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register4:
PUSH {LR}
10:
BL get_char
MOVS R1, 'R
CMPS R0, R1
BNE 10b
20:
BL get_char
MOVS R1, '0
CMPS R0, R1
BLO 20b
MOVS R1, '9
CMPS R0, R1
BHI 20b
MOVS R1, '1
CMPS R0, R1
BNE 30f
50:
BL get_char
BEQ 60f
MOVS R1, '0
CMPS R0, R1
BLO 50b
MOVS R1, '5
CMPS R0, R1
BHI 50b
ADDS R0, 10
30:
SUBS R0, '0
MOVS R4, 0
ORRS R4, R0
40:
BL get_char
BNE 40b
POP {PC}
60:
MOVS R4, 1
POP {PC}
register3:
PUSH {LR}
10:
BL get_char
MOVS R1, 'R
CMPS R0, R1
BNE 10b
20:
BL get_char
MOVS R1, '0
CMPS R0, R1
BLO 20b
MOVS R1, '7
CMPS R0, R1
BHI 20b
30:
SUBS R0, '0
MOVS R4, 0
ORRS R4, R0
BL get_char
BNE 40b
POP {PC}
|
