# Function core::arch::x86::_fxsave

1.27.0 · source ·

    pub unsafe fn _fxsave(mem_addr: *mut u8)

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

Saves the `x87` FPU, `MMX` technology, `XMM`, and `MXCSR` registers to the 512-byte-long 16-byte-aligned memory region `mem_addr`.

A misaligned destination operand raises a general-protection (#GP) or an alignment check exception (#AC).

See `FXSAVE` and `FXRSTOR`.

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