#[cfg(test)]
use stdsimd_test::assert_instr;
#[allow(improper_ctypes)]
extern "C" {
#[link_name = "llvm.x86.fxsave"]
fn fxsave(p: *mut u8) -> ();
#[link_name = "llvm.x86.fxrstor"]
fn fxrstor(p: *const u8) -> ();
}
#[inline]
#[target_feature(enable = "fxsr")]
#[cfg_attr(test, assert_instr(fxsave))]
#[stable(feature = "simd_x86", since = "1.27.0")]
pub unsafe fn _fxsave(mem_addr: *mut u8) {
fxsave(mem_addr)
}
#[inline]
#[target_feature(enable = "fxsr")]
#[cfg_attr(test, assert_instr(fxrstor))]
#[stable(feature = "simd_x86", since = "1.27.0")]
pub unsafe fn _fxrstor(mem_addr: *const u8) {
fxrstor(mem_addr)
}
#[cfg(test)]
mod tests {
use coresimd::x86::*;
use std::{cmp::PartialEq, fmt};
use stdsimd_test::simd_test;
#[repr(align(16))]
struct FxsaveArea {
data: [u8; 512], }
impl FxsaveArea {
fn new() -> FxsaveArea {
FxsaveArea { data: [0; 512] }
}
fn ptr(&mut self) -> *mut u8 {
&mut self.data[0] as *mut _ as *mut u8
}
}
impl PartialEq<FxsaveArea> for FxsaveArea {
fn eq(&self, other: &FxsaveArea) -> bool {
for i in 0..self.data.len() {
if self.data[i] != other.data[i] {
return false;
}
}
true
}
}
impl fmt::Debug for FxsaveArea {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "[")?;
for i in 0..self.data.len() {
write!(f, "{}", self.data[i])?;
if i != self.data.len() - 1 {
write!(f, ", ")?;
}
}
write!(f, "]")
}
}
#[simd_test(enable = "fxsr")]
unsafe fn fxsave() {
let mut a = FxsaveArea::new();
let mut b = FxsaveArea::new();
fxsr::_fxsave(a.ptr());
fxsr::_fxrstor(a.ptr());
fxsr::_fxsave(b.ptr());
assert_eq!(a, b);
}
}