def ckp.sumv

bend-osdev-acpi@0.1.2.0 · PROOF_checksum.bend:162

import Base
import bend-osdev-bytes@0.1.1.1/bytes.bend as B
import bend-osdev-u32@0.1.0.0/u32.bend as U
import bend-osdev-acpi@0.1.2.0/checksum.bend as C

162def ckp.sumv(+o: B.Octets) -> {U32.to_nat(C.AcpiChecksum.sum(o)) == U.U32Nat.low(8n, ckp.ns(B.Octets.to_list(o))) : Nat}:
163  %Equal.sym(Nat, U32.to_nat(U32.and(255, C.ck.sum.go(B.Octets.to_list(o), 0))), U.U32Nat.low(8n, U32.to_nat(C.ck.sum.go(B.Octets.to_list(o), 0))), ckp.am(C.ck.sum.go(B.Octets.to_list(o), 0))) : {_ == U.U32Nat.low(8n, ckp.ns(B.Octets.to_list(o))) : Nat}
164  ckp.go(B.Octets.to_list(o), 0)