公开(公告)号：US20190042253A1

公开(公告)日：2019-02-07

申请号：US15665781

申请日：2017-08-01

Applicant: ARM Limited

Inventor： Mbou EYOLE ,  Jesse Garrett BEU ,  Alejandro Martinez VICENTE ,  Timothy HAYES

IPC: G06F9/30

Abstract: An apparatus and method of operating the apparatus are provided for performing a count operation. Instruction decoder circuitry is responsive to a count instruction specifying an input data item to generate control signals to control the data processing circuitry to perform a count operation. The count operation determines a count value indicative of a number of input elements of a subset of elements in the specified input data item which have a value which matches a reference value in a reference element in a reference data item. A plurality of count operations may be performed to determine a count data item corresponding to the input data item. A register scatter storage instruction, a gather index generation instruction, and respective apparatuses responsive to them, as well as simulator implementations, are also provided.

公开(公告)号：US20190042190A1

公开(公告)日：2019-02-07

申请号：US15665715

申请日：2017-08-01

Applicant: ARM Limited

Inventor： Alejandro Martinez VICENTE ,  Jesse Garrett BEU ,  Mbou EYOLE ,  Timothy HAYES

IPC: G06F7/02 ,  G06F9/30

Abstract: An apparatus and a method of operating the apparatus are provided for performing a comparison operation to match a given sequence of values within an input vector. Instruction decoder circuitry is responsive to a string match instruction specifying a segment of an input vector to generate control signals to control the data processing circuitry to perform a comparison operation. The comparison operation determines a comparison value indicative of whether each input element of a required set of consecutive input elements of the segment has a value which matches a respective value in consecutive reference elements of the reference data item. A plurality of comparison operations may be performed to determine a match vector corresponding to the segment of the input vector to indicate the start position of the substring in the input vector. A string match instruction, as well as simulator virtual machine implementations, are also provided.