Instructions for dual destination type conversion, mixed precision accumulation, and mixed precision atomic memory operations

A method of executing an instruction, the method comprising:

• fetching the instruction from a code storage, the instruction comprising an opcode, a first destination identifier, and a source identifier to specify a source vector register comprising a plurality of single precision floating point data elements;
• decoding the fetched instruction by a decode circuit;
• and
• executing, by an execution circuit, the decoded instruction to:
• convert the elements of the source vector register into double precision floating point values, store a first half of the double precision floating point values to a first location identified by the first destination identifier, and store a second half of the double precision values to a second location.

An apparatus for executing an instruction, the apparatus comprising:

• means for fetching an instruction, the means for fetching to fetch the instruction from a code storage, the instruction comprising an opcode, a first destination identifier, and a source identifier to specify a source vector register, the source vector register comprising a plurality of single precision floating point data elements;
• means for decoding to decode the fetched instruction;
• and
• means for executing the decoded instruction to:
• convert the elements of the source vector register into double precision floating point values, store a first half of the double precision floating point values to a first location identified by the first destination identifier, and store a second half of the double precision floating point values to a second location.