#include <r_lib.h>
#include "fixedint.h"
#include "fe.h"

// h = 0
void fe_0(fe h) {
	h[0] = 0;
	h[1] = 0;
	h[2] = 0;
	h[3] = 0;
	h[4] = 0;
	h[5] = 0;
	h[6] = 0;
	h[7] = 0;
	h[8] = 0;
	h[9] = 0;
}

// h = 1
void fe_1(fe h) {
	h[0] = 1;
	h[1] = 0;
	h[2] = 0;
	h[3] = 0;
	h[4] = 0;
	h[5] = 0;
	h[6] = 0;
	h[7] = 0;
	h[8] = 0;
	h[9] = 0;
}

/* h = f + g
 * Can overlap h with f or g.
 * Preconditions:
 * 	|f| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
 * 	|g| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
 *
 * Postconditions:
 * |h| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. */
void fe_add(fe h, const fe f, const fe g) {
	st32 f0 = f[0];
	st32 f1 = f[1];
	st32 f2 = f[2];
	st32 f3 = f[3];
	st32 f4 = f[4];
	st32 f5 = f[5];
	st32 f6 = f[6];
	st32 f7 = f[7];
	st32 f8 = f[8];
	st32 f9 = f[9];
	st32 g0 = g[0];
	st32 g1 = g[1];
	st32 g2 = g[2];
	st32 g3 = g[3];
	st32 g4 = g[4];
	st32 g5 = g[5];
	st32 g6 = g[6];
	st32 g7 = g[7];
	st32 g8 = g[8];
	st32 g9 = g[9];
	st32 h0 = f0 + g0;
	st32 h1 = f1 + g1;
	st32 h2 = f2 + g2;
	st32 h3 = f3 + g3;
	st32 h4 = f4 + g4;
	st32 h5 = f5 + g5;
	st32 h6 = f6 + g6;
	st32 h7 = f7 + g7;
	st32 h8 = f8 + g8;
	st32 h9 = f9 + g9;

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

/* Replace (f,g) with (g,g) if b == 1;
	replace (f,g) with (f,g) if b == 0.

	Preconditions: b in {0,1}. */
void fe_cmov(fe f, const fe g, unsigned int b) {
	st32 f0 = f[0];
	st32 f1 = f[1];
	st32 f2 = f[2];
	st32 f3 = f[3];
	st32 f4 = f[4];
	st32 f5 = f[5];
	st32 f6 = f[6];
	st32 f7 = f[7];
	st32 f8 = f[8];
	st32 f9 = f[9];
	st32 g0 = g[0];
	st32 g1 = g[1];
	st32 g2 = g[2];
	st32 g3 = g[3];
	st32 g4 = g[4];
	st32 g5 = g[5];
	st32 g6 = g[6];
	st32 g7 = g[7];
	st32 g8 = g[8];
	st32 g9 = g[9];
	st32 x0 = f0 ^ g0;
	st32 x1 = f1 ^ g1;
	st32 x2 = f2 ^ g2;
	st32 x3 = f3 ^ g3;
	st32 x4 = f4 ^ g4;
	st32 x5 = f5 ^ g5;
	st32 x6 = f6 ^ g6;
	st32 x7 = f7 ^ g7;
	st32 x8 = f8 ^ g8;
	st32 x9 = f9 ^ g9;

	b = (unsigned int)(-(int)b); /* silence warning */
	x0 &= b;
	x1 &= b;
	x2 &= b;
	x3 &= b;
	x4 &= b;
	x5 &= b;
	x6 &= b;
	x7 &= b;
	x8 &= b;
	x9 &= b;

	f[0] = f0 ^ x0;
	f[1] = f1 ^ x1;
	f[2] = f2 ^ x2;
	f[3] = f3 ^ x3;
	f[4] = f4 ^ x4;
	f[5] = f5 ^ x5;
	f[6] = f6 ^ x6;
	f[7] = f7 ^ x7;
	f[8] = f8 ^ x8;
	f[9] = f9 ^ x9;
}

// h = f
void fe_copy(fe h, const fe f) {
	st32 f0 = f[0];
	st32 f1 = f[1];
	st32 f2 = f[2];
	st32 f3 = f[3];
	st32 f4 = f[4];
	st32 f5 = f[5];
	st32 f6 = f[6];
	st32 f7 = f[7];
	st32 f8 = f[8];
	st32 f9 = f[9];

	h[0] = f0;
	h[1] = f1;
	h[2] = f2;
	h[3] = f3;
	h[4] = f4;
	h[5] = f5;
	h[6] = f6;
	h[7] = f7;
	h[8] = f8;
	h[9] = f9;
}

/// Ignores top bit of h.
void fe_frombytes(fe h, const unsigned char *s) {
	st64 h0 = r_read_le32 (s);
	st64 h1 = r_read_le24 (s + 4) << 6;
	st64 h2 = r_read_le24 (s + 7) << 5;
	st64 h3 = r_read_le24 (s + 10) << 3;
	st64 h4 = r_read_le24 (s + 13) << 2;
	st64 h5 = r_read_le32 (s + 16);
	st64 h6 = r_read_le24 (s + 20) << 7;
	st64 h7 = r_read_le24 (s + 23) << 5;
	st64 h8 = r_read_le24 (s + 26) << 4;
	st64 h9 = (r_read_le24 (s + 29) & 8388607) << 2;
	st64 carry0;
	st64 carry1;
	st64 carry2;
	st64 carry3;
	st64 carry4;
	st64 carry5;
	st64 carry6;
	st64 carry7;
	st64 carry8;
	st64 carry9;

	carry9 = (h9 + (st64)(1 << 24)) >> 25;
	h0 += carry9 * 19;
	h9 -= carry9 * (1LL << 25);
	carry1 = (h1 + (st64)(1 << 24)) >> 25;
	h2 += carry1;
	h1 -= carry1 * (1LL << 25);
	carry3 = (h3 + (st64)(1 << 24)) >> 25;
	h4 += carry3;
	h3 -= carry3 * (1LL << 25);
	carry5 = (h5 + (st64)(1 << 24)) >> 25;
	h6 += carry5;
	h5 -= carry5 * (1LL << 25);
	carry7 = (h7 + (st64)(1 << 24)) >> 25;
	h8 += carry7;
	h7 -= carry7 * (1LL << 25);
	carry0 = (h0 + (st64)(1 << 25)) >> 26;
	h1 += carry0;
	h0 -= carry0 * (1LL << 26);
	carry2 = (h2 + (st64)(1 << 25)) >> 26;
	h3 += carry2;
	h2 -= carry2 * (1LL << 26);
	carry4 = (h4 + (st64)(1 << 25)) >> 26;
	h5 += carry4;
	h4 -= carry4 * (1LL << 26);
	carry6 = (h6 + (st64)(1 << 25)) >> 26;
	h7 += carry6;
	h6 -= carry6 * (1LL << 26);
	carry8 = (h8 + (st64)(1 << 25)) >> 26;
	h9 += carry8;
	h8 -= carry8 * (1LL << 26);

	h[0] = (st32)h0;
	h[1] = (st32)h1;
	h[2] = (st32)h2;
	h[3] = (st32)h3;
	h[4] = (st32)h4;
	h[5] = (st32)h5;
	h[6] = (st32)h6;
	h[7] = (st32)h7;
	h[8] = (st32)h8;
	h[9] = (st32)h9;
}

void fe_invert(fe out, const fe z) {
	fe t0;
	fe t1;
	fe t2;
	fe t3;
	int i;

	fe_sq (t0, z);

	for (i = 1; i < 1; i++) {
		fe_sq (t0, t0);
	}

	fe_sq (t1, t0);

	for (i = 1; i < 2; i++) {
		fe_sq (t1, t1);
	}

	fe_mul (t1, z, t1);
	fe_mul (t0, t0, t1);
	fe_sq (t2, t0);

	for (i = 1; i < 1; i++) {
		fe_sq (t2, t2);
	}

	fe_mul (t1, t1, t2);
	fe_sq (t2, t1);

	for (i = 1; i < 5; i++) {
		fe_sq (t2, t2);
	}

	fe_mul (t1, t2, t1);
	fe_sq (t2, t1);

	for (i = 1; i < 10; i++) {
		fe_sq (t2, t2);
	}

	fe_mul (t2, t2, t1);
	fe_sq (t3, t2);

	for (i = 1; i < 20; i++) {
		fe_sq (t3, t3);
	}

	fe_mul (t2, t3, t2);
	fe_sq (t2, t2);

	for (i = 1; i < 10; i++) {
		fe_sq (t2, t2);
	}

	fe_mul (t1, t2, t1);
	fe_sq (t2, t1);

	for (i = 1; i < 50; i++) {
		fe_sq (t2, t2);
	}

	fe_mul (t2, t2, t1);
	fe_sq (t3, t2);

	for (i = 1; i < 100; i++) {
		fe_sq (t3, t3);
	}

	fe_mul (t2, t3, t2);
	fe_sq (t2, t2);

	for (i = 1; i < 50; i++) {
		fe_sq (t2, t2);
	}

	fe_mul (t1, t2, t1);
	fe_sq (t1, t1);

	for (i = 1; i < 5; i++) {
		fe_sq (t1, t1);
	}

	fe_mul (out, t1, t0);
}

/* return 1 if f is in {1,3,5,...,q-2}
 * return 0 if f is in {0,2,4,...,q-1}
 * Preconditions: |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. */
int fe_isnegative(const fe f) {
	unsigned char s[32];

	fe_tobytes (s, f);

	return s[0] & 1;
}

/* return 1 if f == 0
 * return 0 if f != 0
 * Preconditions: |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
 */
int fe_isnonzero (const fe f) {
	unsigned char s[32];
	unsigned char r;

	fe_tobytes (s, f);

	r = s[0];
#define F(i) r |= s[i]
	F (1);
	F (2);
	F (3);
	F (4);
	F (5);
	F (6);
	F (7);
	F (8);
	F (9);
	F (10);
	F (11);
	F (12);
	F (13);
	F (14);
	F (15);
	F (16);
	F (17);
	F (18);
	F (19);
	F (20);
	F (21);
	F (22);
	F (23);
	F (24);
	F (25);
	F (26);
	F (27);
	F (28);
	F (29);
	F (30);
	F (31);
#undef F

	return r != 0;
}

/* h = f * g
 * Can overlap h with f or g.
 *
 * Preconditions:
 * 	|f| bounded by 1.65*2^26,1.65*2^25,1.65*2^26,1.65*2^25,etc.
 * 	|g| bounded by 1.65*2^26,1.65*2^25,1.65*2^26,1.65*2^25,etc.
 *
 * Postconditions:
 * 	|h| bounded by 1.01*2^25,1.01*2^24,1.01*2^25,1.01*2^24,etc.

Notes on implementation strategy:

Using schoolbook multiplication.
Karatsuba would save a little in some cost models.

Most multiplications by 2 and 19 are 32-bit precomputations;
cheaper than 64-bit postcomputations.

There is one remaining multiplication by 19 in the carry chain;
one *19 precomputation can be merged into this,
but the resulting data flow is considerably less clean.

There are 12 carries below.
10 of them are 2-way parallelizable and vectorizable.
Can get away with 11 carries, but then data flow is much deeper.

With tighter constraints on inputs can squeeze carries into int32.*/
void fe_mul(fe h, const fe f, const fe g) {
	st32 f0 = f[0];
	st32 f1 = f[1];
	st32 f2 = f[2];
	st32 f3 = f[3];
	st32 f4 = f[4];
	st32 f5 = f[5];
	st32 f6 = f[6];
	st32 f7 = f[7];
	st32 f8 = f[8];
	st32 f9 = f[9];
	st32 g0 = g[0];
	st32 g1 = g[1];
	st32 g2 = g[2];
	st32 g3 = g[3];
	st32 g4 = g[4];
	st32 g5 = g[5];
	st32 g6 = g[6];
	st32 g7 = g[7];
	st32 g8 = g[8];
	st32 g9 = g[9];
	st32 g1_19 = 19 * g1; /* 1.959375*2^29 */
	st32 g2_19 = 19 * g2; /* 1.959375*2^30; still ok */
	st32 g3_19 = 19 * g3;
	st32 g4_19 = 19 * g4;
	st32 g5_19 = 19 * g5;
	st32 g6_19 = 19 * g6;
	st32 g7_19 = 19 * g7;
	st32 g8_19 = 19 * g8;
	st32 g9_19 = 19 * g9;
	st32 f1_2 = 2 * f1;
	st32 f3_2 = 2 * f3;
	st32 f5_2 = 2 * f5;
	st32 f7_2 = 2 * f7;
	st32 f9_2 = 2 * f9;
	st64 f0g0 = f0 * (st64)g0;
	st64 f0g1 = f0 * (st64)g1;
	st64 f0g2 = f0 * (st64)g2;
	st64 f0g3 = f0 * (st64)g3;
	st64 f0g4 = f0 * (st64)g4;
	st64 f0g5 = f0 * (st64)g5;
	st64 f0g6 = f0 * (st64)g6;
	st64 f0g7 = f0 * (st64)g7;
	st64 f0g8 = f0 * (st64)g8;
	st64 f0g9 = f0 * (st64)g9;
	st64 f1g0 = f1 * (st64)g0;
	st64 f1g1_2 = f1_2 * (st64)g1;
	st64 f1g2 = f1 * (st64)g2;
	st64 f1g3_2 = f1_2 * (st64)g3;
	st64 f1g4 = f1 * (st64)g4;
	st64 f1g5_2 = f1_2 * (st64)g5;
	st64 f1g6 = f1 * (st64)g6;
	st64 f1g7_2 = f1_2 * (st64)g7;
	st64 f1g8 = f1 * (st64)g8;
	st64 f1g9_38 = f1_2 * (st64)g9_19;
	st64 f2g0 = f2 * (st64)g0;
	st64 f2g1 = f2 * (st64)g1;
	st64 f2g2 = f2 * (st64)g2;
	st64 f2g3 = f2 * (st64)g3;
	st64 f2g4 = f2 * (st64)g4;
	st64 f2g5 = f2 * (st64)g5;
	st64 f2g6 = f2 * (st64)g6;
	st64 f2g7 = f2 * (st64)g7;
	st64 f2g8_19 = f2 * (st64)g8_19;
	st64 f2g9_19 = f2 * (st64)g9_19;
	st64 f3g0 = f3 * (st64)g0;
	st64 f3g1_2 = f3_2 * (st64)g1;
	st64 f3g2 = f3 * (st64)g2;
	st64 f3g3_2 = f3_2 * (st64)g3;
	st64 f3g4 = f3 * (st64)g4;
	st64 f3g5_2 = f3_2 * (st64)g5;
	st64 f3g6 = f3 * (st64)g6;
	st64 f3g7_38 = f3_2 * (st64)g7_19;
	st64 f3g8_19 = f3 * (st64)g8_19;
	st64 f3g9_38 = f3_2 * (st64)g9_19;
	st64 f4g0 = f4 * (st64)g0;
	st64 f4g1 = f4 * (st64)g1;
	st64 f4g2 = f4 * (st64)g2;
	st64 f4g3 = f4 * (st64)g3;
	st64 f4g4 = f4 * (st64)g4;
	st64 f4g5 = f4 * (st64)g5;
	st64 f4g6_19 = f4 * (st64)g6_19;
	st64 f4g7_19 = f4 * (st64)g7_19;
	st64 f4g8_19 = f4 * (st64)g8_19;
	st64 f4g9_19 = f4 * (st64)g9_19;
	st64 f5g0 = f5 * (st64)g0;
	st64 f5g1_2 = f5_2 * (st64)g1;
	st64 f5g2 = f5 * (st64)g2;
	st64 f5g3_2 = f5_2 * (st64)g3;
	st64 f5g4 = f5 * (st64)g4;
	st64 f5g5_38 = f5_2 * (st64)g5_19;
	st64 f5g6_19 = f5 * (st64)g6_19;
	st64 f5g7_38 = f5_2 * (st64)g7_19;
	st64 f5g8_19 = f5 * (st64)g8_19;
	st64 f5g9_38 = f5_2 * (st64)g9_19;
	st64 f6g0 = f6 * (st64)g0;
	st64 f6g1 = f6 * (st64)g1;
	st64 f6g2 = f6 * (st64)g2;
	st64 f6g3 = f6 * (st64)g3;
	st64 f6g4_19 = f6 * (st64)g4_19;
	st64 f6g5_19 = f6 * (st64)g5_19;
	st64 f6g6_19 = f6 * (st64)g6_19;
	st64 f6g7_19 = f6 * (st64)g7_19;
	st64 f6g8_19 = f6 * (st64)g8_19;
	st64 f6g9_19 = f6 * (st64)g9_19;
	st64 f7g0 = f7 * (st64)g0;
	st64 f7g1_2 = f7_2 * (st64)g1;
	st64 f7g2 = f7 * (st64)g2;
	st64 f7g3_38 = f7_2 * (st64)g3_19;
	st64 f7g4_19 = f7 * (st64)g4_19;
	st64 f7g5_38 = f7_2 * (st64)g5_19;
	st64 f7g6_19 = f7 * (st64)g6_19;
	st64 f7g7_38 = f7_2 * (st64)g7_19;
	st64 f7g8_19 = f7 * (st64)g8_19;
	st64 f7g9_38 = f7_2 * (st64)g9_19;
	st64 f8g0 = f8 * (st64)g0;
	st64 f8g1 = f8 * (st64)g1;
	st64 f8g2_19 = f8 * (st64)g2_19;
	st64 f8g3_19 = f8 * (st64)g3_19;
	st64 f8g4_19 = f8 * (st64)g4_19;
	st64 f8g5_19 = f8 * (st64)g5_19;
	st64 f8g6_19 = f8 * (st64)g6_19;
	st64 f8g7_19 = f8 * (st64)g7_19;
	st64 f8g8_19 = f8 * (st64)g8_19;
	st64 f8g9_19 = f8 * (st64)g9_19;
	st64 f9g0 = f9 * (st64)g0;
	st64 f9g1_38 = f9_2 * (st64)g1_19;
	st64 f9g2_19 = f9 * (st64)g2_19;
	st64 f9g3_38 = f9_2 * (st64)g3_19;
	st64 f9g4_19 = f9 * (st64)g4_19;
	st64 f9g5_38 = f9_2 * (st64)g5_19;
	st64 f9g6_19 = f9 * (st64)g6_19;
	st64 f9g7_38 = f9_2 * (st64)g7_19;
	st64 f9g8_19 = f9 * (st64)g8_19;
	st64 f9g9_38 = f9_2 * (st64)g9_19;
	st64 h0 = f0g0 + f1g9_38 + f2g8_19 + f3g7_38 + f4g6_19 + f5g5_38 + f6g4_19 + f7g3_38 + f8g2_19 + f9g1_38;
	st64 h1 = f0g1 + f1g0 + f2g9_19 + f3g8_19 + f4g7_19 + f5g6_19 + f6g5_19 + f7g4_19 + f8g3_19 + f9g2_19;
	st64 h2 = f0g2 + f1g1_2 + f2g0 + f3g9_38 + f4g8_19 + f5g7_38 + f6g6_19 + f7g5_38 + f8g4_19 + f9g3_38;
	st64 h3 = f0g3 + f1g2 + f2g1 + f3g0 + f4g9_19 + f5g8_19 + f6g7_19 + f7g6_19 + f8g5_19 + f9g4_19;
	st64 h4 = f0g4 + f1g3_2 + f2g2 + f3g1_2 + f4g0 + f5g9_38 + f6g8_19 + f7g7_38 + f8g6_19 + f9g5_38;
	st64 h5 = f0g5 + f1g4 + f2g3 + f3g2 + f4g1 + f5g0 + f6g9_19 + f7g8_19 + f8g7_19 + f9g6_19;
	st64 h6 = f0g6 + f1g5_2 + f2g4 + f3g3_2 + f4g2 + f5g1_2 + f6g0 + f7g9_38 + f8g8_19 + f9g7_38;
	st64 h7 = f0g7 + f1g6 + f2g5 + f3g4 + f4g3 + f5g2 + f6g1 + f7g0 + f8g9_19 + f9g8_19;
	st64 h8 = f0g8 + f1g7_2 + f2g6 + f3g5_2 + f4g4 + f5g3_2 + f6g2 + f7g1_2 + f8g0 + f9g9_38;
	st64 h9 = f0g9 + f1g8 + f2g7 + f3g6 + f4g5 + f5g4 + f6g3 + f7g2 + f8g1 + f9g0;
	st64 carry0;
	st64 carry1;
	st64 carry2;
	st64 carry3;
	st64 carry4;
	st64 carry5;
	st64 carry6;
	st64 carry7;
	st64 carry8;
	st64 carry9;

	carry0 = (h0 + (st64)(1 << 25)) >> 26;
	h1 += carry0;
	h0 -= carry0 * (1LL << 26);
	carry4 = (h4 + (st64)(1 << 25)) >> 26;
	h5 += carry4;
	h4 -= carry4 * (1LL << 26);

	carry1 = (h1 + (st64)(1 << 24)) >> 25;
	h2 += carry1;
	h1 -= carry1 * (1LL << 25);
	carry5 = (h5 + (st64)(1 << 24)) >> 25;
	h6 += carry5;
	h5 -= carry5 * (1LL << 25);

	carry2 = (h2 + (st64)(1 << 25)) >> 26;
	h3 += carry2;
	h2 -= carry2 * (1LL << 26);
	carry6 = (h6 + (st64)(1 << 25)) >> 26;
	h7 += carry6;
	h6 -= carry6 * (1LL << 26);

	carry3 = (h3 + (st64)(1 << 24)) >> 25;
	h4 += carry3;
	h3 -= carry3 * (1LL << 25);
	carry7 = (h7 + (st64)(1 << 24)) >> 25;
	h8 += carry7;
	h7 -= carry7 * (1LL << 25);

	carry4 = (h4 + (st64)(1 << 25)) >> 26;
	h5 += carry4;
	h4 -= carry4 * (1LL << 26);
	carry8 = (h8 + (st64)(1 << 25)) >> 26;
	h9 += carry8;
	h8 -= carry8 * (1LL << 26);

	carry9 = (h9 + (st64)(1 << 24)) >> 25;
	h0 += carry9 * 19;
	h9 -= carry9 * (1LL << 25);

	carry0 = (h0 + (st64)(1 << 25)) >> 26;
	h1 += carry0;
	h0 -= carry0 * (1LL << 26);

	h[0] = (st32)h0;
	h[1] = (st32)h1;
	h[2] = (st32)h2;
	h[3] = (st32)h3;
	h[4] = (st32)h4;
	h[5] = (st32)h5;
	h[6] = (st32)h6;
	h[7] = (st32)h7;
	h[8] = (st32)h8;
	h[9] = (st32)h9;
}

/* h = -f
 * Preconditions: |f| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
 * Postconditions: |h| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc. */
void fe_neg(fe h, const fe f) {
	st32 f0 = f[0];
	st32 f1 = f[1];
	st32 f2 = f[2];
	st32 f3 = f[3];
	st32 f4 = f[4];
	st32 f5 = f[5];
	st32 f6 = f[6];
	st32 f7 = f[7];
	st32 f8 = f[8];
	st32 f9 = f[9];
	st32 h0 = -f0;
	st32 h1 = -f1;
	st32 h2 = -f2;
	st32 h3 = -f3;
	st32 h4 = -f4;
	st32 h5 = -f5;
	st32 h6 = -f6;
	st32 h7 = -f7;
	st32 h8 = -f8;
	st32 h9 = -f9;

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

void fe_pow22523(fe out, const fe z) {
	fe t0;
	fe t1;
	fe t2;
	int i;
	fe_sq (t0, z);

	for (i = 1; i < 1; i++) {
		fe_sq (t0, t0);
	}

	fe_sq (t1, t0);

	for (i = 1; i < 2; i++) {
		fe_sq (t1, t1);
	}

	fe_mul (t1, z, t1);
	fe_mul (t0, t0, t1);
	fe_sq (t0, t0);

	for (i = 1; i < 1; i++) {
		fe_sq (t0, t0);
	}

	fe_mul (t0, t1, t0);
	fe_sq (t1, t0);

	for (i = 1; i < 5; i++) {
		fe_sq (t1, t1);
	}

	fe_mul (t0, t1, t0);
	fe_sq (t1, t0);

	for (i = 1; i < 10; i++) {
		fe_sq (t1, t1);
	}

	fe_mul (t1, t1, t0);
	fe_sq (t2, t1);

	for (i = 1; i < 20; i++) {
		fe_sq (t2, t2);
	}

	fe_mul (t1, t2, t1);
	fe_sq (t1, t1);

	for (i = 1; i < 10; i++) {
		fe_sq (t1, t1);
	}

	fe_mul (t0, t1, t0);
	fe_sq (t1, t0);

	for (i = 1; i < 50; i++) {
		fe_sq (t1, t1);
	}

	fe_mul (t1, t1, t0);
	fe_sq (t2, t1);

	for (i = 1; i < 100; i++) {
		fe_sq (t2, t2);
	}

	fe_mul (t1, t2, t1);
	fe_sq (t1, t1);

	for (i = 1; i < 50; i++) {
		fe_sq (t1, t1);
	}

	fe_mul (t0, t1, t0);
	fe_sq (t0, t0);

	for (i = 1; i < 2; i++) {
		fe_sq (t0, t0);
	}

	fe_mul (out, t0, z);
	return;
}

/* * h = f * f
 * Can overlap h with f.
 * Preconditions: |f| bounded by 1.65*2^26,1.65*2^25,1.65*2^26,1.65*2^25,etc.
 * Postconditions: |h| bounded by 1.01*2^25,1.01*2^24,1.01*2^25,1.01*2^24,etc.
 *
 * See fe_mul.c for discussion of implementation strategy.*/
void fe_sq(fe h, const fe f) {
	st32 f0 = f[0];
	st32 f1 = f[1];
	st32 f2 = f[2];
	st32 f3 = f[3];
	st32 f4 = f[4];
	st32 f5 = f[5];
	st32 f6 = f[6];
	st32 f7 = f[7];
	st32 f8 = f[8];
	st32 f9 = f[9];
	st32 f0_2 = 2 * f0;
	st32 f1_2 = 2 * f1;
	st32 f2_2 = 2 * f2;
	st32 f3_2 = 2 * f3;
	st32 f4_2 = 2 * f4;
	st32 f5_2 = 2 * f5;
	st32 f6_2 = 2 * f6;
	st32 f7_2 = 2 * f7;
	st32 f5_38 = 38 * f5; /* 1.959375*2^30 */
	st32 f6_19 = 19 * f6; /* 1.959375*2^30 */
	st32 f7_38 = 38 * f7; /* 1.959375*2^30 */
	st32 f8_19 = 19 * f8; /* 1.959375*2^30 */
	st32 f9_38 = 38 * f9; /* 1.959375*2^30 */
	st64 f0f0 = f0 * (st64)f0;
	st64 f0f1_2 = f0_2 * (st64)f1;
	st64 f0f2_2 = f0_2 * (st64)f2;
	st64 f0f3_2 = f0_2 * (st64)f3;
	st64 f0f4_2 = f0_2 * (st64)f4;
	st64 f0f5_2 = f0_2 * (st64)f5;
	st64 f0f6_2 = f0_2 * (st64)f6;
	st64 f0f7_2 = f0_2 * (st64)f7;
	st64 f0f8_2 = f0_2 * (st64)f8;
	st64 f0f9_2 = f0_2 * (st64)f9;
	st64 f1f1_2 = f1_2 * (st64)f1;
	st64 f1f2_2 = f1_2 * (st64)f2;
	st64 f1f3_4 = f1_2 * (st64)f3_2;
	st64 f1f4_2 = f1_2 * (st64)f4;
	st64 f1f5_4 = f1_2 * (st64)f5_2;
	st64 f1f6_2 = f1_2 * (st64)f6;
	st64 f1f7_4 = f1_2 * (st64)f7_2;
	st64 f1f8_2 = f1_2 * (st64)f8;
	st64 f1f9_76 = f1_2 * (st64)f9_38;
	st64 f2f2 = f2 * (st64)f2;
	st64 f2f3_2 = f2_2 * (st64)f3;
	st64 f2f4_2 = f2_2 * (st64)f4;
	st64 f2f5_2 = f2_2 * (st64)f5;
	st64 f2f6_2 = f2_2 * (st64)f6;
	st64 f2f7_2 = f2_2 * (st64)f7;
	st64 f2f8_38 = f2_2 * (st64)f8_19;
	st64 f2f9_38 = f2 * (st64)f9_38;
	st64 f3f3_2 = f3_2 * (st64)f3;
	st64 f3f4_2 = f3_2 * (st64)f4;
	st64 f3f5_4 = f3_2 * (st64)f5_2;
	st64 f3f6_2 = f3_2 * (st64)f6;
	st64 f3f7_76 = f3_2 * (st64)f7_38;
	st64 f3f8_38 = f3_2 * (st64)f8_19;
	st64 f3f9_76 = f3_2 * (st64)f9_38;
	st64 f4f4 = f4 * (st64)f4;
	st64 f4f5_2 = f4_2 * (st64)f5;
	st64 f4f6_38 = f4_2 * (st64)f6_19;
	st64 f4f7_38 = f4 * (st64)f7_38;
	st64 f4f8_38 = f4_2 * (st64)f8_19;
	st64 f4f9_38 = f4 * (st64)f9_38;
	st64 f5f5_38 = f5 * (st64)f5_38;
	st64 f5f6_38 = f5_2 * (st64)f6_19;
	st64 f5f7_76 = f5_2 * (st64)f7_38;
	st64 f5f8_38 = f5_2 * (st64)f8_19;
	st64 f5f9_76 = f5_2 * (st64)f9_38;
	st64 f6f6_19 = f6 * (st64)f6_19;
	st64 f6f7_38 = f6 * (st64)f7_38;
	st64 f6f8_38 = f6_2 * (st64)f8_19;
	st64 f6f9_38 = f6 * (st64)f9_38;
	st64 f7f7_38 = f7 * (st64)f7_38;
	st64 f7f8_38 = f7_2 * (st64)f8_19;
	st64 f7f9_76 = f7_2 * (st64)f9_38;
	st64 f8f8_19 = f8 * (st64)f8_19;
	st64 f8f9_38 = f8 * (st64)f9_38;
	st64 f9f9_38 = f9 * (st64)f9_38;
	st64 h0 = f0f0 + f1f9_76 + f2f8_38 + f3f7_76 + f4f6_38 + f5f5_38;
	st64 h1 = f0f1_2 + f2f9_38 + f3f8_38 + f4f7_38 + f5f6_38;
	st64 h2 = f0f2_2 + f1f1_2 + f3f9_76 + f4f8_38 + f5f7_76 + f6f6_19;
	st64 h3 = f0f3_2 + f1f2_2 + f4f9_38 + f5f8_38 + f6f7_38;
	st64 h4 = f0f4_2 + f1f3_4 + f2f2 + f5f9_76 + f6f8_38 + f7f7_38;
	st64 h5 = f0f5_2 + f1f4_2 + f2f3_2 + f6f9_38 + f7f8_38;
	st64 h6 = f0f6_2 + f1f5_4 + f2f4_2 + f3f3_2 + f7f9_76 + f8f8_19;
	st64 h7 = f0f7_2 + f1f6_2 + f2f5_2 + f3f4_2 + f8f9_38;
	st64 h8 = f0f8_2 + f1f7_4 + f2f6_2 + f3f5_4 + f4f4 + f9f9_38;
	st64 h9 = f0f9_2 + f1f8_2 + f2f7_2 + f3f6_2 + f4f5_2;
	st64 carry0;
	st64 carry1;
	st64 carry2;
	st64 carry3;
	st64 carry4;
	st64 carry5;
	st64 carry6;
	st64 carry7;
	st64 carry8;
	st64 carry9;
	carry0 = (h0 + (st64)(1 << 25)) >> 26;
	h1 += carry0;
	h0 -= carry0 * (1LL << 26);
	carry4 = (h4 + (st64)(1 << 25)) >> 26;
	h5 += carry4;
	h4 -= carry4 * (1LL << 26);
	carry1 = (h1 + (st64)(1 << 24)) >> 25;
	h2 += carry1;
	h1 -= carry1 * (1LL << 25);
	carry5 = (h5 + (st64)(1 << 24)) >> 25;
	h6 += carry5;
	h5 -= carry5 * (1LL << 25);
	carry2 = (h2 + (st64)(1 << 25)) >> 26;
	h3 += carry2;
	h2 -= carry2 * (1LL << 26);
	carry6 = (h6 + (st64)(1 << 25)) >> 26;
	h7 += carry6;
	h6 -= carry6 * (1LL << 26);
	carry3 = (h3 + (st64)(1 << 24)) >> 25;
	h4 += carry3;
	h3 -= carry3 * (1LL << 25);
	carry7 = (h7 + (st64)(1 << 24)) >> 25;
	h8 += carry7;
	h7 -= carry7 * (1LL << 25);
	carry4 = (h4 + (st64)(1 << 25)) >> 26;
	h5 += carry4;
	h4 -= carry4 * (1LL << 26);
	carry8 = (h8 + (st64)(1 << 25)) >> 26;
	h9 += carry8;
	h8 -= carry8 * (1LL << 26);
	carry9 = (h9 + (st64)(1 << 24)) >> 25;
	h0 += carry9 * 19;
	h9 -= carry9 * (1LL << 25);
	carry0 = (h0 + (st64)(1 << 25)) >> 26;
	h1 += carry0;
	h0 -= carry0 * (1LL << 26);
	h[0] = (st32)h0;
	h[1] = (st32)h1;
	h[2] = (st32)h2;
	h[3] = (st32)h3;
	h[4] = (st32)h4;
	h[5] = (st32)h5;
	h[6] = (st32)h6;
	h[7] = (st32)h7;
	h[8] = (st32)h8;
	h[9] = (st32)h9;
}

/* h = 2 * f * f
 * Can overlap h with f.
 * Preconditions: |f| bounded by 1.65*2^26,1.65*2^25,1.65*2^26,1.65*2^25,etc.
 * Postconditions: |h| bounded by 1.01*2^25,1.01*2^24,1.01*2^25,1.01*2^24,etc.
 *
 * See fe_mul.c for discussion of implementation strategy.*/
void fe_sq2(fe h, const fe f) {
	st32 f0 = f[0];
	st32 f1 = f[1];
	st32 f2 = f[2];
	st32 f3 = f[3];
	st32 f4 = f[4];
	st32 f5 = f[5];
	st32 f6 = f[6];
	st32 f7 = f[7];
	st32 f8 = f[8];
	st32 f9 = f[9];
	st32 f0_2 = 2 * f0;
	st32 f1_2 = 2 * f1;
	st32 f2_2 = 2 * f2;
	st32 f3_2 = 2 * f3;
	st32 f4_2 = 2 * f4;
	st32 f5_2 = 2 * f5;
	st32 f6_2 = 2 * f6;
	st32 f7_2 = 2 * f7;
	st32 f5_38 = 38 * f5; /* 1.959375*2^30 */
	st32 f6_19 = 19 * f6; /* 1.959375*2^30 */
	st32 f7_38 = 38 * f7; /* 1.959375*2^30 */
	st32 f8_19 = 19 * f8; /* 1.959375*2^30 */
	st32 f9_38 = 38 * f9; /* 1.959375*2^30 */
	st64 f0f0 = f0 * (st64)f0;
	st64 f0f1_2 = f0_2 * (st64)f1;
	st64 f0f2_2 = f0_2 * (st64)f2;
	st64 f0f3_2 = f0_2 * (st64)f3;
	st64 f0f4_2 = f0_2 * (st64)f4;
	st64 f0f5_2 = f0_2 * (st64)f5;
	st64 f0f6_2 = f0_2 * (st64)f6;
	st64 f0f7_2 = f0_2 * (st64)f7;
	st64 f0f8_2 = f0_2 * (st64)f8;
	st64 f0f9_2 = f0_2 * (st64)f9;
	st64 f1f1_2 = f1_2 * (st64)f1;
	st64 f1f2_2 = f1_2 * (st64)f2;
	st64 f1f3_4 = f1_2 * (st64)f3_2;
	st64 f1f4_2 = f1_2 * (st64)f4;
	st64 f1f5_4 = f1_2 * (st64)f5_2;
	st64 f1f6_2 = f1_2 * (st64)f6;
	st64 f1f7_4 = f1_2 * (st64)f7_2;
	st64 f1f8_2 = f1_2 * (st64)f8;
	st64 f1f9_76 = f1_2 * (st64)f9_38;
	st64 f2f2 = f2 * (st64)f2;
	st64 f2f3_2 = f2_2 * (st64)f3;
	st64 f2f4_2 = f2_2 * (st64)f4;
	st64 f2f5_2 = f2_2 * (st64)f5;
	st64 f2f6_2 = f2_2 * (st64)f6;
	st64 f2f7_2 = f2_2 * (st64)f7;
	st64 f2f8_38 = f2_2 * (st64)f8_19;
	st64 f2f9_38 = f2 * (st64)f9_38;
	st64 f3f3_2 = f3_2 * (st64)f3;
	st64 f3f4_2 = f3_2 * (st64)f4;
	st64 f3f5_4 = f3_2 * (st64)f5_2;
	st64 f3f6_2 = f3_2 * (st64)f6;
	st64 f3f7_76 = f3_2 * (st64)f7_38;
	st64 f3f8_38 = f3_2 * (st64)f8_19;
	st64 f3f9_76 = f3_2 * (st64)f9_38;
	st64 f4f4 = f4 * (st64)f4;
	st64 f4f5_2 = f4_2 * (st64)f5;
	st64 f4f6_38 = f4_2 * (st64)f6_19;
	st64 f4f7_38 = f4 * (st64)f7_38;
	st64 f4f8_38 = f4_2 * (st64)f8_19;
	st64 f4f9_38 = f4 * (st64)f9_38;
	st64 f5f5_38 = f5 * (st64)f5_38;
	st64 f5f6_38 = f5_2 * (st64)f6_19;
	st64 f5f7_76 = f5_2 * (st64)f7_38;
	st64 f5f8_38 = f5_2 * (st64)f8_19;
	st64 f5f9_76 = f5_2 * (st64)f9_38;
	st64 f6f6_19 = f6 * (st64)f6_19;
	st64 f6f7_38 = f6 * (st64)f7_38;
	st64 f6f8_38 = f6_2 * (st64)f8_19;
	st64 f6f9_38 = f6 * (st64)f9_38;
	st64 f7f7_38 = f7 * (st64)f7_38;
	st64 f7f8_38 = f7_2 * (st64)f8_19;
	st64 f7f9_76 = f7_2 * (st64)f9_38;
	st64 f8f8_19 = f8 * (st64)f8_19;
	st64 f8f9_38 = f8 * (st64)f9_38;
	st64 f9f9_38 = f9 * (st64)f9_38;
	st64 h0 = f0f0 + f1f9_76 + f2f8_38 + f3f7_76 + f4f6_38 + f5f5_38;
	st64 h1 = f0f1_2 + f2f9_38 + f3f8_38 + f4f7_38 + f5f6_38;
	st64 h2 = f0f2_2 + f1f1_2 + f3f9_76 + f4f8_38 + f5f7_76 + f6f6_19;
	st64 h3 = f0f3_2 + f1f2_2 + f4f9_38 + f5f8_38 + f6f7_38;
	st64 h4 = f0f4_2 + f1f3_4 + f2f2 + f5f9_76 + f6f8_38 + f7f7_38;
	st64 h5 = f0f5_2 + f1f4_2 + f2f3_2 + f6f9_38 + f7f8_38;
	st64 h6 = f0f6_2 + f1f5_4 + f2f4_2 + f3f3_2 + f7f9_76 + f8f8_19;
	st64 h7 = f0f7_2 + f1f6_2 + f2f5_2 + f3f4_2 + f8f9_38;
	st64 h8 = f0f8_2 + f1f7_4 + f2f6_2 + f3f5_4 + f4f4 + f9f9_38;
	st64 h9 = f0f9_2 + f1f8_2 + f2f7_2 + f3f6_2 + f4f5_2;
	st64 carry0;
	st64 carry1;
	st64 carry2;
	st64 carry3;
	st64 carry4;
	st64 carry5;
	st64 carry6;
	st64 carry7;
	st64 carry8;
	st64 carry9;
	h0 += h0;
	h1 += h1;
	h2 += h2;
	h3 += h3;
	h4 += h4;
	h5 += h5;
	h6 += h6;
	h7 += h7;
	h8 += h8;
	h9 += h9;
	carry0 = (h0 + (st64)(1 << 25)) >> 26;
	h1 += carry0;
	h0 -= carry0 * (1LL << 26);
	carry4 = (h4 + (st64)(1 << 25)) >> 26;
	h5 += carry4;
	h4 -= carry4 * (1LL << 26);
	carry1 = (h1 + (st64)(1 << 24)) >> 25;
	h2 += carry1;
	h1 -= carry1 * (1LL << 25);
	carry5 = (h5 + (st64)(1 << 24)) >> 25;
	h6 += carry5;
	h5 -= carry5 * (1LL << 25);
	carry2 = (h2 + (st64)(1 << 25)) >> 26;
	h3 += carry2;
	h2 -= carry2 * (1LL << 26);
	carry6 = (h6 + (st64)(1 << 25)) >> 26;
	h7 += carry6;
	h6 -= carry6 * (1LL << 26);
	carry3 = (h3 + (st64)(1 << 24)) >> 25;
	h4 += carry3;
	h3 -= carry3 * (1LL << 25);
	carry7 = (h7 + (st64)(1 << 24)) >> 25;
	h8 += carry7;
	h7 -= carry7 * (1LL << 25);
	carry4 = (h4 + (st64)(1 << 25)) >> 26;
	h5 += carry4;
	h4 -= carry4 * (1LL << 26);
	carry8 = (h8 + (st64)(1 << 25)) >> 26;
	h9 += carry8;
	h8 -= carry8 * (1LL << 26);
	carry9 = (h9 + (st64)(1 << 24)) >> 25;
	h0 += carry9 * 19;
	h9 -= carry9 * (1LL << 25);
	carry0 = (h0 + (st64)(1 << 25)) >> 26;
	h1 += carry0;
	h0 -= carry0 * (1LL << 26);
	h[0] = (st32)h0;
	h[1] = (st32)h1;
	h[2] = (st32)h2;
	h[3] = (st32)h3;
	h[4] = (st32)h4;
	h[5] = (st32)h5;
	h[6] = (st32)h6;
	h[7] = (st32)h7;
	h[8] = (st32)h8;
	h[9] = (st32)h9;
}

/* h = f - g
 * Can overlap h with f or g.
 * Preconditions:
 * 	|f| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
 * 	|g| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
 *
 * Postconditions:
 * 	|h| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. */
void fe_sub(fe h, const fe f, const fe g) {
	st32 f0 = f[0];
	st32 f1 = f[1];
	st32 f2 = f[2];
	st32 f3 = f[3];
	st32 f4 = f[4];
	st32 f5 = f[5];
	st32 f6 = f[6];
	st32 f7 = f[7];
	st32 f8 = f[8];
	st32 f9 = f[9];
	st32 g0 = g[0];
	st32 g1 = g[1];
	st32 g2 = g[2];
	st32 g3 = g[3];
	st32 g4 = g[4];
	st32 g5 = g[5];
	st32 g6 = g[6];
	st32 g7 = g[7];
	st32 g8 = g[8];
	st32 g9 = g[9];
	st32 h0 = f0 - g0;
	st32 h1 = f1 - g1;
	st32 h2 = f2 - g2;
	st32 h3 = f3 - g3;
	st32 h4 = f4 - g4;
	st32 h5 = f5 - g5;
	st32 h6 = f6 - g6;
	st32 h7 = f7 - g7;
	st32 h8 = f8 - g8;
	st32 h9 = f9 - g9;

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

/* Preconditions:
 * |h| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,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|<2^231 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. */
void fe_tobytes(unsigned char *s, const fe h) {
	st32 h0 = h[0];
	st32 h1 = h[1];
	st32 h2 = h[2];
	st32 h3 = h[3];
	st32 h4 = h[4];
	st32 h5 = h[5];
	st32 h6 = h[6];
	st32 h7 = h[7];
	st32 h8 = h[8];
	st32 h9 = h[9];
	st32 q;
	st32 carry0;
	st32 carry1;
	st32 carry2;
	st32 carry3;
	st32 carry4;
	st32 carry5;
	st32 carry6;
	st32 carry7;
	st32 carry8;
	st32 carry9;
	q = (19 * h9 + (((st32)1) << 24)) >> 25;
	q = (h0 + q) >> 26;
	q = (h1 + q) >> 25;
	q = (h2 + q) >> 26;
	q = (h3 + q) >> 25;
	q = (h4 + q) >> 26;
	q = (h5 + q) >> 25;
	q = (h6 + q) >> 26;
	q = (h7 + q) >> 25;
	q = (h8 + q) >> 26;
	q = (h9 + q) >> 25;
	/* Goal: Output h-(2^255-19)q, which is between 0 and 2^255-20. */
	h0 += 19 * q;
	/* Goal: Output h-2^255 q, which is between 0 and 2^255-20. */
	carry0 = h0 >> 26;
	h1 += carry0;
	h0 -= carry0 * (1LL << 26);
	carry1 = h1 >> 25;
	h2 += carry1;
	h1 -= carry1 * (1LL << 25);
	carry2 = h2 >> 26;
	h3 += carry2;
	h2 -= carry2 * (1LL << 26);
	carry3 = h3 >> 25;
	h4 += carry3;
	h3 -= carry3 * (1LL << 25);
	carry4 = h4 >> 26;
	h5 += carry4;
	h4 -= carry4 * (1LL << 26);
	carry5 = h5 >> 25;
	h6 += carry5;
	h5 -= carry5 * (1LL << 25);
	carry6 = h6 >> 26;
	h7 += carry6;
	h6 -= carry6 * (1LL << 26);
	carry7 = h7 >> 25;
	h8 += carry7;
	h7 -= carry7 * (1LL << 25);
	carry8 = h8 >> 26;
	h9 += carry8;
	h8 -= carry8 * (1LL << 26);
	carry9 = h9 >> 25;
	h9 -= carry9 * (1LL << 25);

	/* h10 = carry9 */
	/* Goal: Output h0+...+2^255 h10-2^255 q, which is between 0 and 2^255-20.
	Have h0+...+2^230 h9 between 0 and 2^255-1;
	evidently 2^255 h10-2^255 q = 0.
	Goal: Output h0+...+2^230 h9. */
	s[0] = (unsigned char)(h0 >> 0);
	s[1] = (unsigned char)(h0 >> 8);
	s[2] = (unsigned char)(h0 >> 16);
	s[3] = (unsigned char)((h0 >> 24) | ((ut32)h1 << 2));
	s[4] = (unsigned char)(h1 >> 6);
	s[5] = (unsigned char)(h1 >> 14);
	s[6] = (unsigned char)((h1 >> 22) | ((ut32)h2 << 3));
	s[7] = (unsigned char)(h2 >> 5);
	s[8] = (unsigned char)(h2 >> 13);
	s[9] = (unsigned char)((h2 >> 21) | ((ut32)h3 << 5));
	s[10] = (unsigned char)(h3 >> 3);
	s[11] = (unsigned char)(h3 >> 11);
	s[12] = (unsigned char)((h3 >> 19) | ((ut32)h4 << 6));
	s[13] = (unsigned char)(h4 >> 2);
	s[14] = (unsigned char)(h4 >> 10);
	s[15] = (unsigned char)(h4 >> 18);
	s[16] = (unsigned char)(h5 >> 0);
	s[17] = (unsigned char)(h5 >> 8);
	s[18] = (unsigned char)(h5 >> 16);
	s[19] = (unsigned char)((h5 >> 24) | ((ut32)h6 << 1));
	s[20] = (unsigned char)(h6 >> 7);
	s[21] = (unsigned char)(h6 >> 15);
	s[22] = (unsigned char)((h6 >> 23) | ((ut32)h7 << 3));
	s[23] = (unsigned char)(h7 >> 5);
	s[24] = (unsigned char)(h7 >> 13);
	s[25] = (unsigned char)((h7 >> 21) | ((ut32)h8 << 4));
	s[26] = (unsigned char)(h8 >> 4);
	s[27] = (unsigned char)(h8 >> 12);
	s[28] = (unsigned char)((h8 >> 20) | ((ut32)h9 << 6));
	s[29] = (unsigned char)(h9 >> 2);
	s[30] = (unsigned char)(h9 >> 10);
	s[31] = (unsigned char)(h9 >> 18);
}