cpuid instruction

The arm instruction set is relatively simple. This article describes the important and difficult-to-understand aspects of arm instruction sets. I. The arm instruction set is 32-bit, The program starts from the arm instruction set, including all abnormal interruptions are automatically converted to the arm State, and al

A Java VM instruction is composed of an Opcode with a byte length that represents a specific meaning and a zero number that represents the operands of this operation parameter. In a virtual machine, many commands do not contain operands, but only one operation code. If an exception is ignored, the JVM interpreter can work effectively with the code. Copy codeThe Code is as follows: do { Automatically calculate the PC register and retrieve the operation

"copyright notice: respect for the original, reproduced please retain the source: blog.csdn.net/shallnet, the article only for learning Exchange, do not use for commercial purposes"at the very bottom of the computer operation, all computer processors operate the data according to the binary code defined by the manufacturer within the processor, which defines that the processor should take advantage of the data provided by the programmer to perform the corresponding functions, which are known as

Analysis of the implementation principle of polymorphism in Java from the perspective of virtual machine instruction executionA few days ago a few questions were suddenly asked by a "guy," one of which is: what is the implementation of polymorphism in Java?I think, this certainly is not from the grammatical point of view to explain the polymorphic bar, vaguely remember that the class file format is related to the method table, but do not know when the

With Android apps that have been recompiled or repackaged by friends who have used apktool experience, Apktool can put Dex filesbytecode is converted to Smali code, How does this tool parse and generate Smali code for DEX? This will require thethe format of the Dex file is familiar and requires mastering the Dalvik Directive byte code format, and can be translated into the corresponding Smali code. I'm going to write a series of articles to analyze the format of the Dex file, the format of the D

What is the instruction set:The Instruction Set is stored in the CPU and provides guidance and Optimization for CPU operations.Hardware. With these instruction sets, the CPU can run more efficiently.The Instruction Set is an interface between software and CPU, while the CPU is the real-listed interface.An

BasisIn addition to the built-in directives, Vue.js also allows the registration of custom directives. A custom directive provides a mechanism to map changes in data to DOM behavior.You can Vue.directive(id, definition) register a global custom directive with a method that receives two parameter instruction IDs and definition objects . You can also directives register a local custom directive with the component's options.hook functionThe definition ob

Modified from: http://bdxnote.blog.163.com/blog/static/84442352015327011988/In this tribute to the original, most of the online posts are copied from a jump condition to write the wrong post, harm I almost want to suspect life,-_-!.This post is mainly to change the original author's jump condition to the C language logical expression of the wording, so look more comfortable, and will not produce ambiguity Direct Transfer Instructions

RISC is the abbreviation of "Reduced instruction set Computing" in English, meaning "simplified instruction set" in Chinese. It is developed on the basis of the CISC instruction system, and some people test the CISC machine to show that the use frequency of various instructions is quite disparity, the most commonly used is some simple instructions, they o

Logic directives:Logical operation instruction and, or, not, XOR, TESTShift Commands SHL, SHR, SAL, SAR, ROL, ROR, RCL, RCRLogical non-directive: not OPR; OPR cannot affect flag bit for immediate numberLogic and directives: and DST, SRCLogic or directives: or DST, SRCXOR /Directive : + DST, SRCtest Instruction : OPR1, OPR2SF ZF PF is set according to the result of operation(1) Shift

Independent scopes and function parametersBy using the local scope attribute, you can pass an external function parameter (for example, a function defined in the controller $ scope) to the instruction. These operations can be completed. The following is an example of defining a local scope attribute named add to save the reference of the input function:Angular. module ('ctictivesmodule '). Directive ('isolatedscopewithcontroller', func

) Short format: Out dx, Al (bytes)Out dx, ax (word)Operation: (dx) (Dx) + 1, (dx) On a IBM-PC machine, an external device can have a maximum of 65536 I/O Ports, the port (that is, the peripheral port address) is 0000 ~ Ffffh. The first 256 ports (0 ~ FFH) can be directly specified in the command, which is the port in the long format. At this time, the machine command is expressed in two bytes, and the second byte is the port number. therefore, you can specify the port number in the long format,

Fcgidbusyscaninterval directive Description: Scan the interval for a busy timeout process Syntax: Fcgidbusyscaninterval seconds Default: Fcgidbusyscaninterval 120 Environment: Server Configuration Status: External The corresponding old instruction: Busyscaninterval The module will perform a fcgidbusytimeout check in this interval. Fcgidbusytimeout directiveDescription: Kill the FASTCGI application after processing request exceeds Fcgidb

The 8086CPU transfer instruction is divided into the following categories:1. Unconditional transfer instructions (e.g., JMP)2. Conditional Transfer Directives3. Cyclic instructions (e.g. loop)4. Process5. InterruptsOne, operator offsetHandled by the compiler, is a pseudo-instruction, the function is to get the offset address of the labelIn question 9.1, the data to be copied: the length of the mov ax,bx

Csapp, the third edition of "in-depth understanding of computer systems: A programmer's Perspective", is a good book, but it needs to be quite basic in reading. Moreover, some of the expressions are not straightforward.For example, the No. 463 page mentions why the assembler sets the initial value of the reference in the call instruction to-4 (for 32-bit systems). Explained vague later. In conjunction with the expansion of the Code calculation formula

Instruction Cycle The instruction cycle is the sum of the time that the CPU takes out an instruction from memory and executes the instruction, typically consisting of several machine cycles, from the fetch instruction to the analysis command to the time required to complete

Tag:ioaros use file on code efas 1, write the. c or. m file in the shell terminal, you need to compile the. o file (that is, gcc-c ***.c/***.m), you can generate ***.O file 2, in the shell input AR CRS lib***.a ***.O, you can generate LIB***.A library file 3, Enter NM./***.out in the shell to view the binary file 4, enter the Lipo-info lib***.a file in the shell terminal, or the file lib***.a, if the output is X86, the instruction set of the Mac, if

The types and functions of left-shift and right-hand commands:left shift instruction: the left shift command moves the bit bits of the operand to the left n bits, and the vacated bits are filled with 0.The left-shift directive contains SAL and SHL, and the two instructions are the same, and the vacated bits are filled with 0.where to move Sal's instruction usage:. section. Text.global _start_start:movb $0b1

There are currently several instruction sets for iOS:I386:macARMV6:IPHONE,IPHONE2,IPHONE3G, first generation and second generation ipod TouchArmv7:iphone 3GS, iphone 4, iphone 4s, IPod 3g/4g/5g, ipad, ipad 2, ipad 3, ipad MiniARMV7S:IPHONE5,IPHONE5C, IPad 4Armv8/arm64:iphone 6 (Plus), IPhone 5s, ipad Air (2), Retina ipad Mini (2,3)NBSP; The machine's support for the instruction set is backwards compatible

obtained from rsp + 8, it is obtained from the rsp + 40 (40 = 4*8 + 8), which indicates that although the first four parameters are transmitted through registers, they still occupy the corresponding space in the stack, I understand this to ensure compatibility between _ stdcall and _ cdecll.Use Instruction Set optimization (sse avx, etc)First, let's take a look at the SIMD register.The SIMD registers used by SSE are 128bit, with a total of 16, fr