avx registers

When you use the intrinsics function to operate the SIMD Instruction Set (MMX/SSE/avx, etc.), the SIMD data types of different lengths are displayed, which are divided into multiple compression formats. Therefore, I have designed a set of SIMD variable naming rules to effectively improve code readability. 1. Introduction to SIMD Data Types SIMD data types include --_ M64: 64-bit tightening INTEGER (MMX )._ M128: 128-bit tightening single precision (SS

Upgrade Redhat 5.5 GCC to 4.7.1 to compile AVX code The GCC compiler of Redhat is version 4.1, which does not support SSE4, AVX, and AVX2 well. It is recommended that the GCC compiler be later than 4.7. So we started the GCC upgrade. Because Redhat 5.5 is installed on a virtual machine, the online upgrade cannot be completely solved. After several attempts, the following process is feasible. The main refere

Application of AVX Instruction Set in Btrfs Each time a new X86 processor is released, a new instruction set with two interfaces is added. AVX is one of the new instruction sets that have been introduced and continuously improved over the past two years. Unfortunately, most of the new instruction sets do not bring too much improvement to daily use. However, if you plan to use the Btrfs file system, pay atte

#include #include#include#includeusing namespacestd;voidTest1 (Double*a,Double*b,Double*re) {size_t T=clock (); for(intK =0; K 4; k++) { for(inti =0; I 100000000; i++) {Re[i]= A[i] +B[i]; }} size_t en=clock (); coutEndl;}voidTest2 (Double*a,Double*b,Double*re) {size_t T=clock (); __m256d M1, M2; for(intK =0; K 4; k++) { for(inti =0; I 100000000; i + =4) {M1= _MM256_SET_PD (A[i], a[i +1], A[i +2], A[i +3]); M2= _MM256_SET_PD (B[i], b[i +1], B[i +2], B[i +3]); __m256d L1

Introduction to registers in VIM and about VIM registers When we used to paste text copied from other places in vim, we always used shift + inert. At that time, we thought, could we directly paste the text like p, you do not have to enter the insert mode and paste it again. Later, I read the introduction to the vim register in vim practical skills, and found that there are many articles here, so I will shar

byte data value of the 2000:0000 address cell into the AL (8-bit) register. Reads the font data from the 2000:0001 address unit to a CX (16-bit) register. [] Represents a memory unit in which 0 represents an offset address, and which segment is offset. 8086CPU automatically reads the segment address of the DS data most memory cells. The final register value is:bx=2000ds=2000ax=0011cx=3322 The test is as follows: Similarly, DS and CS and other segment address

[-] 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 w

Flask registers the variables to the template, and flask registers the template. When using the python Flask framework and referring to Flask Web development, we found that the Permission. FOLLOW variable can be used globally. However, I am trying to confirm that the variable is not defined. After searching, the answer is found. In the Flask framework, there are two methods to register variables to the g

The 80386 control registers and the system address registers are shown in the following table. They are used to control the working mode, control the subsection management mechanism and implement the paging management mechanism. ControlRegister CRx BIT31 Bit30-bit12 Bit11-bit5 BIT4 BIT3 BIT2 BIT1 BIT0 CR0 Pg 0000000000000000 Et Ts

8.ARM Register Detailed explanationSimple classification of ARM registers: Figure 1-1:Figure 1-1There are 37 32-bit registers in the arm microprocessor, including 31 universal registers and 6 status registers. However, these registers cannot be accessed at the same time, and

Principle: 1. The first user browses a page. 2. The server program reads the number of pages viewed from the database or file. 3. Add the number of times to a store and send it back to the first user. 4. The second user browses a page. 5. The server program reads the number of pages viewed from the database or file. 6. Add the number of times to another store and send it back to the second user. Functions that need to be understood: fopen () Open File FileSize () Get File size Fseek () Move file

EBP and ESP are 32-bit sp,bp. ESP is the stack pointer EBP is the base address pointer ESP's relationship with the SP is like the ax-al,ah relationship. The registers contained in the 32-bit CPU are: 4 Data registers (EAX, EBX, ECX, and edx) 2 variable address and pointer registers (ESI and EDI) 2 pointer registers (

Functions of General registers In short, segment registers (ES, Cs, SS, DS, FS, GS) and address change registers (Si, DI) are used together to access segment data, the pointer register (BP, SP) is used to operate the stack. BP points to the base address of the stack, and SP always points to the top of the stack. In addition, the command pointer EIP stores the

What the Register is:Registers, which are very important storage units in integrated circuits, are usually made up of triggers.+++++++++++++++++++++++++++++++++++++++++++++++++++Classification of registers:Registers can be divided into the registers used inside the circuit and the registers that act as internal and external interfaces .Internal registers cannot b

Four data registers (eax, EBX, ECx, and EDX)2 address changes and pointer registers (ESI and EDI) 2 pointer registers (ESP and EBP)Six segment registers (ES, Cs, SS, DS, FS, and GS)1 Instruction Pointer register (EIP) 1 flag register (eflags) 1. Data RegisterData registers a

instruction, it jumps to the appropriate exception interrupt handler to execute. When the exception interrupt handler finishes executing, the program returns to the next point where the interrupt instruction occurredThe order is executed . When the exception interrupt handler is entered, the execution site of the interrupted program is saved, and the execution scene of the interrupted program is resumed when exiting from the exception interrupt handler.There are 37

First, the General registerFor a assembler programmer, the main part of the CPU is the register. Registers are parts of the CPU that programmers can read and write with instructions. Programmers can control the CPU by changing the contents of various registers.Different CPUs, the number of registers, the structure is different. 8086CPU has 14 registers with a nam

VIM series: registers and copy and paste buffers can now use most of VIM's basic commands and functions to develop project code. However, during project development, we still feel that some operations are relatively inefficient. For example, we use h/j/k/l to move the cursor in a wide range. Obviously, VIM provides a more efficient command operation method. Recently, it is often necessary to copy, paste, search, and replace codes. Common d/y/x/p comma

You can now use most of Vim's basic commands, function to develop project code, but in the development process of the project, still feel some operation efficiency is low, for example through h/j/k/l to carry on the large-scale movement of the cursor this kind of operation, obviously vim provides more efficient command operation way. The most recent work that needs to be done is to copy, paste, search and replace the code back and forth, the commonly used d/y/x/p command is not enough, so I lear

Functions of EAX, ECX, EDX, and EBX registers, ecxebx General registers: AX, BX, CX, DXAX: cumulative latches, BX: Base latches, CX: Count latches, DX: Data latchesIndex latches: SI and DISI: source index storage, DI: Destination index StorageStack and base latches: SP and BPSP: stacked indicator latches, BP: Base Indicator latchesEAX, ECX, EDX, and EBX: extensions of ax, bx, cx, and dx, each of which is 32