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    • 6. 发明公开
    • Data processing system and method for calculating the sum of a base plus offset
    • 数据处理系统和用于计算的基本和偏移之和方法。
    • EP0594969A1
    • 1994-05-04
    • EP93113638.6
    • 1993-08-26
    • MOTOROLA, INC.
    • Sibigtroth, James M.Viot, J.GregLangan, John A.Broseghini, James L.
    • G06F9/355G06F7/50
    • G06F7/505G06F9/322G06F9/355G06F2207/3832
    • A data processing system (10) performs indexed addressing, autoincrementing, and autodecrementing using power of two byte boundaries. For example, a 5-bit offset allows a user to progress sixteen bytes either forward or backward through a table of data. An instruction specifying an operation to be performed, a pointer register (58, 60), and an offset value is provided to an execution unit (14). The pointer register (58, 60) stores a first address value and the offset value has a sign and a magnitude. An arithmetic logic unit, ALU, (52) inverts the sign of the offset value to provide an inverted sign value. A plurality of adders (100, 102, 104, 106, and 108) adds the offset value, the first address value, and the inverted sign value to generate an offset sum. A positive offset value is increased by one to generate a symmetric power of two offset range.
    • 一种数据处理系统(10)执行索引寻址,自动增量,并且使用两个字节边界的功率autodecrementing。 例如,一个5位的偏移允许用户无论是通过数据的一个表向前或向后前进16个字节。 到指定手术的指令将被执行,指针寄存器(58,60),以及偏移值在执行单元(14)被提供给。 指针寄存器(58,60)存储第一地址值和所述偏移值具有符号和大小。 算术逻辑单元,ALU,(52)反转偏移值,以提供到反相符号值的符号。 加法器(100,102,104,106,和108)中的多个加偏移值,第一地址值,并且反转的符号值,以产生抵消总和。 正的偏移值是由一个增加的,以产生的两个偏移范围内的对称的功率。
    • 7. 发明申请
    • SYSTEM AND METHOD FOR MAPPING MATHEMATICAL FINITE FLOATING-POINT NUMBERS
    • 用于映射数学有限浮点数的系统和方法
    • WO2006055882A2
    • 2006-05-26
    • PCT/US2005/042080
    • 2005-11-17
    • HOWARD, Robert, S.
    • HOWARD, Robert, S.
    • G06F7/38
    • H03M7/24G06F7/026G06F7/483G06F2207/3832
    • A floating-point number is encoded into a binary string. A left-to-right comparison of the binary string determines relative magnitude of the floating-point number. If the floating-point number is negative, then take an absolute value of the floating-point number. The resulting binary string conversion is then complemented. If the floating-point number is zero, then a value for the binary string is assigned. The value is a "1" followed by a plurality of "0"s. A portion of each byte of the binary string determines whether another byte follows in the binary string. A value of a bit of each byte of the binary string determines whether another byte follows. In another aspect, the floating-point number encodes to a binary string having a length as a function of the mantissa and exponent of the floating-point number.
    • 浮点数被编码成二进制字符串。 二进制串的从左到右比较确定浮点数的相对大小。 如果浮点数为负,则取绝对值的浮点数。 然后对所得到的二进制字符串转换进行补充。 如果浮点数为零,则分配二进制字符串的值。 该值为“1”,后跟多个“0”。 二进制字符串的每个字节的一部分确定二进制字符串中是否有另一个字节。 二进制字符串的每个字节的位的值确定是否跟随另一个字节。 在另一方面,浮点数编码为具有作为浮点数的尾数和指数的函数的长度的二进制串。
    • 9. 发明申请
    • SYSTEM AND METHOD FOR MAPPING MATHEMATICAL FINITE FLOATING-POINT NUMBERS
    • 用于映射数学有限浮点数的系统和方法
    • WO2006055882A3
    • 2007-04-12
    • PCT/US2005042080
    • 2005-11-17
    • HOWARD ROBERT S
    • HOWARD ROBERT S
    • G06F15/00
    • H03M7/24G06F7/026G06F7/483G06F2207/3832
    • A floating-point number is encoded into a binary string. A left-to-right comparison of the binary string determines relative magnitude of the floating-point number. If the floating-point number is negative, then take an absolute value of the floating-point number. The resulting binary string conversion is then complemented. If the floating-point number is zero, then a value for the binary string is assigned. The value is a "1" followed by a plurality of "0"s. A portion of each byte of the binary string determines whether another byte follows in the binary string. A value of a bit of each byte of the binary string determines whether another byte follows. In another aspect, the floating-point number encodes to a binary string having a length as a function of the mantissa and exponent of the floating-point number.
    • 浮点数被编码成二进制字符串。 二进制串的从左到右比较确定浮点数的相对大小。 如果浮点数为负,则取绝对值的浮点数。 然后对所得到的二进制字符串转换进行补充。 如果浮点数为零,则分配二进制字符串的值。 该值为“1”,后跟多个“0”。 二进制字符串的每个字节的一部分确定二进制字符串中是否有另一个字节。 二进制字符串的每个字节的位的值确定是否跟随另一个字节。 在另一方面,浮点数编码为具有作为浮点数的尾数和指数的函数的长度的二进制串。