Why is that? Couldn’t there be push_simd()/pop_simd() that the syscall itself us... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		kstrauser 65 days ago \| parent \| context \| favorite \| on: Jemalloc Postmortem Why is that? Couldn’t there be push_simd()/pop_simd() that the syscall itself uses around its SIMD calls? If no syscalls use SIMD today, I’d think we’re starting from a safe position.

durrrrrrrrrrrrr 65 days ago [–]

push_simd/pop_simd exist and are called kernel_fpu_begin/kernel_fpu_end. Their use is practically prohibited in most areas and iiuc not available on all archs, but it's available if needed.

kstrauser 65 days ago | [–]

Today I learned. Thanks!

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact