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Topic: Single-precision

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Multics Bibliography It is concluded that the use of single precision and 56 decimal digit extended precision interval arithmetic can, at times, be extremely useful. The testing showed that, when using the 56 decimal digit data type, much better bounds were obtained for the results than when using the single precision interval data type. Interval arithmetic can be used to determine the precision of the arithmetic required to guarantee a given precision in the results of an algorithm. www.multicians.org /biblio.html   (11583 words)

MacNN Forums - AltiVec sucks If you use so-called “single precision” floating-point values, these are half the size of the normal floating-point values, and then the maximum vector size is 4, which is still pathetic, and comes at the expensive of accuracy in the floating-point calculations. The lower accuracy of single precision FP is usually unacceptable for scientific purposes. Single precision (32 bits) is useful in some engineering applications and certainly for games. forums.macnn.com /printthread.php?t=253048   (11583 words)

cubic.sml Compilers for the language C often perform operations on single precision variables ('float') in double precision, converting back to single precision for storage. A resolution of 1 in 1,000,000 should in principle be achievable using single precision floating point (32 bit) arithmetic, which would be more than adequate for most current displays. For example, using a VAX8600, the time taken to solve 10,000 different quartics was 6 seconds, for Fortran single precision (using f77), 15 seconds for C single precision (using cc), and 16 seconds for C using double precision. www.acooke.org /jara/mllib/cubic.sml   (11583 words)

blas2  - Compaq Tru64 UNIX Subprogram Name Operation sgbmv Calculates, in single-precision arithmetic, a matrix-vector product for either a real general band matrix or its transpose. ctpsv Solves, in single-precision arithmetic, a system of linear equations where the coefficient matrix is a complex triangular matrix stored in packed form. strmv Calculates, in single-precision arithmetic, a matrix-vector product for either a real triangular matrix or its transpose. h18000.www1.hp.com /math/documentation/cxml/blas2.3dxml.html   (11583 words)

Eric Fleegal's WebLog If double-precision is the native precision, the extra cost of narrowing results to single-precision MAY be quite high… much higher, in fact, than the cost associated with the memory overhead of doubles (cache misses etc). Keep in mind that on many systems, double precision computations are just as fast or even faster than single precision computations. With carefully coded algorithms, single precision can yield very accurate results; however, most users (even most computer scientists) are not trained to devise such algorithms for all but the simplest cases. blogs.msdn.com /ericflee   (4613 words)

Ammunition (Reusable packages) - C++ interface: Package for machine-independent IEEE floating point arithmetic But the ascii representations are identical when the functions for IEEE single, double, and quad precision numbers do not fix imprecise result exception or less than 9 (17 or 36) digits of the fractions in the ascii representations are compared. Actually no one output exceptions occur during transformation of single precision floating point number to double (or quad) precision number and of double precision floating point number to quad precision number. transform single precision to decimal ascii representation with obligatory integer part (1 digit), fractional part (of constant length), and optional exponent. cocom.sourceforge.net /ammunition++-11.html   (4613 words)

signal-processing  - Compaq Tru64 UNIX The signal processing library also includes a non-recursive filter that can be used in four ways: � Lowpass � Highpass � Bandpass � Bandstop (notch) All FFT, convolution, and correlation routines are available in real and complex versions, in both single and double precision. Name Operation sfft Calculates, in single-precision arithmetic, the fast forward or inverse Fourier transform of one- dimensional, real data. sfft_grp Calculates, in single-precision arithmetic, the fast forward or inverse Fourier transform of a group of real data. h18000.www1.hp.com /math/documentation/cxml/signal-processing.3dxml.html   (4613 words)

What Every Computer Scientist Should Know About Floating-Point Arithmetic In the case of single precision, where the exponent is stored in 8 bits, the bias is 127 (for double precision it is 1023). IEEE 754 single precision is encoded in 32 bits using 1 bit for the sign, 8 bits for the exponent, and 23 bits for the significand. Guard digits were considered sufficiently important by IBM that in 1968 it added a guard digit to the double precision format in the System/360 architecture (single precision already had a guard digit), and retrofitted all existing machines in the field. docs.sun.com /source/806-3568/ncg_goldberg.html   (8200 words)

What do you prefer: real(8) or double precision and why? You don't have to worry about whether that is single or double precision or about what the particular kind number for it is; this will work with *ALL* f90 compilers that support a real at least that big (which is all f90 compilers that exist now or are ever likely to). This would have the advantage that when you switch to a computer with higher default precision, you may no longer need double and might get faster code with single. A nd it was so ridiculously easy to change the precision of every single floating point var iable in my code (changing one number in my Type_Kinds.f90 module and recompiling) that I don't know how people got by without the kind type specification system in the past! www.codecomments.com /message265080.html   (2405 words)

Homepage for UCB BLAST Forum Activities We have designed all our routines assuming that single precision arithmetic is actually done in IEEE single precision (32 bits) and that double precision arithmetic is actually done in IEEE double precision (64 bits). All input, output, and internal variables are single or double precision and real or complex. This library of routines is part of a reference implementation for the Dense and Banded BLAS routines, along with their Extended and Mixed Precision versions, as documented in Chapters 2 and 4 of the BLAS Technical Forum Standard. crd.lbl.gov /~xiaoye/XBLAS   (1904 words)

Double Precision For this, it uses pairs of single precision registers to hold operands. However SPIM allows all 32 registers in single precision instructions. Some MIPS processors allow only even-numbered registers ($f0, $f2,...) for single precision instructions. chortle.ccsu.ctstateu.edu /AssemblyTutorial/Chapter-31/ass31_3.html   (140 words)

SPARC Version 9 added 16 more double-precision registers, but these additional double-precision registers can not be used as single-precision registers. Each of them can be used as two single-precision registers, making total 32 single-precision registers. An odd-even number pair of double-precision registers can be used as a quad precision register, thus allowing 8 quad-precision registers. www.sciencedaily.com /encyclopedia/sparc   (140 words)

AK ITEC 1011 S1 2000 Assignment Two True or False: Single precision floating point format can store all real numbers in the range 2 The following numbers are in IEEE 754 single-precision floating-point format. Convert the following decimal numbers to floating-point format using single-precision IEEE 754 format. www.atkinson.yorku.ca /~campeanu/1011/A2.htm   (216 words)

Double Precision, etc. > are single to double precision - ie change sgemm to dgemm, or at least (IBM single precision) or 64 bit (IBM double precision) number. hardware support for 64 bit (Cray single precision) but only software to do domino.research.ibm.com /syssftpr/parallel/actc-dg.nsf/ccb088a1de6aac738525631c0067846b/11039944E8C597DD8525676A0059AD5F?OpenDocument   (428 words)

Siemens AG - Compact; rugged; sharp transition: New single-channel approach-path indicator system from Siemens ADB With its new “PAPI SPL” single-channel indicator, Siemens ADB is now offering a compact and rugged unit for approach slope guidance (Precision Approach Path Indicator, PAPI). Siemens AG - Compact; rugged; sharp transition: New single-channel approach-path indicator system from Siemens ADB Compact; rugged; sharp transition: New single-channel approach-path indicator system from Siemens ADB www.siemens.com /index.jsp?sdc_p=ft2mls4uo1320913ni2pcz3&sdc_sid=27252246539&   (709 words)

RISC System/6000 200 Series workstations and servers Five of the tests are single precision, while the remaining nine are double precision. Linpack SP: Single Precision, n=100 results with AIX XL FORTRAN Compiler/6000, with optimization. The 220 and 230 models offer a range of POWER single chip processors with clock speeds of up to 45 MHz in the latter. wwwbs.informatik.htw-dresden.de /ibm/200series.html   (709 words)

Single -- Facts, Info, and Encyclopedia article In (The branch of engineering science that studies (with the aid of computers) computable processes and structures) computer science, a single is used as shorthand for (Click link for more info and facts about single precision) single precision. The term "being (A base hit on which the batter stops safely at first base) single" is a relationship term which means that a person is not (Click link for more info and facts about married) married. A (A base hit on which the batter stops safely at first base) single is a song commercially released separately from an album. www.absoluteastronomy.com /encyclopedia/s/si/single.htm   (709 words)

Single Action Revolvers Single Action Revolver Services by Alpha Precision, Inc. Alpha Precision performs the usual single action modifications: trigger job, barrel cylinder gap tightening, custom base pins, barrel shortening, custom barrels, barrel fitting, etc. We also produce our own cylinders of aircraft certified chrome moly or precipitation hardened stainless. Cylinders are available for Ruger New Model Blackhawks, and 3rd generation Colt single actions. www.alphaprecisioninc.com /revolver/singleaction.htm   (709 words)

BYTE.com Single- or dou ble-precision floating-point multiply, add, subtract, compare, and convert operations require two cycles, although multiplications need a third cycle to transfer the result. They can execute single- or double-precision division and square-root operations in parallel. The goal of this design is to combine the brute force of multiple functional units with the finesse of speculative, out-of-ord er execution. www.byte.com /art/9411/sec8/art6.htm   (709 words)

Florida Gun Exchange Based on the 92 Brigadier FS model and equipped with the same heavier and re-contoured slide, the 92 Stock pistol is a single/double-action model with half-cock notch, 4.9” (125 mm) barrel with accurizing bushing for maximum shot precision. Based on the 96 Brigadier model and equipped with the same heavier and re-contoured slide, the 96 Stock pistol is a single/double-action model with half-cock notch, 4.9” (125 mm) barrel with accurizing bushing for maximum shot precision. This compact, rugged small frame measures just 4.9 inches (125 mm) overall and weighs only 11.5 ounces (325 grams). www.floridagunexchange.com /asp/prodtype.asp?prodtype=12&ph=cat   (709 words)

Glossary: Double Precision Sweetwater.com Computers with 32-bit data stores (single precision) provide 64-bit double precision, in a series of 8-byte words. For example, if a single-precision number requires 32 bits to define, its double-precision counterpart will be 64 bits long. A double precision number, sometimes called a double, may be an integer, fixed point, or floating point. www.sweetwater.com /expert-center/glossary/t--DoublePrecision   (176 words)

Brandywine Communications: Detail Bus Level Computer Clocks Single slot 6U B or C size, 32 bit precision timing module that is compatible with VXI computers. Single slot 6U, 32 bit precision timing module that is compatible with VME computers. Single CMC Size PCI Mezzanine Card (PMC) featuring standard conduction cooling bars.The 32 bit interface provides time from Microsecond through years. brandywinecomm.com /comptclk_Bds.html   (176 words)

IEEE Standard 754 Floating-Point Single-precision floating-point, on the other hand, is unable to match this resolution with its 24 bits. The exponent field contains 127 plus the true exponent for single-precision, or 1023 plus the true exponent for double precision. For double precision, the exponent field is 11 bits, and has a bias of 1023. stevehollasch.com /cgindex/coding/ieeefloat.html   (1366 words)

The IEEE standard for floating point arithmetic This standard specifies how single precision (32 bit) and double precision (64 bit) floating point numbers are to be represented, as well as how arithmetic should be carried out on them. The IEEE single precision floating point standard representation requires a 32 bit word, which may be represented as numbered from 0 to 31, left to right. The IEEE double precision floating point standard representation requires a 64 bit word, which may be represented as numbered from 0 to 63, left to right. www.psc.edu /general/software/packages/ieee/ieee.html   (495 words)

IA-64 Floating-Point Operations and the IEEE Standard for Binary Floating-Point Arithmetic In memory, floating-point numbers can only be stored in single precision, double precision, double-extended precision, and register file format ('spilled' as a 128-bit entity, containing the value of the floating-point register in the lower 82 bits). Three floating-point formats described in the IEEE Standard are implemented as required: single precision (M=8, N=24), double precision (M=11, N=53), and double-extended precision (M=15, N=64). The floating-point format used in a given computation is determined by the floating-point instruction (some instructions have a precision control completer pc specifying a static precision) or by the precision control field (pc), and by the widest-range exponent (wre) bit in the Floating-Point Status Register (FPSR). support.intel.com /technology/itj/q41999/articles/art_6c.htm   (1068 words)

Single Single precision A single-precision number is generally considered to be one that occupies a single addressed location i... Single nucleotide polymorphism A Single Nucleotide Polymorphism or SNP (pronounced snip) is a genome is altered. It is the best-selling single malt in the Scottish mar... www.brainyencyclopedia.com /topics/single.html   (1603 words)

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