计算机组成原理课后答案(白中英主编_第五版_立体化教材)

．(1) x = 2-011*0.100101, y = 2-010*(-0.011110)

[x]浮 = 11101,0.100101 [y]浮 = 11110,-0.011110 Ex-Ey = 11101+00010=11111 [x]浮 = 11110,0.010010(1)

x+y 0 0. 0 1 0 0 1 0 (1)

+ 1 1. 1 0 0 0 1 0

1 1. 1 1 0 1 0 0 (1)

规格化处理:

1.010010

阶码

11100

-4 -4

x-y

0 0. 0 1 0 0 1 0 (1) + 0 0. 0 1 1 1 1 0

0 0 1 1 0 0 0 0 (1)

规格化处理:

0.110000

阶码

11110

x-y=2-2*0.110001

(2) x = 2-101*(-0.010110), y = 2-100*0.010110

[x]浮= 11011,-0.010110 [y]浮= 11100,0.010110

x+y= 1.010010*2 = 2 *-0.101110

9

9

Ex-Ey = 11011+00100 = 11111 [x]浮= 11100,1.110101(0) x+y 1 1. 1 1 0 1 0 1

+ 0 0. 0 1 0 1 1 0

0 0. 0 0 1 0 1 1

规格化处理: 0.101100 阶码x+y= 0.101100*2 -6

x-y

1 1.1 1 0 1 0 1 + 1 1.1 0 1 0 1 0

1 1.0 1 1 1 1 1

规格化处理: 1.011111 阶码

x-y=-0.100001*2 -4

10．(1) Ex = 0011, Mx = 0.110100

Ey = 0100, My = 0.100100 Ez = Ex+Ey = 0111 Mx*My 0. 1 1 0 1

* 0.1 0 0 1

01101 00000 00000 01101 00000 001110101

规格化：

26*0.111011

(2) Ex = 1110, Mx = 0.011010

Ey = 0011, My = 0.111100 Ez = Ex-Ey = 1110+1101 = 1011

计算机组成原理第五版习题答案

11010

[Mx]补 = 00.011010 [My]补 = 00.111100,

11100

[-My]补 = 11.000100

10

00011010

+[-My]

11000100 11011110 10111100

+[My]

00111100 11111000 11110000

+[My]

00111100 00101100 01011000

+[-My]

11000100 00011100 00111000

+[-My]

11000100 11111100 11111000

+[My]

00111100 00110100 01101000

+[-My]

1 1 0 00 1 0 0 0 0 1 0 1 10 0

商 = 0.110110*2-6,

11．

0

0.0 0.01 0.011 0.0110 0.01101 0.01101 计算机组成原理第五版习题答案

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