Itanium's new basic operation of fused multiply-add: theoretical explanation and theoretical challenge

Authors:
Vladik Kreinovich
Affiliations:
University of Texas at El Paso, El Paso, TX
Venue:
ACM SIGACT News
Year:
2001

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Abstract

A new Intel's 64-bit chip Itanium has a new instruction set which includes a fused multiply-add instruction x1 + x2 · x3 (see, e.g., [7]). In this short article, we explain the empirical reasons behind the choice of this instruction, give possible theoretical explanation for this choice, and mention a related theoretical challenge.