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TEXT mpvecsub(SB),$0
MOVW alen+4(FP), R4
MOVW b+8(FP), R5
MOVW blen+12(FP), R6
MOVW diff+16(FP), R7
MOVW $0, R8
MOVW R8, R3
CMP R8, R6
B.EQ _sub1
SUB R6, R4, R4
_subloop1:
MOVW.P 4(R0), R1
MOVW.P 4(R5), R2
CMP R3, R8
SBC.S R2, R1
SBC R8, R8, R3
MOVW.P R1, 4(R7)
SUB.S $1, R6
B.NE _subloop1
_sub1:
CMP R8, R4
RET.EQ
_subloop2:
MOVW.P 4(R0), R1
CMP R3, R8
SBC.S R8, R1
SBC R8, R8, R3
MOVW.P R1, 4(R7)
SUB.S $1, R4
B.NE _subloop2
RET
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