iscons.mac

--- --- ---基于C语言的编译器的 简单实现

 INCLUDE PROLOG.H
 EXTRN _Udevice:WORD
_CC1:
 PUBLIC _iscons
_iscons:
 MOV BX,OFFSET _Udevice
 XCHG DX,BX
 MOV BX,2
 ADD BX,SP
 MOV BX,[BX]
 ADD BX,BX
 ADD BX,DX
 MOV BX,[BX]
 XCHG DX,BX
 MOV BX,1
 CMP DX,BX
 MOV BX,CX
 JNZ $+3
 INC BX
 RET
 INCLUDE EPILOG.H
 END