You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: curve25519.go
    path of file: ./repos/malice/vendor/golang.org/x/crypto/curve25519
    
    the code of the file until where you have to start completion: // Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// We have an implementation in amd64 assembly so this code is only run on
// non-amd64 platforms. The amd64 assembly does not support gccgo.
// +build !amd64 gccgo appengine

package curve25519

import (
	"encoding/binary"
)

// This code is a port of the public domain, "ref10" implementation of
// curve25519 from SUPERCOP 20130419 by D. J. Bernstein.

// fieldElement represents an element of the field GF(2^255 - 19). An element
// t, entries t[0]...t[9], represents the integer t[0]+2^26 t[1]+2^51 t[2]+2^77
// t[3]+2^102 t[4]+...+2^230 t[9]. Bounds on each t[i] vary depending on
// context.
type fieldElement [10]int32

func feZero(fe *fieldElement) {
	for i := range fe {
		fe[i] = 0
	}
}

func feOne(fe *fieldElement) {
	feZero(fe)
	fe[0] = 1
}

func feAdd(dst, a, b *fieldElement) {
	for i := range dst {
		dst[i] = a[i] + b[i]
	}
}

func feSub(dst, a, b *fieldElement) {
	for i := range dst {
		dst[i] = a[i] - b[i]
	}
}

func feCopy(dst, src *fieldElement) {
	for i := range dst {
		dst[i] = src[i]
	}
}

// feCSwap replaces (f,g) with (g,f) if b == 1; replaces (f,g) with (f,g) if b == 0.
//
// Preconditions: b in {0,1}.
func feCSwap(f, g *fieldElement, b int32) {
	b = -b
	for i := range f {
		t := b & (f[i] ^ g[i])
		f[i] ^= t
		g[i] ^= t
	}
}

// load3 reads a 24-bit, little-endian value from in.
func load3(in []byte) int64 {
	var r int64
	r = int64(in[0])
	r |= int64(in[1]) << 8
	r |= int64(in[2]) << 16
	return r
}

// load4 reads a 32-bit, little-endian value from in.
func load4(in []byte) int64 {
	return int64(binary.LittleEndian.Uint32(in))
}

func feFromBytes(dst *fieldElement, src *[32]byte) {
	h0 := load4(src[:])
	h1 := load3(src[4:]) << 6
	h2 := load3(src[7:]) << 5
	h3 := load3(src[10:]) << 3
	h4 := load3(src[13:]) << 2
	h5 := load4(src[16:])
	h6 := load3(src[20:]) << 7
	h7 := load3(src[23:]) << 5
	h8 := load3(src[26:]) << 4
	h9 := load3(src[29:]) << 2

	var carry [10]int64
	carry[9] = (h9 + 1<<24) >> 25
	h0 += carry[9] * 19
	h9 -= carry[9] << 25
	carry[1] = (h1 + 1<<24) >> 25
	h2 += carry[1]
	h1 -= carry[1] << 25
	carry[3] = (h3 + 1<<24) >> 25
	h4 += carry[3]
	h3 -= carry[3] << 25
	carry[5] = (h5 + 1<<24) >> 25
	h6 += carry[5]
	h5 -= carry[5] << 25
	carry[7] = (h7 + 1<<24) >> 25
	h8 += carry[7]
	h7 -= carry[7] << 25

	carry[0] = (h0 + 1<<25) >> 26
	h1 += carry[0]
	h0 -= carry[0] << 26
	carry[2] = (h2 + 1<<25) >> 26
	h3 += carry[2]
	h2 -= carry[2] << 26
	carry[4] = (h4 + 1<<25) >> 26
	h5 += carry[4]
	h4 -= carry[4] << 26
	carry[6] = (h6 + 1<<25) >> 26
	h7 += carry[6]
	h6 -= carry[6] << 26
	carry[8] = (h8 + 1<<25) >> 26
	h9 += carry[8]
	h8 -= carry[8] << 26

	dst[0] = int32(h0)
	dst[1] = int32(h1)
	dst[2] = int32(h2)
	dst[3] = int32(h3)
	dst[4] = int32(h4)
	dst[5] = int32(h5)
	dst[6] = int32(h6)
	dst[7] = int32(h7)
	dst[8] = int32(h8)
	dst[9] = int32(h9)
}

// feToBytes marshals h to s.
// Preconditions:
//   |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
//
// Write p=2^255-19; q=floor(h/p).
// Basic claim: q = floor(2^(-255)(h + 19 2^(-25)h9 + 2^(-1))).
//
// Proof:
//   Have |h|<=p so |q|<=1 so |19^2 2^(-255) q|<1/4.
//   Also have |h-2^230 h9|<2^230 so |19 2^(-255)(h-2^230 h9)|<1/4.
//
//   Write y=2^(-1)-19^2 2^(-255)q-19 2^(-255)(h-2^230 h9).
//   Then 0<y<1.
//
//   Write r=h-pq.
//   Have 0<=r<=p-1=2^255-20.
//   Thus 0<=r+19(2^-255)r<r+19(2^-255)2^255<=2^255-1.
//
//   Write x=r+19(2^-255)r+y.
//   Then 0<x<2^255 so floor(2^(-255)x) = 0 so floor(q+2^(-255)x) = q.
//
//   Have q+2^(-255)x = 2^(-255)(h + 19 2^(-25) h9 + 2^(-1))
//   so floor(2^(-255)(h + 19 2^(-25) h9 + 2^(-1))) = q.
func feToBytes(s *[32]byte, h *fieldElement) {
	var carry [10]int32

	q := (19*h[9] + (1 << 24)) >> 25
	q = (h[0] + q) >> 26
	q = (h[1] + q) >> 25
	q = (h[2] + q) >> 26
	q = (h[3] + q) >> 25
	q = (h[
    
func feSquare(h, f *fieldElement) {
	f0 := f[0]
	f1 := f[1]
	f2 := f[2]
	f3 := f[3]
	f4 := f[4]
	f5 := f[5]
	f6 := f[6]
	f7 := f[7]
	f8 := f[8]
	f9 := f[9]
	f0_2 := 2 * f0
	f1_2 := 2 * f1
	f2_2 := 2 * f2
	f3_2 := 2 * f3
	f4_2 := 2 * f4
	f5_2 := 2 * f5
	f6_2 := 2 * f6
	f7_2 := 2 * f7
	f5_38 := 38 * f5 // 1.31*2^30
	f6_19 := 19 * f6 // 1.31*2^30
	f7_38 := 38 * f7 // 1.31*2^30
	f8_19 := 19 * f8 // 1.31*2^30
	f9_38 := 38 * f9 // 1.31*2^30
	f0f0 := int64(f0) * int64(f0)
	f0f1_2 := int64(f0_2) * int64(f1)
	f0f2_2 := int64(f0_2) * int64(f2)
	f0f3_2 := int64(f0_2) * int64(f3)
	f0f4_2 := int64(f0_2) * int64(f4)
	f0f5_2 := int64(f0_2) * int64(f5)
	f0f6_2 := int64(f0_2) * int64(f6)
	f0f7_2 := int64(f0_2) * int64(f7)
	f0f8_2 := int64(f0_2) * int64(f8)
	f0f9_2 := int64(f0_2) * int64(f9)
	f1f1_2 := int64(f1_2) * int64(f1)
	f1f2_2 := int64(f1_2) * int64(f2)
	f1f3_4 := int64(f1_2) * int64(f3_2)
	f1f4_2 := int64(f1_2) * int64(f4)
	f1f5_4 := int64(f1_2) * int64(f5_2)
	f1f6_2 := int64(f1_2) * int64(f6)
	f1f7_4 := int64(f1_2) * int64(f7_2)
	f1f8_2 := int64(f1_2) * int64(f8)
	f1f9_76 := int64(f1_2) * int64(f9_38)
	f2f2 := int64(f2) * int64(f2)
	f2f3_2 := int64(f2_2) * int64(f3)
	f2f4_2 := int64(f2_2) * int64(f4)
	f2f5_2 := int64(f2_2) * int64(f5)
	f2f6_2 := int64(f2_2) * int64(f6)
	f2f7_2 := int64(f2_2) * int64(f7)
	f2f8_38 := int64(f2_2) * int64(f8_19)
	f2f9_38 := int64(f2) * int64(f9_38)
	f3f3_2 := int64(f3_2) * int64(f3)
	f3f4_2 := int64(f3_2) * int64(f4)
	f3f5_4 := int64(f3_2) * int64(f5_2)
	f3f6_2 := int64(f3_2) * int64(f6)
	f3f7_76 := int64(f3_2) * int64(f7_38)
	f3f8_38 := int64(f3_2) * int64(f8_19)
	f3f9_76 := int64(f3_2) * int64(f9_38)
	f4f4 := int64(f4) * int64(f4)
	f4f5_2 := int64(f4_2) * int64(f5)
	f4f6_38 := int64(f4_2) * int64(f6_19)
	f4f7_38 := int64(f4) * int64(f7_38)
	f4f8_38 := int64(f4_2) * int64(f8_19)
	f4f9_38 := int64(f4) * int64(f9_38)
	f5f5_38 := int64(f5) * int64(f5_38)
	f5f6_38 := int64(f5_2) * int64(f6_19)
	f5f7_76 := int64(f5_2) * int64(f7_38)
	f5f8_38 := int64(f5_2) * int64(f8_19)
	f5f9_76 := int64(f5_2) * int64(f9_38)
	f6f6_19 := int64(f6) * int64(f6_19)
	f6f7_38 := int64(f6) * int64(f7_38)
	f6f8_38 := int64(f6_2) * int64(f8_19)
	f6f9_38 := int64(f6) * int64(f9_38)
	f7f7_38 := int64(f7) * int64(f7_38)
	f7f8_38 := int64(f7_2) * int64(f8_19)
	f7f9_76 := int64(f7_2) * int64(f9_38)
	f8f8_19 := int64(f8) * int64(f8_19)
	f8f9_38 := int64(f8) * int64(f9_38)
	f9f9_38 := int64(f9) * int64(f9_38)
	h0 := f0f0 + f1f9_76 + f2f8_38 + f3f7_76 + f4f6_38 + f5f5_38
	h1 := f0f1_2 + f2f9_38 + f3f8_38 + f4f7_38 + f5f6_38
	h2 := f0f2_2 + f1f1_2 + f3f9_76 + f4f8_38 + f5f7_76 + f6f6_19
	h3 := f0f3_2 + f1f2_2 + f4f9_38 + f5f8_38 + f6f7_38
	h4 := f0f4_2 + f1f3_4 + f2f2 + f5f9_76 + f6f8_38 + f7f7_38
	h5 := f0f5_2 + f1f4_2 + f2f3_2 + f6f9_38 + f7f8_38
	h6 := f0f6_2 + f1f5_4 + f2f4_2 + f3f3_2 + f7f9_76 + f8f8_19
	h7 := f0f7_2 + f1f6_2 + f2f5_2 + f3f4_2 + f8f9_38
	h8 := f0f8_2 + f1f7_4 + f2f6_2 + f3f5_4 + f4f4 + f9f9_38
	h9 := f0f9_2 + f1f8_2 + f2f7_2 + f3f6_2 + f4f5_2
	var carry [10]int64

	carry[0] = (h0 + (1 << 25)) >> 26
	h1 += carry[0]
	h0 -= carry[0] << 26
	carry[4] = (h4 + (1 << 25)) >> 26
	h5 += carry[4]
	h4 -= carry[4] << 26

	carry[1] = (h1 + (1 << 24)) >> 25
	h2 += carry[1]
	h1 -= carry[1] << 25
	carry[5] = (h5 + (1 << 24)) >> 25
	h6 += carry[5]
	h5 -= carry[5] << 25

	carry[2] = (h2 + (1 << 25)) >> 26
	h3 += carry[2]
	h2 -= carry[2] << 26
	carry[6] = (h6 + (1 << 25)) >> 26
	h7 += carry[6]
	h6 -= carry[6] << 26

	carry[3] = (h3 + (1 << 24)) >> 25
	h4 += carry[3]
	h3 -= carry[3] << 25
	carry[7] = (h7 + (1 << 24)) >> 25
	h8 += carry[7]
	h7 -= carry[7] << 25

	carry[4] = (h4 + (1 << 25)) >> 26
	h5 += carry[4]
	h4 -= carry[4] << 26
	carry[8] = (h8 + (1 << 25)) >> 26
	h9 += carry[8]
	h8 -= carry[8] << 26

	carry[9] = (h9 + (1 << 24)) >> 25
	h0 += carry[9] * 19
	h9 -= carry[9] << 25

	carry[0] = (h0 + (1 << 25)) >> 26
	h1 += carry[0]
	h0 -= carry[0] << 26

	h[0] = int32(h0)
	h[1] = int32(h1)
	h[2] = int32(h2)
	h[3] = int32(h3)
	h[4] = int32(h4)
	h[5] = int32(h5)
	h[6] = int32(h6)
	h[7] = int32(h7)
	h[8] = int32(h8)
	h[9] = int32(h9)
}