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參數(shù)資料
| 型號(hào)： | 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(cè)3DNow?。考夹g(shù)手冊(cè) |
| 文件頁數(shù)： | 28/72頁 |
| 文件大小： | 845K |
| 代理商： | 21928 |
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18
3DNow! Instruction Set
Chapter 2
3DNow! Technology Manual
21928G/0—March 2000
FEMMS
mnemonic
opcode
description
FEMMS
0F 0Eh
Faster Enter/Exit of the MMX or floating-point state
Privilege:
Registers Affected:
Flags Affected:
Exceptions Generated:
none
MMX
none
Like the EMMS instruction, the FEMMS instruction can be used to clear the MMX
state following the execution of a block of MMX instructions. Because the MMX
registers and tag words are shared with the floating-point unit, it is necessary to clear
the state before executing floating-point instructions. Unlike the EMMS instruction,
the contents of the MMX/floating
-
point registers are undefined after a FEMMS
instruction is executed. Therefore, the FEMMS instruction offers a faster context
switch at the end of an MMX routine where the values in the MMX registers are no
longer required. FEMMS can also be used prior to executing MMX instructions where
the preceding floating-point register values are no longer required, which facilitates
faster context switching.
Exception
Invalid opcode (6)
Real
X
Virtual
8086
X
Protected
X
Description
The emulate MMX instruction bit (EM) of the control register (CR0) is set
to 1.
Save the floating-point or MMX state if the task switch bit (TS) of the
control register (CR0) is set to 1.
An exception is pending due to the floating-point execution unit.
Device not available (7)
X
X
X
Floating-point exception
pending (16)
X
X
X
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| 21934 | CAPACITIVE SENSOR |
| 21A | Low-Frequency Dual EconOscillator |
| 21B | Low-Frequency Dual EconOscillator |
| 21C | Low-Frequency Dual EconOscillator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 219-2-8235-1 | 制造商:Airpax 功能描述:CIRCUIT PROTECTOR HYD MAGNETIC 制造商:Airpax 功能描述:CIRCUIT BREAKER MAG-HYDR LEVER 制造商:Sensata Technologies 功能描述:219-2-8235-1 /Pole # 2 /Prod Family: 0209 |
| 219-2-8696-1 | 制造商:Airpax 功能描述:CIRCUIT BREAKER MAG-HYDR LEVER 制造商:Sensata Technologies 功能描述:219-2-8696-1 /Pole # 2 /Prod Family: 0209 |
| 21-9290 | 制造商:Tenma 功能描述:Soldering Iron Pencil 25W 制造商:TENMA 功能描述:PENCIL SOLDERING IRON 25 WATT |
| 219-2-9344-1 | 制造商:Airpax 功能描述:CIRCUIT PROTECTOR HYD MAGNETIC 制造商:Sensata Technologies 功能描述:219-2-9344-1 /Pole # 2 /Prod Family: 0209 |
| 21-9295 | 制造商:Tenma 功能描述:Soldering Iron Pencil 45W 制造商:TENMA 功能描述:PENCIL SOLDERING IRON 40 WATT |
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