參數(shù)資料
型號(hào)： 20726
英文描述： 3DNow!? Technology Manual AMD-K6 Processor Multimedia Technology
中文描述： 3DNow?。考夹g(shù)手冊(cè)的AMD - K6處理器多媒體技術(shù)
文件頁數(shù)： 29/120頁
文件大?。?/td> 1284K
代理商： 20726
MMX Instruction Set
23
20726D/0—January 2000
AMD-K6 MMX Enhanced Processor Multimedia Technology
Preliminary Information
PACKSSWB
mnemonic
opcode
description
PACKSSWB mmreg1, mmreg2/mem64 0F 63h
Pack with saturation signed 16-bit operands into signed 8-bit
results
Privilege:
Registers Affected:
Flags Affected:
Exceptions Generated:
none
MMX
none
The PACKSSWB instruction performs a pack and saturate operation on four signed
16-bit values in the first operand and four signed 16-bit values in the second operand.
The eight signed 8-bit results are placed in the specified MMX register.
The pack operation is a data conversion. The PACKSSWB instruction converts or
packs the eight signed 16-bit values into eight signed 8-bit values, applying saturating
arithmetic. If the signed 16-
bit value is less than –128 (80h), it saturates to –128 (80h).
If the signed 16-bit value is greater than 127 (7Fh), it saturates to 127 (7Fh). All values
between –128 and 127 are represented by their signed 8-bit value.
The first operand must be an MMX register. In addition to providing the first operand,
this MMX register is the location where the result of the pack and saturate operation
is stored. The second operand can be an MMX register or a 64-bit memory location.
Exception
Invalid opcode (6)
Device not available (7)
Real
X
X
Virtual
8086
X
X
Protected Description
X
X
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.
During instruction execution, the stack segment limit was exceeded.
During instruction execution, the effective address of one of the segment
registers used for the operand points to an illegal memory location.
One of the instruction data operands falls outside the address range 00000h
to 0FFFFh.
A page fault resulted from the execution of the instruction.
An exception is pending due to the floating-point execution unit.
Stack exception (12)
General protection (13)
X
X
Segment overrun (13)
X
X
Page fault (14)
Floating-point exception
pending (16)
Alignment check (17)
X
X
X
X
X
X
X
An unaligned memory reference resulted from the instruction execution,
and the alignment mask bit (AM) of the control register (CR0) is set to 1.
(In Protected Mode, CPL = 3.)
相關(guān)PDF資料
PDF描述
20736 Enhanced Am486DX Family Data Sheet? 1.87MB (PDF)
2075 data delay devices
208-501-21-38 LED TELEFONSOCKEL T6.8 12V ROT
208-521-21-38 LED TELEFONSOCKEL T6.8 12V GELB
208-532-21-38 LED TELEFONSOCKEL T6.8 12V GRUEN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
20727 制造商:Schneider Electric 功能描述:CIRCUIT BREAKER DECLIC 20A 制造商:Schneider Electric 功能描述:CIRCUIT BREAKER 1 POLE + NEUTRAL 20 A
20728 制造商:Schneider Electric 功能描述:CIRCUIT BREAKER 1 POLE + NEUTRAL 25 A
207289-000 制造商:TE Connectivity 功能描述:CE-14-06000-P-ABRAS-WHEEL 制造商:TE Connectivity 功能描述:CE-14-06000-P-ABRAS-WHEEL - Bulk
20729 制造商:Schneider Electric 功能描述:CIRCUIT BREAKER DECLIC 32A 制造商:Schneider Electric 功能描述:CIRCUIT BREAKER 1 POLE + NEUTRAL 32 A
207292-1 功能描述:標(biāo)準(zhǔn)環(huán)形連接器 CPC RECP 17-16 RoHS:否 制造商:Hirose Connector 系列:EM-W 產(chǎn)品類型:Accessories 位置/觸點(diǎn)數(shù)量:1 觸點(diǎn)類型: 觸點(diǎn)電鍍: 安裝風(fēng)格:Cable 外殼材質(zhì): 端接類型:Clamp 電壓額定值:
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