2N/A/*
2N/A * CDDL HEADER START
2N/A *
2N/A * The contents of this file are subject to the terms of the
2N/A * Common Development and Distribution License (the "License").
2N/A * You may not use this file except in compliance with the License.
2N/A *
2N/A * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
2N/A * or http://www.opensolaris.org/os/licensing.
2N/A * See the License for the specific language governing permissions
2N/A * and limitations under the License.
2N/A *
2N/A * When distributing Covered Code, include this CDDL HEADER in each
2N/A * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
2N/A * If applicable, add the following below this CDDL HEADER, with the
2N/A * fields enclosed by brackets "[]" replaced with your own identifying
2N/A * information: Portions Copyright [yyyy] [name of copyright owner]
2N/A *
2N/A * CDDL HEADER END
2N/A */
2N/A
2N/A/*
2N/A * Copyright (c) 1992, 2011, Oracle and/or its affiliates. All rights reserved.
2N/A */
2N/A
2N/A .file "gettimeofday.s"
2N/A
2N/A#include "SYS.h"
2N/A
2N/A ANSI_PRAGMA_WEAK(gettimeofday,function)
2N/A
2N/A/
2N/A/ implements int gettimeofday(struct timeval *tp, void *tzp)
2N/A/
2N/A/ note that tzp is always ignored
2N/A/
2N/A/ gettimeofday is implemented as an alternate capability symbol
2N/A/ on x86 systems which support the rdtscp instruction.
2N/A/
2N/A ENTRY(gettimeofday)
2N/A/
2N/A/ use long long gethrestime()
2N/A/
2N/A SYSFASTTRAP(GETHRESTIME)
2N/A/
2N/A/ gethrestime trap returns seconds in %eax, nsecs in %edx
2N/A/ need to convert nsecs to usecs & store into area pointed
2N/A/ to by struct timeval * argument.
2N/A/
2N/A movl 4(%esp), %ecx / put ptr to timeval in %ecx
2N/A jecxz 1f / bail if we get a null pointer
2N/A movl %eax, (%ecx) / store seconds into timeval ptr
2N/A movl $274877907, %eax / divide by 1000 as impl. by gcc
2N/A imull %edx / See Hacker's Delight pg 162
2N/A sarl $6, %edx / simplified by 0 <= nsec <= 1e9
2N/A movl %edx, 4(%ecx) / store usecs into timeval ptr + 4.
2N/A1:
2N/A RETC / return 0
2N/A SET_SIZE(gettimeofday)