pub unsafe fn sstein(
n: i32,
d: &[f32],
e: &[f32],
m: i32,
w: &[f32],
iblock: &[i32],
isplit: &[i32],
z: &mut [f32],
ldz: i32,
work: &mut [f32],
iwork: &mut [i32],
ifail: &mut [i32],
info: &mut i32,
)