fieldElement((uint64(a) * R) % q) if m != exp { t.Fatalf("fieldToMontgomery(%d) = %d, expected %d", a, m, exp) } got := fieldFromMontgomery(m) if got != a { t.Fatalf("fieldFromMontgomery(fieldToMontgomery(%d)) = %d, expected %d", a, got, a) } } } func TestFieldAdd(t *testing.T) { t.Parallel() for _, a := range interestingValues() { for b := range fieldElement(q) { got := fieldAdd(a.m, b) exp := (a.m + b) % q if got != exp { t.Fatalf("%d + %d = %d, expected %d", a, b, got, exp) } } } } func TestFieldSub(t...