1*0Sstevel@tonic-gate/* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate/* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate .ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate .file "%M%" 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate#include <sys/asm_linkage.h> 32*0Sstevel@tonic-gate 33*0Sstevel@tonic-gate ANSI_PRAGMA_WEAK(memset,function) 34*0Sstevel@tonic-gate 35*0Sstevel@tonic-gate#include "SYS.h" 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate ANSI_PRAGMA_WEAK2(_private_memset,memset,function) 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate ENTRY(memset) 40*0Sstevel@tonic-gate pushl %edi / save register variable 41*0Sstevel@tonic-gate movl 8(%esp),%edi / %edi = string address 42*0Sstevel@tonic-gate movl 12(%esp),%eax / %al = byte to duplicate 43*0Sstevel@tonic-gate movl 16(%esp),%ecx / %ecx = number of copies 44*0Sstevel@tonic-gate cmpl $20,%ecx / strings with 20 or more chars should 45*0Sstevel@tonic-gate jbe .byteset / byteset one word at a time 46*0Sstevel@tonic-gate.wordset: 47*0Sstevel@tonic-gate andl $0xff,%eax / Duplicate fill const 4 times in %eax 48*0Sstevel@tonic-gate shrl $2,%ecx / %ecx = number of words to set 49*0Sstevel@tonic-gate movl %eax,%edx 50*0Sstevel@tonic-gate shll $8,%eax / This is ugly, but no P6 partial stalls 51*0Sstevel@tonic-gate orl %edx,%eax / get introduced as before 52*0Sstevel@tonic-gate shll $8,%eax 53*0Sstevel@tonic-gate orl %edx,%eax 54*0Sstevel@tonic-gate shll $8,%eax 55*0Sstevel@tonic-gate orl %edx,%eax 56*0Sstevel@tonic-gate rep; sstol 57*0Sstevel@tonic-gate movl 16(%esp),%ecx 58*0Sstevel@tonic-gate andl $3,%ecx / %ecx = number of bytes left 59*0Sstevel@tonic-gate.byteset: 60*0Sstevel@tonic-gate rep; sstob 61*0Sstevel@tonic-gate movl 8(%esp),%eax / return string address 62*0Sstevel@tonic-gate popl %edi / restore register variable 63*0Sstevel@tonic-gate ret 64*0Sstevel@tonic-gate SET_SIZE(memset) 65