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1. 发明授权

EP3118737B1 ARITHMETIC PROCESSING DEVICE AND METHOD OF CONTROLLING ARITHMETIC PROCESSING DEVICE 有权
标题翻译：算术处理设备和控制算术处理设备的方法
公开(公告)号：EP3118737B1
公开(公告)日：2017-12-13
申请号：EP16179328.6
申请日：2016-07-13
申请人： Fujitsu Limited
发明人： HONDO, Mikio
IPC分类号： G06F7/556
CPC分类号： G06F7/4833 , G06F7/556 , G06F2207/483
摘要： An arithmetic processing device includes: a first memory configured to store values of a first coefficient of a logarithmic function, where the logarithmic function is decomposed into a series operation term and the coefficient term, depending on respective values of a first bit group included in operand data of a first instruction to calculate the value of the first coefficient; a second memory configured to store values of a second coefficient included in the series operation term depending on the respective values of the first bit group included in operand data of a second instruction to calculate the value of the second coefficient; and a selector configured to select the value of the first coefficient read from the first memory based on the execution of the first instruction and select the value of the second coefficient read from the second memory based on the execution of the second instruction.

2. 发明公开

EP3118737A1 ARITHMETIC PROCESSING DEVICE AND METHOD OF CONTROLLING ARITHMETIC PROCESSING DEVICE 有权
标题翻译：算术处理设备及其控制方法的算术处理装置
公开(公告)号：EP3118737A1
公开(公告)日：2017-01-18
申请号：EP16179328.6
申请日：2016-07-13
申请人： Fujitsu Limited
发明人： HONDO, Mikio
IPC分类号： G06F7/556
CPC分类号： G06F7/4833 , G06F7/556 , G06F2207/483
摘要： An arithmetic processing device includes: a first memory configured to store values of a first coefficient of a logarithmic function, where the logarithmic function is decomposed into a series operation term and the coefficient term, depending on respective values of a first bit group included in operand data of a first instruction to calculate the value of the first coefficient; a second memory configured to store values of a second coefficient included in the series operation term depending on the respective values of the first bit group included in operand data of a second instruction to calculate the value of the second coefficient; and a selector configured to select the value of the first coefficient read from the first memory based on the execution of the first instruction and select the value of the second coefficient read from the second memory based on the execution of the second instruction.
摘要翻译：算术处理装置，包括：被配置为存储一个对数函数，其中，所述对数函数被分解成一系列的操作项和系数项，依赖于第一位组的respectivement值的第一系数的值的第一存储器包括在操作数第一指令以计算第一系数的值的数据; 被配置为将第二系数的存储值的第二存储器包括在一系列操作术语取决于第一比特组的值respectivement中包括的第二指令计算所述第二系数的值的操作数数据; 和选择器配置为选择从基于所述第一指令的执行的第一存储器读出的第一系数的值，并选择从基于所述第二指令的执行的第二存储器读取所述第二系数的值。

3. 发明公开

EP1884859A2 Single datapath floating point implementation of RCP, SQRT, EXP and LOG functions and a low latency RCP based on the same techniques 有权
标题翻译：浮使用基于所述相同的程序的RCP，SQRT，EXP和LOG功能和低延迟RCP单个数据路径点执行
公开(公告)号：EP1884859A2
公开(公告)日：2008-02-06
申请号：EP07111660.2
申请日：2007-07-03
申请人： Vivante Corporation
发明人： Cai, Mike M. , Zhong, Lefan
IPC分类号： G06F1/035 , G06F7/38
CPC分类号： G06F7/60 , G06F1/0356 , G06F7/5525 , G06F7/556 , G06F2101/08 , G06F2101/10 , G06F2101/12
摘要： Methods and apparatus are provided for computing mathematical functions comprising a single pipeline for performing a polynomial approximation (e.g. a quadratic polynomial approximation, or the like), and one or more data tables corresponding to at least one of the RCP, SQRT, EXP or LOG functions operable to be coupled to the single pipeline according to one or more opcodes, wherein the single pipeline is operable for computing at least one of RCP, SQRT, EXP or LOG functions according to the one or more opcodes.
摘要翻译：提供了方法和装置，用于计算数学函数包括单个管道用于执行多项式近似（例如二次多项式近似，或类似物），以及一个或多个数据表对应于所述RCP的至少一个，SQRT，EXP或LOG 可操作功能被耦合到单个管道gemäß到一个或多个操作码，worin单管道可操作用于计算RCP，SQRT，EXP或LOG功能gemäß中的至少一个到所述一个或多个操作码。

4. 发明公开

EP1769334A1 COMPLEX LOGARITHMIC ALU 审中-公开
标题翻译：复杂的对数ALU
公开(公告)号：EP1769334A1
公开(公告)日：2007-04-04
申请号：EP05769168.5
申请日：2005-06-02
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ)
发明人： DENT, Paul, Wilkinson
IPC分类号： G06F7/48
CPC分类号： G06F7/556 , G06F7/4806
摘要： The present invention describes a method and apparatus for performing logarithmic arithmetic with real and/or complex numbers represented in a logarithmic format. In one exemplary embodiment, an ALU implements logarithmic arithmetic on complex numbers represented in a logpolar format. According to this embodiment, memory in the ALU stores a look-up table used to determine logarithms of complex numbers, while a processor in the ALU generates an output logarithm based on complex input operands represented in logpolar format using the stored look-up table. In another exemplary embodiment, the ALU performs logarithmic arithmetic on real and complex numbers represented in logarithmic format. In this embodiment, the memory stores two look-up tables, one for determining logarithms of real numbers and one for determining logarithms of complex numbers, while the processor generates an output logarithm based on real or complex input operands represented in logarithmic format using the real or complex look-up tables, respectively.
摘要翻译：本发明描述了一种用于以对数格式表示的具有实数和/或复数的对数算术的方法和设备。在一个示例性实施例中，ALU对以对数格式表示的复数进行对数运算。根据该实施例，ALU中的存储器存储用于确定复数对数的查找表，而ALU中的处理器基于使用所存储的查找表以对数格式表示的复数输入操作数来生成输出对数。在另一个示例性实施例中，ALU对以对数格式表示的实数和复数进行对数运算。在该实施例中，存储器存储两个查询表，一个用于确定实数的对数，另一个用于确定复数的对数，而处理器基于使用实数的对数格式表示的实数或复数输入操作数生成输出对数或复杂的查找表。

5. 发明授权

EP1001334B1 Logarithm / antilog calculator 有权
标题翻译：对数/反对数计算器
公开(公告)号：EP1001334B1
公开(公告)日：2007-01-24
申请号：EP99203820.8
申请日：1999-11-16
申请人： TEXAS INSTRUMENTS INCORPORATED
发明人： Allred, Rustin W.
IPC分类号： G06F7/556
CPC分类号： G06F7/556

6. 发明授权

EP0673564B1 A DEVICE FOR CONVERSION OF A BINARY FLOATING-POINT NUMBER INTO A BINARY 2-LOGARITHM OR THE OPPOSITE 失效
标题翻译： DEVICE FOR的二进制浮点数为二进制数底2 OR ITS逆转CONVERSION
公开(公告)号：EP0673564B1
公开(公告)日：2000-03-29
申请号：EP94902160.4
申请日：1993-12-02
申请人： Forskarpatent i Syd AB
发明人： HERTZ, Erik
IPC分类号： H03M7/24 , G06F7/38
CPC分类号： G06F7/556 , H03M7/24

7. 发明公开

EP0366155A3 Logarithmic function arithmetic unit including means for separately processing pseudo division and multiplication 失效
标题翻译：对数函数算术单元，包括用于单独处理PSEUDO分类和多项式的方法
公开(公告)号：EP0366155A3
公开(公告)日：1991-11-13
申请号：EP89120128.7
申请日：1989-10-30
申请人： NEC CORPORATION
发明人： Nakayama, Misayo c/o NEC Corporation
IPC分类号： G06F7/556 , G06F1/03
CPC分类号： G06F1/0307 , G06F7/4833 , G06F7/556
摘要： In a log e (1 + x/y) arithmetic unit by use of the STL algorithm, in order to reduce the arithmetic time, a pseudo division is at first effected by use of w = (2X k - Y k ) for k, initial values being mantissas X and Y of given x 2 -i ·X and y = 2 -j ·Y to produce X m and Y m , and thereafter, using X m and Y m as initial values a pseudo multiplication is effected by use of X k+1 = (X k + Γ k ) or X k+1 = X k /2 for k to obtain a mantissa of log e (1 + x/y). The unit comprises coefficient generator for producing k and Γ k , and first and second adder/subtractors accompanying with first and second registers for executing the pseudo division and the pseudo multipliction according to k and Γ k from the coefficient generator.

8. 发明公开

EP1884859A3 Single datapath floating point implementation of RCP, SQRT, EXP and LOG functions and a low latency RCP based on the same techniques 有权
标题翻译： RCP，SQRT，EXP和LOG函数的单数据通路浮点实现以及基于相同技术的低延迟RCP
公开(公告)号：EP1884859A3
公开(公告)日：2017-07-19
申请号：EP07111660.2
申请日：2007-07-03
申请人： Vivante Corporation
发明人： Cai, Mike M. , Zhong, Lefan
IPC分类号： G06F1/035 , G06F7/556 , G06F7/552
CPC分类号： G06F7/60 , G06F1/0356 , G06F7/5525 , G06F7/556 , G06F2101/08 , G06F2101/10 , G06F2101/12
摘要： Methods and apparatus are provided for computing mathematical functions comprising a single pipeline for performing a polynomial approximation (e.g. a quadratic polynomial approximation, or the like), and one or more data tables corresponding to at least one of the RCP, SQRT, EXP or LOG functions operable to be coupled to the single pipeline according to one or more opcodes, wherein the single pipeline is operable for computing at least one of RCP, SQRT, EXP or LOG functions according to the one or more opcodes.
摘要翻译：提供了用于计算数学函数的方法和设备，所述数学函数包括用于执行多项式近似（例如二次多项式近似等）的单个管线以及与RCP，SQRT，EXP或LOG中的至少一个相对应的一个或多个数据表可操作以根据一个或多个操作码耦合到单个管线的功能，其中单个管线可操作用于根据一个或多个操作码来计算RCP，SQRT，EXP或LOG功能中的至少一个。

9. 发明公开

EP3176981A1 METHOD AND DEVICE FOR DETECTING TYPE OF NETWORK DATA FLOW 有权
标题翻译：用于检测网络数据流类型的方法和设备
公开(公告)号：EP3176981A1
公开(公告)日：2017-06-07
申请号：EP15874869.9
申请日：2015-08-10
申请人： Huawei Technologies Co., Ltd.
发明人： CHEN, Zhitang , GENG, Yanhui , POUPART, Pascal
IPC分类号： H04L12/26
CPC分类号： H04L47/2483 , G06F7/556 , H04L43/00 , H04L43/16 , H04L45/70 , H04L69/22
摘要： An embodiment of the present invention provides a method for detecting a type of a data flow, where the method includes: obtaining a header of a first data packet of a current data flow, and obtaining a pattern vector of the current data flow from the header; comparing the at least one feature dimension in the pattern vector of the current data flow with a corresponding feature dimension in a pattern vector of at least one historical data flow, so as to obtain at least one pattern similarity of the current data flow; predicting a length of the current data flow according to the at least one pattern similarity of the current data flow and a length of the corresponding at least one historical data flow; and comparing the predicted length of the current data flow with a preset threshold, and determining whether the current data flow is a large data flow or a small data flow according to a comparison result. In the present invention, a type of a data flow can be detected by detecting a header of a first data packet of the data flow, which can determine a type of a network data flow in real time and can improve determining precision.
摘要翻译：本发明实施例提供了一种数据流的类型检测方法，包括：获取当前数据流的第一数据包的头部，从头部获取当前数据流的模式向量 ; 将当前数据流的模式向量中的至少一个特征维度与至少一个历史数据流的模式向量中的对应的特征维度进行比较，以获得当前数据流的至少一个模式相似度; 根据所述当前数据流的至少一个图样相似度和所述对应的至少一个历史数据流的长度，预测所述当前数据流的长度; 将当前数据流的预测长度与预设阈值进行比较，根据比较结果确定当前数据流是大数据流还是小数据流。在本发明中，可以通过检测数据流的第一数据包的头部来检测数据流的类型，这可以实时确定网络数据流的类型并且可以提高确定精度。

10. 发明公开

EP3008618A1 COMPILER OPTIMIZATION FOR COMPLEX EXPONENTIAL CALCULATIONS 有权
标题翻译： COMPLEEROPTIMIERUNGFÜRKOMPLEXE EXPONENTILELE BERECHNUNGEN
公开(公告)号：EP3008618A1
公开(公告)日：2016-04-20
申请号：EP13886729.6
申请日：2013-06-14
申请人： Intel IP Corporation
发明人： BIKSHANDI, Ganesh , KIM, Daehyun
IPC分类号： G06F17/10 , G06F9/45
CPC分类号： G06F8/443 , G06F7/4806 , G06F7/556 , G06F8/4434 , G06F8/452 , G06F17/10 , G06F2207/5561
摘要： Technologies for optimizing complex exponential calculations include a computing device with optimizing compiler. The compiler parses source code, optimizes the parsed representation of the source code, and generates output code. During optimization, the compiler identifies a loop in the source code including a call to the exponential function having an argument that is a loop-invariant complex number multiplied by the loop index variable. The compiler tiles the loop to generate a pair of nested loops. The compiler generates code to pre-compute the exponential function and store the resulting values in a pair of coefficient arrays. The size of each coefficient array may be equal to the square root of the number of loop iterations. The compiler applies rewrite rules to replace the exponential function call with a multiplicative expression of one element from each of the coefficient arrays. Other embodiments are described and claimed.
摘要翻译：用于优化复数指数计算的技术包括具有优化编译器的计算设备。编译器解析源代码，优化源代码的解析表示，并生成输出代码。在优化期间，编译器识别源代码中的循环，包括对具有循环不变复数乘以循环索引变量的参数的指数函数的调用。编译器平铺循环以生成一对嵌套循环。编译器生成代码以预先计算指数函数，并将结果值存储在一对系数数组中。每个系数数组的大小可以等于循环次数的平方根。编译器使用重写规则来替换来自每个系数数组的一个元素的乘法表达式的指数函数调用。描述和要求保护其他实施例。

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