36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
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/***********************************************************************
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* Copyright (c) 2020 Peter Dettman *
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* Distributed under the MIT software license, see the accompanying *
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* file COPYING or https://www.opensource.org/licenses/mit-license.php.*
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**********************************************************************/
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#ifndef SECP256K1_MODINV64_H
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#define SECP256K1_MODINV64_H
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#if defined HAVE_CONFIG_H
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#include "libsecp256k1-config.h"
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#endif
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#include "util.h"
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#ifndef SECP256K1_WIDEMUL_INT128
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#error "modinv64 requires 128-bit wide multiplication support"
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#endif
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typedef struct {
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int64_t v[5];
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} secp256k1_modinv64_signed62;
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typedef struct {
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/* The modulus in signed62 notation. */
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secp256k1_modinv64_signed62 modulus;
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/* modulus^{-1} mod 2^62 */
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uint64_t modulus_inv62;
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} secp256k1_modinv64_modinfo;
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static void secp256k1_modinv64(secp256k1_modinv64_signed62 *x, const secp256k1_modinv64_modinfo *modinfo);
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static void secp256k1_modinv64_var(secp256k1_modinv64_signed62 *x, const secp256k1_modinv64_modinfo *modinfo);
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#endif /* SECP256K1_MODINV64_H */
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