參數(shù)資料
型號: 21928
英文描述: Low-Frequency, Spread-Spectrum EconOscillator
中文描述: 的AMD - K6 - 2E處理器數(shù)據(jù)手冊3DNow!?技術(shù)手冊
文件頁數(shù): 16/72頁
文件大?。?/td> 845K
代理商: 21928
6
3DNow! Technology
Chapter 1
3DNow! Technology Manual
21928G/0—March 2000
Data Types
3DNow! technology uses a packed data format. The data is
packed in a single, 64-bit 3DNow!/MMX register or a quadword
memory operand.
Figure 2 shows the 3DNow! floating-point data type. D0 and D1
each hold an IEEE 32-bit single-precision, floating-point
doubleword.
Figure 2.
3DNow! Data Type
Figure 3 on page 6 shows the format of the IEEE 32-bit,
single-precision, floating-point format.
Figure 3. Single-Precision, Floating-Point Data Format
63
0
32 31
(32 bits x 2) Two packed, single-precision, floating-point doublewords
D0
D1
0
31
S
32-bit, single-precision, floating-point doubleword
30
22
Significand
Biased Exponent
Value definitions
1.
X=(–1)
S
*0
2.X=(–1)
S
*2
(Biased Exponent – 127)
*Significand
3.X=Undefined
Biased Exponent=0
0<Biased Exponent<FFh
Biased Exponent=FFh
X is the value of the 32-bit, single-precision, floating-point doubleword.
23
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