pub unsafe extern "C" fn sp_dgemm(
transa: *mut c_char,
transb: *mut c_char,
m: c_int,
n: c_int,
k: c_int,
alpha: c_double,
A: *mut SuperMatrix,
b: *mut c_double,
ldb: c_int,
beta: c_double,
c: *mut c_double,
ldc: c_int,
) -> c_int