P291-6.21(1)
6.21 用原码加减交替法计算x÷y。(1)x=0.100111,y=0.101011
解:Y*=00.101011,[-Y*]补=11.010101
P292-6.26(1)
6.26 按机器补码浮点运算步骤计算[x±y]补。(1) x=0.101100×2-011,y= -0.011100×2-010【解】依据浮点加减法运算步骤①对阶 [EX]补=1,101 [-EY]补=0,010 有[EX-EY]补=[EX]补+ [-EY]补=1,111 为负数,说明EX<EY,故阶码向Y对齐。且对阶后x=0.0101100×2-010(附加位为0,可省略),y= -0.011100×2-010
P292-6.26(1)
6.26 按机器补码浮点运算步骤计算[x±y]补。对阶后x=0.010110×2-010,y= -0.011100×2-010②尾数运算 [Mx+My]补=0.010110 [Mx-My]补=0.010110 +1.100100 +0.011100 ...


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