首页>
外国专利>
Single-instruction multiple-data vector permutation instruction and method for performing table lookups for in-range index values and determining constant values for out-of-range index values
Single-instruction multiple-data vector permutation instruction and method for performing table lookups for in-range index values and determining constant values for out-of-range index values
展开▼
机译：用于对范围内的索引值执行表查找并为范围外的索引值确定常数的单指令多数据向量置换指令和方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A processor in a data processing system executes a permutation instruction which identifies a first source register, at least one other source register, and a destination register. The first source register stores at least one in-range index value for the at least one other source register and at least one out-of-range index value for the at least one other source register. The at least one other source register stores a plurality of vector element values, wherein each in-range index value indicates which vector element value of the at least one other source register is to be stored into a corresponding vector element of the destination register. Each out-of-range index value is used to indicate which one of at least two predetermined constant values is to be stored into a corresponding vector element of the destination register. Partial table lookups using a permutation instruction shortens the time required to retrieve data.
展开▼
