Linaro GCC

Make SLP try different vector widths

Registered by Richard Sandiford

At the moment, SLP only tries one vector width. For NEON, if the default
choice of quad width is too wide, it would be better to try doubles instead.

E.g., put-h264-chroma-mc8-8 has groups of 8 8-bit elements, which requires the use of double-word vectors.

Blueprint information

Status:
Complete
Approver:
Michael Hope
Priority:
Medium
Drafter:
Richard Sandiford
Direction:
Approved
Assignee:
Ira Rosen
Definition:
Approved
Series goal:
Accepted for 4.6
Implementation:
Implemented
Milestone target:
milestone icon 4.6-2011.10
Started by
Michael Hope
Completed by
Michael Hope

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Headline: Improve performance by automatically choosing the best NEON vector width when vectorising straight line code
Acceptance: https://wiki.linaro.org/WorkingGroups/ToolChain/std-performance-acceptance

[michaelh1 2011-09-20] nits: guessed and marked as 'Started' as Ira has put it in her queue. Milestone of 'None' is correct as the landing date is unknown.

(?)

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