# Function core::arch::x86_64::_xsavec

1.27.0 · source · [−]

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

Available on (x86 or x86-64) and target feature `xsave,xsavec` and x86-64 only.
Expand description

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

`xsavec` differs from `xsave` in that it uses compaction and that it may use init optimization. State is saved based on bits `[62:0]` in `save_mask` and `XCR0`. `mem_addr` must be aligned on a 64-byte boundary.

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