87 lines
3.1 KiB
C
87 lines
3.1 KiB
C
// donna_sse.h - written and placed in public domain by Jeffrey Walton
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// Crypto++ specific implementation wrapped around Andrew
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// Moon's public domain curve25519-donna and ed25519-donna,
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// https://github.com/floodyberry/curve25519-donna and
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// https://github.com/floodyberry/ed25519-donna.
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// This source file multiplexes two different repos using namespaces. This
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// was a little easier from a project management standpoint. We only need
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// two files per architecture at the expense of namespaces and bloat.
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#ifndef CRYPTOPP_DONNA_SSE_H
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#define CRYPTOPP_DONNA_SSE_H
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#ifndef CRYPTOPP_DOXYGEN_PROCESSING
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#include "config.h"
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#include <emmintrin.h>
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NAMESPACE_BEGIN(CryptoPP)
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NAMESPACE_BEGIN(Donna)
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NAMESPACE_BEGIN(ArchSSE)
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using CryptoPP::byte;
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using CryptoPP::word32;
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typedef __m128i xmmi;
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#define ALIGN(n) CRYPTOPP_ALIGN_DATA(n)
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typedef union packedelem8_t {
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byte u[16];
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xmmi v;
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} packedelem8;
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typedef union packedelem32_t {
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word32 u[4];
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xmmi v;
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} packedelem32;
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typedef union packedelem64_t {
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word64 u[2];
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xmmi v;
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} packedelem64;
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/* 10 elements + an extra 2 to fit in 3 xmm registers */
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typedef word32 bignum25519[12];
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typedef packedelem32 packed32bignum25519[5];
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typedef packedelem64 packed64bignum25519[10];
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const word32 reduce_mask_26 = (1 << 26) - 1;
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const word32 reduce_mask_25 = (1 << 25) - 1;
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const packedelem32 sse2_bot32bitmask = {{0xffffffff, 0x00000000, 0xffffffff, 0x00000000}};
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const packedelem32 sse2_top32bitmask = {{0x00000000, 0xffffffff, 0x00000000, 0xffffffff}};
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const packedelem32 sse2_top64bitmask = {{0x00000000, 0x00000000, 0xffffffff, 0xffffffff}};
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const packedelem32 sse2_bot64bitmask = {{0xffffffff, 0xffffffff, 0x00000000, 0x00000000}};
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/* reduction masks */
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const packedelem64 packedmask26 = {{0x03ffffff, 0x03ffffff}};
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const packedelem64 packedmask25 = {{0x01ffffff, 0x01ffffff}};
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const packedelem32 packedmask2625 = {{0x3ffffff,0,0x1ffffff,0}};
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const packedelem32 packedmask26262626 = {{0x03ffffff, 0x03ffffff, 0x03ffffff, 0x03ffffff}};
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const packedelem32 packedmask25252525 = {{0x01ffffff, 0x01ffffff, 0x01ffffff, 0x01ffffff}};
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/* multipliers */
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const packedelem64 packednineteen = {{19, 19}};
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const packedelem64 packednineteenone = {{19, 1}};
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const packedelem64 packedthirtyeight = {{38, 38}};
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const packedelem64 packed3819 = {{19*2,19}};
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const packedelem64 packed9638 = {{19*4,19*2}};
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/* 121666,121665 */
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const packedelem64 packed121666121665 = {{121666, 121665}};
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/* 2*(2^255 - 19) = 0 mod p */
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const packedelem32 packed2p0 = {{0x7ffffda,0x3fffffe,0x7fffffe,0x3fffffe}};
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const packedelem32 packed2p1 = {{0x7fffffe,0x3fffffe,0x7fffffe,0x3fffffe}};
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const packedelem32 packed2p2 = {{0x7fffffe,0x3fffffe,0x0000000,0x0000000}};
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const packedelem32 packed32zeromodp0 = {{0x7ffffda,0x7ffffda,0x3fffffe,0x3fffffe}};
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const packedelem32 packed32zeromodp1 = {{0x7fffffe,0x7fffffe,0x3fffffe,0x3fffffe}};
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NAMESPACE_END // ArchSSE
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NAMESPACE_END // Donna
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NAMESPACE_END // CryptoPP
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#endif // CRYPTOPP_DOXYGEN_PROCESSING
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#endif // CRYPTOPP_DONNA_SSE_H
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