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Monster Media 1993 #2
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FNROR.ASM
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Assembly Source File
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1992-10-18
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1KB
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76 lines
; File......: FNROR.ASM
; Author....: Ted Means
; CIS ID....: 73067,3332
; Date......: $Date$
; Revision..: $Revision$
; Log file..: $Logfile$
;
; This is an original work by Ted Means and is placed in the
; public domain.
;
; Modification history:
; ---------------------
;
; $Log$
;
; $DOC$
; $FUNCNAME$
; FN_ROR()
; $CATEGORY$
; Miscellaneous
; $ONELINER$
; Rotate bits in an integer to the right
; $SYNTAX$
;
; fn_ror( <nInt> | <cInt>, <nBits> ) -> nResult
;
; $ARGUMENTS$
;
; <nInt> may either be a numeric integer, or a 16-bit character string
; that is the binary representation of a numeric integer. <nBits>
; must be a numeric integer.
;
; $RETURNS$
;
; <nResult>, a numeric
;
; $DESCRIPTION$
;
; The value returned is obtained by rotating the bits in <nInt>
; to the right. <nBits> determines the number of bits to rotate.
; If any parameters are invalid, the function will return zero.
;
; $EXAMPLES$
;
; nX := 12
; ? fn_ror( nX, 2 ) // 3
;
; $SEEALSO$
;
; $INCLUDE$
;
; $END$
;
;
IDEAL
PUBLIC FN_ROR
EXTRN __FNCBALL:FAR
SEGMENT _FNNET WORD PUBLIC "CODE"
ASSUME CS:_FNNET
PROC FN_ROR FAR
MOV AX,4ED3h
MOV DX,0CBFAh
JMP __FNCBALL
ENDP FN_ROR
ENDS _FNNET
END