as LR, to the return address of the function.???? 4. Program Counter:Register R15 is used as a program counter, also known as a PC. The value is equal to the address +8 of the currently executing instruction (because there is a more decoding phase between the fetch and the execution). The PC always points to the post two instruction address that is running, which is the address +8 of the current execution instruction.???? 5. Status Register:Figure 1-
, right-click, and select resolve, The conflict mark is eliminated before it can be submitted again, otherwise it cannot be submitted.
File tag conflict format:
WorkspsaceWorkspace, etc. ABCAfter the workspace is submitted, a conflict may occur.
========
Insert a paragraph here, Ah aaa, Test conflict
>>>>>>>. R15
The green part indicates the modification of the local file.
The blue part indicates the conflict between the latest version in the server
cannot be submitted. Because the version library of the server has been updated by Deva, when the DEVB user uploads the file, the system will prompt error 10. In this case, DEVB users must first perform updata operations on the modified file. If two users modify the same location of the file soc_2, after the DEVB user executes updata, the system will merge the local soc_2 and the downloaded soc_2 from the server to a file, the file icon is marked with a yellow exclamation mark, indicating a fil
interrupt request): When the processor's fast interrupt request pin is valid and the F bit in CPSR is 0, a FIQ exception is generated (exception vector: 0x0000,001 C ).Note: The exception Vector 0x0000,001 4 is the reserved exception vector.
12. Memory Format of the-ARM architecture in armA: The Memory Format of the ARM architecture is as follows:Large-end format: the high bytes of word data are stored in the low address, and the low bytes of word data are stored in the high address;Small-end f
program code is copied to Rom, it will continue to run directly in Ram:
/* If the code is copied and no response is returned, call in_ram to execute */addir0, R10, in_ram-_ start + exc_off_sys_resetmtlrr0blr.globlrelocate_coderelocate_code: mrr1, r3/* Create a New stack pointer */mrr9, R4/* Backup */mrr10, r5mrr3, R5/* R3: copy end point */lisr4, performance_monitor_base @ H/* R4: Copy start point */orir4, R4, performance_monitor_base @ llwzr5, got (_ init_end) subr5, R5, R4/* R5: copy length *
vector: 0x0000,001 C ).Note: The exception Vector 0x0000,001 4 is the reserved exception vector.
12. Memory Format of ARM architectureA: The Memory Format of the ARM architecture is as follows:Large-end format: the high bytes of word data are stored in the low address, and the low bytes of word data are stored in the high address;Small-end format: In contrast to the large-end storage format, the high-address stores the high bytes of data, and the low-address stores the low bytes of data.
13. Ar
Difference between von norann Implementation Harvard Implementation of ARM
Von norann implementation: data items and instructions share the same bus.
Harvard implementations: It uses two different buses.
Load-store architecture:
Load: Memory ----- (load instructions copy data) -------> registers in Core
Store: registers ---- (store instructions copy data) ------> memory
There are no data processing instructions that directly manipulate data in memory.
Register:
There are 18 active registers
searched the internet and found no ide supporting asm64, or even no editor. Therefore, the simplest method is to modify the MASM syntax file of editplus on your own. This is also the method I used, at least to obtain syntax highlighting. Of course, if you are too lazy to do it, use notepad.Without IDE, You need to manually enter a lot of parameters and options for each compilation, just do a batch.
1.3 hardware and Operating SystemThe hardware requirement is a 64-bit CPU. The operating system m
Features:Load/Store Structure (memory operations only include load and store, and all other operations are completed in registers)32-Bit fixed instruction width3. Address Instruction format (both source operands and result registers are specified independently)Each Command is executed in a condition.A normal operation and a normal ALU operation can be completed simultaneously in a single instruction executed in a single cycle.
Automatic address change
Register ModelIn User Mode15 32-bit universa
registers
ARM has a total of 37 registers, can work in 7 different modes. The following descriptions are categorized according to the above figure: the R0-R7 registers are shared for all modes, with a total of 8. R8-r12 in the packet register, the fast interrupt mode has its own set of registers, and other modes are shared, so there are 10. R13,r14 in the packet register, in addition to user mode and system mode sharing, other modes of each group, so there are 2*7-2 = 12.
identify instructions to be executed
⑶ executes the processing instruction and writes the result to the Register
Previously learned 51 microcontroller, because it is relatively simple, so its processor can only complete one instruction read and execute, will execute the next instruction. This way, the PC always points to an instruction that is "executing".
For ARM7, because it is a 3-level pipeline, the processing of the instructions is divided into 3 stages described above.
So the process is a
registers cannot be accessed concurrently, and the processor state and operating mode determine which registers are available to the programmer.
L Non-grouped universal register R0-R7
R0--R7 in 16 data registers are non-grouped universal registers that are used to hold data and addresses .
L Packet General register R8-R15, processor mode determines physical register
--r8-r12 Register: Fast Interrupt and other mode two groups;
--r13,r14 Register: Div
Today found a system InnoDB spin rounds per wait is negative, it feels strange, it turns out to be a bug: forExample (output fromPS But we had no patches here),----------semaphores----------OS WAIT ARRAY info:reservationCount 19811539060OS WAIT ARRAY info:signalCount 8333711487Mutex Spin Waits192857078576, Rounds290389036704, OS waits1568180069RW-Shared spins19747848205, Rounds565755834160, OS waits14799492482RW-Excl Spins7774140570, Rounds144578121130, OS waits3188338144Spin rounds per wait:-69
think that the gameplay of a game is the most important, and the picture is less important than the operation.
Ubuntu Installation
Open the terminal:
1. (See) sudo apt-add-repository ppa: littel-jo/frogatto
Www_linuxidc_com @ linuxidc-Aspire-3680 :~ $ Sudo apt-add-repository ppa: littel-jo/frogatto[Sudo] password for www_linuxidc_com:Executing: gpg -- ignore-time-conflict -- no-options -- no-default-keyring -- secret-keyring/etc/apt/secring. gpg
, so you need to have a general goal and plan, reasonable arrangement of time.1.1 Your goal is to be proficient in mathematics, to study mathematics, to earn a living in mathematics, you may aspire to master algebraic geometry, or to be proficient in frontier physics. Then you need to lay a solid foundation of modern algebra, geometry, and analysis, and you need to prepare a lot of time and energy, with unwavering determination. (Requirements: Profici
Have you ever met the classic interview question, "Have you foreseen your position in 5 years?" ”。 Every time someone asks, I think of an album that Twisted Sister the band has been releasing since 1984. Of course it's rock and roll, and it's a rock-and-roll-star programmer. This question is usually not answered in a positive way-like the moan cliché of the interview, "What's your biggest drawback?" ”。 Does it sometimes get too steep? That innocent bystanders would be harmed. However, I think th
Ignite ignite ignition
One person ignited at night --- Ignore ignored
A nore ignores Ignorant ignorance iggnorance n ignorance
Annoy troubles
Ah no Be annoyed with Sb disturbing someone
Hum Soil
Human Humid humid humidity n humidity
Humble modest and humble
Tumble falls
You are greedy when walking, so you fall Stumble falls
Gamble gambling
Cadres love gambling Inspire inspiration
Inspiration inspiration
Expire,
God takes your breath Go west to West
Expiration
When the simulated device Android 4.2.2 is started in Ubuntu 14.04, the following error occurs:
failed to load libgl.so
First use the locate command to locate the libGL library, and then add a link:
dean@dean-Aspire-V7-481G:~$ locate libGL/opt/android-sdk-linux/tools/lib/libGLES_CM_translator.so/opt/android-sdk-linux/tools/lib/libGLES_V2_translator.so/usr/lib/i386-linux-gnu/mesa/libGL.so.1/usr/lib/i386-linux-gnu/mesa/libGL.so.1.2.0/usr/lib/x86_64-l
Acer's 13-inch Swift 7 is the lightest, thinnest and most portable ultra-extreme in the market, coupled with a fan-less design, so it doesn't have much noise to run. At the same time, the Swift 7 design is also very stylish, and keyboard feel is also I experienced in all the superb level of the super, and the large touch pad is also very comfortable to use.
But that does not mean Swift 7 is perfect, and of course there are drawbacks.
First, Swift 7 is priced at $1050 (about 7090 yuan), althou
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