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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Oct 2022 10:45:07.0701 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 058d626b-a258-41fb-b86f-08dab02ca814 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: AM7EUR03FT004.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR08MB10241 X-Spam-Status: No, score=-6.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,FORGED_SPF_HELO,KAM_DMARC_NONE,NICE_REPLY_A,RCVD_IN_DNSWL_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 10/14/22 19:11, Pedro Alves wrote: > Hi! > > Zoran and I found a potential need for an integer type with precision of 64-bit + 8-bit, in order to > store bit offsets that can span a whole 64-bits address space. Instead of rolling our own, > I guess it makes sense to use libgmp, since, well, we already depend on it. I see that we have: Is uint128_t an option (at least temporarily)? > > /* A class to make it easier to use GMP's mpz_t values within GDB. */ > > struct gdb_mpz > { > > In gdb/gmp-utils.h. However, we need do to arithmetic on the type, and this wrapper > type doesn't implement operator+, operator-, etc, etc. I guess we could add those, > as wrappers around mpz_add, etc. Or use raw mpz_add, etc. directly. However, I just found > out that GMP already has its own C++ interface: > > https://gmplib.org/manual/C_002b_002b-Interface-General > > Before we explore this further, is there an already known reason we shouldn't be using > that interface? > > Pedro Alves