公开(公告)号：US20180113708A1

公开(公告)日：2018-04-26

申请号：US15299420

申请日：2016-10-20

申请人： JESUS CORBAL ,  ROBERT VALENTINE ,  ROMAN S. DUBTSOV ,  NIKITA A. SHUSTROV ,  MARK J. CHARNEY ,  DENNIS R. BRADFORD ,  MILIND B. GIRKAR ,  EDWARD T. GROCHOWSKI ,  THOMAS D. FLETCHER ,  WARREN E. FERGUSON

发明人： JESUS CORBAL ,  ROBERT VALENTINE ,  ROMAN S. DUBTSOV ,  NIKITA A. SHUSTROV ,  MARK J. CHARNEY ,  DENNIS R. BRADFORD ,  MILIND B. GIRKAR ,  EDWARD T. GROCHOWSKI ,  THOMAS D. FLETCHER ,  WARREN E. FERGUSON

IPC分类号： G06F9/30 ,  G06F7/544

CPC分类号： G06F9/3001 ,  G06F7/483 ,  G06F7/5443 ,  G06F9/30036 ,  G06F9/30109 ,  G06F9/30112 ,  G06F9/3016

摘要： Embodiments of systems, apparatuses, and methods for chained fused multiply add. In some embodiments, an apparatus includes a decoder to decode a single instruction having an opcode, a destination field representing a destination operand, a first source field representing a plurality of packed data source operands of a first type that have packed data elements of a first size, a second source field representing a plurality of packed data source operands that have packed data elements of a second size, and a field for a memory location that stores a scalar value. A register file having a plurality of packed data registers includes registers for the plurality of packed data source operands that have packed data elements of a first size, the source operands that have packed data elements of a second size, and the destination operand. Execution circuitry executes the decoded single instruction to perform iterations of packed fused multiply accumulate operations by multiplying packed data elements of the sources of the first type by sub-elements of the scalar value, and adding results of these multiplications to an initial value in a first iteration and a result from a previous iteration in subsequent iterations.