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    • 6. 发明授权
    • Apparatus and method for an address generation circuit
    • 地址生成电路的装置和方法
    • US07380099B2
    • 2008-05-27
    • US10956164
    • 2004-09-30
    • Sanu K. MathewMark A. AndersSarvesh H. KulkarniRam Krishnamurthy
    • Sanu K. MathewMark A. AndersSarvesh H. KulkarniRam Krishnamurthy
    • G06F12/00
    • G06F7/507G06F7/508
    • A method and apparatus for an address generation circuit. In one embodiment, the method includes computing a carry-in for at least one group of a predetermined number of bits of a propagate and a generate signal formed from a plurality of logical address components. Once the carry-in is computed, a plurality of conditional sums are generated for a logic 0 carry-in and a logic 1 carry-in. Subsequently, a sum is selected from the plurality of conditional sums to form a first portion of an effective address from the logical address components in a first stage and a second portion of the effective address in a second stage. In one embodiment, a fully dynamic high-performance sparse tree adder circuit that generates one in four carries, is used to form an address generation circuit, in accordance with one embodiment. Other embodiments are described and claimed.
    • 一种用于地址产生电路的方法和装置。 在一个实施例中,该方法包括计算由多个逻辑地址分量形成的传播信号和生成信号的预定位数的至少一组的进位。 一旦计算了进位,则为逻辑0进位和逻辑1进位产生多个条件和。 随后,从多个条件和中选出一个和,以在第二阶段中的第一阶段的逻辑地址分量和有效地址的第二部分中形成有效地址的第一部分。 在一个实施例中,根据一个实施例,使用产生四分之一载波的完全动态的高性能稀疏树加法器电路来形成地址生成电路。 描述和要求保护其他实施例。
    • 9. 发明授权
    • Instruction and logic for a simon block cipher
    • 一个simon块密码的指令和逻辑
    • US09473296B2
    • 2016-10-18
    • US14227718
    • 2014-03-27
    • Sanu K. MathewHimanshu KaulMark A. Anders
    • Sanu K. MathewHimanshu KaulMark A. Anders
    • H04L9/06G06F21/62G09C1/00
    • H04L9/0618G06F21/62G09C1/00H04L2209/24
    • A processor includes an input-circuit and a Simon block cipher. The Simon block cipher includes a data transformation circuit, a constant generator, and a key expansion circuit. The data transformation circuit includes logic to shift content of data storage registers. The key expansion circuit includes logic to determine a round key based upon an input symmetric key and data input, a previous round key, and a value from the constant generator. The constant generator includes logic to output a successive one of a list of constants each clock cycle, and to store the outputted constants in storage units. The number of storage units is less than the size of the list of constants.
    • 处理器包括输入电路和西门子分组密码。 Simon分组密码包括数据变换电路,恒定发生器和密钥扩展电路。 数据变换电路包括移位数据存储寄存器的内容的逻辑。 密钥扩展电路包括基于输入对称密钥和数据输入,先前的循环密钥和来自常量发生器的值来确定循环密钥的逻辑。 常数发生器包括用于输出每个时钟周期的常数列表中的连续的一个的逻辑,并将输出的常数存储在存储单元中。 存储单元的数量小于常量列表的大小。