_fxsave64 in core::arch::x86_64 - Rust
Description: Saves the `x87` FPU, `MMX` technology, `XMM`, and `MXCSR` registers to the 512-byte-long 16-byte-aligned memory region `mem_addr`.

## _fxsave64

# Function _fxsave64

1.27.0 · Source

    pub unsafe fn _fxsave64(mem_addr: *mut u8)

Available on 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`.

Intel’s documentation