Methods and apparatus for calculating Single-Instruction-Multiple-Data (SIMD) complex arithmetic. A coprocessor instruction has a format identifying a multiply and subtract instruction to generate real components for complex multiplication of first operand complex data and corresponding second operand...http://www.google.ca/patents/US7392368?utm_source=gb-gplus-sharePatent US7392368 - Cross multiply and add instruction and multiply and subtract instruction SIMD execution on real and imaginary components of a plurality of complex data elements
