95 lines
3.2 KiB
C++
95 lines
3.2 KiB
C++
// shacla2_simd.cpp - written and placed in the public domain by
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// Jeffrey Walton and Jack Lloyd
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//
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// Jack Lloyd and the Botan team allowed Crypto++ to use parts of
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// Botan's implementation under the same license as Crypto++
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// is released. The code for SHACAL2_Enc_ProcessAndXorBlock_SHANI
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// below is Botan's x86_encrypt_blocks with minor tweaks. Many thanks
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// to the Botan team. Also see http://github.com/randombit/botan/.
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//
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// This source file uses intrinsics to gain access to SHA-NI and
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// ARMv8a SHA instructions. A separate source file is needed because
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// additional CXXFLAGS are required to enable the appropriate instruction
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// sets in some build configurations.
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#include "pch.h"
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#include "config.h"
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#include "sha.h"
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#include "misc.h"
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#if (CRYPTOPP_SHANI_AVAILABLE)
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# include <nmmintrin.h>
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# include <immintrin.h>
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#endif
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// Squash MS LNK4221 and libtool warnings
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extern const char SHACAL2_SIMD_FNAME[] = __FILE__;
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NAMESPACE_BEGIN(CryptoPP)
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#if CRYPTOPP_SHANI_AVAILABLE
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void SHACAL2_Enc_ProcessAndXorBlock_SHANI(const word32* subKeys, const byte *inBlock, const byte *xorBlock, byte *outBlock)
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{
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CRYPTOPP_ASSERT(subKeys);
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CRYPTOPP_ASSERT(inBlock);
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CRYPTOPP_ASSERT(outBlock);
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const __m128i MASK1 = _mm_set_epi8(8,9,10,11, 12,13,14,15, 0,1,2,3, 4,5,6,7);
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const __m128i MASK2 = _mm_set_epi8(0,1,2,3, 4,5,6,7, 8,9,10,11, 12,13,14,15);
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__m128i B0 = _mm_shuffle_epi8(_mm_loadu_si128(CONST_M128_CAST(inBlock + 0)), MASK1);
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__m128i B1 = _mm_shuffle_epi8(_mm_loadu_si128(CONST_M128_CAST(inBlock + 16)), MASK2);
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__m128i TMP = _mm_alignr_epi8(B0, B1, 8);
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B1 = _mm_blend_epi16(B1, B0, 0xF0);
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B0 = TMP;
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#if 0
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// SSE2 + SSSE3, but 0.2 cpb slower on a Celeraon J3455
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const __m128i MASK1 = _mm_set_epi8(8,9,10,11, 12,13,14,15, 0,1,2,3, 4,5,6,7);
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const __m128i MASK2 = _mm_set_epi8(0,1,2,3, 4,5,6,7, 8,9,10,11, 12,13,14,15);
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__m128i B0 = _mm_loadu_si128(CONST_M128_CAST(inBlock + 0));
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__m128i B1 = _mm_loadu_si128(CONST_M128_CAST(inBlock + 16));
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__m128i TMP = _mm_shuffle_epi8(_mm_unpacklo_epi64(B0, B1), MASK2);
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B1 = _mm_shuffle_epi8(_mm_unpackhi_epi64(B0, B1), MASK2);
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B0 = TMP;
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#endif
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const byte* keys = reinterpret_cast<const byte*>(subKeys);
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for (size_t i = 0; i != 8; ++i)
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{
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const __m128i RK0 = _mm_load_si128(CONST_M128_CAST(keys + 32*i));
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const __m128i RK2 = _mm_load_si128(CONST_M128_CAST(keys + 32*i+16));
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const __m128i RK1 = _mm_srli_si128(RK0, 8);
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const __m128i RK3 = _mm_srli_si128(RK2, 8);
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B1 = _mm_sha256rnds2_epu32(B1, B0, RK0);
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B0 = _mm_sha256rnds2_epu32(B0, B1, RK1);
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B1 = _mm_sha256rnds2_epu32(B1, B0, RK2);
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B0 = _mm_sha256rnds2_epu32(B0, B1, RK3);
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}
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TMP = _mm_shuffle_epi8(_mm_unpackhi_epi64(B0, B1), MASK1);
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B1 = _mm_shuffle_epi8(_mm_unpacklo_epi64(B0, B1), MASK1);
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B0 = TMP;
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if (xorBlock)
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{
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_mm_storeu_si128(M128_CAST(outBlock + 0),
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_mm_xor_si128(B0, _mm_loadu_si128(CONST_M128_CAST(xorBlock + 0))));
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_mm_storeu_si128(M128_CAST(outBlock + 16),
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_mm_xor_si128(B1, _mm_loadu_si128(CONST_M128_CAST(xorBlock + 16))));
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}
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else
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{
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_mm_storeu_si128(M128_CAST(outBlock + 0), B0);
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_mm_storeu_si128(M128_CAST(outBlock + 16), B1);
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}
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}
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#endif
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NAMESPACE_END
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