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| | Floating point unit - Wikipedia, the free encyclopedia |
 | | In the absence of an FPU, the CPU may use a microcode program to emulate an FPUs function using an arithmetic and logical unit (ALU), which saves the added hardware cost of an FPU but is significantly slower. | | | Until the mid 1990s, it was common for the FPU to be entirely separate from the CPU in home computers and for it to be an optional item. | | | Examples include the 387 and 487 FPUs, for use with 386 and 486SX CPUs respectively, and the 68881 FPU, used with the 680x0 line, commonly found in Macintosh computers. |
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http://en.wikipedia.org/wiki/FPU
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| | Floating Point Unit |
| | DownGradePrecision Code by Kevin Rhoads to allow precision to be deliberately thrown away in an IEEE floating point compliant computing environment in order to more closely model computations in less precise floating point systems. | | | Floating Point Computer Services Focused technology company working for small businesses. | | | Assembly Language Floating Point Simple input and output in assembly language for floating point and integer double word sized values. |
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http://www.serebella.com/encyclopedia/article-Floating_Point_Unit.html
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| | Art of Assembly: Chapter Fourteen |
| | When Intel planned to introduce a floating point coprocessor for their new 8086 microprocessor, they were smart enough to realize that the electrical engineers and solid-state physicists who design chips were, perhaps, not the best people to do the necessary numerical analysis to pick the best possible binary representation for a floating point format. | | | However, on processors eariler than the 80486 (or on the 80486sx), the floating point processor is an optional device; it this device is not present you must simulate it in software. | | | However, if you compute a value which is the result of a sequence of floating point operations, the error can accumulate and greatly affect the computation itself. |
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http://webster.cs.ucr.edu/AoA/DOS/ch14/CH14-1.html
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| | Central processing unit - Encyclopedia.WorldSearch |
| | The central processing unit (CPU) is the part of a computer that interprets and carries out the instructions contained in the software. | | | Manufacturers of desktop computers often erroneously describe the entire personal computer (the system unit or sometimes white box, including the computer case and the computer hardware it contains) as the CPU. | | | Rather, the CPU, as a functional unit, consists of that part of the computer which actually executes the instructions (add, subtract, shift, fetch, etc.). |
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http://encyclopedia.worldsearch.com/central_processing_unit.htm
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| | Embedded Pentium® Processor Family Technical Information Center - Floating-Point Unit |
| | The first Intel Math Coprocessors (the Intel 8087, Intel 287, and Intel 387) were companion processors to the Intel 8086/8088, Intel 286, and Intel386 processors, respectively, and were designed to improve and extend the numeric processing capability of the Intel Architecture. | | | The FPU can operate on and/or return any of these values, depending on the type of computation being performed. | | | Each generation of the Intel Architecture FPUs have been explicitly designed to deliver stable, accurate results when programmed using straightforward "pencil and paper" algorithms, bringing the functionality and power of accurate numeric computation into the hands of the general user. |
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http://www.engr.udayton.edu/faculty/jloomis/ece314/notes/fpu/fpu.html
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| | FPU - a Whatis.com definition - see also: floating point unit, floating-point unit |
| | An floating point unit (FPU), also known as a numeric coprocessor, is a microprocessor or special circuitry in a more general microprocessor that manipulates numbers more quickly than the basic microprocessor your computer uses. | | | Personal computers that don't have floating point units can sometimes handle software that requires them by installing a floating point emulator. | | | Some software you might download from the World Wide Web, such as Macromedia's Shockwave, may require that your computer have a floating point unit. |
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http://whatis.techtarget.com/definition/0,289893,sid9_gci213965,00.html
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| | The S/390 G5 floating-point unit |
| | Both the execution unit (E-unit) and the instruction unit (I-unit) are duplicated on chip and execute on the same instruction stream, and the results are compared by the recovery unit and L1 cache unit. | | | Since the FXU and FPU cannot execute in parallel, the FXU is used for the starting of floating-point instructions to access data from the register files and align storage data for the FPU. | | | The key feature of the G5 FPU is its ability to implement both the hexadecimal and binary floating-point formats on one FPU. |
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http://www.research.ibm.com/journal/rd/435/schwarz.html
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| | Floating Point : Java Glossary |
| | By floating point I refer generically to the code written to use the primitives double and float and the wrapper classes Double and Float. | | | The computer floating point unit works internally in base 2, binary. | | | This is all very well, but from the point of view of humans, the display looks wrong, as if result were slightly inexact and with way too many digits. |
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http://mindprod.com/jgloss/floatingpoint.html
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| | The IBM eServer z990 floating-point unit - Author Bios |
| | He is currently working in FPU design on binary instructions for the next IBM pSeries and zSeries processors. | | | Schwarz provides support to IBM floating-point unit teams and is on the program committee of the IEEE Symposium on Computer Arithmetic. | | | In particular, he was involved in the design of the floating-point unit of the z990 microprocessor. |
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http://www.research.ibm.com/journal/rd/483/gerwiaut.html
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| | IEEE 754 Floating-Point Division Unit |
| | With the preceding IEEE 754 specifications in mind the divider unit was designed using verilog, found in appendix A. The unit has three basic components to handle each of the three fields of the floating point data. | | | The interface of the floating point unit to the socks environment via the AMBA bus was also tested. | | | This unit also provided the optimization of rounding the result based on an input rounding mode. |
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http://www.iit.edu/~robewil1
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| | Spacecraft onboard computers from the Rapid-I and -II programs, applicability of FlightLinux |
| | The United Technologies UT1750AR is a RISC microprocessor that implements the 1750A instruction set through an emulation ROM. | | | However, the omission of the memory management unit forces the use of a flat memory model, and precludes one of the more powerful features of Unix:, memory mapping. | | | The NSSC-1 is a fixed point, 18-bit machine constructed with discrete logic components, and using core or plated wire memory. |
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http://flightlinux.gsfc.nasa.gov/docs/Target_Arch_Report.html
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| | Fractal eXtreme: x86 and Infinity |
| | Their non-standard format causes difficulty for many floating point units, and was the cause of much wrangling when IEEE 754 was being worked on. | | | Maybe the stack based architecture of the original floating point unit made further optimizations too difficult, or maybe Intel decided to devote their transistors to SSE2 instead, but for whatever reason, if you want reliably fast math on the Pentium 4, you need to think about SSE2. | | | A number that is a denormal in ‘double precision' is no longer a denormal once it's loaded into the 80-bit registers of an Intel compatible floating point unit (because the exponent range is increased), so denormals add just fine in many tests, but there is a substantial penalty for loading and saving them. |
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http://www.cygnus-software.com/papers/x86andinfinity.html
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| | Floating Point Unit Design |
| | All floating point instructions are some combination of FP add and FP multiply, often using the fmadd instruction. | | | Since the logic of the various pipeline stages was not discussed in great detail in any of the references used in coding the FPU, the FPU may need to be modified to reflect a greater knowledge and accuracy in the future. | | | The FPUnitPipeline serves as a shell for the computational components of the FPU, as well as creating instances of the FPUnitDecode, FPUnitMultiply, FPUnitAdd, and FPUnitAddWB classes. |
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http://www.cs.utexas.edu/users/chris/ppc/fpu_design.html
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| | Citations: A proposed radix- and word-lengthindependent standard for floating-point arithmetic - Cody, Coonen, Gay, ... |
| | The IEEE 754 standard is for binary floating point numbers and specifies bit level layout while IEEE 854 covers both binary and decimal floating point numbers but does not specify encodings for.... | | | Later, advances in microprocessor design have turned a low performance AEoating point external chip to a fully integrated high bandwidth AEoating point unit [13, 15] Some groups have developed multiple precision packages based on the error free integer arithmetic to compute some very precise.... | | | implemented also in the INMOS transputers Floating Point Unit (FPU) compare also [16] Thus, computed irregular values do not raise exceptions, but are propagated to the subsequent or higher level blocks, which must be able to handle them. |
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http://citeseer.ist.psu.edu/context/226152/0
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| | Floating Point |
| | The point is, there is never a leading 0 in scientific notation, and it makes no difference whether we're talking about binary or decimal or hexadecimal or whatever. | | | The method is to first convert it to binary scientific notation, and then use what we know about the representation of floating point numbers to show the 32 bits that will represent it. | | | The binary representation of the number beyond the decimal point can be read from the right column, from the top number downward. |
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http://www.duke.edu/~twf/cps104/floating.html
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| | SH Options - Using the GNU Compiler Collection (GCC) |
| | "call2" uses a different entry point of the same library function, where it assumes that a pointer to a lookup table has already been set up, which exposes the pointer load to cse / code hoisting optimizations. | | | This has a very high latency, but needs only a few instructions, so it might be a good choice if your code has enough easily exploitable ILP to allow the compiler to schedule the floating point instructions together with other instructions. | | | Dump instruction size and location in the assembly code. |
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http://gcc.gnu.org/onlinedocs/gcc/SH-Options.html
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| | Computer History Museum - Timeline |
| | A step up from the 68020, it built on a 32-bit enhanced microprocessor with a central processing unit core, a data cache, an instruction cache, an enhanced bus controller, and a memory management unit in a single VLSI device — all operating at speeds of at least 20 MHz. | | | In this photograph, J. Felker (left) gives instructions to the TRADIC computer by means of a plug-in unit while J. Harris places numbers into the machine by flipping simple switches. | | | What set the 486 apart was its optimized instruction set, with an on-chip unified instruction and data cache and an optional on-chip floating-point unit. |
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http://www.computerhistory.org/timeline/timeline.php?timeline_category=cmpnt
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| | EETimes.com - Floating point unit added to Coldfire with enhanced core |
| | And with high level languages that support FPUs, engineers can address those problems in ways that are affordable," Circello said. | | | The operand formats can be byte, word, or long-word integer, in either single or double precision, though all internal calculations are done in double-precision arithmetic. | | | "The availability of a floating point unit means that, as processors move above a certain performance point, suddenly design engineers can change how they view existing problems. |
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http://www.eetimes.com/story/OEG20001017S0041
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| | DFPMU: Floating Point Mathematics Unit |
| | DFPMU uses the specialized CORDIC and standard algorithms to compute math functions. | | | Direct replacement for C float software functions such as: +, -, *, /,==, !=, >=, <=, <, > | | | It supports addition, subtraction, multiplication, division, square root, comparison, absolute value, change sign of a number and trigonometric functions: sine, cosine, tangent and arctangent. |
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http://www.latticesemi.com/products/devtools/ip/dcd/dfpmu.cfm
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| | FPU |
| | Floating-point units are also called numeric coprocessors, math coprocessors, and floating-point processors. | | | Computers equipped with an FPU perform certain types of applications much faster than computers that lack one. | | | Short for floating-point unit, a specially designed chip that performs floating-point calculations. |
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http://www.pcmech.com/glossary/fpu.htm
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| | Floating Point Unit Generation and Evaluation for FPGAs (ResearchIndex) |
| | Given performance requirements, our generation tool automatically chooses the proper implementation algorithm and architecture to create a compliant... | | | 8 Field programmable gate arrays and floating point arithmetic (context) - Fagin, Renard - 1994 | | | 19 the Design of High Performance Digital Arithmetic Units (context) - Farmwald - 1981 |
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http://citeseer.ist.psu.edu/610816.html
(472 words)
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| | The S/390 G5 Floating Point Unit Supporting Hex and Binary Architectures (ResearchIndex) |
| | This floating point unit is part of the microprocessor chip on the S/390 G5 mainframe computer introduced... | | | Abstract: The first high performance floating point unit to support both IBM 360 hexadecimal based floating point architecture and the IEEE 754 Standard binary floating point architecture is described. | | | The S/390 G5 floating point unit supports the new S/390 architecture which includes hexadecimal based short, long, and extended precision formats and IEEE 754 standard single, double, and quad formats. |
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http://citeseer.ist.psu.edu/436650.html
(289 words)
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| | ASIC Design : Silicon Logic Engineering |
| | The Floating Point Multiply Unit is optimized to exclusively support the multiplication operation. | | | An additional exception flag is provided to signal when a Denormal input or what would have been a Denormal output is flushed to Zero. | | | The operation of this unit follows the IEEE 754 Standard for Floating Point Arithmetic for Single Precision (32-bit) arithmetic for multiplication with the exception that Denormals are treated as like-signed Zeros. |
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http://www.siliconlogic.com/fpmultiply.htm
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| | ASM 32bits book - The Floating Point Unit |
| | The x87 coprocessor, or the floating-point unit (FPU), executes approximately 70 instructions. | | | It includes the data transfer, arithmetic, comparison, transcendental, and constant instructions. | | | The FPU can be very useful for performing calculation and mathematics heavy applications such as 3D graphics and audio processing. |
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http://win32asmcommunity.net/phpwiki/index.php?pagename=TheFloatingPointUnit
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| | The IBM System/360 Model 91: Floating-Point Execution Unit |
| | The chosen solution was to develop separate, instruction-oriented algorithms for the add, multiply, and divide functions. | | | Related Subjects: Algorithms; Computer organization and design; IBM System/360, Model 91; Machine computation and data analysis | | | The principal requirement for the Model 91 floating-point execution unit was that it be designed to support the instruction-issuing rate of the processor. |
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http://domino.research.ibm.com/tchjr/journalindex.nsf/0/b639a6937774333e85256bfa00683f74?OpenDocument
(95 words)
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| | Floating-Point Unit - OneLook Dictionary Search |
| | Floating-Point Unit : Free On-line Dictionary of Computing [home, info] | | | floating-point unit : Dictionary of Computing and Digital Media [home, info] | | | Tip: Click on the first link on a line below to go directly to a page where "Floating-Point Unit" is defined. |
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http://onelook.com/cgi-bin/cgiwrap/bware/dofind.cgi?word=Floating-Point+Unit
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| | FPU - Floating Point Unit - Business Web Hosting Terms |
| | The FPU is specifically designed to handle floating-point math, so it computes expressions invloving real numbers more efficiently. | | | Floating point units used to be manufactured as individual chips, but they are now usually integrated into the CPU. | | | FPU - Floating Point Unit - Business Web Hosting Terms |
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http://www.bluefishhosting.com/glossary94.html
(154 words)
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| | Floating Point Unit - netlexikon |
| | Die FPU kann als externer Chip in einem eigenen Gehäuse sitzen (z. | | | Solch eine FPU arbeitet in der Regel als Koprozessor mit einer "normalen" CPU zusammen. | | | Mittels Software realisierte Gleitkomma Berechnung ist im Vergleich zu einer mittels FPU realisierten Berechnung sehr langsam, da FPUs über eine auf diesen Aufgabenbereich optimierte Prozeßverarbeitung verfügen. |
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http://www.lexikon-definition.de/FPU.html
(185 words)
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| | Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations |
| | Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link. | | | A floating-point unit was designed for use with control systems based on Pro-Log four-bit or eight-bit microprocessors.^The unit consists of a single board which can be pin-connected into existing control systems.^It provides the capability for floating-point arithmetic computations, including operations with transcendental and exponential functions.^9 figures, 2 tables. | | | Floating-point arithmetic unit for pro-log based control systems |
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http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=5206797
(129 words)
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| | Open Source Floating Point Unit |
| | The aim of this project is to develop an IEEE-754 synthesizable floating point core | | | FPU code This code includes the Adder/Subtractor block and all calculations needed by other blocks (rounding,normaliziation...). | | | FPU specification and design notes download ps file |
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http://www.geocities.com/SiliconValley/Pines/6639/ip/fpu
(103 words)
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| | FPU - Floating-Point Unit |
| | More information about the definition of FPU may appear below: | | | Searched for more definitions; no definitions of FPU found. | | | Every attempt has been made to provide you with the correct acronym for FPU. |
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http://www.auditmypc.com/acronym/FPU.asp
(98 words)
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| | Extensive Testing of Floating Point Unit |
| | The paper addresses the problem of developing test programs for IEEE754 and Intel x87 compliant floating-point units (FPUs). | | | Some data related to the cost (in time and RAM space) of developed tests are presented. | | | A balanced mixture of pseudorandom, fault and application oriented instruction sequences assures exhaustive testing. |
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http://csdl2.computer.org/persagen/DLAbsToc.jsp?resourcePath=/dl/proceedings/&toc=comp/proceedings/euromicro/2000/0780/01/0780toc.xml&DOI=10.1109/EURMIC.2000.874631
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| | ARM adds floating-point unit to processor cores |
| | Similarly the SA-1500 StrongARM, developed by Digital Equipment Corp., included a floating-point coprocessor, but the SA-1500 was dropped when Intel Corp. acquired Digital's semiconductor operations. | | | The applications that can benefit from floating point include high-performance graphics, gradually being considered at high levels of performance for portable equipment, and automotive engine management applications. | | | In fact, ARM has offered a floating-point unit on its ARM7500FE since April 1996, but this application-specific device is aimed at set-top box applications. |
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http://www.commsdesign.com/printableArticle?articleID=9900220
(659 words)
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| | FLOATING POINT UNIT |
| | They combine digital/analog electronics, performance art, and experimental video observation platforms to form multi-layered audio-visual environments. | | | Floating Point Unit uses and addresses new media technologies with a special emphasis on distance performance and internet broadcasting. | | | MARCH 7, 1997: TELEPRESENCE, 97 - Tokyo - NY collaboration with motion capture technology, FPU virtual environment. |
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http://www.newnyart.com/artistmedia/floating/floating.html
(538 words)
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| | Floating point Unit in VHDL (Source Code) |
| | I remeber this FPU sticks to IEEE 754 spec. | | | Floating point Unit in VHDL (Source Code) attached | | | 22 Mar 2003 6:59 Floating point Unit in VHDL (Source Code) |
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http://www.edaboard.com/viewtopic.php?p=174309#174309
(70 words)
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| | IEEE 754 Compatible Floating Point Unit (FPU) |
| | How to simulate the FPU in ModelSim with rest of the VHDL code | | | The unit is based on the open source unit available at opencores.org. | | | Matlab program to convert a number in IEEE 754 floating point format to a real numbers (ieee7542dec.m) |
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http://www.ece.northwestern.edu/~ismail/courses/c92/fpu
(170 words)
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| | Floating Point Unit (FPU) |
| | Next: Primary (Level 1) Cache and Cache Controller | | | Earlier computers had to use the integer unit of the processor to perform floating point operations (which is very slow) unless they also had a second chip dedicated to performing floating point calculations, called a math coprocessor. | | | Integers (and data stored as integers) are processed using the processor's integer execution unit(s). |
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http://www.pcguide.com/ref/cpu/arch/int/compFPU-c.html
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| | Floating-Point Unit from FOLDOC |
| | Next: floating underflow, F-Logic, flood, FLOP, Floppy, floppy, floppy disk | | | (FPU) A floating-point accelerator, usually in a single integrated circuit, possible on the same IC as the central processing unit. | | | Previous: Floating-Point SPECrate, Floating-Point SPECratio, floating point underflow |
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http://www.instantweb.com/foldoc/foldoc.cgi?floating-point+unit
(46 words)
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| | WARNING: fpexterrflt - No process owns floating point unit |
| | If this isn't exactly what you wanted, please try our Search (there's a LOT of techy and non-techy stuff here about Linux, Unix, Mac OS X and just computers in general!): | | | WARNING: fpexterrflt - No process owns floating point unit | | | Best of the Newsgroups: WARNING: fpexterrflt - No process owns floating point unit |
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http://www.aplawrence.com/Bofcusm/1870.html
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| | FLOATING POINT - Definition |
| | The IEEE specify a standard representation which is used by many hardware floating-point systems. | | | Normalisation is the process of converting a floating point number into canonical form where any number other than zero has a mantissa whose first digit is non-zero. |
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http://www.hyperdictionary.com/dictionary/floating+point
(85 words)
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| | Floating Point Unit Project |
| | This chip implements floating point addition and subtraction. | | | Each operand has 8 bits of mantissa, 4 bits of exponent and a sign bit. |
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http://www.stanford.edu/class/ee272/designs/96/Floating_Point_Unit_Project_96.html
(31 words)
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| | Floating Point Unit -- FPU is de afkorting van Floating Point Unit. Dit is... |
| | Voor de Intel x86-familie was bijvoorbeeld de 80287 de FPU die bij de 80286 CPU hoorde, en de 387 was de FPU van de 386 CPU. | | | Behalve FPU's van de fabrikant van de CPU waren er ook onafhankelijke types als de AMD 9511 die voor bijvoorbeeld de Apple II gebruikt kon worden en de chips van Weitek die als sneller alternatief voor de Intel FPU leverbaar was. | | | In het verleden was dit een aparte chip die naar wens bijgeplaatst kon worden. |
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http://floating-point-unit.nl.tracking24.net
(182 words)
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| | Dictionary.com/floating-point unit |
| | Get CleverKeys and look up words from any program - FREE download! | | | (FPU) A floating-point accelerator, usually in a single |
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http://dictionary.reference.com/search?q=floating-point%20unit
(66 words)
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| | Processor Design Tools |
| | The performance is given by the loss in CPI, assuming in order execution and a non pipelined FPU. | | | Given the specification for a FPU (cycle time and latencies), this tool will calculate the amount of area needed. |
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http://arith.stanford.edu/tools/fupa.html
(47 words)
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| | Floating Point Unit Localcolor Search Results |
| | If you would like to see the Floating point unit Localcolor search results, simply click here to go there directly. | | | Find More Information about "Floating point unit" in: | | | Or, If you'd prefer you can try one of our related searches for "Floating point unit": |
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http://www.alienartifacts.com/search/localcolor/Floating_point_unit
(82 words)
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| | Webmaster Forum - Floating point unit |
| | Can this correlate to the performance of the FPU or FLOPS. | | | And where can I get some info on this? |
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http://www.v7n.com/forums/showthread.php?t=13676
(103 words)
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| | List of computing topics |
| | History of the World History of the United States History of Europe Ancient History History Military History |
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http://www.worldhistory.com/wiki/L/List-of-computing-topics.htm
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