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Use batch inversion in G precomputation

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Peter Dettman
2014-07-02 16:01:26 +07:00
parent 83fd36c6f8
commit f16be77ffc
6 changed files with 190 additions and 25 deletions
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8
src/field.h
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@@ -94,6 +94,14 @@ void static secp256k1_fe_inv(secp256k1_fe_t *r, const secp256k1_fe_t *a);
/** Potentially faster version of secp256k1_fe_inv, without constant-time guarantee. */
void static 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. */
void static 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. */
void static 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. */
void static secp256k1_fe_get_hex(char *r, int *rlen, const secp256k1_fe_t *a);