xref: /src/common/lib/libc/arch/sparc64/gen/umul.S

/*	$NetBSD: umul.S,v 1.1.94.2 2020/04/21 19:37:47 martin Exp $	*/

/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * from: Header: umul.s,v 1.4 92/06/25 13:24:05 torek Exp
 */

#include <machine/asm.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
	.asciz "@(#)umul.s	8.1 (Berkeley) 6/4/93"
#else
	RCSID("$NetBSD: umul.S,v 1.1.94.2 2020/04/21 19:37:47 martin Exp $")
#endif
#endif /* LIBC_SCCS and not lint */

/*
 * Unsigned multiply.  Returns %o0 * %o1 in %o0
 *
 * According to the manual the smaller parameter should be in
 * rs1, so we'll move it there.
 */

FUNC(.umul)
	cmp	%o0, %o1
	bge	1f
	 nop
	retl
	 mulx	%o0, %o1, %o0
1:
	retl
	 mulx	%o1, %o0, %o0