sign.mac

一个c语言编译器源代码.small-c-for-dos源代码.里面包含基本的库函数

 INCLUDE PROLOG.H
_CC1:
 PUBLIC _sign
_sign:
 MOV BX,2
 ADD BX,SP
 MOV BX,[BX]
 OR BX,BX
 JG $+5
 JMP _CC3
 MOV BX,1
 RET
_CC3:
 MOV BX,2
 ADD BX,SP
 MOV BX,[BX]
 OR BX,BX
 JZ $+5
 JMP _CC4
 MOV BX,0
 RET
_CC4:
 MOV BX,-1
 RET
 INCLUDE EPILOG.H
 END