get_bits1.asm

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	AREA	|.text|, CODE, ARM
	
	EXPORT get_bits1
	

|get_bits1| PROC
;程序入口
	stmdb     sp!, {r4 - r6, lr}
	
	mov         r7, r0
	ldr         r1, [r7, #8] 
    ldr         r3, [r7, #0] 
    and         r0, r1, #7 
    ldrb        r2, [r3, +r1, asr #3] 
    add         r3, r1, #1 
    str         r3, [r7, #8] 
    mov         r3, r2, lsl r0 
    and         r3, r3, #0xFF
    movs        r3, r3, lsr #7 	
    mov         r0, r3


|$RETURN|
	ldmia     sp!, {r4 - r6, pc}

    END

	ENDP  ; |get_bits1|