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Annotation of researchv10dc/dist/man/v4/man3/compar.3, revision 1.1

1.1     ! root        1: .th COMPAR III 1/15/73
        !             2: .sh NAME
        !             3: compar \*- default comparison routine for qsort
        !             4: .sh SYNOPSIS
        !             5: .ft B
        !             6: jsr    pc,compar
        !             7: .ft R
        !             8: .sh DESCRIPTION
        !             9: .it Compar
        !            10: is the default comparison routine
        !            11: called by \fIqsort\fR and is separated out so that the user can
        !            12: supply his own comparison.
        !            13: .s3
        !            14: The routine is called with the width (in bytes) of
        !            15: an element in r3 and it compares byte-by-byte the element
        !            16: pointed to by r0 with the element pointed to by r4.
        !            17: .s3
        !            18: Return is via the condition codes,
        !            19: which are tested by the instructions ``blt'' and ``bgt''.
        !            20: That is, in the absence of overflow, the 
        !            21: condition (r0) < (r4) should leave the Z-bit off and N-bit
        !            22: on while (r0) > (r4) should leave Z and N off.
        !            23: Still another way of putting it is that for elements
        !            24: of length 1 the instruction
        !            25: .s3
        !            26:        cmpb    (r0),(r4)
        !            27: .s3
        !            28: suffices.
        !            29: .s3
        !            30: Only r0 is changed by the call.
        !            31: .sh "SEE ALSO"
        !            32: qsort (III)
        !            33: .sh BUGS
        !            34: It could be recoded to run faster.

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