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Mon, 3 Jun 2024 11:49:38 +0000 From: Richard Earnshaw To: CC: , Richard Earnshaw Subject: [PATCH 03/11] arm: default to softvfp on armv6 or later cores Date: Mon, 3 Jun 2024 12:49:04 +0100 Message-ID: <20240603114912.4065598-4-rearnsha@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240603114912.4065598-1-rearnsha@arm.com> References: <20240603114912.4065598-1-rearnsha@arm.com> MIME-Version: 1.0 X-EOPAttributedMessage: 1 X-MS-TrafficTypeDiagnostic: AMS0EPF000001AA:EE_|GVXPR08MB10688:EE_|DU2PEPF00028D13:EE_|AS8PR08MB8351:EE_ X-MS-Office365-Filtering-Correlation-Id: 981f365b-7c26-48e4-221a-08dc83c3473b X-LD-Processed: f34e5979-57d9-4aaa-ad4d-b122a662184d,ExtAddr x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; ARA:13230031|82310400017|36860700004|376005|1800799015; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:40.67.248.234; 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CTRY:IE; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:64aa7808-outbound-1.mta.getcheckrecipient.com; PTR:ec2-63-35-35-123.eu-west-1.compute.amazonaws.com; CAT:NONE; SFS:(13230031)(82310400017)(36860700004)(376005)(35042699013)(1800799015); DIR:OUT; SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jun 2024 11:49:51.6686 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 981f365b-7c26-48e4-221a-08dc83c3473b 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: DU2PEPF00028D13.eurprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR08MB8351 X-Spam-Status: No, score=-13.3 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FORGED_SPF_HELO, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_PASS, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE, UNPARSEABLE_RELAY, UPPERCASE_50_75 autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: binutils@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Binutils mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: binutils-bounces+patchwork=sourceware.org@sourceware.org From armv6 onwards a lot of cores started to come with a physical VFP implementation; but many still did not and in some cases there are both variants. For the cores that lacked a physical VFP we would fall back to FPU_NONE if the platform/ABI did not mandate something else. To make matters worse, FPU_NONE is internal state used to imply soft-fpa (ie a mixed-endian double format), so any use of .double in hand-written assembly is almost certainly generating incorrect output. That's undesirable, all these cores should really default to a softvfp model. --- gas/config/tc-arm.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c index 12e8f7cfc84..8452ea17a02 100644 --- a/gas/config/tc-arm.c +++ b/gas/config/tc-arm.c @@ -31458,10 +31458,10 @@ static const struct arm_cpu_option_table arm_cpus[] = FPU_ARCH_VFP_V2), ARM_CPU_OPT ("arm1136js", "ARM1136J-S", ARM_ARCH_V6, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("arm1136j-s", NULL, ARM_ARCH_V6, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("arm1136jfs", "ARM1136JF-S", ARM_ARCH_V6, ARM_ARCH_NONE, FPU_ARCH_VFP_V2), @@ -31473,22 +31473,22 @@ static const struct arm_cpu_option_table arm_cpus[] = FPU_ARCH_VFP_V2), ARM_CPU_OPT ("mpcorenovfp", "MPCore", ARM_ARCH_V6K, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("arm1156t2-s", NULL, ARM_ARCH_V6T2, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("arm1156t2f-s", NULL, ARM_ARCH_V6T2, ARM_ARCH_NONE, FPU_ARCH_VFP_V2), ARM_CPU_OPT ("arm1176jz-s", NULL, ARM_ARCH_V6KZ, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("arm1176jzf-s", NULL, ARM_ARCH_V6KZ, ARM_ARCH_NONE, FPU_ARCH_VFP_V2), ARM_CPU_OPT ("cortex-a5", "Cortex-A5", ARM_ARCH_V7A, ARM_FEATURE_CORE_LOW (ARM_EXT_MP | ARM_EXT_SEC), - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("cortex-a7", "Cortex-A7", ARM_ARCH_V7VE, ARM_ARCH_NONE, FPU_ARCH_NEON_VFP_V4), @@ -31559,13 +31559,13 @@ static const struct arm_cpu_option_table arm_cpus[] = FPU_ARCH_CRYPTO_NEON_VFP_ARMV8_DOTPROD), ARM_CPU_OPT ("cortex-r4", "Cortex-R4", ARM_ARCH_V7R, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("cortex-r4f", "Cortex-R4F", ARM_ARCH_V7R, ARM_ARCH_NONE, FPU_ARCH_VFP_V3D16), ARM_CPU_OPT ("cortex-r5", "Cortex-R5", ARM_ARCH_V7R, ARM_FEATURE_CORE_LOW (ARM_EXT_ADIV), - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("cortex-r7", "Cortex-R7", ARM_ARCH_V7R, ARM_FEATURE_CORE_LOW (ARM_EXT_ADIV), FPU_ARCH_VFP_V3D16), @@ -31580,31 +31580,31 @@ static const struct arm_cpu_option_table arm_cpus[] = FPU_ARCH_NEON_VFP_ARMV8), ARM_CPU_OPT ("cortex-m35p", "Cortex-M35P", ARM_ARCH_V8M_MAIN, ARM_FEATURE_CORE_LOW (ARM_EXT_V5ExP | ARM_EXT_V6_DSP), - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("cortex-m33", "Cortex-M33", ARM_ARCH_V8M_MAIN, ARM_FEATURE_CORE_LOW (ARM_EXT_V5ExP | ARM_EXT_V6_DSP), - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("cortex-m23", "Cortex-M23", ARM_ARCH_V8M_BASE, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("cortex-m7", "Cortex-M7", ARM_ARCH_V7EM, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("cortex-m4", "Cortex-M4", ARM_ARCH_V7EM, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("cortex-m3", "Cortex-M3", ARM_ARCH_V7M, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("cortex-m1", "Cortex-M1", ARM_ARCH_V6SM, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("cortex-m0", "Cortex-M0", ARM_ARCH_V6SM, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("cortex-m0plus", "Cortex-M0+", ARM_ARCH_V6SM, ARM_ARCH_NONE, - FPU_NONE), + FPU_ARCH_SOFTVFP), ARM_CPU_OPT ("cortex-x1", "Cortex-X1", ARM_ARCH_V8_2A, ARM_FEATURE_CORE_HIGH (ARM_EXT2_FP16_INST | ARM_EXT2_SB), FPU_ARCH_DOTPROD_NEON_VFP_ARMV8),