The arm instruction set provides two instructions to directly control the status register (psr,program State Register). The Mrs Instruction is used to transmit the value of the CPSR or SPSR to a register; In contrast, the MSR transmits the contents of a register to CPSR or SPSR. These two instructions are combined to read/write to CPSR and SPSR.Cpsr_c represents
SSE instruction set
The SSE (streaming SIMD extensions, single-instruction multi-data stream extension) Instruction Set was first launched by intel in the Pentium III processor. In fact, before piII was officially launched, Intel once published the so-called kni (Katmai new
Thumb Instruction Set
The thumb command can be seen as a subset of arm commands in the form of compression. It is proposed for the code density [1] and has a 16-bit code density. Thumb is not a complete architecture and cannot expect the processing program to execute only thumb instructions rather than arm instruction sets. Therefore, the thumb command only need
Some manuals are listed in http://blog.csdn.net/gengshenghong/article/details/7008682, where the Intel intrinsic Guide can query all intrinsic functions, Corresponding assembly instructions and how to use, etc., so, the next is not all analysis, the following only part of the analysis, so as to understand how to use these advanced instruction set in C + + code basic methods, as for more instructions to use,
All intrinsic functions, corresponding Assembly commands, and how to use these functions can be queried in the intrinsic guide. Therefore, we will not analyze them all in the following sections, to learn how to use these advanced instruction sets in C/C ++ code, the query manual is easy to understand as to how to use more commands.
Note: The commands used below may only involve SSE instruction sets, rather
0. ARM Registers
R13:sp
R14:LR 1. Jump Instructions
Jump instruction is used to implement the program flow jump, in the ARM program there are two ways to achieve the program flow jump:1) Use specialized jump commands.2) write the jump address value directly to the program counter PC.
By writing the jump address value to the program counter PC, you can achieve any jump in the 4GB address space, and use it together before jumping
MOV lr,pc
such as inst
CPU as the core of a computer, its role is irreplaceable. And the CPU itself is only on the block silicon chip on the integration of ultra-large-scale integrated circuits, the number of integrated transistors can reach hundreds of millions, is a very advanced complex manufacturing process, with a fairly high technology content.CPU instruction Set-conceptThe CPU relies on instructions to calculate and contro
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
I. Summary In peacetime project development, may use the third party to provide the static library. A, if the. A provider technology is immature, problems can arise when using it, such as: Compile error on the real machine: No architectures to compile for (Only_active_arch=yes, ACTIVE arch=x86_64, valid_archs=i386). Compile error on Simulator: No architectures to compile for (Only_active_arch=yes, ACTIVE arch=armv7s, Valid_archs=armv7 armv6). To solve these problems, you need to know some detail
, EDX, EBX, ESP, EBP, ESI, and EDI to the stack in sequence.
Pushf 16-bit mark into the stack command
Pushfd 32-bit mark into the stack command
RCL shifts the left of the bitwise loop.
Right Shift of RCR bit-in cycle
RET subroutine return instruction
Rol loop shifts left
Ror loop shifts right
Send the sahf mark register and load the ah content into the mark register.
Sal arithmetic left shift (= SHL)
SAR arithmetic shift right
SBB with borrow subtract
The Java Virtual Machine directive consists of a byte length, an opcode (Opcode) that represents a particular meaning, and the following 0 to many operands representing this action parameter. Many of the instructions in the virtual machine do not contain operands, only one opcode. If you ignore exceptions, the JVM interpreter can work effectively with the code.
Copy Code code as follows:
do{
Automatically compute the PC register and remove the opcode from the PC register locati
The so-called instruction set, is the CPU used to calculate and control the computer system of a set of instructions, and each new type of CPU in the design of a series of other hardware circuits with a set of instruction system. and the
Apple mobile device processor instruction set ARMV6, ARMV7, armv7s, and arm642014-09-15 09:35 Edit: suiling Category: iOS development Source: Cocoachina 05756ARM Mobile processor instruction set (via Ya Xiang Small build)The ARM processor, known for its low power consumption and small size, is based on arm for almost a
(Via Ya Xiang Xiao Zhu)The 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 compatible, such as Iphone4s's C
Reprinted from Http://www.jianshu.com/p/4a70aa03a4ea?utm_campaign=hugoutm_medium=reader_shareutm_content=note utm_source=qqThe question of the arm instruction set, the static library running problem, looked over a lot of information, organized as follows:1:blog.csdn.net/lizhongfu2013/article/details/42387311The following links are forwarded from the above link: iOS development ~ Making a static library that
I will upload my new book, "Write My Own processor" (not yet published), today is the third article. I try four articles a week.MIPS instruction set architecture since the advent of the 80 's. has been upgrading, from the initial MIPS I to MIPS V, to support the expansion module MIPS32, MIPS64 series, and integrated code compression technology microMIPS32, microMIPS64. Each MIPS Isa is a superset of its pre
Reprint: http://blog.sina.com.cn/s/blog_7e4015380100tt9j.htmlThe following contains all the directives that can be used in Eclim and provides a brief reference usage.Full Region instruction Set ¶:P Ingeclim-Connect the ECLIMD server.: Shutdowneclim-Close the ECLIMD server.: eclimsettings-Browse/Edit region-wide setting options.Project Project Instruction
Five cycles of a RISC instruction setRISC (Reduced instruction set computer, compact instruction set computer) is abbreviated as a thin instruction set. RISC places the effort of execut
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