/* "@(#)div.s 4.1 (ULTRIX) 7/3/90" */ /************************************************************************ * * * Copyright (c) 1989 by * * Digital Equipment Corporation, Maynard, MA * * All rights reserved. * * * * This software is furnished under a license and may be used and * * copied only in accordance with the terms of such license and * * with the inclusion of the above copyright notice. This * * software or any other copies thereof may not be provided or * * otherwise made available to any other person. No title to and * * ownership of the software is hereby transferred. * * * * This software is derived from software received from the * * University of California, Berkeley, and from Bell * * Laboratories. Use, duplication, or disclosure is subject to * * restrictions under license agreements with University of * * California and with AT&T. * * * * The information in this software is subject to change without * * notice and should not be construed as a commitment by Digital * * Equipment Corporation. * * * * Digital assumes no responsibility for the use or reliability * * of its software on equipment which is not supplied by Digital. * * * ************************************************************************/ /************************************************************************ * Modification History * * Ken Lesniak, 02-Jun-1989 * 001 Created for ANSI compliance. * ************************************************************************/ #include "DEFS.h" /* * div_t div(int numer, int denom) * ldiv_t ldiv(long numer, long denom) * * This routine implements the ANSI div and ldiv functions, which are * identical on a VAX, since an int and long are the same size. The * numerator "numer" is divided by the denominator "denom" and the * quotient and remainder are returned in a div_t/ldiv_t structure. * * It is assumed that ordering of the fields in both the div_t * and ldiv_t structures are the quotient field first, followed by * the remainder field. * * There is no check for division by zero, since ANSI specifies it * as "undefined behavior". For a vax, division by zero will result * in a signal being delivered to the process. */ .lcomm result, 8 # a scratch div_t/ldiv_t for return value .text .globl _div .globl _ldiv _div: _ldiv: .word 0 #ifdef PROF .data; 1:; .long 0; .text; moval 1b,r0; jsb mcount #endif PROF movaq result, r0 # point to result structure movl 4(ap), r1 # get the numerator extv $31, $1, r1, r2 # sign extend to quadword ediv 8(ap), r1, (r0), 4(r0) # get the quotient and remainder ret # return with r0 pointing to structure
