, the system must respond faster, if the duration of processing is short, it is set to FIQ. Otherwise, IRQ is set.
If the interrupt is set to IRQ, when the interrupt occurs, the interrupt processor tells arm through the IRQ request line that an IRQ interrupt occurs and the arm switches to IRQ mode to run. Similarly, if the interrupt is set to FIQ, when the interrupt occurs, the interrupt processor informs the arm through the FIQ request line, and the arm knows that there is a FIQ interrupt, the
The amd64 takes the traditional x86 and expands the registers to 64 bits, naming them rax, RBx, etc. It also adds eight more general purpose registers, named simply R8 through R15.
The first four parameters to a function are passed in rcX, RDX, R8 and r9. any further parameters are pushed on the stack. furthermore, space for the Register parameters is reserved on the stack, in case the called function wants to spill them; this is importantIf the function is variadic.
Parameters that are small
to copy the compiled u-boot.bin to the qemu/mini2440 folder, otherwise the subsequent execution of mini2440/mini2440_start.sh will encounter the following error:
Copy code
Qemu mini2440_reset: loaded default U-boot from nandqemuMini2440_reset: loaded mini2440/uimage (size 1f7000)Qemu: Fatal: trying to execute code outside Ram or ROM at 0x34000000R00 = 00000000 R01 = 00000000 r02 = 00000000 r03 = 20.20.r04 = 00000000 r05 = 00000000 r06 = 00000000 r07 = 00000000r08 = 00000000 R
; C:/windows; C:/Windows/system32/WBEM; C: /program files/Microsoft SQL Server/80/tools/binn; C:/program files/ultraedit; C:/program files/cvsnt; C:/MATLAB R11/bin;Username = AdministratorOS = windows_ntProcessor_identifier = x86 family 6 model 11 stepping 1, genuineintel
--------------- S y s t e m ---------------
OS: Windows Server 2003 family build 3790
CPU: Total 1 family 6, cmov, cx8, fxsr, MMX, SSE
Memory: 4 K page, physical 522740 K (134696 K f
position of the task stack** OPT: additional parameter. The current version is useless for this function. For more information, see the OPT parameter of ostaskcreateext ().** Output: Stack top pointer position** Global variables:** Call module:**************************************** **************************************** ************************/
OS _stk * ostaskstkinit (void (* task) (void * PD), void * pdata, OS _stk * ptos, int16u OPT){OS _stk * STK;
Opt = OPT;/* 'opt' is not used. The fu
'elf _ common_init ':./Linux/include/ASM/elf. h: 166: Error: structure has no member named 'r8'./Linux/include/ASM/elf. h: 166: Error: structure has no member named 'r9'./Linux/include/ASM/elf. h: 166: Error: structure has no member named 'r10'./Linux/include/ASM/elf. h: 166: Error: structure has no member named 'r11'./Linux/include/ASM/elf. h: 167: Error: structure has no member named 'r12'./Linux/include/ASM/elf. h: 167: Error: structure has no mem
){ return x The above code is very concise. Let's take a look at the Code Compiled by GCC-O3. The default-O Option Code will not be listed. You can try the following by yourself:
. Compare2 :. lfb40: XOR, 4 // R3 = x, r4 = ycmpw, 3, 4 srawi 11, 0, 31 // R0 arithmetic right shift 31-bit Li 9,-1xor, 0 subf 3, 3, 11 // This command means R3 = R11-r3blt 7 ,. l15srwi 9, 3, 31 // R9 = R3 logic shifts 31 bits to the right. l15: extsw 3, 9blrI probably kn
Similarity between vectors
There are many ways to measure the similarity between vectors. You can use the reciprocal of distance (various distances), vector angle, Pearson correlation coefficient, and so on.
Pearson correlation coefficient calculation formula is as follows:
The numerator is the covariance, And the numerator is the product of the standard deviation of two variables. Obviously, the standard deviation of X and Y cannot be 0.
Because, the Pearson correlation coefficient calculatio
in the Assembly. The 16 registers have another naming method.
A1 ~ A4 corresponds to R0 ~ R3 serves as the input parameter of the function. R0 is the return value. V1 ~ V6 for the corresponding R4 ~ R9, used as a local variable. FP corresponds to R11 initialization frame pointer register IP corresponding to R12 internal process call register, SP corresponds to R13 Stack pointer. LR corresponds to R14, And the link register PC corresponds to R15 pro
, fpexc_en is not set every time a new process is switched to the CPU. In this case, a VFP command causes an "undefined command" interruption.Okay. The program runs to _ und_usr ()-> call_fpe ()-> do_vfp (). This process is actually very complicated. If you are interested, you can read the code carefully.Do_vfp:...LDR R4,. lcvfpLDR R11, [R10, # ti_cpu] @ CPU numberAdd R10, R10, # ti_vfpstate @ R10 = WorkspaceLdr pc, [R4] @ call VFP entry point.... Lcv
vectortable, they are placed in the ROM at the beginning, which requires them to be moved to the specified position when the system starts up, the following code is intended for this purpose.; Setup the vector area.;; (R8) = PTR to exception Vectors
Add R7, PC, # vectorinstructions-(. + 8)Ldmia R7 !, {R0-r3}; load 4 instructionsStmia R8 !, {R0-r3}; store the 4 vector instructionsLdmia R7 !, {R0-r3}; load 4 instructionsStmia R8 !, {R0-r3}; store the 4 vector instructions
; Convert vectortable to
First: Basic knowledge
(1) Register, use rules for parameter passing
A. In the subroutine, use the register R4 ~ R11 to save local variables.
B. Register R12 is used for Scratch registers between subprograms (used to save the SP and use this register to exit the register when the function returns) and is recorded as IP addresses.
C. Register R13 is used as the data stack pointer and recorded as sp. The SP value in the register must be the same as that
.
Info mtree
Shows the VM guest memory hierarchy.
Info trace-Events
Shows Available Trace-events and their status.
These functions can be run in vncviewer. However, sometimes the screen is too small and incomplete. You can use virsh to perform operations.
Virsh # listID name state----------------------------------------------------14 instance-00000009 running15-instance-0000000a running
Virsh # qemu-monitor-command 14 -- HMP "info KVM"KVM support: Enab
R14 and spsr, while IRQ mode does not have that much, R8, R9, R10, R11, the banked registers corresponding to R12 do not exist, which means that in IRQ mode of arm, the interrupt handler itself needs to save the R8 to R12 registers, then, when the program exits the interrupt processing, it needs to restore these registers. In FIQ mode, because these registers have the banked register, the CPU automatically saves these values to the banked register du
gyroscope, battery voltage detection, 4 led;4 for commissioning, a set of 4 p dial switch, active buzzer, two 6P with AB Encoder motor interface.I share out is the hardware + software matching, no exaggeration to say, directly to me this PCB sent to proofing back welding, program burn write in, adjust the parameters should be simple upright.Link settings0:r0:0x001:r1:0x012:r2:0x023:r3:0x034:r4:0x045:r5:0x056:r6:0x067:r7:0x078:r8:0x089:r9:0x0910:r10:0x0a11:r
In 1970s, Cleve Moler, head of the Computer Science Department at the University of New Mexico, used FORTRAN to compile the earliest MATLAB program. In 1984, MathWorks, jointly established by Little, Moler, and Steve Bangert, officially pushed MATLAB to the market.
Version Number
Build No.
Release Date
Math 7.9Math 7.8
R2009bR2009a
2009.92009.3
Math 7.7
R2008b
2008.10
Math 7.6
R2008a
2008.3
Math 7.5
R2007b
2007.10
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