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Annotation of 40BSD/cmd/px/25set.s, revision 1.1

1.1     ! root        1: #
        !             2: # Copyright (c) 1979 Regents of the University of California
        !             3: #
        !             4: # char sccsid[] = "@(#)25set.s 4.1 10/10/80";
        !             5: #
        !             6: # SET OPERATIONS
        !             7: #
        !             8: _ADDT:
        !             9:        cvtbl   (r10)+,r0
        !            10:        bneq    l2501
        !            11:        movzwl  (r10)+,r0
        !            12: l2501:
        !            13:        addl3   sp,r0,r1        #r1 has pointer to second set
        !            14:        ashl    $-2,r0,r4       #r4 has number of longs in set
        !            15: l2503:
        !            16:        bisl2   (sp)+,(r1)+
        !            17:        sobgtr  r4,l2503
        !            18:        jmp     (r8)
        !            19: _SUBT:
        !            20:        cvtbl   (r10)+,r0
        !            21:        bneq    l2504
        !            22:        movzwl  (r10)+,r0
        !            23: l2504:
        !            24:        addl3   sp,r0,r1        #r1 has pointer to second set
        !            25:        ashl    $-2,r0,r4       #r4 has number of longs in set
        !            26: l2506:
        !            27:        bicl2   (sp)+,(r1)+
        !            28:        sobgtr  r4,l2506
        !            29:        jmp     (r8)
        !            30: _MULT:
        !            31:        cvtbl   (r10)+,r0
        !            32:        bneq    l2507
        !            33:        movzwl  (r10)+,r0
        !            34: l2507:
        !            35:        addl3   sp,r0,r1        #r1 has pointer to second set
        !            36:        ashl    $-2,r0,r4       #r4 has number of longs in set
        !            37: l2509:
        !            38:        mcoml   (sp)+,r3
        !            39:        bicl2   r3,(r1)+
        !            40:        sobgtr  r4,l2509
        !            41:        jmp     (r8)
        !            42: _CARD:
        !            43:        cvtbl   (r10)+,r0       #r0 has number of bytes in set
        !            44:        bneq    l2510
        !            45:        movzwl  (r10)+,r0
        !            46: l2510:
        !            47:        blbc    r0,l2511
        !            48:        incl    r0
        !            49: l2511:
        !            50:        cmpl    r0,$2           #check for long align
        !            51:        bneq    l2525
        !            52:        addl2   $2,r0           #if so append it
        !            53: l2525:
        !            54:        addl3   r0,sp,r4        #r4 has new stack addr
        !            55:        ashl    $3,r0,r0        #r0 has number of bits in set
        !            56:        mnegl   $1,r1           #will init r1 to zero
        !            57:        mnegl   $1,r5           #will init r2 to zero
        !            58: l2512:
        !            59:        incl    r1              #count found element
        !            60:        incl    r5              #advance to next field position
        !            61: l2521:
        !            62:        ffs     r5,$32,(sp),r5  #find next set bit
        !            63:        beql    l2521           #nothing found, so continue
        !            64:        cmpl    r5,r0           #check for end of field
        !            65:        blss    l2512           #element found, so count and continue
        !            66:        movl    r4,sp           #clear stack
        !            67:        movw    r1,-(sp)        #put answer on stack
        !            68:        jmp     (r8)
        !            69: _CTTOT:
        !            70:        cvtbl   (r10)+,r0
        !            71:        bneq    l2513
        !            72:        movzwl  (r10)+,r0
        !            73: l2513:
        !            74:        pushal  -4(sp)[r0]
        !            75:        calls   r0,_cttot
        !            76:        jmp     (r8)
        !            77: _IN:
        !            78:        cvtbl   (r10)+,r0
        !            79:        bneq    l2514
        !            80:        movzwl  (r10)+,r0       #r0 has size of set
        !            81: l2514:
        !            82:        movl    (sp)+,r1        #r1 has set index
        !            83:        addl3   r0,sp,r4        #r4 points to new top of stack
        !            84:        subw2   (r10)+,r1       #check below lower
        !            85:        blssu   l2516
        !            86:        cmpw    r1,(r10)+       #check above upper
        !            87:        bgtru   l2517
        !            88:        bbc     r1,(sp),l2517   #check for bit set
        !            89:        movl    r4,sp           #bit found
        !            90:        movw    $1,-(sp)
        !            91:        jmp     (r8)
        !            92: l2516:
        !            93:        addl2   $2,r10
        !            94: l2517:
        !            95:        movl    r4,sp           #bit not found
        !            96:        clrw    -(sp)
        !            97:        jmp     (r8)
        !            98: _INCT:
        !            99:        cvtbl   (r10)+,r0
        !           100:        bneq    l2518
        !           101:        movzwl  (r10)+,r0       #r0 has number of elements
        !           102: l2518:
        !           103:        calls   r0,_inct
        !           104:        movw    r0,-(sp)
        !           105:        jmp     (r8)

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