void fp12_mul_lazyr(fp12_t c, fp12_t a, fp12_t b) {
dv6_t u0, u1, u2, u3;
fp6_t t0, t1;
dv6_null(u0);
dv6_null(u1);
dv6_null(u2);
dv6_null(u3);
fp6_null(t0);
fp6_null(t0);
fp6_null(t1);
TRY {
dv6_new(u0);
dv6_new(u1);
dv6_new(u2);
dv6_new(u3);
fp6_new(t0);
fp6_new(t1);
/* Karatsuba algorithm. */
/* u0 = a_0 * b_0. */
fp6_mul_unr(u0, a[0], b[0]);
/* u1 = a_1 * b_1. */
fp6_mul_unr(u1, a[1], b[1]);
/* t1 = a_0 + a_1. */
fp6_add(t0, a[0], a[1]);
/* t0 = b_0 + b_1. */
fp6_add(t1, b[0], b[1]);
/* u2 = (a_0 + a_1) * (b_0 + b_1) */
fp6_mul_unr(u2, t0, t1);
/* c_1 = u2 - a_0b_0 - a_1b_1. */
for (int i = 0; i < 3; i++) {
fp2_addc_low(u3[i], u0[i], u1[i]);
fp2_subc_low(u2[i], u2[i], u3[i]);
fp2_rdcn_low(c[1][i], u2[i]);
}
/* c_0 = a_0b_0 + v * a_1b_1. */
fp2_nord_low(u2[0], u1[2]);
dv_copy(u2[1][0], u1[0][0], 2 * RLC_FP_DIGS);
dv_copy(u2[1][1], u1[0][1], 2 * RLC_FP_DIGS);
dv_copy(u2[2][0], u1[1][0], 2 * RLC_FP_DIGS);
dv_copy(u2[2][1], u1[1][1], 2 * RLC_FP_DIGS);
for (int i = 0; i < 3; i++) {
fp2_addc_low(u2[i], u0[i], u2[i]);
fp2_rdcn_low(c[0][i], u2[i]);
}
} CATCH_ANY {
THROW(ERR_CAUGHT);
} FINALLY {
dv6_free(u0);
dv6_free(u1);
dv6_free(u2);
dv6_free(u3);
fp6_free(t0);
fp6_free(t1);
}
}
void fp8_sqr_lazyr(fp8_t c, fp8_t a) {
fp4_t t;
dv4_t u0, u1, u2;
fp4_null(t);
dv4_null(u0);
dv4_null(u1);
dv4_null(u2);
TRY {
fp4_new(t);
dv4_new(u0);
dv4_new(u1);
dv4_new(u2);
/* t0 = a^2. */
fp4_sqr_unr(u0, a[0]);
/* t1 = b^2. */
fp4_sqr_unr(u1, a[1]);
fp4_add(t, a[0], a[1]);
/* c = a^2 + b^2 * E. */
dv_copy(u2[1][0], u1[0][0], 2 * RLC_FP_DIGS);
dv_copy(u2[1][1], u1[0][1], 2 * RLC_FP_DIGS);
fp2_nord_low(u2[0], u1[1]);
fp2_addc_low(u2[0], u2[0], u0[0]);
fp2_addc_low(u2[1], u2[1], u0[1]);
/* d = (a + b)^2 - a^2 - b^2 = 2 * a * b. */
fp2_addc_low(u1[0], u1[0], u0[0]);
fp2_addc_low(u1[1], u1[1], u0[1]);
fp4_sqr_unr(u0, t);
fp2_subc_low(u0[0], u0[0], u1[0]);
fp2_subc_low(u0[1], u0[1], u1[1]);
fp2_rdcn_low(c[0][0], u2[0]);
fp2_rdcn_low(c[0][1], u2[1]);
fp2_rdcn_low(c[1][0], u0[0]);
fp2_rdcn_low(c[1][1], u0[1]);
} CATCH_ANY {
THROW(ERR_CAUGHT);
} FINALLY {
fp4_free(t);
dv4_free(u0);
dv4_free(u1);
dv4_free(u2);
}
}
void fp2_mulm_low(fp2_t c, fp2_t a, fp2_t b) {
align dv2_t t;
dv2_null(t);
TRY {
dv2_new(t);
fp2_muln_low(t, a, b);
fp2_rdcn_low(c, t);
} CATCH_ANY {
THROW(ERR_CAUGHT);
} FINALLY {
dv2_free(t);
}
}
void fp2_sqrm_low(fp2_t c, fp2_t a) {
align dv2_t t;
dv2_null(t);
TRY {
dv2_new(t);
fp2_sqrn_low(t, a);
fp2_rdcn_low(c, t);
} CATCH_ANY {
THROW(ERR_CAUGHT);
} FINALLY {
dv2_free(t);
}
}
void fp12_mul_dxs_lazyr(fp12_t c, fp12_t a, fp12_t b) {
fp6_t t0;
dv6_t u0, u1, u2;
fp6_null(t0);
dv6_null(u0);
dv6_null(u1);
dv6_null(u2);
TRY {
fp6_new(t0);
dv6_new(u0);
dv6_new(u1);
dv6_new(u2);
if (ep2_curve_is_twist() == EP_DTYPE) {
#if EP_ADD == BASIC
/* t0 = a_0 * b_0. */
fp_muln_low(u0[0][0], a[0][0][0], b[0][0][0]);
fp_muln_low(u0[0][1], a[0][0][1], b[0][0][0]);
fp_muln_low(u0[1][0], a[0][1][0], b[0][0][0]);
fp_muln_low(u0[1][1], a[0][1][1], b[0][0][0]);
fp_muln_low(u0[2][0], a[0][2][0], b[0][0][0]);
fp_muln_low(u0[2][1], a[0][2][1], b[0][0][0]);
/* t2 = b_0 + b_1. */
fp_add(t0[0][0], b[0][0][0], b[1][0][0]);
fp_copy(t0[0][1], b[1][0][1]);
fp2_copy(t0[1], b[1][1]);
#elif EP_ADD == PROJC
/* t0 = a_0 * b_0. */
#ifdef RLC_FP_ROOM
fp2_mulc_low(u0[0], a[0][0], b[0][0]);
fp2_mulc_low(u0[1], a[0][1], b[0][0]);
fp2_mulc_low(u0[2], a[0][2], b[0][0]);
#else
fp2_muln_low(u0[0], a[0][0], b[0][0]);
fp2_muln_low(u0[1], a[0][1], b[0][0]);
fp2_muln_low(u0[2], a[0][2], b[0][0]);
#endif
/* t2 = b_0 + b_1. */
fp2_add(t0[0], b[0][0], b[1][0]);
fp2_copy(t0[1], b[1][1]);
#endif
/* t1 = a_1 * b_1. */
fp6_mul_dxs_unr_lazyr(u1, a[1], b[1]);
} else {
/* t0 = a_0 * b_0. */
fp6_mul_dxs_unr_lazyr(u0, a[0], b[0]);
#if EP_ADD == BASIC
/* t0 = a_0 * b_0. */
fp_muln_low(u1[1][0], a[1][2][0], b[1][1][0]);
fp_muln_low(u1[1][1], a[1][2][1], b[1][1][0]);
fp2_nord_low(u1[0], u1[1]);
fp_muln_low(u1[1][0], a[1][0][0], b[1][1][0]);
fp_muln_low(u1[1][1], a[1][0][1], b[1][1][0]);
fp_muln_low(u1[2][0], a[1][1][0], b[1][1][0]);
fp_muln_low(u1[2][1], a[1][1][1], b[1][1][0]);
/* t2 = b_0 + b_1. */
fp2_copy(t0[0], b[0][0]);
fp_add(t0[1][0], b[0][1][0], b[1][1][0]);
fp_copy(t0[1][1], b[0][1][1]);
#elif EP_ADD == PROJC
/* t1 = a_1 * b_1. */
fp2_muln_low(u1[1], a[1][2], b[1][1]);
fp2_nord_low(u1[0], u1[1]);
fp2_muln_low(u1[1], a[1][0], b[1][1]);
fp2_muln_low(u1[2], a[1][1], b[1][1]);
/* t2 = b_0 + b_1. */
fp2_copy(t0[0], b[0][0]);
fp2_add(t0[1], b[0][1], b[1][1]);
#endif
}
/* c_1 = a_0 + a_1. */
fp6_add(c[1], a[0], a[1]);
/* c_1 = (a_0 + a_1) * (b_0 + b_1) */
fp6_mul_dxs_unr_lazyr(u2, c[1], t0);
for (int i = 0; i < 3; i++) {
fp2_subc_low(u2[i], u2[i], u0[i]);
fp2_subc_low(u2[i], u2[i], u1[i]);
}
fp2_rdcn_low(c[1][0], u2[0]);
fp2_rdcn_low(c[1][1], u2[1]);
fp2_rdcn_low(c[1][2], u2[2]);
fp2_nord_low(u2[0], u1[2]);
fp2_addc_low(u0[0], u0[0], u2[0]);
fp2_addc_low(u0[1], u0[1], u1[0]);
fp2_addc_low(u0[2], u0[2], u1[1]);
/* c_0 = a_0b_0 + v * a_1b_1. */
fp2_rdcn_low(c[0][0], u0[0]);
fp2_rdcn_low(c[0][1], u0[1]);
fp2_rdcn_low(c[0][2], u0[2]);
} CATCH_ANY {
THROW(ERR_CAUGHT);
} FINALLY {
fp6_free(t0);
dv6_free(u0);
dv6_free(u1);
dv6_free(u2);
}
}
void fp2_rdc_integ(fp2_t c, dv2_t a) {
fp2_rdcn_low(c, a);
}
void pp_dbl_k12_projc_lazyr(fp12_t l, ep2_t r, ep2_t q, ep_t p) {
fp2_t t0, t1, t2, t3, t4, t5, t6;
dv2_t u0, u1;
int one = 1, zero = 0;
fp2_null(t0);
fp2_null(t1);
fp2_null(t2);
fp2_null(t3);
fp2_null(t4);
fp2_null(t5);
fp2_null(t6);
dv2_null(u0);
dv2_null(u1);
TRY {
fp2_new(t0);
fp2_new(t1);
fp2_new(t2);
fp2_new(t3);
fp2_new(t4);
fp2_new(t5);
fp2_new(t6);
dv2_new(u0);
dv2_new(u1);
if (ep2_curve_is_twist() == EP_MTYPE) {
one ^= 1;
zero ^= 1;
}
if (ep_curve_opt_b() == RLC_TWO) {
/* C = z1^2. */
fp2_sqr(t0, q->z);
/* B = y1^2. */
fp2_sqr(t1, q->y);
/* t5 = B + C. */
fp2_add(t5, t0, t1);
/* t3 = E = 3b'C = 3C * (1 - i). */
fp2_dbl(t3, t0);
fp2_add(t0, t0, t3);
fp_add(t2[0], t0[0], t0[1]);
fp_sub(t2[1], t0[1], t0[0]);
/* t0 = x1^2. */
fp2_sqr(t0, q->x);
/* t4 = A = (x1 * y1)/2. */
fp2_mul(t4, q->x, q->y);
fp_hlv(t4[0], t4[0]);
fp_hlv(t4[1], t4[1]);
/* t3 = F = 3E. */
fp2_dbl(t3, t2);
fp2_add(t3, t3, t2);
/* x3 = A * (B - F). */
fp2_sub(r->x, t1, t3);
fp2_mul(r->x, r->x, t4);
/* G = (B + F)/2. */
fp2_add(t3, t1, t3);
fp_hlv(t3[0], t3[0]);
fp_hlv(t3[1], t3[1]);
/* y3 = G^2 - 3E^2. */
fp2_sqrn_low(u0, t2);
fp2_addd_low(u1, u0, u0);
fp2_addd_low(u1, u1, u0);
fp2_sqrn_low(u0, t3);
fp2_subc_low(u0, u0, u1);
/* H = (Y + Z)^2 - B - C. */
fp2_add(t3, q->y, q->z);
fp2_sqr(t3, t3);
fp2_sub(t3, t3, t5);
fp2_rdcn_low(r->y, u0);
/* z3 = B * H. */
fp2_mul(r->z, t1, t3);
/* l11 = E - B. */
fp2_sub(l[1][1], t2, t1);
/* l10 = (3 * xp) * t0. */
fp_mul(l[one][zero][0], p->x, t0[0]);
fp_mul(l[one][zero][1], p->x, t0[1]);
/* l01 = F * (-yp). */
fp_mul(l[zero][zero][0], t3[0], p->y);
fp_mul(l[zero][zero][1], t3[1], p->y);
} else {
/* A = x1^2. */
fp2_sqr(t0, q->x);
/* B = y1^2. */
fp2_sqr(t1, q->y);
/* C = z1^2. */
fp2_sqr(t2, q->z);
/* D = 3bC, for general b. */
fp2_dbl(t3, t2);
fp2_add(t3, t3, t2);
ep2_curve_get_b(t4);
fp2_mul(t3, t3, t4);
/* E = (x1 + y1)^2 - A - B. */
fp2_add(t4, q->x, q->y);
fp2_sqr(t4, t4);
fp2_sub(t4, t4, t0);
fp2_sub(t4, t4, t1);
/* F = (y1 + z1)^2 - B - C. */
fp2_add(t5, q->y, q->z);
fp2_sqr(t5, t5);
fp2_sub(t5, t5, t1);
fp2_sub(t5, t5, t2);
/* G = 3D. */
fp2_dbl(t6, t3);
fp2_add(t6, t6, t3);
/* x3 = E * (B - G). */
fp2_sub(r->x, t1, t6);
fp2_mul(r->x, r->x, t4);
/* y3 = (B + G)^2 -12D^2. */
fp2_add(t6, t6, t1);
fp2_sqr(t6, t6);
fp2_sqr(t2, t3);
fp2_dbl(r->y, t2);
fp2_dbl(t2, r->y);
fp2_dbl(r->y, t2);
fp2_add(r->y, r->y, t2);
fp2_sub(r->y, t6, r->y);
/* z3 = 4B * F. */
fp2_dbl(r->z, t1);
fp2_dbl(r->z, r->z);
fp2_mul(r->z, r->z, t5);
/* l00 = D - B. */
fp2_sub(l[one][one], t3, t1);
/* l10 = (3 * xp) * A. */
fp_mul(l[one][zero][0], p->x, t0[0]);
fp_mul(l[one][zero][1], p->x, t0[1]);
/* l01 = F * (-yp). */
fp_mul(l[zero][zero][0], t5[0], p->y);
fp_mul(l[zero][zero][1], t5[1], p->y);
}
r->norm = 0;
}
CATCH_ANY {
THROW(ERR_CAUGHT);
}
FINALLY {
fp2_free(t0);
fp2_free(t1);
fp2_free(t2);
fp2_free(t3);
fp2_free(t4);
fp2_free(t5);
fp2_free(t6);
dv2_free(u0);
dv2_free(u1);
}
}
void fp12_sqr_pck_lazyr(fp12_t c, fp12_t a) {
fp2_t t0, t1;
dv2_t u0, u1, u2, u3, u4;
fp2_null(t0);
fp2_null(t1);
dv2_null(u0);
dv2_null(u1);
dv2_null(u2);
dv2_null(u3);
dv2_null(u4);
TRY {
fp2_new(t0);
fp2_new(t1);
dv2_new(u0);
dv2_new(u1);
dv2_new(u2);
dv2_new(u3);
dv2_new(u4);
fp2_sqrn_low(u0, a[0][1]);
fp2_sqrn_low(u1, a[1][2]);
fp2_norh_low(u4, u1);
fp2_addm_low(t0, a[0][1], a[1][2]);
fp2_sqrn_low(u2, t0);
fp2_addd_low(u3, u0, u1);
fp2_subc_low(u3, u2, u3);
fp2_rdcn_low(t0, u3);
fp2_sqrn_low(u2, a[1][0]);
fp2_addm_low(t1, a[1][0], a[0][2]);
fp2_sqrn_low(u3, t1);
fp2_norm_low(t1, t0);
fp2_addm_low(t0, t1, a[1][0]);
fp2_dblm_low(t0, t0);
fp2_addm_low(c[1][0], t0, t1);
fp2_sqrn_low(u1, a[0][2]);
fp2_addc_low(u4, u0, u4);
fp2_rdcn_low(t0, u4);
fp2_subm_low(t1, t0, a[0][2]);
fp2_dblm_low(t1, t1);
fp2_norh_low(u4, u1);
fp2_addm_low(c[0][2], t1, t0);
fp2_addc_low(u4, u2, u4);
fp2_rdcn_low(t0, u4);
fp2_subm_low(t1, t0, a[0][1]);
fp2_dblm_low(t1, t1);
fp2_addd_low(u0, u1, u2);
fp2_addm_low(c[0][1], t1, t0);
fp2_subc_low(u3, u3, u0);
fp2_rdcn_low(t0, u3);
fp2_addm_low(t1, t0, a[1][2]);
fp2_dblm_low(t1, t1);
fp2_addm_low(c[1][2], t1, t0);
} CATCH_ANY {
THROW(ERR_CAUGHT);
} FINALLY {
fp2_free(t0);
fp2_free(t1);
dv2_free(u0);
dv2_free(u1);
dv2_free(u2);
dv2_free(u3);
dv2_free(u4);
}
}
void fp12_sqr_lazyr(fp12_t c, fp12_t a) {
fp2_t t0, t1, t2, t3;
dv2_t u0, u1, u2, u3, u4, u5, u6, u7, u8, u9;
fp2_null(t0);
fp2_null(t1);
fp2_null(t2);
fp2_null(t3);
dv2_null(u0);
dv2_null(u1);
dv2_null(u2);
dv2_null(u3);
dv2_null(u4);
dv2_null(u5);
dv2_null(u6);
dv2_null(u7);
dv2_null(u8);
dv2_null(u9);
TRY {
fp2_new(t0);
fp2_new(t1);
fp2_new(t2);
fp2_new(t3);
dv2_new(u0);
dv2_new(u1);
dv2_new(u2);
dv2_new(u3);
dv2_new(u4);
dv2_new(u5);
dv2_new(u6);
dv2_new(u7);
dv2_new(u8);
dv2_new(u9);
/* a0 = (a00, a11). */
/* a1 = (a10, a02). */
/* a2 = (a01, a12). */
/* (t0,t1) = a0^2 */
fp4_sqr_unr(u0, u1, a[0][0], a[1][1]);
/* (t2,t3) = 2 * a1 * a2 */
fp4_mul_unr(u2, u3, a[1][0], a[0][2], a[0][1], a[1][2]);
fp2_addc_low(u2, u2, u2);
fp2_addc_low(u3, u3, u3);
/* (t4,t5) = a2^2. */
fp4_sqr_unr(u4, u5, a[0][1], a[1][2]);
/* c2 = a0 + a2. */
fp2_addm_low(t2, a[0][0], a[0][1]);
fp2_addm_low(t3, a[1][1], a[1][2]);
/* (t6,t7) = (a0 + a2 + a1)^2. */
fp2_addm_low(t0, t2, a[1][0]);
fp2_addm_low(t1, t3, a[0][2]);
fp4_sqr_unr(u6, u7, t0, t1);
/* c2 = (a0 + a2 - a1)^2. */
fp2_subm_low(t2, t2, a[1][0]);
fp2_subm_low(t3, t3, a[0][2]);
fp4_sqr_unr(u8, u9, t2, t3);
/* c2 = (c2 + (t6,t7))/2. */
#ifdef FP_SPACE
fp2_addd_low(u8, u8, u6);
fp2_addd_low(u9, u9, u7);
#else
fp2_addc_low(u8, u8, u6);
fp2_addc_low(u9, u9, u7);
#endif
fp_hlvd_low(u8[0], u8[0]);
fp_hlvd_low(u8[1], u8[1]);
fp_hlvd_low(u9[0], u9[0]);
fp_hlvd_low(u9[1], u9[1]);
/* (t6,t7) = (t6,t7) - c2 - (t2,t3). */
fp2_subc_low(u6, u6, u8);
fp2_subc_low(u7, u7, u9);
fp2_subc_low(u6, u6, u2);
fp2_subc_low(u7, u7, u3);
/* c2 = c2 - (t0,t1) - (t4,t5). */
fp2_subc_low(u8, u8, u0);
fp2_subc_low(u9, u9, u1);
fp2_subc_low(u8, u8, u4);
fp2_subc_low(u9, u9, u5);
fp2_rdcn_low(c[0][1], u8);
fp2_rdcn_low(c[1][2], u9);
/* c1 = (t6,t7) + (t4,t5) * E. */
fp2_nord_low(u9, u5);
fp2_addc_low(u6, u6, u9);
fp2_addc_low(u7, u7, u4);
fp2_rdcn_low(c[1][0], u6);
fp2_rdcn_low(c[0][2], u7);
/* c0 = (t0,t1) + (t2,t3) * E. */
fp2_nord_low(u9, u3);
fp2_addc_low(u0, u0, u9);
fp2_addc_low(u1, u1, u2);
fp2_rdcn_low(c[0][0], u0);
fp2_rdcn_low(c[1][1], u1);
} CATCH_ANY {
THROW(ERR_CAUGHT);
} FINALLY {
fp2_free(t0);
fp2_free(t1);
fp2_free(t2);
fp2_free(t3);
dv2_free(u0);
dv2_free(u1);
dv2_free(u2);
dv2_free(u3);
dv2_free(u4);
dv2_free(u5);
dv2_free(u6);
dv2_free(u7);
dv2_free(u8);
dv2_free(u9);
}
}
