17c478bd9Sstevel@tonic-gate/* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 57257d1b4Sraf * Common Development and Distribution License (the "License"). 67257d1b4Sraf * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 217257d1b4Sraf 227c478bd9Sstevel@tonic-gate/* 237257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 247c478bd9Sstevel@tonic-gate * Use is subject to license terms. 257c478bd9Sstevel@tonic-gate */ 267c478bd9Sstevel@tonic-gate 27*9a70fc3bSMark J. Nelson .file "gettimeofday.s" 287c478bd9Sstevel@tonic-gate 297257d1b4Sraf#include "SYS.h" 307c478bd9Sstevel@tonic-gate 317c478bd9Sstevel@tonic-gate ANSI_PRAGMA_WEAK(gettimeofday,function) 327c478bd9Sstevel@tonic-gate 337c478bd9Sstevel@tonic-gate/* 347c478bd9Sstevel@tonic-gate * implements int gettimeofday(struct timeval *tp, void *tzp) 357c478bd9Sstevel@tonic-gate * 367c478bd9Sstevel@tonic-gate * note that tzp is always ignored 377c478bd9Sstevel@tonic-gate */ 387c478bd9Sstevel@tonic-gate 397257d1b4Sraf ENTRY(gettimeofday) 407c478bd9Sstevel@tonic-gate/* 417c478bd9Sstevel@tonic-gate * use long long gethrestime() 427c478bd9Sstevel@tonic-gate */ 437c478bd9Sstevel@tonic-gate pushq %rdi /* pointer to timeval */ 447c478bd9Sstevel@tonic-gate SYSFASTTRAP(GETHRESTIME) 457c478bd9Sstevel@tonic-gate/* 467c478bd9Sstevel@tonic-gate * gethrestime trap returns seconds in %eax, nsecs in %edx 477c478bd9Sstevel@tonic-gate * need to convert nsecs to usecs & store into area pointed 487c478bd9Sstevel@tonic-gate * to by struct timeval * argument. 497c478bd9Sstevel@tonic-gate */ 507c478bd9Sstevel@tonic-gate popq %rcx /* pointer to timeval */ 517c478bd9Sstevel@tonic-gate jrcxz 1f /* bail if we get a null pointer */ 527c478bd9Sstevel@tonic-gate movq %rax, (%rcx) /* store seconds into timeval ptr */ 537c478bd9Sstevel@tonic-gate movl $274877907, %eax /* divide by 1000 as impl. by gcc */ 547c478bd9Sstevel@tonic-gate imull %edx /* See Hacker's Delight pg 162 */ 557c478bd9Sstevel@tonic-gate sarl $6, %edx /* simplified by 0 <= nsec <= 1e9 */ 567c478bd9Sstevel@tonic-gate movq %rdx, 8(%rcx) /* store usecs into timeval ptr + 8. */ 577c478bd9Sstevel@tonic-gate1: 587c478bd9Sstevel@tonic-gate RETC /* return 0 */ 597257d1b4Sraf SET_SIZE(gettimeofday) 607c478bd9Sstevel@tonic-gate 61