http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52941
Bug #: 52941
Summary: SH Target: Add support for movco.l / movli.l atomics
on SH4A
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: olege...@gcc.gnu.org
CC: kkoj...@gcc.gnu.org
Target: sh4a-*-*
I could do that, however I'm not sure when the movco/movli atomics should be
enabled. We've got the '-msoft-atomic' option, which enables the GNU/Linux
gUSA atomics. The movco/movli atomics would actually be compatible with a gUSA
enabled kernel (at least on a single-core system). However, I'm not sure
whether -msoft-atomic should enable movco/movli atomics on SH4A or not.
Other than that, should we add another option '-mhard-atomic' (which would
enable the movco/movli atomics on SH4A and disable all atomic insns for
non-SH4A)?
Actually, I think the options should be '-msp-atomic' and '-mmp-atomic', where
'-msp-atomic' would be the current '-msoft-atomic'.
Kaz, what do you think?
