,#1 ; also set ICC3
cadd.p gr4,gr6,gr4 ,cc7,#1
beqlr icc3,#0
or.p gr12,gr12,gr13 ; need to octuple-up the pattern
# the address is now 8b-aligned - loop around writing 64b chunks
setlos #8,gr7
subi.p gr4,#8,gr4 ; store with update index does weird stuff
setlos #64,gr6
subicc gr5,#64,gr0,icc0
0: cknc icc0,cc7
cstdu gr12,@(gr4,gr7) ,cc7,#1
cstdu gr12,@(gr4,gr7) ,cc7,#1
cstdu gr12,@(gr4,gr7) ,cc7,#1
cstdu gr12,@(gr4,gr7) ,cc7,#1
cstdu gr12,@(gr4,gr7) ,cc7,#1
cstdu.p gr12,@(gr4,gr7) ,cc7,#1
csubcc gr5,gr6,gr5 ,cc7,#1 ; also set ICC3
cstdu.p gr12,@(gr4,gr7) ,cc7,#1
subicc gr5,#64,gr0,icc0
cstdu.p gr12,@(gr4,gr7) ,cc7,#1
beqlr icc3,#0
bnc icc0,#2,0b
# now do 32-byte remnant
subicc.p gr5,#32,gr0,icc0
setlos #32,gr6
cknc icc0,cc7
cstdu.p gr12,@(gr4,gr7) ,cc7,#1
csubcc gr5,gr6,gr5 ,cc7,#1 ; also set ICC3
cstdu.p gr12,@(gr4,gr7) ,cc7,#1
setlos #16,gr6
cstdu.p gr12,@(gr4,gr7) ,cc7,#1
subicc gr5,#16,gr0,icc0
cstdu.p gr12,@(gr4,gr7) ,cc7,#1
beqlr icc3,#0
# now do 16-byte remnant
cknc icc0,cc7
cstdu.p gr12,@(gr4,gr7) ,cc7,#1
csubcc gr5,gr6,gr5 ,cc7,#1 ; also set ICC3
cstdu.p gr12,@(gr4,gr7) ,cc7,#1
beqlr icc3,#0
# now do 8-byte remnant
subicc gr5,#8,gr0,icc1
cknc icc1,cc7
cstdu.p gr12,@(gr4,gr7) ,cc7,#1
csubcc gr5,gr7,gr5 ,cc7,#1 ; also set ICC3
setlos.p #4,gr7
beqlr icc3,#0
# now do 4-byte remnant
subicc gr5,#4,gr0,icc0
addi.p gr4,#4,gr4
cknc icc0,cc7
cstu.p gr12,@(gr4,gr7) ,cc7,#1
csubcc gr5,gr7,gr5 ,cc7,#1 ; also set ICC3
subicc.p gr5,#2,gr0,icc1
beqlr icc3,#0
# now do 2-byte remnant
setlos #2,gr7
addi.p gr4,#2,gr4
cknc icc1,cc7
csthu.p gr12,@(gr4,gr7) ,cc7,#1
csubcc gr5,gr7,gr5 ,cc7,#1 ; also set ICC3
subicc.p gr5,#1,gr0,icc0
beqlr icc3,#0
# now do 1-byte remnant
setlos #0,gr7
addi.p gr4,#2,gr4
cknc icc0,cc7
cstb.p gr12,@(gr4,gr0) ,cc7,#1
bralr
.size memset, .-memset
--- NEW FILE: Makefile ---
# Makefile for uClibc
#
# Copyright (C) 2004 Alexandre Oliva <aoliva at redhat.com>
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU Library 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 Library General Public License for more
# details.
#
# You should have received a copy of the GNU Library 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
TOPDIR=../../../
include $(TOPDIR)Rules.mak
SSRC=memcpy.S memset.S
SOBJS=$(patsubst %.S,%.o, $(SSRC))
OBJS=$(SOBJS)
all: $(OBJS) $(LIBC)
$(LIBC): ar-target
ar-target: $(OBJS)
$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
$(SOBJS): %.o : %.S
$(CC) $(CFLAGS) -c $< -o $@
$(STRIPTOOL) -x -R .note -R .comment $*.o
clean:
$(RM) *.[oa] *~ core
--- NEW FILE: memcpy.S ---
/* memcpy.S: optimised assembly memcpy
*
* Copyright (C) 2003, 2004 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells at redhat.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
.text
.p2align 4
###############################################################################
#
# void *memcpy(void *to, const char *from, size_t count)
#
# - NOTE: must not use any stack. exception detection performs function return
# to caller's fixup routine, aborting the remainder of the copy
#
###############################################################################
.globl memcpy
.type memcpy, at function
memcpy:
or.p gr8,gr9,gr4
orcc gr10,gr0,gr0,icc3
or.p gr10,gr4,gr4
beqlr icc3,#0
# optimise based on best common alignment for to, from & count
andicc.p gr4,#0x1f,gr0,icc0
setlos #8,gr11
andicc.p gr4,#0x0f,gr0,icc1
beq icc0,#0,memcpy_32
andicc.p gr4,#0x07,gr0,icc0
beq icc1,#0,memcpy_16
andicc.p gr4,#0x03,gr0,icc1
beq icc0,#0,memcpy_8
andicc.p gr4,#0x01,gr0,icc0
beq icc1,#0,memcpy_4
setlos.p #1,gr11
beq icc0,#0,memcpy_2
# do byte by byte copy
sub.p gr8,gr11,gr3
sub gr9,gr11,gr9
0: ldubu.p @(gr9,gr11),gr4
subicc gr10,#1,gr10,icc0
stbu.p gr4,@(gr3,gr11)
bne icc0,#2,0b
bralr
# do halfword by halfword copy
memcpy_2:
setlos #2,gr11
sub.p gr8,gr11,gr3
sub gr9,gr11,gr9
0: lduhu.p @(gr9,gr11),gr4
subicc gr10,#2,gr10,icc0
sthu.p gr4,@(gr3,gr11)
bne icc0,#2,0b
bralr
# do word by word copy
memcpy_4:
setlos #4,gr11
sub.p gr8,gr11,gr3
sub gr9,gr11,gr9
0: ldu.p @(gr9,gr11),gr4
subicc gr10,#4,gr10,icc0
stu.p gr4,@(gr3,gr11)
bne icc0,#2,0b
bralr
# do double-word by double-word copy
memcpy_8:
sub.p gr8,gr11,gr3
sub gr9,gr11,gr9
0: lddu.p @(gr9,gr11),gr4
subicc gr10,#8,gr10,icc0
stdu.p gr4,@(gr3,gr11)
bne icc0,#2,0b
bralr
# do quad-word by quad-word copy
memcpy_16:
sub.p gr8,gr11,gr3
sub gr9,gr11,gr9
0: lddu @(gr9,gr11),gr4
lddu.p @(gr9,gr11),gr6
subicc gr10,#16,gr10,icc0
stdu gr4,@(gr3,gr11)
stdu.p gr6,@(gr3,gr11)
bne icc0,#2,0b
bralr
# do eight-word by eight-word copy
memcpy_32:
sub.p gr8,gr11,gr3
sub gr9,gr11,gr9
0: lddu @(gr9,gr11),gr4
lddu @(gr9,gr11),gr6
lddu @(gr9,gr11),gr12
lddu.p @(gr9,gr11),gr14
subicc gr10,#32,gr10,icc0
stdu gr4,@(gr3,gr11)
stdu gr6,@(gr3,gr11)
stdu gr12,@(gr3,gr11)
stdu.p gr14,@(gr3,gr11)
bne icc0,#2,0b
bralr
.size memcpy, .-memcpy
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