unsafe fn vec_vmsummbm(
a: vector_signed_char,
b: vector_unsigned_char,
c: vector_signed_int,
) -> vector_signed_intAvailable on (PowerPC or PowerPC-64) and target feature
altivec only.unsafe fn vec_vmsummbm(
a: vector_signed_char,
b: vector_unsigned_char,
c: vector_signed_int,
) -> vector_signed_intaltivec only.