// Code generated by command: go run fe_amd64_asm.go -out ../fe_amd64.s -stubs ../fe_amd64.go -pkg field. DO NOT EDIT.

//go:build !purego

package field

// feMul sets out = a * b. It works like feMulGeneric.
//
//go:noescape
func feMul(out *Element, a *Element, b *Element)

// feSquare sets out = a * a. It works like feSquareGeneric.
//
//go:noescape

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

//go:build !amd64 || purego

package field

func feMul(v, x, y *Element) { feMulGeneric(v, x, y) }

	Store(r3lo, out.Field("l3"))
	Store(r4lo, out.Field("l4"))

	RET()
}

func feMul() {
	TEXT("feMul", NOSPLIT, "func(out, a, b *Element)")
	Doc("feMul sets out = a * b. It works like feMulGeneric.")
	Pragma("noescape")

	a := Dereference(Param("a"))
	a0 := namedComponent{a.Field("l0"), "a0"}
	a1 := namedComponent{a.Field("l1"), "a1"}
	a2 := namedComponent{a.Field("l2"), "a2"}

	return uint128{lo, hi}
}

// shiftRightBy51 returns a >> 51. a is assumed to be at most 115 bits.
func shiftRightBy51(a uint128) uint64 {
	return (a.hi << (64 - 51)) | (a.lo >> 51)
}

func feMulGeneric(v, a, b *Element) {
	a0 := a.l0
	a1 := a.l1
	a2 := a.l2
	a3 := a.l3
	a4 := a.l4

	b0 := b.l0
	b1 := b.l1
	b2 := b.l2
	b3 := b.l3
	b4 := b.l4

		t.Error(err)
	}
}

func TestFeMul(t *testing.T) {
	asmLikeGeneric := func(a, b Element) bool {
		a1 := a
		a2 := a
		b1 := b
		b2 := b

		feMulGeneric(&a1, &a1, &b1)
		feMul(&a2, &a2, &b2)

		if a1 != a2 || b1 != b2 {
			t.Logf("got: %#v,\nexpected: %#v", a1, a2)
			t.Logf("got: %#v,\nexpected: %#v", b1, b2)
		}

// after the first two lower 64 bit limb adds, but before either
// high 64 bit limbs are added.
//
// This is what happened on PPC64 when compiling
// crypto/internal/edwards25519/field.feMulGeneric.
func Add64MultipleChains(a, b, c, d [2]uint64) {
	var cx, d1, d2 uint64
	a1, a2 := a[0], a[1]
	b1, b2 := b[0], b[1]
	c1, c2 := c[0], c[1]

	// ppc64x: "ADDC\tR\\d+,", -"ADDE", -"MOVD\tXER"