¢
¢
¢
¢
¢
¢
¢
Trang 2§ b7b6b5b4b3b2b1b0 727
626
525
121
¢
00111111 +00001000
01000111
63 + 8
71
Trang 3§
§
¢
§
§
§
Trang 4§ 2
0000
0001
0011
1111
1110
1100
1011
1010
1000 0111
0110
0100
0010
0101
1001
1101
+ 0
+ 1 + 2 + 3 + 4 + 5 + 6 + 7
– 0 – 1
– 2 – 3 – 4 – 5 – 6
– 7
Trang 5§ 2
0000
0001
0011
1111
1110
1100
1011
1010
1000 0111
0110
0100
0010
0101
1001
1101
+ 0
+ 1 + 2 + 3 + 4 + 5 + 6 + 7
– 0 – 1
– 2 – 3 – 4 – 5 – 6
– 7
Trang 6§ 2
§
§
0000
0001
0011
1111
1110
1100
1011
1010
1000 0111
0110
0100
0010
0101
1001
1101
+ 0
+ 1 + 2 + 3 + 4 + 5 + 6 + 7
– 0 – 1
– 2 – 3 – 4 – 5 – 6
– 7
0100 +1011
1111
Trang 7§
W-‐1
§
§
~x + 1 = -x
0000
0001
0011
1111
1110
1100
1011
1010
1000 0111
0110
0100
0010
0101
1001
1101
0
+ 1 + 2 + 3 + 4 + 5 + 6 + 7
– 8 – 7
– 6 – 5
– 4 – 3 – 2
– 1
Trang 8§
§
§
¢
Trang 9§
§
§
00000001
00000000
00000010 00000011 +???????? +????????
Trang 10§
§
§
00000001
00000010 00000011 +???????? +????????
Trang 11§
§
§
00000001
00000010 00000011 +11111110 +11111101
Trang 12l
l
l
l
Trang 13¢
0"
–2w –1"
+2w" Positive overflow"
Negative overflow"
–2w"
+2w –1"
0"
–2w –1"
+2w –1"
x + y!
Normal"
0"
2w–1"
2w"
Unsigned"
Two’s"
complement"
0"
+2w–1"
–2w–1"
0"
2w–1"
2w"
Unsigned"
Two’s"
complement"
0"
+2w–1"
–2w–1"
Trang 14§ UMin
§
§
§
§
§
§