зеркало из https://github.com/mozilla/libprio.git
74 строки
3.4 KiB
C
74 строки
3.4 KiB
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef _MP_GF2M_PRIV_H_
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#define _MP_GF2M_PRIV_H_
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#include "mpi-priv.h"
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extern const mp_digit mp_gf2m_sqr_tb[16];
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#if defined(MP_USE_UINT_DIGIT)
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#define MP_DIGIT_BITS 32
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/* enable fast divide and mod operations on MP_DIGIT_BITS */
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#define MP_DIGIT_BITS_LOG_2 5
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#define MP_DIGIT_BITS_MASK 0x1f
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#else
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#define MP_DIGIT_BITS 64
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/* enable fast divide and mod operations on MP_DIGIT_BITS */
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#define MP_DIGIT_BITS_LOG_2 6
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#define MP_DIGIT_BITS_MASK 0x3f
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#endif
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/* Platform-specific macros for fast binary polynomial squaring. */
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#if MP_DIGIT_BITS == 32
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#define gf2m_SQR1(w) \
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mp_gf2m_sqr_tb[(w) >> 28 & 0xF] << 24 | mp_gf2m_sqr_tb[(w) >> 24 & 0xF] << 16 | \
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mp_gf2m_sqr_tb[(w) >> 20 & 0xF] << 8 | mp_gf2m_sqr_tb[(w) >> 16 & 0xF]
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#define gf2m_SQR0(w) \
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mp_gf2m_sqr_tb[(w) >> 12 & 0xF] << 24 | mp_gf2m_sqr_tb[(w) >> 8 & 0xF] << 16 | \
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mp_gf2m_sqr_tb[(w) >> 4 & 0xF] << 8 | mp_gf2m_sqr_tb[(w)&0xF]
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#else
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#define gf2m_SQR1(w) \
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mp_gf2m_sqr_tb[(w) >> 60 & 0xF] << 56 | mp_gf2m_sqr_tb[(w) >> 56 & 0xF] << 48 | \
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mp_gf2m_sqr_tb[(w) >> 52 & 0xF] << 40 | mp_gf2m_sqr_tb[(w) >> 48 & 0xF] << 32 | \
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mp_gf2m_sqr_tb[(w) >> 44 & 0xF] << 24 | mp_gf2m_sqr_tb[(w) >> 40 & 0xF] << 16 | \
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mp_gf2m_sqr_tb[(w) >> 36 & 0xF] << 8 | mp_gf2m_sqr_tb[(w) >> 32 & 0xF]
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#define gf2m_SQR0(w) \
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mp_gf2m_sqr_tb[(w) >> 28 & 0xF] << 56 | mp_gf2m_sqr_tb[(w) >> 24 & 0xF] << 48 | \
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mp_gf2m_sqr_tb[(w) >> 20 & 0xF] << 40 | mp_gf2m_sqr_tb[(w) >> 16 & 0xF] << 32 | \
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mp_gf2m_sqr_tb[(w) >> 12 & 0xF] << 24 | mp_gf2m_sqr_tb[(w) >> 8 & 0xF] << 16 | \
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mp_gf2m_sqr_tb[(w) >> 4 & 0xF] << 8 | mp_gf2m_sqr_tb[(w)&0xF]
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#endif
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/* Multiply two binary polynomials mp_digits a, b.
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* Result is a polynomial with degree < 2 * MP_DIGIT_BITS - 1.
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* Output in two mp_digits rh, rl.
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*/
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void s_bmul_1x1(mp_digit *rh, mp_digit *rl, const mp_digit a, const mp_digit b);
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/* Compute xor-multiply of two binary polynomials (a1, a0) x (b1, b0)
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* result is a binary polynomial in 4 mp_digits r[4].
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* The caller MUST ensure that r has the right amount of space allocated.
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*/
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void s_bmul_2x2(mp_digit *r, const mp_digit a1, const mp_digit a0, const mp_digit b1,
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const mp_digit b0);
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/* Compute xor-multiply of two binary polynomials (a2, a1, a0) x (b2, b1, b0)
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* result is a binary polynomial in 6 mp_digits r[6].
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* The caller MUST ensure that r has the right amount of space allocated.
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*/
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void s_bmul_3x3(mp_digit *r, const mp_digit a2, const mp_digit a1, const mp_digit a0,
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const mp_digit b2, const mp_digit b1, const mp_digit b0);
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/* Compute xor-multiply of two binary polynomials (a3, a2, a1, a0) x (b3, b2, b1, b0)
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* result is a binary polynomial in 8 mp_digits r[8].
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* The caller MUST ensure that r has the right amount of space allocated.
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*/
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void s_bmul_4x4(mp_digit *r, const mp_digit a3, const mp_digit a2, const mp_digit a1,
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const mp_digit a0, const mp_digit b3, const mp_digit b2, const mp_digit b1,
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const mp_digit b0);
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#endif /* _MP_GF2M_PRIV_H_ */
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