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Mon, 3 Jun 2024 15:15:14 +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 16:14:58 +0100 Message-ID: <20240603151506.27126-4-rearnsha@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240603151506.27126-1-rearnsha@arm.com> References: <20240603151506.27126-1-rearnsha@arm.com> MIME-Version: 1.0 X-EOPAttributedMessage: 1 X-MS-TrafficTypeDiagnostic: DU2PEPF00028D0E:EE_|DBBPR08MB5882:EE_|DU2PEPF00028CFF:EE_|PAWPR08MB10947:EE_ X-MS-Office365-Filtering-Correlation-Id: 727a85ac-9448-430a-b903-08dc83e000e1 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|376005|36860700004|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)(1800799015)(376005)(36860700004)(35042699013)(82310400017); DIR:OUT; SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jun 2024 15:15:29.0161 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 727a85ac-9448-430a-b903-08dc83e000e1 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: DU2PEPF00028CFF.eurprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAWPR08MB10947 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, 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),