11414Scindi/*- 21414Scindi * Copyright (c) 1992, 1993 31414Scindi * The Regents of the University of California. All rights reserved. 41414Scindi * 51414Scindi * This software was developed by the Computer Systems Engineering group 61414Scindi * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 71414Scindi * contributed to Berkeley. 81414Scindi * 91414Scindi * Redistribution and use in source and binary forms, with or without 101414Scindi * modification, are permitted provided that the following conditions 111414Scindi * are met: 121414Scindi * 1. Redistributions of source code must retain the above copyright 131414Scindi * notice, this list of conditions and the following disclaimer. 141414Scindi * 2. Redistributions in binary form must reproduce the above copyright 151414Scindi * notice, this list of conditions and the following disclaimer in the 161414Scindi * documentation and/or other materials provided with the distribution. 171414Scindi * 4. Neither the name of the University nor the names of its contributors 181414Scindi * may be used to endorse or promote products derived from this software 191414Scindi * without specific prior written permission. 201414Scindi * 211414Scindi * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221414Scindi * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 234328Scindi * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241414Scindi * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251414Scindi * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261414Scindi * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271414Scindi * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281414Scindi * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291414Scindi * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301414Scindi * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311414Scindi * SUCH DAMAGE. 321414Scindi */ 331414Scindi 341414Scindi#if defined(LIBC_SCCS) && !defined(lint) 353062Scindistatic char sccsid[] = "@(#)lshrdi3.c 8.1 (Berkeley) 6/4/93"; 363062Scindi#endif /* LIBC_SCCS and not lint */ 373062Scindi#include <sys/cdefs.h> 383062Scindi__FBSDID("$FreeBSD$"); 393062Scindi 401414Scindi#include "quad.h" 411414Scindi 423062Scindi/* 431414Scindi * Shift an (unsigned) quad value right (logical shift right). 441414Scindi */ 451414Scindiquad_t 461414Scindi__lshrdi3(a, shift) 471414Scindi quad_t a; 481414Scindi qshift_t shift; 492027Ssethg{ 501414Scindi union uu aa; 511414Scindi 522027Ssethg aa.q = a; 531414Scindi if (shift >= LONG_BITS) { 541414Scindi aa.ul[L] = shift >= QUAD_BITS ? 0 : 552027Ssethg aa.ul[H] >> (shift - LONG_BITS); 561414Scindi aa.ul[H] = 0; 572027Ssethg } else if (shift > 0) { 581414Scindi aa.ul[L] = (aa.ul[L] >> shift) | 591414Scindi (aa.ul[H] << (LONG_BITS - shift)); 601414Scindi aa.ul[H] >>= shift; 612027Ssethg } 622027Ssethg return (aa.q); 631414Scindi} 641414Scindi