/* $OpenBSD: poly_mul64.s,v 1.1 1996/08/27 10:32:54 downsj Exp $ */ /* * poly_mul64.S * * Multiply two 64 bit integers. * * Call from C as: * void mul64(long long *a, long long *b, long long *result) * * * Copyright (C) 1992,1993,1994 * W. Metzenthen, 22 Parker St, Ormond, Vic 3163, * Australia. E-mail billm@vaxc.cc.monash.edu.au * All rights reserved. * * This copyright notice covers the redistribution and use of the * FPU emulator developed by W. Metzenthen. It covers only its use * in the 386BSD, FreeBSD and NetBSD operating systems. Any other * use is not permitted under this copyright. * * 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 include information specifying * that source code for the emulator is freely available and include * either: * a) an offer to provide the source code for a nominal distribution * fee, or * b) list at least two alternative methods whereby the source * can be obtained, e.g. a publically accessible bulletin board * and an anonymous ftp site from which the software can be * downloaded. * 3. All advertising materials specifically mentioning features or use of * this emulator must acknowledge that it was developed by W. Metzenthen. * 4. The name of W. Metzenthen may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED ``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 * W. METZENTHEN 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. * * * The purpose of this copyright, based upon the Berkeley copyright, is to * ensure that the covered software remains freely available to everyone. * * The software (with necessary differences) is also available, but under * the terms of the GNU copyleft, for the Linux operating system and for * the djgpp ms-dos extender. * * W. Metzenthen June 1994. * * * $FreeBSD: poly_mul64.s,v 1.3 1994/06/10 07:44:39 rich Exp $ * */ #include <machine/asm.h> #include <gnu/arch/i386/fpemul/fpu_asm.h> .text .align 2,144 .globl _mul64 _mul64: pushl %ebp movl %esp,%ebp subl $16,%esp pushl %esi pushl %ebx movl PARAM1,%esi movl PARAM2,%ecx movl PARAM3,%ebx xor %eax,%eax movl %eax,-4(%ebp) movl %eax,-8(%ebp) movl (%esi),%eax mull (%ecx) movl %eax,-16(%ebp) /* Not used */ movl %edx,-12(%ebp) movl (%esi),%eax mull 4(%ecx) addl %eax,-12(%ebp) adcl %edx,-8(%ebp) adcl $0,-4(%ebp) movl 4(%esi),%eax mull (%ecx) addl %eax,-12(%ebp) adcl %edx,-8(%ebp) adcl $0,-4(%ebp) movl 4(%esi),%eax mull 4(%ecx) addl %eax,-8(%ebp) adcl %edx,-4(%ebp) testb $128,-9(%ebp) je L_no_round addl $1,-8(%ebp) adcl $0,-4(%ebp) L_no_round: movl -8(%ebp),%esi movl %esi,(%ebx) movl -4(%ebp),%esi movl %esi,4(%ebx) popl %ebx popl %esi leave ret