汇编程序

[l202459768]

STACK_TOP EQU 0x20002000
AREA RESET,CODE,READONLY
DCD STACK_TOP
DCD START
ENTRY
START
CMP R0,#0
BGT R0GT0
BEQ R0EQ0
MOV R4,#3
MOV R5,#5
MUL R2,R0,R0
MUL R3,R2,R4
ADD R1,R3,R5
B CMPEND
R0EQ0
MOV R1,#0
END
R0GT0
MOV R6,#2
MOV R7,#3
MUL R2,R0,R0
MUL R3,R2,R0
MUL R4,R3,R6
MUL R5,R0,R7
ADD R1,R5,R4
ADD R1,#7
CMPEND
DEADLOOP
B DEADLOOP
END

455.s(8): error: A1516E: Bad symbol 'R0GT0', not defined or external
455.s(15): error: A1516E: Bad symbol 'CMPEND', not defined or external
怎末改？