84d9c625bf
- Fix for possible unset uid/gid in toproto
- Fix for default mtree style
- Update libelf
- Importing libexecinfo
- Resynchronize GCC, mpc, gmp, mpfr
- build.sh: Replace params with show-params.
This has been done as the make target has been renamed in the same
way, while a new target named params has been added. This new
target generates a file containing all the parameters, instead of
printing it on the console.
- Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
get getservbyport() out of the inner loop
Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
86 lines
3.5 KiB
ArmAsm
86 lines
3.5 KiB
ArmAsm
/*-
|
|
* Copyright (c) 2013 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Matt Thomas of 3am Software Foundry.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
|
|
RCSID("$NetBSD: memset_naive.S,v 1.1 2013/01/08 20:15:00 matt Exp $")
|
|
|
|
/*
|
|
* This isn't quite as simple/short as it could be but the truly trivial
|
|
* memset was an order of magnitude slower than this.
|
|
*/
|
|
|
|
ENTRY(memset)
|
|
/* LINTSTUB: void *memset(void *, int, size_t) */
|
|
mov ip, r0 /* need to preserve r0 */
|
|
cmp r2, #10 /* 10 bytes or less? */
|
|
ble .Lbyte_by_byte /* yes, bytewise is faster */
|
|
ands r3, r1, #0xff /* we are dealing with bytes */
|
|
orrne r3, r3, r3, lsl #8 /* move value into 2nd byte lane */
|
|
orrne r3, r3, r3, lsl #16 /* move value into all byte lanes */
|
|
mov r1, r2 /* move count */
|
|
ands r2, ip, #7 /* are we dword aligned? */
|
|
beq 1f /* yes we are */
|
|
rsb r2, r2, #8 /* how many bytes until aligned? */
|
|
sub r1, r1, r2 /* subtract from count */
|
|
tst ip, #1 /* halfword aligned? */
|
|
strneb r3, [ip], #1 /* nope, write a byte */
|
|
tst ip, #2 /* word aligned? */
|
|
strneh r3, [ip], #2 /* nope, write a halfword */
|
|
tst ip, #4 /* dword aligned? */
|
|
strne r3, [ip], #4 /* nope, write a word */
|
|
/*
|
|
* At this point, we are dword aligned.
|
|
*/
|
|
1: mov r2, r3 /* duplicate fill value */
|
|
2: subs r1, r1, #16 /* can we write 16 bytes? */
|
|
stmgeia ip!, {r2,r3} /* yes, write the first 8 of them */
|
|
stmgeia ip!, {r2,r3} /* yes, write the second 8 of them */
|
|
bgt 2b /* more left to fill */
|
|
RETc(eq) /* no, return */
|
|
/*
|
|
* Our count went negative but the bits below 16 haven't changed.
|
|
* So we are effectively testing modulo 16.
|
|
*/
|
|
tst r1, #8 /* can we write at least 8 bytes? */
|
|
stmneia ip!, {r2,r3} /* so do it */
|
|
tst r1, #4 /* can we write at least 4 bytes? */
|
|
strne r3, [ip], #4 /* so do it */
|
|
tst r1, #2 /* can we write at least 2 bytes? */
|
|
strneh r3, [ip], #2 /* so do it */
|
|
tst r1, #1 /* can we write 1 bytes? */
|
|
strneb r3, [ip], #1 /* so do it */
|
|
RET /* return */
|
|
|
|
.Lbyte_by_byte:
|
|
subs r2, r2, #1 /* can we write a byte? */
|
|
RETc(lt) /* no, return */
|
|
strb r3, [ip], #1 /* write a byte */
|
|
b .Lbyte_by_byte /* do next byte */
|
|
END(memset)
|