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    • 84. 发明授权
    • Method and apparatus to perform floating point operations
    • 执行浮点运算的方法和装置
    • US08898214B2
    • 2014-11-25
    • US13453056
    • 2012-04-23
    • Leonid DubrovinAlexander Rabinovitch
    • Leonid DubrovinAlexander Rabinovitch
    • G06F7/42
    • G06F7/485
    • A method of subtracting floating-point numbers includes determining whether a first sign associated with a first floating-point number is unequal to a second sign associated with a second floating-point number, determining whether a first exponent associated with the first floating-point number is less than a second exponent associated with the second floating-point number, negating a first mantissa associated with the first floating-point number when the first sign is unequal to the second sign and determining that the first exponent is less than the second exponent, and adding the first mantissa to a second mantissa associated with the second floating-point number when the first sign is unequal to the second sign and determining that the first exponent is less than the second exponent. Embodiments of a corresponding computer-readable medium and device are also provided.
    • 减去浮点数的方法包括确定与第一浮点数相关联的第一符号是否不等于与第二浮点数相关联的第二符号,确定是否与第一浮点数相关联的第一指数 小于与第二浮点数相关联的第二指数,当第一符号不等于第二符号并且确定第一指数小于第二指数时,否定与第一浮点数相关联的第一尾数, 以及当所述第一符号不等于所述第二符号并且确定所述第一指数小于所述第二指数时,将所述第一尾数添加到与所述第二浮点数相关联的第二尾数。 还提供了相应的计算机可读介质和设备的实施例。
    • 86. 发明授权
    • Arithmetic processing apparatus and arithmetic processing method
    • 算术处理装置和算术处理方法
    • US08549054B2
    • 2013-10-01
    • US12230029
    • 2008-08-21
    • Ryuji Kan
    • Ryuji Kan
    • G06F7/00G06F7/42
    • G06F7/38
    • In an arithmetic processing apparatus, a dividing unit divides a second bit string into a low-order bit part having a bit width equal to a first bit width and a high-order bit part which is higher than the low-order bit part, a first arithmetic unit performs arithmetic operations for a carry to and a borrow from the high-order bit part; and a second arithmetic unit performs addition of absolute values of the low-order bit part and the first bit string. Finally, a selecting unit selects an output of the first arithmetic unit from among an arithmetic operation result with a carry, an arithmetic operation result with a borrow, and the high-order bit part itself, according to information about the high-order bit part, sign information of the first bit string and the second bit string, and an intermediate result of the addition of the absolute values by the second arithmetic unit.
    • 在算术处理装置中,分割单元将第二比特串分为具有等于第一比特宽度的比特宽度的低位比特部分和高于低位比特部分的高位比特部分, 第一算术单元对从高位位进行进位和借位执行算术运算; 并且第二运算单元执行所述低位位部分和所述第一位串的绝对值的相加。 最后,选择单元根据有关高位位部分的信息,从具有进位的算术运算结果,借位运算结果和高阶位部分本身中选择第一算术单元的输出 ,第一位串和第二位串的符号信息,以及由第二运算单元添加绝对值的中间结果。
    • 90. 发明申请
    • ARITHMETIC CIRCUIT, ARITHMETIC PROCESSING APPARATUS AND METHOD OF CONTROLLING ARITHMETIC CIRCUIT
    • 算术电路,算术处理装置和控制算术电路的方法
    • US20120259905A1
    • 2012-10-11
    • US13437969
    • 2012-04-03
    • Ryuji KANHideyuki UNNOKenichi Kitamura
    • Ryuji KANHideyuki UNNOKenichi Kitamura
    • G06F7/42
    • G06F7/49942G06F7/483
    • An arithmetic circuit for quantizing pre-quantized data includes a first input register to store first-format pre-quantized data that includes a mantissa and an exponent, a second input register to store a quantization target exponent, an exponent-correction-value indicating unit to indicate an exponent correction value, an exponent generating unit to generate a quantized exponent obtained by subtracting the exponent correction value from the quantization target exponent, a shift amount generating unit to generate a shift amount obtained by subtracting the exponent of the pre-quantized data and the exponent correction value from the quantization target exponent, a shift unit to generate a quantized mantissa obtained by shifting the mantissa of the pre-quantized data by the shift amount generated by the shift amount generating unit, and an output register to store quantized data that includes the quantized exponent generated by the exponent generating unit and the quantized mantissa generated by the shift unit.
    • 用于量化预量化数据的算术电路包括:第一输入寄存器,用于存储包括尾数和指数的第一格式的预量化数据;存储量化目标指数的第二输入寄存器;指数校正值指示单元 指示指数校正值,指数生成单元,用于生成通过从量化目标指数中减去指数校正值而获得的量化指数;移位量生成单元,生成通过减去预量化数据的指数得到的移位量 以及来自量化目标指数的指数校正值,用于生成通过将预量化数据的尾数移位由移位量产生单元生成的移位量而获得的量化尾数的移位单元和存储量化数据的输出寄存器 其包括由指数生成单元生成的量化指数和量化的尾数gen 由换档单元擦除。