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    • 1. 发明授权
    • System and method for adding an instruction to an instruction set architecture
    • 用于向指令集架构添加指令的系统和方法
    • US07143270B1
    • 2006-11-28
    • US10769203
    • 2004-01-30
    • Kevin W. RuddAllan D. KniesDale C. MorrisJames M. Hull
    • Kevin W. RuddAllan D. KniesDale C. MorrisJames M. Hull
    • G06F9/44
    • G06F9/30181G06F9/30072G06F9/30174
    • A processor comprising a feature indicator associated with at least one of a first sequence of one or more instructions, a first register, a second register, and an execution core is provided. The execution core is configured to execute a second instruction to cause the first register to be set to a first value using the feature indicator and to cause the second register to be set to a second value using the feature indicator. The execution core is configured to execute the first sequence of one or more instructions to cause a function to be performed in response to the first value in the first register indicating a true condition, and the execution core is configured to execute a second sequence of one or more instructions to cause the function to be performed in response to the second value in the second register indicating the true condition.
    • 提供了一种包括与一个或多个指令的第一序列,第一寄存器,第二寄存器和执行核心中的至少一个相关联的特征指示符的处理器。 执行核心被配置为执行第二指令,以使用特征指示器将第一寄存器设置为第一值,并且使用特征指示器将第二寄存器设置为第二值。 执行核心被配置为执行一个或多个指令的第一序列,以使得响应于第一寄存器中指示真实条件的第一值来执行功能,并且执行核心被配置为执行一个第二序列 或更多的指令,以响应于指示真实条件的第二寄存器中的第二值来执行功能。
    • 3. 发明授权
    • Method and apparatus for performing integer multiply operations using primitive multi-media operations that operate on smaller operands
    • 使用对较小操作数进行操作的原始多媒体操作来执行整数乘法运算的方法和装置
    • US06813627B2
    • 2004-11-02
    • US09920250
    • 2001-07-31
    • James M. HullDale C. Morris
    • James M. HullDale C. Morris
    • G06F752
    • G06F7/5324G06F2207/3828
    • Integer multiply operations using data stored in an integer register file are performed using multi-media primitive instructions that operate on smaller operands. The present invention performs a multiply operation on a 32-bit or 64-bit value by performing multiply operations on a series of smaller operands to form partial products, and adding the partial products together. Data manipulation instructions are used to reposition 16-bit segments of the 32-bit operands into positions that allow the multi-media parallel multiply instructions to compute partial products, and the partial products are then added together to form the result. In every embodiment, the present invention achieves better latencies than the prior art method of performing integer multiply operations provided by the IA-64 architecture.
    • 使用在较小的操作数上操作的多媒体原语指令来执行使用存储在整数寄存器文件中的数据的整数乘法运算。 本发明通过对一系列较小的操作数执行乘法运算来形成部分乘积,并且将部分乘积相加在一起,对32位或64位值进行乘法运算。 数据操作指令用于将32位操作数的16位段重新定位到允许多媒体并行乘法指令计算部分乘积的位置,然后将部分乘积相加在一起形成结果。 在每个实施例中,本发明实现了比由IA-64架构提供的执行整数乘法运算的现有技术方法更好的延迟。
    • 4. 发明授权
    • Privilege promotion based on check of previous privilege level
    • 基于先前特权级别检查的特权推广
    • US07680999B1
    • 2010-03-16
    • US09499720
    • 2000-02-08
    • Dale C. MorrisJames M. Hull
    • Dale C. MorrisJames M. Hull
    • G06F12/00G06F12/14
    • G06F9/468G06F9/30076
    • A secure promotion mechanism promotes a current privilege level of a processor in a computer system. The current privilege level controls application instruction execution in the computer system by controlling accessibility to system resources. An operating system performs a privilege promotion instruction, which is stored in a first page of memory not writeable by an application instructions at a first privilege level. The privilege promotion instruction reads a stored previous privilege level state, compares the read previous privilege level state to the current privilege level, and if the previous privilege level state is equal to or less privileged than the current privilege level, promotes the current privilege level to a second privilege level which is higher than the first privilege level.
    • 安全促销机制促进计算机系统中处理器的当前特权级别。 当前的权限级别通过控制系统资源的可访问性来控制计算机系统中的应用程序指令执行。 操作系统执行特权提升指令,该指令被存储在不能由第一特权级别的应用指令写入的存储器的第一页中。 特权提升指令读取存储的先前的权限级别状态,将读取的先前权限级别状态与当前权限级别进行比较,并且如果先前的权限级别状态等于或低于当前权限级别的权限,则将当前权限级别提升到 第二个权限级别高于第一个权限级别。