x86-64-v3

Architecture referenceFeex

x86-64-v3 na cumulative psABI feature level wey dey add AVX-era capabilities to x86-64-v2. Di operating system must enable di corresponding vector state, no be just say e dey present inside di CPU.

Wetin you need know

x86-64-v3 na cumulative psABI feature level wey dey add AVX-era capabilities to x86-64-v2. Di operating system must enable di corresponding vector state, no be just say e dey present inside di CPU.

How e dey work

Beyond v2, di level dey add AVX, AVX2, BMI1, BMI2, F16C, FMA, LZCNT, MOVBE, and OSXSAVE. Di psABI dey require full processor-manual availability checks, including di relevant XCR0 state. Dis na combination of requirements, no be just nickname for AVX2.

Where e dey useful

Binary wey dem compile with x86-64-v3 target fit use di whole level unconditionally. Library wey dem distribute broadly fit rather keep baseline build and select v3 implementation through im loader or runtime dispatcher.

How to check support and enablement

Check every inherited and newly added feature and verify AVX OS-state enablement with di architecture OSXSAVE/XGETBV sequence. No try repair missing hardware instruction by changing software package label.

Hardware capability, di running operating environment, and binary requirements of application na different layers. Make dem interpret architecture names and ABI levels as explicit contracts instead of general rule say newer dey always compatible.

Wetin di feature no dey guarantee

AVX2 alone no dey establish v3, and v3 no mean say AES-NI, AVX-512, or AMX dey. Container dey share host kernel instruction environment; e no dey manufacture missing instructions. VM fit expose compatible subset for migration purpose.

Compatibility and performance inside real life

Check di complete inherited requirements and di effective environment wey di process fit see. For VM, inspect di guest instead of assuming say e expose host model without changes. Supported fallback build suppose state im own baseline clearly.

Practical verification checklist

Record di exact processor or platform model plus di application, OS and runtime version dem wey dey involve. Make you keep di exact word dem wey di error or requirement use.
Check di manufacturer reference for dat exact model, den inspect di real capability and enabled state inside di environment where di program dey run.
Compare every single requirement of di binary or backend wey you choose. Name wey resemble am, alias, or broad technology label no reach.
Confirm say di application select di implementation wey dem intend. Use di diagnostics wey dem document and supported fallback if requirement dem no complete.
Make only one supported change at a time, den run di same workload again. Keep di original configuration and recovery way ready.

If dem list di feature but software no fit use am

Start from di exact component wey dey fail. Hardware database dey describe capability wey dem record; di operating system or hypervisor fit show different real environment. If illegal-instruction error happen, you still need to check di exact instruction wey cause di fault and di binary build, because corrupt file or anoda instruction wey no dey supported fit give di same kind problem.

Install di application, driver or runtime version wey get support for dat exact platform, and use di vendor documented baseline or fallback build if e need am. Software update no fit create instruction wey di processor no get. Firmware and security-policy change dem suppose follow di system manufacturer procedure and recovery plan, no be just any common optimization advice.

Sources and scope of dis explanation

x86-64 psABI: processor architecture and microarchitecture level dem · Intel 64 and IA-32 Architectures Software Developer's Manual · Linux kernel: using XSTATE features in user space

Dis reference dem establish architectural behavior and software requirement dem. Dem no dey independently verify every feature value for any linked hardware model page. For model support, use dat page manufacturer evidence and check di active system configuration. Dis article no supply benchmark, certification or independent review date.

Sources and verification

Editorial ownership: Feex. No independent review date dey recorded. How we dey do research.

x86-64 psABI: processor architecture and microarchitecture level dem · Machine Interface, Processor Architecture: baseline and cumulative v2/v3/v4 feature table, OS-state check dem and deployment recommendation dem.
Intel 64 and IA-32 Architectures Software Developer's Manual · Volume 1 and 2 describe di named instruction family dem and CPUID; Volume 3 describe state, paging, VMX and protection control dem. Architecture documentation no dey prove say particular model support am.
Linux kernel: using XSTATE features in user space · OS-enabled vector state, dynamically enabled tile state, signal-stack requirement dem and AMX permission flow. Linux-specific behavior no be promise for anoda OS.

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