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optimize sm9 miller loop

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This commit is contained in:
Chengyu Ma
2022-10-18 18:32:18 +08:00
parent 8177f87d84
commit b26fb03c27
1 changed files with 8 additions and 3 deletions
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11
src/sm9_alg.c
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@@ -2015,7 +2015,7 @@ void sm9_final_exponent(sm9_fp12_t r, const sm9_fp12_t f)
}
void sm9_pairing(sm9_fp12_t r, const SM9_TWIST_POINT *Q, const SM9_POINT *P) {
const char *abits = "00100000000000000000000000000000000000010000101011101100100111110";
const char *abits = "00100000000000000000000000000000000000010000101100020200101000020";
SM9_TWIST_POINT _T, *T = &_T;
SM9_TWIST_POINT _Q1, *Q1 = &_Q1;
@@ -2031,9 +2031,8 @@ void sm9_pairing(sm9_fp12_t r, const SM9_TWIST_POINT *Q, const SM9_POINT *P) {
sm9_fp12_set_one(f_num);
sm9_fp12_set_one(f_den);
for (i = 0; i < strlen(abits); i++) {
sm9_fp12_sqr(f_num, f_num);
sm9_fp12_sqr(f_den, f_den);
sm9_eval_g_tangent(g_num, g_den, T, P);
@@ -2047,6 +2046,12 @@ void sm9_pairing(sm9_fp12_t r, const SM9_TWIST_POINT *Q, const SM9_POINT *P) {
sm9_fp12_mul(f_num, f_num, g_num);
sm9_fp12_mul(f_den, f_den, g_den);
sm9_twist_point_add_full(T, T, Q);
} else if (abits[i] == '2') {
sm9_twist_point_neg(Q1, Q);
sm9_eval_g_line(g_num, g_den, T, Q1, P);
sm9_fp12_mul(f_num, f_num, g_num);
sm9_fp12_mul(f_den, f_den, g_den);
sm9_twist_point_add_full(T, T, Q1);
}
}