Permute operations with flexible zero control

摘要

In one embodiment, the present invention includes logic to receive a permute instruction, first and second source operands, and control values, and to perform a permute operation based on an operation between at least two of the control values so that selected portions of the first and second source operands or a predetermined value can be stored into elements of a destination. Multiple permute instructions may be combined to perform efficient table lookups. Other embodiments are described and claimed.

主权项

1. A processor comprising:
a cache memory; and logic to:
receive a permute instruction and, included with the permute instruction, first and second source operands, a first control value, and a second control value, the first and second control values separate from the first and second source operands, the logic to perform a permute operation responsive thereto, wherein the logic is to select a portion of the first source operand or the second source operand directly based on a value of a second portion of the first control value; andstore the selected portion of the first or second source operand or a zero value in a destination location based on whether a first portion of the first control value matches at least a portion of the second control value.