https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94154
Bug ID: 94154
Summary: AArch64: Add parameters to tune the precision of
reciprocal div
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: patch
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: bule1 at huawei dot com
CC: richard.sandiford at arm dot com
Target Milestone: ---
Target: AARCH64
This report suggest to use parameters to control the number of newton
iterations when using the reciprocal division on aarch64 platform, which is
currently hard coded in aarch64.c.
This can benefit some test cases in spec2017 fpspeed in peak mode that do not
have a high demand on precision. And also fix the downside that users are
forced to use reciprocal approximation at low precision.
A proposed patch is attached.
