1/* 2 * Copyright (c) 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * This code is derived from software contributed to Berkeley by 18 * Computer Consoles Inc. 19 */ 20 21#if defined(LIBC_SCCS) && !defined(lint) 22 .asciz "@(#)udiv.s 1.4 (Berkeley) 06/27/88" 23#endif /* LIBC_SCCS and not lint */ 24 25/* 26 * Unsigned divide. 27 * 28 * udiv(dividend, divisor) 29 */ 30#include "DEFS.h" 31 32ASENTRY(udiv, 0) 33 bitl $0x80000000,8(fp) # if (divisor & 0x80000000){ 34 jeql 1f 35 cmpl 8(fp),4(fp) # if (divisor > dividend ) 36 jlequ 2f 37 clrl r0 # return(0); 38 ret 392: # else 40 movl $1,r0 # return(1);} 41 ret 421: 43 clrl r2 # return(dividend/divisor); 44 movl 4(fp),r3 45 ediv 8(fp),r2,r0,r1 46 ret 47 48/* 49 * audiv(dividendp, divisor) -- like udiv but uses address of dividend. 50 * Implements /= avoiding side effects in the dividend expression. 51 */ 52ASENTRY(audiv, 0) 53 bitl $0x80000000,8(fp) # if (divisor & 0x80000000){ 54 jeql 1f 55 cmpl 8(fp),*4(fp) # if (divisor > dividend ) 56 jlequ 2f 57 clrl r0 # return(0); 58 jbr 3f 592: # else 60 movl $1,r0 # return(1);} 61 jbr 3f 621: 63 clrl r2 # return(dividend/divisor); 64 movl *4(fp),r3 65 ediv 8(fp),r2,r0,r1 663: 67 movl r0,*4(fp) 68 ret 69