5 ms·
No, debian requires ARMv8.0-A + FP + NEON, as those are optinal extensions (even optional in ARMv9.0-A)
by camel-cdr 1mo ago
No, debian requires ARMv8.0-A + FP + NEON, as those are optinal extensions (even optional in ARMv9.0-A)
- brucehoult 1mo agoSVE2 is compulsory in ARMv9-A, but NEON is optional?
- camel-cdr 1mo agohttps://support.arm.com/documentation/109697/2026_06/Feature-descriptions/The-Armv9-0-architecture-extension https://support.arm.com/documentation/109697/2026_06/Feature... > In an Armv9.0 implementation, if FEAT_FP and FEAT_AdvSIMD are implemented, the following features are implemented: ... This implies they don't have to be implemented. https://support.arm.com/documentation/109697/2026_06/Feature-descriptions/The-Armv8-0-architecture-extension https://support.arm.com/documentation/109697/2026_06/Feature... > FEAT_FP is OPTIONAL from Armv8.0. > FEAT_AdvSIMD is OPTIONAL from Armv8.0. But also: > All Armv8-A systems that support standard operating systems with rich application environments also provide hardware support for Advanced SIMD instructions. and > All Armv8-A systems that support standard operating systems with rich application environments provide hardware support for Advanced SIMD and floating-point instructions. All Armv9-A systems that support standard operating systems with rich application environments also provide hardware support for SVE2 instructions. It is a requirement of the ARM Procedure Call Standard for AArch64, see Procedure Call Standard for the Arm 64-bit Architecture So, both FEAT_FP and FEAT_AdvSIMD are optional for Armv9-A and Armv8-A. But both are mandated in cores for "rich operating systems", which basically means it's mandated by the OS. Also, Armv9-A on OS level mandates SVE2.