Virtualizing ARM VFP (Vector Floating-Point) with Xen-ARM

Seehwan Yoo, Sung Bae Yoo, Chuck Yoo

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


VFP is a Vector Floating-Point unit in ARM processors. It enables ARM processors to handle auxiliary floating-point operations with hardware, which has become an essential part for performance in recent mobile devices. However, mobile virtualization such as Xen-ARM does not support virtual VFP, so floating point operations are very slow in mobile virtual machine. To overcome the performance limitation of floating-point operations in Xen-ARM virtualization, this paper presents a new virtual VFP so that applications can take the advantage of VFP hardware. With our virtual VFP, Xen-Linux reduces floating point operation latency up to one eighth from the existing software emulation version. In addition, result from mibench with virtual VFP presents 3-4 times higher throughput than that from software emulation. Furthermore, virtual VFP reduces code sizes and enhances power-efficiency.

Original languageEnglish
Pages (from-to)1266-1276
Number of pages11
JournalJournal of Systems Architecture
Issue number10 PART D
Publication statusPublished - 2013


  • Performance
  • Vector Floating-Point
  • Virtual machine

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture


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