1 /* This Source Code Form is subject to the terms of the Mozilla Public 2 * License, v. 2.0. If a copy of the MPL was not distributed with this 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 4 5 #ifndef _MP_GF2M_PRIV_H_ 6 #define _MP_GF2M_PRIV_H_ 7 8 #include "mpi-priv.h" 9 10 extern const mp_digit mp_gf2m_sqr_tb[16]; 11 12 #if defined(MP_USE_UINT_DIGIT) 13 #define MP_DIGIT_BITS 32 14 /* enable fast divide and mod operations on MP_DIGIT_BITS */ 15 #define MP_DIGIT_BITS_LOG_2 5 16 #define MP_DIGIT_BITS_MASK 0x1f 17 #else 18 #define MP_DIGIT_BITS 64 19 /* enable fast divide and mod operations on MP_DIGIT_BITS */ 20 #define MP_DIGIT_BITS_LOG_2 6 21 #define MP_DIGIT_BITS_MASK 0x3f 22 #endif 23 24 /* Platform-specific macros for fast binary polynomial squaring. */ 25 #if MP_DIGIT_BITS == 32 26 #define gf2m_SQR1(w) \ 27 mp_gf2m_sqr_tb[(w) >> 28 & 0xF] << 24 | mp_gf2m_sqr_tb[(w) >> 24 & 0xF] << 16 | \ 28 mp_gf2m_sqr_tb[(w) >> 20 & 0xF] << 8 | mp_gf2m_sqr_tb[(w) >> 16 & 0xF] 29 #define gf2m_SQR0(w) \ 30 mp_gf2m_sqr_tb[(w) >> 12 & 0xF] << 24 | mp_gf2m_sqr_tb[(w) >> 8 & 0xF] << 16 | \ 31 mp_gf2m_sqr_tb[(w) >> 4 & 0xF] << 8 | mp_gf2m_sqr_tb[(w)&0xF] 32 #else 33 #define gf2m_SQR1(w) \ 34 mp_gf2m_sqr_tb[(w) >> 60 & 0xF] << 56 | mp_gf2m_sqr_tb[(w) >> 56 & 0xF] << 48 | \ 35 mp_gf2m_sqr_tb[(w) >> 52 & 0xF] << 40 | mp_gf2m_sqr_tb[(w) >> 48 & 0xF] << 32 | \ 36 mp_gf2m_sqr_tb[(w) >> 44 & 0xF] << 24 | mp_gf2m_sqr_tb[(w) >> 40 & 0xF] << 16 | \ 37 mp_gf2m_sqr_tb[(w) >> 36 & 0xF] << 8 | mp_gf2m_sqr_tb[(w) >> 32 & 0xF] 38 #define gf2m_SQR0(w) \ 39 mp_gf2m_sqr_tb[(w) >> 28 & 0xF] << 56 | mp_gf2m_sqr_tb[(w) >> 24 & 0xF] << 48 | \ 40 mp_gf2m_sqr_tb[(w) >> 20 & 0xF] << 40 | mp_gf2m_sqr_tb[(w) >> 16 & 0xF] << 32 | \ 41 mp_gf2m_sqr_tb[(w) >> 12 & 0xF] << 24 | mp_gf2m_sqr_tb[(w) >> 8 & 0xF] << 16 | \ 42 mp_gf2m_sqr_tb[(w) >> 4 & 0xF] << 8 | mp_gf2m_sqr_tb[(w)&0xF] 43 #endif 44 45 /* Multiply two binary polynomials mp_digits a, b. 46 * Result is a polynomial with degree < 2 * MP_DIGIT_BITS - 1. 47 * Output in two mp_digits rh, rl. 48 */ 49 void s_bmul_1x1(mp_digit *rh, mp_digit *rl, const mp_digit a, const mp_digit b); 50 51 /* Compute xor-multiply of two binary polynomials (a1, a0) x (b1, b0) 52 * result is a binary polynomial in 4 mp_digits r[4]. 53 * The caller MUST ensure that r has the right amount of space allocated. 54 */ 55 void s_bmul_2x2(mp_digit *r, const mp_digit a1, const mp_digit a0, const mp_digit b1, 56 const mp_digit b0); 57 58 /* Compute xor-multiply of two binary polynomials (a2, a1, a0) x (b2, b1, b0) 59 * result is a binary polynomial in 6 mp_digits r[6]. 60 * The caller MUST ensure that r has the right amount of space allocated. 61 */ 62 void s_bmul_3x3(mp_digit *r, const mp_digit a2, const mp_digit a1, const mp_digit a0, 63 const mp_digit b2, const mp_digit b1, const mp_digit b0); 64 65 /* Compute xor-multiply of two binary polynomials (a3, a2, a1, a0) x (b3, b2, b1, b0) 66 * result is a binary polynomial in 8 mp_digits r[8]. 67 * The caller MUST ensure that r has the right amount of space allocated. 68 */ 69 void s_bmul_4x4(mp_digit *r, const mp_digit a3, const mp_digit a2, const mp_digit a1, 70 const mp_digit a0, const mp_digit b3, const mp_digit b2, const mp_digit b1, 71 const mp_digit b0); 72 73 #endif /* _MP_GF2M_PRIV_H_ */ 74