pub unsafe extern "C" fn cblas_dsyr2k(
layout: CBLAS_LAYOUT,
uplo: CBLAS_UPLO,
trans: CBLAS_TRANSPOSE,
n: c_int,
k: c_int,
alpha: c_double,
a: *const c_double,
lda: c_int,
b: *const c_double,
ldb: c_int,
beta: c_double,
c: *mut c_double,
ldc: c_int,
)