10Sstevel@tonic-gate/* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 56812Sraf * Common Development and Distribution License (the "License"). 66812Sraf * You may not use this file except in compliance with the License. 70Sstevel@tonic-gate * 80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 100Sstevel@tonic-gate * See the License for the specific language governing permissions 110Sstevel@tonic-gate * and limitations under the License. 120Sstevel@tonic-gate * 130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 180Sstevel@tonic-gate * 190Sstevel@tonic-gate * CDDL HEADER END 200Sstevel@tonic-gate */ 216812Sraf 220Sstevel@tonic-gate/* 236812Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 240Sstevel@tonic-gate * Use is subject to license terms. 250Sstevel@tonic-gate */ 260Sstevel@tonic-gate 27*7298SMark.J.Nelson@Sun.COM .file "gettimeofday.s" 280Sstevel@tonic-gate 296812Sraf#include "SYS.h" 300Sstevel@tonic-gate 310Sstevel@tonic-gate ANSI_PRAGMA_WEAK(gettimeofday,function) 320Sstevel@tonic-gate 330Sstevel@tonic-gate/* 340Sstevel@tonic-gate * implements int gettimeofday(struct timeval *tp, void *tzp) 350Sstevel@tonic-gate * 360Sstevel@tonic-gate * note that tzp is always ignored 370Sstevel@tonic-gate */ 380Sstevel@tonic-gate 396812Sraf ENTRY(gettimeofday) 400Sstevel@tonic-gate/* 410Sstevel@tonic-gate * use long long gethrestime() 420Sstevel@tonic-gate */ 430Sstevel@tonic-gate pushq %rdi /* pointer to timeval */ 440Sstevel@tonic-gate SYSFASTTRAP(GETHRESTIME) 450Sstevel@tonic-gate/* 460Sstevel@tonic-gate * gethrestime trap returns seconds in %eax, nsecs in %edx 470Sstevel@tonic-gate * need to convert nsecs to usecs & store into area pointed 480Sstevel@tonic-gate * to by struct timeval * argument. 490Sstevel@tonic-gate */ 500Sstevel@tonic-gate popq %rcx /* pointer to timeval */ 510Sstevel@tonic-gate jrcxz 1f /* bail if we get a null pointer */ 520Sstevel@tonic-gate movq %rax, (%rcx) /* store seconds into timeval ptr */ 530Sstevel@tonic-gate movl $274877907, %eax /* divide by 1000 as impl. by gcc */ 540Sstevel@tonic-gate imull %edx /* See Hacker's Delight pg 162 */ 550Sstevel@tonic-gate sarl $6, %edx /* simplified by 0 <= nsec <= 1e9 */ 560Sstevel@tonic-gate movq %rdx, 8(%rcx) /* store usecs into timeval ptr + 8. */ 570Sstevel@tonic-gate1: 580Sstevel@tonic-gate RETC /* return 0 */ 596812Sraf SET_SIZE(gettimeofday) 600Sstevel@tonic-gate 61