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    • 41. 发明授权
    • Storage pre-alignment and EBCDIC, ASCII and unicode basic latin conversions for packed decimal data
    • 用于打包十进制数据的存储预对齐和EBCDIC,ASCII和unicode基本拉丁转换
    • US07167968B2
    • 2007-01-23
    • US10834637
    • 2004-04-29
    • Fadi Y. BusabaSteven R. CarloughMark A. CheckChristopher A. KrygowskiJohn G. Rell, Jr.Frank Tanzi
    • Fadi Y. BusabaSteven R. CarloughMark A. CheckChristopher A. KrygowskiJohn G. Rell, Jr.Frank Tanzi
    • G06F12/06
    • G06F9/30025G06F9/30032G06F9/30036G06F9/30043G06F9/3816G06F9/3824G06F12/0886
    • A method of pre-aligning data for storage during instruction execution improves performance by eliminating the cycles otherwise required for data alignment. The method can convert data between ASCII and Packed Decimal format, and between Unicode Basic Latin and Packed Decimal format. Conversion to Packed Decimal format is needed for decimal hardware in a microprocessor designed to generate decimal results. Converting from Packed Decimal to ASCII and Unicode Basic Latin is necessary to report Decimal Arithmetic results in a required format for the application program. To further improve performance, all available write ports in the fixed point unit (FXU) are utilized to reduce the number of cycles necessary to store results. To prevent data fetching of the unused destination data from slowing down instruction execution, the destination locations are tested for storage access exceptions, but the data for these operands are not actually fetched. A single read request from the FXU to the operand buffers effectively reads the entire destination address (up to 8 double-words of data) in a single cycle.
    • 在指令执行期间预先对准用于存储的数据的方法通过消除数据对准所需的周期来提高性能。 该方法可以在ASCII和Packed Decimal格式之间以及Unicode Basic Latin和Packed Decimal格式之间转换数据。 转换为打包十进制硬件需要十进制格式,用于生成十进制结果的微处理器。 从包装十进制转换为ASCII和Unicode基本拉丁文需要以应用程序所需的格式报告十进制算术结果。 为了进一步提高性能,利用固定点单元(FXU)中的所有可用写入端口来减少存储结果所需的周期数。 为了防止数据获取未使用的目标数据缓慢的指令执行,目标位置被测试存储访问异常,但是这些操作数的数据实际上并没有被提取。 从FXU到操作数缓冲区的单个读取请求在单个周期中有效读取整个目标地址(最多8个双字的数据)。
    • 42. 发明授权
    • Decimal multiplication for superscaler processors
    • 超标量处理器的十进制乘法
    • US07167889B2
    • 2007-01-23
    • US10436392
    • 2003-05-12
    • Fadi Y. BusabaSteven R. CarloughChristopher A. KrygowskiJohn G. Rell, Jr.
    • Fadi Y. BusabaSteven R. CarloughChristopher A. KrygowskiJohn G. Rell, Jr.
    • G06F7/523
    • G06F9/3001G06F7/496
    • A method for decimal multiplication in a superscaler processor comprising: obtaining a first operand and a second operand; establishing a multiplier and an effective multiplicand from the first operand and the second operand; and generating and accumulating a partial product term every two cycles. The partial product terms are created from the effective multiplicand and multiples of the multiplier, where the effective multiplicand is stored in a first register file, the multiples being ones times the effective multiplier, two times the effective multiplier, four times the effective multiplier and eight times the effective multiplier and the partial product terms are added to an accumulation of previous partial product terms shifted one digit right such that a digit shifted off is preserved as a result digit.
    • 一种用于在超标量处理器中进行十进制相乘的方法,包括:获得第一操作数和第二操作数; 从第一个操作数和第二个操作数建立乘数和有效的被乘数; 并且每两个周期产生和累积部分乘积项。 部分乘积项是从乘法器的有效乘数和乘数创建的,其中有效被乘数存储在第一个寄存器文件中,倍数是有效乘数的倍数,有效乘数的两倍,有效乘数的四倍和八倍 乘以有效乘数和部分乘积项添加到前一个部分乘积项的累积中,该乘积项被移位一位数字,使得数字移位被保留为结果位。