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    • 9. 发明授权
    • Multiple operations employing divided arithmetic logic unit and multiple
flags register
    • 多个操作采用分割算术逻辑单元和多个标志寄存器
    • US5592405A
    • 1997-01-07
    • US484579
    • 1995-06-07
    • Robert J. GoveKarl M. GuttagKeith BalmerNicholas K. Ing-Simmons
    • Robert J. GoveKarl M. GuttagKeith BalmerNicholas K. Ing-Simmons
    • G06F15/167G06F12/02G06F12/06G06F15/173G06F15/80G06F7/38G06F7/00G06F7/50
    • G06F15/17375G06F12/0284
    • A data processing apparatus includes an arithmetic logic unit is divided into a plurality of sections. Each section generates at a corresponding output a digital resultant signal representing a combination of respective subsets of first and second multibit digital inputs. The arithmetic logic unit includes a status detector generating a single bit status signal indicative of said digital resultant signal of a corresponding section of the arithmetic logic unit. These single bit status signals are stored in predetermined locations within a multiple flags register. An options register stores an indication of the number of sections selected from a plurality of possible number of sections into which the arithmetic logic unit is divided. The arithmetic logic unit is further connected to the multiple flags register so that each section selects for output either corresponding bits of the first multibit digital input or the second multibit digital input dependent upon the digital state of a corresponding single status bit in the multiple flags register. This technique permits a variety of functions such as add with saturation, maximum, pixel transparency and color expansion.
    • 一种数据处理装置,包括被分成多个部分的算术逻辑单元。 每个部分在相应的输出处产生表示第一和第二多位数字输入的各个子集的组合的数字结果信号。 算术逻辑单元包括状态检测器,其产生指示算术逻辑单元的相应部分的所述数字结果信号的单位状态信号。 这些单位状态信号存储在多标志寄存器内的预定位置。 选项寄存器存储从算术逻辑单元划分到的多个可能数量的区段中选择的区段数量的指示。 算术逻辑单元还连接到多标志寄存器,使得每个部分选择输出第一多位数字输入或第二多位数字输入的对应位,取决于多标志寄存器中对应的单个状态位的数字状态 。 这种技术允许各种功能,如饱和度,最大值,像素透明度和颜色扩展等。
    • 10. 发明授权
    • Guided transfers with variable stepping
    • 引导传输与可变步进
    • US5651127A
    • 1997-07-22
    • US209123
    • 1994-03-08
    • Robert J. GoveKarl M. GuttagKeith BalmerChristopher J. ReadIain RobertsonNicholas Ing Simmons
    • Robert J. GoveKarl M. GuttagKeith BalmerChristopher J. ReadIain RobertsonNicholas Ing Simmons
    • G06F9/345G06F9/38G06F13/28G09G5/393G06F91/26G06F9/34G06F12/00G06F12/14
    • G09G5/393G06F13/28G06F9/345G06F9/3879
    • This invention is a manner of control of the addresses of memory accesses. The data processing device of this invention includes a memory, a control circuit, a guide table and an address generating circuit. The control circuit receives a packet transfer request and packet transfer parameters. The packet transfer parameters include a start address, a number of guide table entries and a table pointer. The guide table includes guide table entries, each guide table entry having an address value and dimension values defining a block of addresses. The table pointer initially points to a first guide table entry in the guide table. The address generating circuit forms a set of block of addresses for memory access corresponding to each guide table entry, having a start address from a predetermined combination of the start address and the address value of the guide table entry. The block of addresses are formed from the dimension values. Following the memory accesses, the address generating circuit updates the table pointer to point to a next entry in the guide table. The address generating circuit may optionally form the predetermined combination of starting address and address value of guide table entry by adding the address value to the prior block starting address or by adding the guide table value to the starting address. The memory access may be a memory read from the block of addresses or a memory write to the block of addresses. In the preferred embodiment, memory, a data processor and a data transfer controller performing the above memory accesses is constructed in a single semiconductor chip. The data transfer controller may access external memory in the same manner as on-chip memory.
    • 本发明是对存储器存取地址的控制方式。 本发明的数据处理装置包括存储器,控制电路,引导表和地址产生电路。 控制电路接收分组传送请求和分组传送参数。 分组传送参数包括起始地址,指导表条目的数目和表指针。 指南表包括指南表条目,每个指南表条目具有定义地址块的地址值和维度值。 表指针最初指向指南表中的第一个指南表项。 地址生成电路形成与每个引导表条目相对应的用于存储器访问的地址块集合,具有来自引导表条目的起始地址和地址值的预定组合的起始地址。 地址块由维度值形成。 在存储器访问之后,地址产生电路更新表指针以指向指南表中的下一条目。 地址产生电路可以通过将地址值添加到先前块开始地址或通过将引导表值添加到起始地址来可选地形成指南表入口的起始地址和地址值的预定组合。 存储器访问可以是从地址块读取的存储器或写入地址块的存储器。 在优选实施例中,执行上述存储器访问的存储器,数据处理器和数据传输控制器被构造在单个半导体芯片中。 数据传输控制器可以以与片上存储器相同的方式访问外部存储器。