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- /*
- * Copyright (c) 1988 Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Computer Consoles Inc.
- *
- * 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. 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.
- */
-
- #if defined(LIBC_SCCS) && !defined(lint)
- .asciz "@(#)udiv.s 5.1 (Berkeley) 1/30/91"
- #endif /* LIBC_SCCS and not lint */
-
- /*
- * Unsigned divide.
- *
- * udiv(dividend, divisor)
- */
- #include "DEFS.h"
-
- ASENTRY(udiv, 0)
- bitl $0x80000000,8(fp) # if (divisor & 0x80000000){
- jeql 1f
- cmpl 8(fp),4(fp) # if (divisor > dividend )
- jlequ 2f
- clrl r0 # return(0);
- ret
- 2: # else
- movl $1,r0 # return(1);}
- ret
- 1:
- clrl r2 # return(dividend/divisor);
- movl 4(fp),r3
- ediv 8(fp),r2,r0,r1
- ret
-
- /*
- * audiv(dividendp, divisor) -- like udiv but uses address of dividend.
- * Implements /= avoiding side effects in the dividend expression.
- */
- ASENTRY(audiv, 0)
- bitl $0x80000000,8(fp) # if (divisor & 0x80000000){
- jeql 1f
- cmpl 8(fp),*4(fp) # if (divisor > dividend )
- jlequ 2f
- clrl r0 # return(0);
- jbr 3f
- 2: # else
- movl $1,r0 # return(1);}
- jbr 3f
- 1:
- clrl r2 # return(dividend/divisor);
- movl *4(fp),r3
- ediv 8(fp),r2,r0,r1
- 3:
- movl r0,*4(fp)
- ret
-