Return to udiv.s CVS log

Up to [CSRG BSD Unix] / 43BSDReno / lib / libc / tahoe / gen

Annotation of 43BSDReno/lib/libc/tahoe/gen/udiv.s, revision 1.1

1.1     ! root        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: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  *
        !            19:  * This code is derived from software contributed to Berkeley by
        !            20:  * Computer Consoles Inc.
        !            21:  */
        !            22: 
        !            23: #if defined(LIBC_SCCS) && !defined(lint)
        !            24:        .asciz "@(#)udiv.s      1.5 (Berkeley) 6/1/90"
        !            25: #endif /* LIBC_SCCS and not lint */
        !            26: 
        !            27: /*
        !            28:  * Unsigned divide.
        !            29:  *
        !            30:  * udiv(dividend, divisor)
        !            31:  */
        !            32: #include "DEFS.h"
        !            33: 
        !            34: ASENTRY(udiv, 0)
        !            35:        bitl    $0x80000000,8(fp)       #  if (divisor & 0x80000000){
        !            36:        jeql    1f                        
        !            37:        cmpl    8(fp),4(fp)             #  if (divisor > dividend )
        !            38:        jlequ   2f
        !            39:        clrl    r0                      #      return(0);
        !            40:        ret
        !            41: 2:                                     #  else
        !            42:        movl    $1,r0                   #      return(1);}
        !            43:        ret
        !            44: 1:
        !            45:        clrl    r2                      #  return(dividend/divisor);
        !            46:        movl    4(fp),r3
        !            47:        ediv    8(fp),r2,r0,r1
        !            48:        ret
        !            49: 
        !            50: /*
        !            51:  * audiv(dividendp, divisor) -- like udiv but uses address of dividend.
        !            52:  *     Implements /= avoiding side effects in the dividend expression.
        !            53:  */
        !            54: ASENTRY(audiv, 0)
        !            55:        bitl    $0x80000000,8(fp)       #  if (divisor & 0x80000000){
        !            56:        jeql    1f                        
        !            57:        cmpl    8(fp),*4(fp)            #  if (divisor > dividend )
        !            58:        jlequ   2f
        !            59:        clrl    r0                      #      return(0);
        !            60:        jbr     3f
        !            61: 2:                                     #  else
        !            62:        movl    $1,r0                   #      return(1);}
        !            63:        jbr     3f
        !            64: 1:
        !            65:        clrl    r2                      #  return(dividend/divisor);
        !            66:        movl    *4(fp),r3
        !            67:        ediv    8(fp),r2,r0,r1
        !            68: 3:
        !            69:        movl    r0,*4(fp)
        !            70:        ret

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.