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 "@(#)urem.s 1.3 (Berkeley) 06/27/88" 23#endif /* LIBC_SCCS and not lint */ 24 25/* 26 * Unsigned remainder. 27 * 28 * urem(dividend, divisor) 29 */ 30#include "DEFS.h" 31 32ASENTRY(urem, 0) 33 bitl $0x80000000,8(fp) # if (divisor & 0x80000000){ 34 jeql 1f 35 movl 4(fp),r0 36 cmpl 8(fp),r0 # if (divisor <= dividend ) 37 jgtru 2f 38 subl2 8(fp),r0 # return(dividend-divisor); 392: # else return(dividend);} 40 ret 411: 42 clrl r2 # return(dividend%divisor); 43 movl 4(fp),r3 44 ediv 8(fp),r2,r1,r0 45 ret 46 47/* 48 * aurem(dividendp, divisor) -- like urem but uses address of dividend. 49 * Implements %= avoiding side effects in the dividend expression. 50 */ 51ASENTRY(aurem, 0) 52 bitl $0x80000000,8(fp) # if (divisor & 0x80000000){ 53 jeql 1f 54 movl *4(fp),r0 55 cmpl 8(fp),r0 # if (divisor <= dividend ) 56 jgtru 2f 57 subl2 8(fp),r0 # return(dividend-divisor); 58 # else return(dividend);} 59 jbr 2f 601: 61 clrl r2 # return(dividend%divisor); 62 movl *4(fp),r3 63 ediv 8(fp),r2,r1,r0 642: 65 movl r0,*4(fp) 66 ret 67