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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 May 2024 13:05:20.3915 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4dc04a92-75f5-4fc7-cdb2-08dc7996ab37 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: AM1PEPF000252DE.eurprd07.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DU2PR08MB10301 X-Spam-Status: No, score=-5.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO,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 5/21/2024 1:33 PM, Saurabh Jha wrote: > Introduces instructions for the SVE2 lut extension for AArch64. They are > documented in the following links: > * luti2: > https://developer.arm.com/documentation/ddi0602/2024-03/SVE-Instructions/LUTI2--Lookup-table-read-with-2-bit-indices-?lang=en > * luti4: > https://developer.arm.com/documentation/ddi0602/2024-03/SVE-Instructions/LUTI4--Lookup-table-read-with-4-bit-indices-?lang=en > > These instructions use new SVE2 vector operands. They are called > SVE_Zm1_23_INDEX, SVE_Zm2_22_INDEX, and Zm3_12_INDEX and they have > 1 bit, 2 bit, and 3 bit indices respectively. > > For these new operands, we defined a new inserter and a new extractor. > > The lsb and width of these new operands are the same as many existing > operands but the convention is to give different names to fields that > serve different purpose so we introduced new fields in aarch64-opc.c > and aarch64-opc.h. > > We made a design choice for the second operand of the halfword variant of > luti4 with two register tables. We could have either defined a new operand, > like SVE_Znx2, or we could have use the existing operand SVE_ZnxN. With > the new operand, we would need to implement constraints on register > lists based on either operand or opcode flag. With existing operand, we > could just existing constraint checks using opcode flag. We chose > the second approach and went with SVE_ZnxN and added opcode flag to > enforce lengths of vector register list operands. This way, we can reuse > the existing constraint check logic. > --- > Hi, > > Regression tested for aarch64-none-elf and found no regressions. > > Ok for binutils-master? I don't have commit access so can someone please > commit on my behalf? > > Regards, > Saurabh Unfortunately, I missed a failing test case in this patch of the series. I have sent a new patch series and the patch corresponding to this one is here: https://sourceware.org/pipermail/binutils/2024-May/134198.html