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From: "mx682x at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/110217] New: [avr] SREG: use BSET and BCLR instead of
 load/modify/write
Date: Mon, 12 Jun 2023 09:23:02 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110217

            Bug ID: 110217
           Summary: [avr] SREG: use BSET and BCLR instead of
                    load/modify/write
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mx682x at gmail dot com
  Target Milestone: ---

Created attachment 55306
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D55306&action=3Dedit
patch file for gcc 13.1

Hello.

I'd like to suggest a patch that makes the compiler use bset and bclr
instructions when doing SREG &=3D 0x80 (or ~0x80) or similr. Right now, all
versions, as far as I know, are using in/andi(ori)/out instructions to chan=
ge
the SREG.=