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secp256k1
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Remove unused secp256k1_fe_inv_all

This commit is contained in:
Pieter Wuille 2014-12-05 18:13:51 +01:00
parent f461b76925
commit 2b9388b647
3 changed files with 0 additions and 45 deletions
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3
src/field.h
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@ -105,9 +105,6 @@ static void secp256k1_fe_inv_var(secp256k1_fe_t *r, const secp256k1_fe_t *a);
/** Calculate the (modular) inverses of a batch of field elements. Requires the inputs' magnitudes to be
* at most 8. The output magnitudes are 1 (but not guaranteed to be normalized). The inputs and
* outputs must not overlap in memory. */
static void secp256k1_fe_inv_all(size_t len, secp256k1_fe_t r[len], const secp256k1_fe_t a[len]);
/** Potentially faster version of secp256k1_fe_inv_all, without constant-time guarantee. */
static void secp256k1_fe_inv_all_var(size_t len, secp256k1_fe_t r[len], const secp256k1_fe_t a[len]);
/** Convert a field element to a hexadecimal string. */

24
src/field_impl.h
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@ -218,30 +218,6 @@ static void secp256k1_fe_inv_var(secp256k1_fe_t *r, const secp256k1_fe_t *a) {
#endif
}
static void secp256k1_fe_inv_all(size_t len, secp256k1_fe_t r[len], const secp256k1_fe_t a[len]) {
if (len < 1)
return;
VERIFY_CHECK((r + len <= a) || (a + len <= r));
r[0] = a[0];
size_t i = 0;
while (++i < len) {
secp256k1_fe_mul(&r[i], &r[i - 1], &a[i]);
}
secp256k1_fe_t u; secp256k1_fe_inv(&u, &r[--i]);
while (i > 0) {
int j = i--;
secp256k1_fe_mul(&r[j], &r[i], &u);
secp256k1_fe_mul(&u, &u, &a[j]);
}
r[0] = u;
}
static void secp256k1_fe_inv_all_var(size_t len, secp256k1_fe_t r[len], const secp256k1_fe_t a[len]) {
if (len < 1)
return;

18
src/tests.c
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@ -498,23 +498,6 @@ void run_field_inv_var(void) {
}
}
void run_field_inv_all(void) {
secp256k1_fe_t x[16], xi[16], xii[16];
/* Check it's safe to call for 0 elements */
secp256k1_fe_inv_all(0, xi, x);
for (int i=0; i<count; i++) {
size_t len = (secp256k1_rand32() & 15) + 1;
for (size_t j=0; j<len; j++)
random_fe_non_zero(&x[j]);
secp256k1_fe_inv_all(len, xi, x);
for (size_t j=0; j<len; j++)
CHECK(check_fe_inverse(&x[j], &xi[j]));
secp256k1_fe_inv_all(len, xii, xi);
for (size_t j=0; j<len; j++)
CHECK(check_fe_equal(&x[j], &xii[j]));
}
}
void run_field_inv_all_var(void) {
secp256k1_fe_t x[16], xi[16], xii[16];
/* Check it's safe to call for 0 elements */
@ -1185,7 +1168,6 @@ int main(int argc, char **argv) {
/* field tests */
run_field_inv();
run_field_inv_var();
run_field_inv_all();
run_field_inv_all_var();
run_sqr();
run_sqrt();