law scratch_and_alu

bend-osdev-bpf@0.1.0.0 · LAWS.bend:207

import Base
import bend-osdev-bpf@0.1.0.0/insn.bend as I
import bend-osdev-bpf@0.1.0.0/bpf.bend as R

207# M[15] = 5; X = 3; A = M[15] * X = 15; M[0] = X; X = M[15]; A = -(A - X)
208law scratch_and_alu:
209  {R.bpf_run(R.bpf_packet(pkt_rarp()), [I.BpfLdImm{5}, I.BpfSt{15}, I.BpfLdxImm{3}, I.BpfLdMem{15}, I.BpfAlu{I.BpfMul{}, I.BpfX{}}, I.BpfStx{0}, I.BpfLdxMem{15}, I.BpfAlu{I.BpfSub{}, I.BpfX{}}, I.BpfNeg{}, I.BpfRet{I.BpfRetA{}}]) == Done{4294967286} : Result<&2, &2, I.BpfError, U32>}