# Function core::arch::x86_64::_fxrstor64

1.27.0 · source ·

    pub unsafe fn _fxrstor64(mem_addr: *const u8)

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

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

The contents of this memory region should have been written to by a previous `_fxsave` or `_fxsave64` intrinsic.

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

See `FXSAVE` and `FXRSTOR`.

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