8087 coprocessor

order to wait for an external interrupt to arrive, after the interruption can continue to execute the following program.Wait waits for the instruction to leave the processor in a idling state , which can also be used to wait for an external interrupt to occur, but still return the wait instruction after the interrupt has been completed.ESC (Escape) swap instruction where mem points to a storage unit, the ESC command sends the contents of the storage unit to the data bus . Of course, the ESC dir

procedure can be continued after the interruption is complete.. Wait for commandThis instruction causes the processor to be idle, and it can also be used to wait for the external interrupt to occur, but returns the waiting instruction to continue the virtue after the interruption has ended.. ESC Code Change InstructionsFormat ESC MemThe MEM indicates a storage unit in which the ESC instruction sends the contents of the storage unit to the data bus. Of course, the ESC directive does not allow im

command does not allow immediate count and register addressing. when using Coprocessor to execute some operations, this command can be directed to the instruction or operand from the memory. A coprocessor (such as 8087) is a hardware that can be selected to increase the speed.. LOCK blocking commandThis command is a prefix that can be combined with other command

program to use a large memory space, and allocate memory, Reclaiming memory can cause the program to run longer. But if you use the Xrange function implemented on the yield, all of the intermediate variables in it will use only one memory $i, which will save you less time and space. So why does yield have this effect? Lenovo's yield in Lua is a concept of the coprocessor. In the Lua language, when a program runs to yield, it records the context envi

Linux Kernel full analysis-Based on 0.12 kernel chapter 4th 80 x86 protection mode and Programming Control Register (Cr0 ~ (3-3) used to control and determine the operating mode of the processor and the features of the current task, as shown in Figure 4-3. Cr0 contains the system control mark that controls the operating mode and status of the processor; CR1 is not needed; Cr2 contains the linear address that leads to page errors; Cr 3 contains the base address of the page Directory table physic

Hqueue: hbase-based message queue Ling Bai? 1. hqueue Introduction Hqueue is a distributed and persistent Message Queue developed by the offline system team of Taobao search web page capturing Based on hbase. It uses htable to store message data, uses hbase coprocessor to encapsulate the original keyValue data into the message data format for storage, and encapsulates the hqueue client API for Message Access Based on hbase client API. Hqueue can be ef

arithmetic, but is not mandatory (float in C language usually refers to IEEE single precision, while double refers to dual precision ). This standard is fully known as the IEEE binary floating point Number Arithmetic standard (ANSI/IEEE Std 754-1985), also known as IEC 60559: 1989, the binary floating point arithmetic of the microprocessor system (originally numbered IEC 559: 1989) [1]. Later, there was also the IEEE 854-1987 standard for floating-point numbers unrelated to the base, where the

short 4 short: the RAM on the display card has an error or no RAM, not a fatal error 3 short, 4 short, 2 short: the display data cable is loose, the display card plug is unstable, or the display card is damaged. 3 short, 4 short, 3 short: no display card rom bios found 4 short, 2 short, and 1 short: Real-time clock error of the system 4 short 2 short 2 short: system startup error, improper CMOS settings or BIOS damage 4 short, 2 short, 3 short: the Gate A20 switch in the keyboard controller (80

,0x100000je 1b //After checking the 8087 math coprocessor, start the In-memory page call CHECK_X87JMP after_page_tablesafter_page_tables: //The following is the parameter of the main function into the stack pushl $0pushl $0pushl $0PUSHL $L 6//The address of the main function into the stack PUSHL $_main //Start memory paging jmp setup_pagingThe above push _main operation is important because after t

multi-core processors are becoming more and more popular, there is no easy way to let us write software to release the power of multi-core. The answer is: Yes. With the rise of Golang, Erlang, scale and other programming languages, new concurrency patterns are becoming clearer. Just as procedural programming and object-oriented, a good programming model needs to have a very concise kernel, as well as a rich extension on this, can solve the real world of various problems. In this paper, go langua

The kernel directory kernelmath contains the math coprocessor simulation code file, which contains 9 C language programs. See Table 11-1. This chapter is closely related to the specific hardware structure. The kernel directory kernel/math contains the math coprocessor simulation code file, which contains 9 C language programs. See Table 11-1. The content of this chapter is closely related to the specific ha

Since mid-February, I've been looking at Python's aiohttp (or using the asynchronous library to write a reptile). Last weekend, I finally wrote a passable version. Write one's own experience here. Async/await This is insignificant in Python's coprocessor. And a few of the posts I wrote in February were a preface to this. One months ago, I was also ignorant of them, very do not understand the process, through the one months of learning, I suddenly en

success ;} /*** jump to the background homepage ** @ return */Public String index () {getrequest (). setattribute ("adminame", cookieutil. getcookievalue (constant. admin_name, getrequest (); Return success;}/*** exit the system ** @ return */} Note: When you enter the access URL: http: // localhost: 8087/iask/admin, the suffix ". JSP "does not exist. This address is accessed through urlrewrite. XML filter is parsed to http: // localhost:

Preface The synergy program is similar to the thread, that is, an execution sequence. It has its own independent stack, local variables, and command pointers, and shares global variables with other coders and most other things. In terms of concept, the main difference between a thread and a collaborative program is that a program with multiple threads can run several threads at the same time, but a collaborative program needs to run in collaboration with each other. That is to say, a program wit

[-] 1. Control Register Protection Control bit Coprocessor control bit Cr2 AND Cr 3 2. system address register Global Descriptor Table register GDTR Local Descriptor Table register ldtr Interrupt Descriptor Table register idtr Task status segment register tr 80386 The following table lists the control registers and system address registers. They are used to control the way of work, control the implementation of the

same access control attributes. Register C3 in MMU is used to control the attribute configuration related to the domain. Table 1Registers related to MMU operations ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Memory Function -------------------------------------- Some BITs in register c1 are used to configure some MMU operations. Register C2 stores the base address of the page table in memory Register C3 sets domain access control attributes Register C4 reserved (resvere

EMC China Research Institute YenkaiBrief introductionmulti-core processors are becoming more and more popular, there is no easy way to let us write software to release the power of multi-core. The answer is: Yes. With the rise of Golang, Erlang, scale and other programming languages, new concurrency patterns are becoming clearer. Just as procedural programming and object-oriented, a good programming model needs to have a very concise kernel, as well as a rich extension on this, can solve the rea

Preface The synergy program is similar to the thread, that is, an execution sequence. It has its own independent stack, local variables, and command pointers, and shares global variables with other coders and most other things. In terms of concept, the main difference between a thread and a collaborative program is that a program with multiple threads can run several threads at the same time, but a collaborative program needs to run in collaboration with each other. That is to say, a program wit

Overview HBase is a Key-value database based on Hadoop, which provides efficient random read and write services on HDFS data, perfectly fills the pitfalls of Hadoop MapReduce only for batch processing and is being used by more and more users. As an important feature of HBase, Coprocessor was added to the HBase 0.92 version and was widely popular With the coprocessor, the user can write code that runs on th

Hbase supports Coprocessor (Coprocessor) Since 0.92. It aims to enable users to run their code on the regionserver to move computing programs Hbase supports Coprocessor (Coprocessor) Since 0.92. It aims to enable users to run their code on the regionserver to move computing programs Hbase supports