// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package fiat_test

import (
	"crypto/internal/nistec/fiat"
	"testing"
)

func BenchmarkMul(b *testing.B) {
	b.Run("P224", func(b *testing.B) {
		v := new(fiat.P224Element).One()
		b.ReportAllocs()
		b.ResetTimer()
		for i := 0; i < b.N; i++ {
			v.Mul(v, v)
		}
	})

	}
	if maxSqr != 0 {
		fmt.Printf("found karatsubaSqrThreshold = %d\n", maxSqr)
	} else {
		fmt.Println("no karatsubaSqrThreshold found")
	}
}

func karatsubaLoad(b *testing.B) {
	BenchmarkMul(b)
}

// measureKaratsuba returns the time to run a Karatsuba-relevant benchmark
// given Karatsuba threshold th.
func measureKaratsuba(th int) time.Duration {
	th, karatsubaThreshold = karatsubaThreshold, th

}

// rndNat1 is like rndNat but the result is guaranteed to be > 0.
func rndNat1(n int) nat {
	x := nat(rndV(n)).norm()
	if len(x) == 0 {
		x.setWord(1)
	}
	return x
}

func BenchmarkMul(b *testing.B) {
	mulx := rndNat(1e4)
	muly := rndNat(1e4)
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		var z nat
		z.mul(mulx, muly)
	}
}

func benchmarkNatMul(b *testing.B, nwords int) {

		z0, c = Sub64(z0, uint64(i), c)
		z1, c = Sub64(z1, uint64(i), c)
		z2, c = Sub64(z2, uint64(i), c)
		z3, _ = Sub64(z3, uint64(i), c)
	}
	Output = int(z0 + z1 + z2 + z3)
}

func BenchmarkMul(b *testing.B) {
	var hi, lo uint
	for i := 0; i < b.N; i++ {
		hi, lo = Mul(uint(Input), uint(i))
	}
	Output = int(hi + lo)
}

func BenchmarkMul32(b *testing.B) {
	var hi, lo uint32