func RandomTree(nbits uint) (m1 arith.Model, desc string) {
x1 := arith.Shift2{
P0: arith.P(rand.Intn(arith.MaxP / 2)),
I0: byte(rand.Intn(8) + 1),
P1: arith.P(rand.Intn(arith.MaxP / 2)),
I1: byte(rand.Intn(8) + 1),
}
m1 = arith.NewTree(nbits, func() arith.Model {
x := x1
return &x
})
desc = fmt.Sprintf("%#v", x1)
return
}
func RandomModel() (m1, m2 arith.Model, desc string) {
switch rand.Intn(1) {
case 0:
x1 := arith.Shift2{
P0: arith.P(rand.Intn(arith.MaxP / 2)),
I0: byte(rand.Intn(8) + 1),
P1: arith.P(rand.Intn(arith.MaxP / 2)),
I1: byte(rand.Intn(8) + 1),
}
x2 := x1
m1, m2 = &x1, &x2
case 1:
x1 := arith.Shift4{
P: [4]arith.P{
arith.P(rand.Intn(arith.MaxP / 4)),
arith.P(rand.Intn(arith.MaxP / 4)),
arith.P(rand.Intn(arith.MaxP / 4)),
arith.P(rand.Intn(arith.MaxP / 4)),
},
I: [4]byte{
byte(rand.Intn(7) + 1),
byte(rand.Intn(7) + 1),
byte(rand.Intn(7) + 1),
byte(rand.Intn(7) + 1),
},
}
x2 := x1
m1, m2 = &x1, &x2
}
desc = fmt.Sprintf("%#v", m1)
return
}