跪求大佬指点，下面这个汇编代码如何实现画两点之间的斜线的。菜鸟真的看不懂
LINEZHENGZHENG: ;Y2≥Y1,X2≥X1
MOV AH,0CH
MOV AL,COLOR
MOV BH,0
MOV CX,X1
MOV DX,Y1
LINE1:ADD SI,(Y2-Y1)
CMP SI,(X2-X1)
JBE LINE2
SUB SI,(X2-X1)
INC DX
LINE2:ADD DI,(X2-X1)
CMP DI,(Y2-Y1)
JBE LINE3
SUB DI,(Y2-Y1)
INC CX
LINE3:INT 10H
CMP CX,X2
JB LINE1
LEA BX,EXIT
JMP BX