[llvm-commits] LLVM patch to support ARM fused multiply add/subtract instructions

Anton Korobeynikov anton at korobeynikov.info
Sun Jan 22 04:12:14 PST 2012

Hi Ana,

Comitted as r148658.

> Some ARMv7-A processor implementations  (e.g, Qualcomm 8960, ARM Cortex-A5)
> support fused multiply add/subtract instructions (VFMA/VFMS) which have
> lower latency and greater accuracy than the chained multiply add/subtract
> instructions (VMLA/VMLS).
Just curious - what are the performance / accuracy wins for fma stuff here?

With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University

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