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[Bug target/79105] New: Autovectorized NEON code slower than vfpv4 on Cortex A5
- From: "tulipawn at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 16 Jan 2017 18:10:30 +0000
- Subject: [Bug target/79105] New: Autovectorized NEON code slower than vfpv4 on Cortex A5
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79105
Bug ID: 79105
Summary: Autovectorized NEON code slower than vfpv4 on Cortex
A5
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: tulipawn at gmail dot com
Target Milestone: ---
As the title says, many results seem to suffer from switching to -mfpu=neon,
etc.
http://openbenchmarking.org/result/1701165-TA-1701143TA78
Could anyone explain the abnormally small difference between armv7 and aarch64
in OpenSSL?