:''This article is about the category of computer programming tools''.'' See Assembler (disambiguation) for other meanings''. ---- An assembler is a computer program for translating assembly language — essentially, a mnemonic representation of machine language — into object code. A cross assembler (see cross compiler) produces code for one type of processor, but runs on another. As well as translating assembly instruction mnemonics into opcodes, assemblers provide the ability to use symbolic names for memory locations (saving tedious calculations and manually updating addresses when a program is slightly modified), and macro facilities for performing textual substitution — typically used to encode common short sequences of instructions to run inline instead of in a subroutine. Assemblers are far simpler to write than compilers for high-level languages, and have been available since the 1950s. Modern assemblers, especially for RISC based architectures, such as MIPS architecture, Sun SPARC and HP PA-RISC, optimize instruction scheduling to exploit the CPU pipeline efficiently. High-level assemblers provide high-level-language abstractions such as advanced control structures, high-level procedure/function declarations and invocations, and high-level abstract data types including structures/records, unions, classes, and sets. Hundreds of assemblers have been written; some notable examples include: * [http://plit.de/asem-51/ ASEM-51] - for the [http://developer.intel.com/design/mcs51/ Intel MCS-51] family of microcontrollers * A56 - for Motorola DSP56000 Digital Signal Processors (DSP56k series) * ASCENT - ASsembler for CENTral Processor Unit of Control Data Corporation computer systems before COMPASS * ASPER - ASsembler for PERipheral Processor Units of Control Data Corporation computer systems before COMPASS * COMPASS (COMPrehensive ASSembler) - a macro assembler for Control Data Corporation CDC 3000 series minicomputers, CDC 6400/CDC 6500/CDC 6600, CDC 7600 and CDC Cyber series supercomputer systems * [http://www.emu8086.com Emu8086] - x86 assembly language and Intel's 8086 microprocessor emulator. * FAP - for IBM 700/7000 series#Scientific Architecture mainframes * FASM - open source IA-32 assembler * GAS (GNU Assembler) - open source, available for many architectures * HLA (High Level Assembler) - A public domain high-level assembler for x86- see High Level Assembler * HLASM (High Level Assembler) - for mainframe computer * MACRO-11 - for Digital Equipment Corporation PDP-11 * MACRO-32 - for Digital Equipment Corporation VAX * MASM (Macro/MS Assembler) - x86 assembly language from Microsoft * NASM (Netwide Assembler) - open source x86 assembler * PAL-III - for DEC PDP-8 * TASM (Turbo Assembler) - x86 assembler from Borland * RosASM - 32 bit Assembler (The Bottom Up Assembler which is free and GPLed) * MI - "Machine Interface," the closest thing the AS/400 has to an assembler, which includes many features normally found only in high-level languages, and is actually the assembler language for a virtual machine. * A chart of x86 assemblers that attempts to be fairly complete and shows general lineage is at http://retroforth.org/asmchart/ On Unix systems, the assembler is traditionally called as (Unix), although it is not a single body of code, being typically written anew for each port. A number of Unix variants use GAS. It is important to note that each assembler has its own dialect within processor groups. Sometimes, some assemblers can read other assembler's dialect, for example, TASM can read old MASM code, but not the reverse. FASM and NASM have similar syntax, but each support different macros that could make them difficult to translate to each other. The basics are all the same, but the advanced features will differ. Also, assembly can sometimes be portable across different operating systems on the same type of CPU. Calling conventions between operating systems often differ slightly to none at all, and with care it is possible to gain some portability in assembler language, usually by linking with a C library that does not change between operating systems. However, it is not possible to link portably with C libraries that require the caller to use preprocessor macros that may change between operating systems. For example, many things in libc depend on the preprocessor to do OS-specific, C-specific things to the program before compiling. In fact, some functions and symbols are not even guaranteed to exist outside of the preprocessor. Worse, the size and field order of structs, as well as the size of certain typedefs such as off_t, are entirely unavailable in assembler language, and ''do'' differ even between versions of Linux, making it impossible to portably call functions in libc other than ones that only take simple integers/pointers as parameters. Many people use an emulator to debug assembly-language programs. ==Related wikis== * [http://www.program-transformation.org/ The Program Transformation Wiki] * [http://c2.com/cgi/wiki?LearningAssemblyLanguage C2: Learning Assembly Language] ==External links== * [http://www.gnu.org/software/lightning/lightning.html GNU lightning is a library that generates assembly language code at run-time ... ideal for Just-In-Time compilers] * [http://linuxassembly.org/ "information on assembly programming under different platforms: IA32 (x86), IA64 (Itanium), x86-64, SPARC, Alpha, or whatever platform we find contributors for."] * [http://flatassembler.net/ Flat Assembler] * [http://terse.com/ "Terse: Algebraic Assembly Language for x86"] Assemblers Computing
everyone who want to become a computer engineer or programmer should learn assembler before JAVA or VB! Yum Images assemblers exist too. They are used to put together two ore more images (like photographs), yielding a flat result or a spherical result. Spherical (or to a less extent cylindrical) results can be viewed using an appropriated viewer like Apple QuickTime or Helmut Dersch's PTviewer. To see some fine examples, you should go to www.panoramas.dk == as , the unix command line assembler == shouldnt this assembler be included ? im not an expert and i never used as , but it is written i wikipedia in the disambiguation page of as!
See other meanings of words starting from letter:
Words begining with Assembler:
Assembler
Assembler
Assemblers
Assemblers
Assembler_(disambiguation)
Assembler_(nanotechnology)
Assembler_code
Assembler_code_example_of_parity_calculation
Assembler_code_example_of_parity_calculation
Assembler_language
Assembler_program
Assembler_programming
Assembler
:''This article is about the category of computer programming tools''.'' See Assembler (disambiguation) for other meanings''. ---- An assembler is a computer program for translating assembly language — essentially, a mnemonic representation of machine language — into object code. A cross assembler (see cross compiler) produces code for one type of processor, but runs on another. As well as translating assembly instruction mnemonics into opcodes, assemblers provide the ability to use symbolic names for memory locations (saving tedious calculations and manually updating addresses when a program is slightly modified), and macro facilities for performing textual substitution — typically used to encode common short sequences of instructions to run inline instead of in a subroutine. Assemblers are far simpler to write than compilers for high-level languages, and have been available since the 1950s. Modern assemblers, especially for RISC based architectures, such as MIPS architecture, Sun SPARC and HP PA-RISC, optimize instruction scheduling to exploit the CPU pipeline efficiently. High-level assemblers provide high-level-language abstractions such as advanced control structures, high-level procedure/function declarations and invocations, and high-level abstract data types including structures/records, unions, classes, and sets. Hundreds of assemblers have been written; some notable examples include: * [http://plit.de/asem-51/ ASEM-51] - for the [http://developer.intel.com/design/mcs51/ Intel MCS-51] family of microcontrollers * A56 - for Motorola DSP56000 Digital Signal Processors (DSP56k series) * ASCENT - ASsembler for CENTral Processor Unit of Control Data Corporation computer systems before COMPASS * ASPER - ASsembler for PERipheral Processor Units of Control Data Corporation computer systems before COMPASS * COMPASS (COMPrehensive ASSembler) - a macro assembler for Control Data Corporation CDC 3000 series minicomputers, CDC 6400/CDC 6500/CDC 6600, CDC 7600 and CDC Cyber series supercomputer systems * [http://www.emu8086.com Emu8086] - x86 assembly language and Intel's 8086 microprocessor emulator. * FAP - for IBM 700/7000 series#Scientific Architecture mainframes * FASM - open source IA-32 assembler * GAS (GNU Assembler) - open source, available for many architectures * HLA (High Level Assembler) - A public domain high-level assembler for x86- see High Level Assembler * HLASM (High Level Assembler) - for mainframe computer * MACRO-11 - for Digital Equipment Corporation PDP-11 * MACRO-32 - for Digital Equipment Corporation VAX * MASM (Macro/MS Assembler) - x86 assembly language from Microsoft * NASM (Netwide Assembler) - open source x86 assembler * PAL-III - for DEC PDP-8 * TASM (Turbo Assembler) - x86 assembler from Borland * RosASM - 32 bit Assembler (The Bottom Up Assembler which is free and GPLed) * MI - "Machine Interface," the closest thing the AS/400 has to an assembler, which includes many features normally found only in high-level languages, and is actually the assembler language for a virtual machine. * A chart of x86 assemblers that attempts to be fairly complete and shows general lineage is at http://retroforth.org/asmchart/ On Unix systems, the assembler is traditionally called as (Unix), although it is not a single body of code, being typically written anew for each port. A number of Unix variants use GAS. It is important to note that each assembler has its own dialect within processor groups. Sometimes, some assemblers can read other assembler's dialect, for example, TASM can read old MASM code, but not the reverse. FASM and NASM have similar syntax, but each support different macros that could make them difficult to translate to each other. The basics are all the same, but the advanced features will differ. Also, assembly can sometimes be portable across different operating systems on the same type of CPU. Calling conventions between operating systems often differ slightly to none at all, and with care it is possible to gain some portability in assembler language, usually by linking with a C library that does not change between operating systems. However, it is not possible to link portably with C libraries that require the caller to use preprocessor macros that may change between operating systems. For example, many things in libc depend on the preprocessor to do OS-specific, C-specific things to the program before compiling. In fact, some functions and symbols are not even guaranteed to exist outside of the preprocessor. Worse, the size and field order of structs, as well as the size of certain typedefs such as off_t, are entirely unavailable in assembler language, and ''do'' differ even between versions of Linux, making it impossible to portably call functions in libc other than ones that only take simple integers/pointers as parameters. Many people use an emulator to debug assembly-language programs. ==Related wikis== * [http://www.program-transformation.org/ The Program Transformation Wiki] * [http://c2.com/cgi/wiki?LearningAssemblyLanguage C2: Learning Assembly Language] ==External links== * [http://www.gnu.org/software/lightning/lightning.html GNU lightning is a library that generates assembly language code at run-time ... ideal for Just-In-Time compilers] * [http://linuxassembly.org/ "information on assembly programming under different platforms: IA32 (x86), IA64 (Itanium), x86-64, SPARC, Alpha, or whatever platform we find contributors for."] * [http://flatassembler.net/ Flat Assembler] * [http://terse.com/ "Terse: Algebraic Assembly Language for x86"] Assemblers Computing
Assembler
everyone who want to become a computer engineer or programmer should learn assembler before JAVA or VB! Yum Images assemblers exist too. They are used to put together two ore more images (like photographs), yielding a flat result or a spherical result. Spherical (or to a less extent cylindrical) results can be viewed using an appropriated viewer like Apple QuickTime or Helmut Dersch's PTviewer. To see some fine examples, you should go to www.panoramas.dk == as , the unix command line assembler == shouldnt this assembler be included ? im not an expert and i never used as , but it is written i wikipedia in the disambiguation page of as!
See other meanings of words starting from letter:
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AB | AC | AD | AE | AF | AG | AH | AI | AJ | AK | AL | AM | AN | AO | AP | AR | AS | AT | AU | AW | AX | AY | AZ |Words begining with Assembler:
Assembler
Assembler
Assemblers
Assemblers
Assembler_(disambiguation)
Assembler_(nanotechnology)
Assembler_code
Assembler_code_example_of_parity_calculation
Assembler_code_example_of_parity_calculation
Assembler_language
Assembler_program
Assembler_programming
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