1.27.0[][src]Function core::arch::x86_64::_xsaveopt

pub unsafe fn _xsaveopt(mem_addr: *mut u8, save_mask: u64)
This is supported on x86-64 and target feature xsave,xsaveopt only.

Perform a full or partial save of the enabled processor states to memory at mem_addr.

State is saved based on bits [62:0] in save_mask and XCR0. mem_addr must be aligned on a 64-byte boundary. The hardware may optimize the manner in which data is saved. The performance of this instruction will be equal to or better than using the XSAVE instruction.

Intel's documentation