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.text
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.text
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.global memcpy
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.global memcpy
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memcpy:
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memcpy:
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 - 
 
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add     r3, r1, #3
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	add     r3, r1, #3
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bic     r3, r3, #3
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	bic     r3, r3, #3
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cmp     r1, r3
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	cmp     r1, r3
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stmdb   sp!, {r4, lr}
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	stmdb   sp!, {r4, lr}
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beq     case_4
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	beq     case_4
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case_1:
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case_1:
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cmp     r2, #0
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	cmp     r2, #0
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movne   ip, #0
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	movne   ip, #0
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beq     case_3
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	beq     case_3
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case_2:
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case_2:
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ldrb    r3, [ip, r1]
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	ldrb    r3, [ip, r1]
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strb    r3, [ip, r0]
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	strb    r3, [ip, r0]
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add     ip, ip, #1
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	add     ip, ip, #1
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cmp     ip, r2
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	cmp     ip, r2
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bne     case_2
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	bne     case_2
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case_3:
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case_3:
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mov     r0, r1
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	mov     r0, r1
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ldmia   sp!, {r4, pc}
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	ldmia   sp!, {r4, pc}
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case_4:
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case_4:
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add     r3, r0, #3
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	add     r3, r0, #3
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bic     r3, r3, #3
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	bic     r3, r3, #3
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cmp     r0, r3
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	cmp     r0, r3
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bne     case_1
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	bne     case_1
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movs    r4, r2, lsr #2
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	movs    r4, r2, lsr #2
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moveq   lr, r4
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	moveq   lr, r4
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beq     case_6
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	beq     case_6
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mov     lr, #0
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	mov     lr, #0
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mov     ip, lr
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	mov     ip, lr
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case_5:
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case_5:
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ldr     r3, [ip, r1]
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	ldr     r3, [ip, r1]
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add     lr, lr, #1
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	add     lr, lr, #1
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cmp     lr, r4
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	cmp     lr, r4
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str     r3, [ip, r0]
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	str     r3, [ip, r0]
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add     ip, ip, #4
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	add     ip, ip, #4
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bne     case_5
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	bne     case_5
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case_6:
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case_6:
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ands    r4, r2, #3
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	ands    r4, r2, #3
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beq     case_3
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	beq     case_3
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mov     r3, lr, lsl #2
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	mov     r3, lr, lsl #2
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add     r0, r3, r0
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	add     r0, r3, r0
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add     ip, r3, r1
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	add     ip, r3, r1
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mov     r2, #0
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	mov     r2, #0
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case_7:
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case_7:
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ldrb    r3, [r2, ip]
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	ldrb    r3, [r2, ip]
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strb    r3, [r2, r0]
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	strb    r3, [r2, r0]
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add     r2, r2, #1
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	add     r2, r2, #1
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cmp     r2, r4
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	cmp     r2, r4
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bne     case_7
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	bne     case_7
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b       case_3
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	b       case_3
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