52 lines
645 B
ArmAsm
52 lines
645 B
ArmAsm
TEXT memcpy(SB), $-4
|
|
TEXT memmove(SB), $-4
|
|
MOV from+8(FP), R1
|
|
MOV n+16(FP), R2
|
|
|
|
CMP R0, R1
|
|
BEQ _done
|
|
BLT _backward
|
|
|
|
_forward:
|
|
MOV R0, R7
|
|
ADD R0, R2, R3
|
|
BIC $15, R2, R4
|
|
CBZ R4, _floop1
|
|
ADD R0, R4, R4
|
|
|
|
_floop16:
|
|
MOVP (R1)16!, R5, R6
|
|
MOVP R5, R6, (R7)16!
|
|
CMP R4, R7
|
|
BNE _floop16
|
|
|
|
_floop1:
|
|
CMP R3, R7
|
|
BEQ _done
|
|
MOVBU (R1)1!, R5
|
|
MOVBU R5, (R7)1!
|
|
B _floop1
|
|
|
|
_done:
|
|
RETURN
|
|
|
|
_backward:
|
|
ADD R2, R1, R1
|
|
ADD R2, R0, R3
|
|
BIC $15, R2, R4
|
|
CBZ R4, _bloop1
|
|
SUB R4, R3, R4
|
|
|
|
_bloop16:
|
|
MOVP -16(R1)!, R5, R6
|
|
MOVP R5, R6, -16(R3)!
|
|
CMP R4, R3
|
|
BNE _bloop16
|
|
|
|
_bloop1:
|
|
CMP R0, R3
|
|
BEQ _done
|
|
MOVBU -1(R1)!, R5
|
|
MOVBU R5, -1(R3)!
|
|
B _bloop1
|