# Function core::arch::x86_64::_xsave64 1.27.0[−][src]

    pub unsafe fn _xsave64(mem_addr: *mut u8, save_mask: u64)

This is supported on x86-64 and target feature `xsave` 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 format of the XSAVE area is detailed in Section 13.4, “XSAVE Area,” of Intel® 64 and IA-32 Architectures Software Developer’s Manual, Volume 1.

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