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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Apr 2024 08:01:57.6466 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: de336b17-d0a2-41cd-5fd9-08dc59347e9e X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: AMS0EPF000001AC.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB6278 X-Spam-Status: No, score=-5.6 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,FORGED_SPF_HELO,KAM_DMARC_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE,TXREP,UNPARSEABLE_RELAY autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On 4/10/24 08:03, Sébastien Michelland wrote: > Hi Luis, > >> This looks OK to me. Unfortunately it doesn't look like we have >> an active maintainer for SH, so testing might be a bit limited. >> >> Sounds like Simon had already OK-ed your approach. In any case, >> are you sure all the GPR's should also be typed as data pointer? > > I'm not sure I understand; the only GPR that I make a data pointer is r15 (the stack pointer). The others remain signed int. Ah, sorry. I misread the code as handling all GPR's until 15. So you can ignore my comment. > > If you mean gbr then its only use (besides reading/writing it directly) is as the base for the so-called global addressing modes: > > mov.{b,w,l} @(disp, gbr), r0    # r0 = *(gbr + disp) > mov.{b,w,l} r0, @(disp, gbr)    # *(gbr + disp) = r0 > > As the displacements have a very limited range, this requires gbr to be a pointer. My understanding is that it's intended for global pointers such as the thread pointer or GOT (for which there is no reserved register on SH). Indeed. > > Sébastien