B or BL directives cause the processor to move to the "subroutine name" to begin execution. The difference between the two is that the BL instruction is transferred to the child
Copy the address of the next instruction to R14 (LR, link register) before executing the program. Because the BL directive preserves the ground of the next instruction
Address, so using t
One, data transfer instructions 1. Universal Data Transfer Instruction MOV (move) transfer push (push onto the stack) stack Pop (pop from stack) out of stack XCHG (Exchange) Exchange . The MOV instruction format is: MOVNBSP;DST,SRC to perform the operation: (DST) . PUSH stack Instruction Format: PUSHNBSP;SRC Action: (SP) ((SP) +1, (SP)) . POP out stack
bytes (name them byte1 and Byte2), their values should look like this:(Byte1 8byte2
( byte1 8 ) | Byte2
Byte-code instruction flow should be single-byte alignment, only "Tableswitch" and "Lookupswitch" two instruction exception, because their operands are more special, are divided into 4 bytes to open, so the two instructions that also need to set aside the corresponding vacancy
Instruction sets are an important part of the processor architecture. The Instruction Set has two development aspects, including the CISC (Complex Instruction Set) represented by x86 and the Proteus (simplified instruction set) represented by arm and MIPS ). The goal of CISC is to use at least one or more commands to i
ARMV6 devices: IPhone, IPhone2, iphone3g, first generation, second generation IPod Touch ARMV7 equipment: iphone3gs, IPhone4, iphone4s ipad, IPad2, IPad3 (the New ipad), ipad Mini ipod Touch 3G, ipod Touch4 armv7s equipment: IPhone5, IPHONE5C, IPad4 (IPad with Retina Display) Arm64 devices: iphone5s, ipad Air, ipad mini2 (ipad mini with Retina Display) The options associated with the instruction set in Xcode (Build Settings panel architectures): Arch
above mentioned factors have some bad effects on the portability of intrinsic function code, but porting the code containing intrinsic function is undoubtedly a lot easier than inline assembly. In addition, the 64-bit platform no longer supports inline assembly.2. SSE intrinsicVS and GCC support SSE directive Intrinsic,sse have several different versions, the corresponding intrinsic is also included in the different header files, if the only one version of the SSE directive is determined to inc
0. Preface Java virtual machines, like real computers, perform binary machine codes, and we compile. Java source code into a. class file, and the class file is the binary machine code that the Java virtual machine can recognize. Java can recognize the information and machine instructions in the class file and execute these machine instructions. So how does a Java Virtual machine execute these binary machine codes?This article will take you through a very easy example of how the Java virtual mac
This article is reprinted and pasted here to facilitate searching for some commands.
From: http://blog.csdn.net/canfengxiliu/article/details/20144119
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Disclaimer: This article is based on the notes written by
Dalvik Command FormatA piece of Dalvik assembly code consists of a series of Dalvik commands. The command syntax is determined by the instruction bit description and the Instruction
Delphi Pre-compilation Instruction summaryDelphi as a good development tool, not only because it pioneered the "component (Component)" era, the impact is far-reaching, another reason is that it has a very good compiler, Borland (Inprise) company claims that Delphi has the world's fastest compiler, If you have used Visual C + + and Delphi You will obviously appreciate this. Delphi's fast and efficient compiler mainly comes from the rigor of Object Pasc
Instruction (directives) is the most important part of all ANGULARJS applications. Although Angularjs has provided very rich instructions, it is often necessary to create application-specific directives. This tutorial will tell you how to customize instructions and how to use them in real projects. At the end of this article (Part II), I'll instruct you on how to use the angular directive to create a simple Notepad application.
Overview
A directive
I. What is an instruction?In the Angularjs authoritative tutorial, directives can be simply understood as functions running on specific DOM elements, and I think it can also be understood to parse the custom HTML tag into the original tag and add some extended functions (functions) to it.Ii. How does the instruction work?The first is the compile phase, where ANGULARJS traverses the entire document and handl
HDU 5083 Instruction (string processing), hdu5083
Problem DescriptionNowadays, Jim Green has produced a kind of computer called JG. in his computer, the instruction is represented by binary code. however when we code in this computer, we use some mnemonic symbols. for example, ADD R1, R2 means to add the number in register R1 and R2, then store the result to R1. But this
Summary: Although the JMP Directive provides control over transfers, it does not allow any complex judgments to be made. The 80x86 conditional jump instruction provides this kind of judgment.Conditional jump directives are essential elements for creating loops and implementing other conditional execution statements, such as IF...ENDIF. The conditional jump command checks one or more flag bits to determine if they match a particular condition (like the
Does the REP;NOP command execute multiple NOP or 1 NOP?
Originally, adding the rep prefix is the rep instruction until the ECX value is 0. In the kernel code, as in the Spin_lock implementation, you will see REP;NOP such a statement, it is easy to think of the execution of multiple NOP. But in fact it is not so. Look at the demo program below:
#include
#define NOPS (Times) __asm__ __volatile__ ("Rep;nop": "=c" (Result): "C" (Times))
#define MOVSTR (
Http://blog.sina.com.cn/s/blog_5c91824f0102vdkj.htmlThe ARM processor, known for its low power consumption and small size, is based on arm for almost all handset processors, and is widely used in embedded systems, and its performance is also excellent in the same power consumption products.Armv6, ARMv7, armv7s, arm64 are all arm processor instruction sets, all instruction sets are in principle backwards com
The DSAPI multi-functional component programming application-http Monitoring Server and client content is described here, and here is an application for more efficient and faster HTTP listener-based server, client.In this article, you will see unprecedented ultra-simplified ultra-stupid HTTP listening service, unlike in the previous article, in Dsapi, the instruction version contains both the server and the client.Take a look at the use of the method,
clock cycle: The clock cycle, also known as the oscillation period, is defined as the reciprocal of the clock pulse (it can be understood that the clock cycle is the inverse of the monolithic microcomputer external crystal oscillator, such as the crystal oscillator 12M, its time period is 1/12 us), is the most basic, the smallest unit of time in the computer. In a clock cycle, the CPU only completes one of the most basic actions. For some kind of MCU, if the clock frequency of 1MHZ is used, the
B Jump instruction: It is a relative jump instruction, its machine code format is as follows:[31:28] bit is the condition code ; [27:24] bit is "1010" ( 0xeaffffff ) when , indicating B Jump Instructions , for "1011" , it means BL Jump instruction; [23:0] represents an offset address. when jumping with B or bl, the address of the next
MIPs instruction set architecture
The instruction set architecture ISA is fully called the instruction set architecture. MIPS has been continuously expanded since it was proposed in 1988. Its ISA is roughly as follows:
MIPs IThis is the basic MIPS instruction set. Earlier r2000 and r3000 processors implemented this
If you're used to using jquery to manipulate the DOM, you can learn to vue.js with the idea of manually manipulating the DOM, because Vue.js is data-driven and requires no manual manipulation of the DOM. It binds the DOM and the data with some special HTML syntax. Once you create a binding, the DOM is synchronized with the data, and the DOM is updated accordingly whenever the data is changed.
Of course, when using vue.js, you can also use it in conjunction with other libraries, such as jquery.
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