• 2022-05-29
    下面两组指令,I1和I2、I3和I4之间存在数据冒险,下列说法正确的是_______I1: LDA R1,A ;# M(A)→R1,M(A)是存储器单元I2: ADD R2,R1; # (R2)+(R1)→R2I3: ADD R3,R4; # (R3)+(R4)→R3I4: MUL R4,R5; # (R4)×(R5)→R4
    A: I1和I2是RAW、I3和I4是WAR
    B: I1和I2是WAR、I3和I4是RAW
    C: I1和I2是WAW,I1和I2是WAR
    D: I1和I2是WAR,I1和I2是WAR