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externals/cryptopp/shacal2_simd.cpp

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