413 lines
14 KiB
C++
413 lines
14 KiB
C++
// ppc-crypto.h - written and placed in public domain by Jeffrey Walton
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//! \file ppc-crypto.h
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//! \brief Support functions for PowerPC and Power8 vector operations
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//! \details This header provides an agnostic interface into GCC and
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//! IBM XL C/C++ compilers modulo their different built-in functions
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//! for accessing vector intructions.
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//! \since Crypto++ 6.0
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#ifndef CRYPTOPP_PPC_CRYPTO_H
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#define CRYPTOPP_PPC_CRYPTO_H
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#include "config.h"
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#if defined(CRYPTOPP_ALTIVEC_AVAILABLE) || defined(CRYPTOPP_DOXYGEN_PROCESSING)
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# include <altivec.h>
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# undef vector
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# undef pixel
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# undef bool
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#endif
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NAMESPACE_BEGIN(CryptoPP)
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#if defined(CRYPTOPP_ALTIVEC_AVAILABLE) || defined(CRYPTOPP_DOXYGEN_PROCESSING)
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typedef __vector unsigned char uint8x16_p8;
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typedef __vector unsigned int uint32x4_p8;
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typedef __vector unsigned long long uint64x2_p8;
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// Use 8x16 for documentation because it is used frequently
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#if defined(CRYPTOPP_XLC_VERSION) || defined(CRYPTOPP_DOXYGEN_PROCESSING)
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typedef uint8x16_p8 VectorType;
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#elif defined(CRYPTOPP_GCC_VERSION)
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typedef uint64x2_p8 VectorType;
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#endif
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//! \brief Reverse a 16-byte array
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//! \param src the byte array
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//! \details ReverseByteArrayLE reverses a 16-byte array on a little endian
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//! system. It does nothing on a big endian system.
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//! \since Crypto++ 6.0
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inline void ReverseByteArrayLE(byte src[16])
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{
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#if defined(CRYPTOPP_XLC_VERSION) && defined(IS_LITTLE_ENDIAN)
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vec_st(vec_reve(vec_ld(0, src)), 0, src);
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#elif defined(IS_LITTLE_ENDIAN)
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const uint8x16_p8 mask = {15,14,13,12, 11,10,9,8, 7,6,5,4, 3,2,1,0};
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const uint8x16_p8 zero = {0};
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vec_vsx_st(vec_perm(vec_vsx_ld(0, src), zero, mask), 0, src);
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#endif
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}
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//! \brief Reverse a vector
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//! \tparam T a vector type
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//! \param src the vector
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//! \details Reverse() endian swaps the bytes in a vector
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//! \sa Reverse(), VectorLoadBE(), VectorLoad(), VectorLoadKey()
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//! \since Crypto++ 6.0
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template <class T>
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inline T Reverse(const T& src)
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{
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const uint8x16_p8 mask = {15,14,13,12, 11,10,9,8, 7,6,5,4, 3,2,1,0};
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const uint8x16_p8 zero = {0};
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return vec_perm(src, zero, mask);
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}
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//! \brief Loads a vector from a byte array
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//! \param src the byte array
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//! \details Loads a vector in big endian format from a byte array.
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//! VectorLoadBE will swap endianess on little endian systems.
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//! \note VectorLoadBE() does not require an aligned array.
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//! \sa Reverse(), VectorLoadBE(), VectorLoad(), VectorLoadKey()
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//! \since Crypto++ 6.0
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inline VectorType VectorLoadBE(const uint8_t src[16])
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{
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#if defined(CRYPTOPP_XLC_VERSION)
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return (VectorType)vec_xl_be(0, (uint8_t*)src);
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#else
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# if defined(IS_LITTLE_ENDIAN)
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return (VectorType)Reverse(vec_vsx_ld(0, (uint8_t*)src));
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# else
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return (VectorType)vec_vsx_ld(0, (uint8_t*)src);
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# endif
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#endif
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}
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//! \brief Loads a vector from a byte array
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//! \param src the byte array
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//! \param off offset into the byte array
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//! \details Loads a vector in big endian format from a byte array.
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//! VectorLoadBE will swap endianess on little endian systems.
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//! \note VectorLoadBE does not require an aligned array.
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//! \sa Reverse(), VectorLoadBE(), VectorLoad(), VectorLoadKey()
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//! \since Crypto++ 6.0
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inline VectorType VectorLoadBE(int off, const uint8_t src[16])
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{
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#if defined(CRYPTOPP_XLC_VERSION)
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return (VectorType)vec_xl_be(off, (uint8_t*)src);
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#else
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# if defined(IS_LITTLE_ENDIAN)
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return (VectorType)Reverse(vec_vsx_ld(off, (uint8_t*)src));
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# else
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return (VectorType)vec_vsx_ld(off, (uint8_t*)src);
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# endif
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#endif
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}
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//! \brief Stores a vector to a byte array
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//! \tparam T a vector type
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//! \param src the vector
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//! \param dest the byte array
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//! \details Stores a vector in big endian format to a byte array.
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//! VectorStoreBE will swap endianess on little endian systems.
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//! \note VectorStoreBE does not require an aligned array.
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//! \sa Reverse(), VectorLoadBE(), VectorLoad(), VectorLoadKey()
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//! \since Crypto++ 6.0
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template <class T>
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inline void VectorStoreBE(const T& src, uint8_t dest[16])
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{
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#if defined(CRYPTOPP_XLC_VERSION)
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vec_xst_be((uint8x16_p8)src, 0, (uint8_t*)dest);
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#else
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# if defined(IS_LITTLE_ENDIAN)
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vec_vsx_st(Reverse((uint8x16_p8)src), 0, (uint8_t*)dest);
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# else
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vec_vsx_st((uint8x16_p8)src, 0, (uint8_t*)dest);
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# endif
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#endif
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}
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//////////////////////////////////////////////////////////////////
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//! \brief Loads a vector from a byte array
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//! \param src the byte array
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//! \details Loads a vector in big endian format from a byte array.
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//! VectorLoad will swap endianess on little endian systems.
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//! \note VectorLoad does not require an aligned array.
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//! \sa Reverse(), VectorLoadBE(), VectorLoad(), VectorLoadKey()
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//! \since Crypto++ 6.0
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inline VectorType VectorLoad(const byte src[16])
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{
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return (VectorType)VectorLoadBE((uint8_t*)src);
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}
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//! \brief Loads a vector from a byte array
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//! \param src the byte array
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//! \param off offset into the byte array
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//! \details Loads a vector in big endian format from a byte array.
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//! VectorLoad will swap endianess on little endian systems.
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//! \note VectorLoad does not require an aligned array.
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//! \sa Reverse(), VectorLoadBE(), VectorLoad(), VectorLoadKey()
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//! \since Crypto++ 6.0
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inline VectorType VectorLoad(int off, const byte src[16])
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{
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return (VectorType)VectorLoadBE(off, (uint8_t*)src);
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}
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//! \brief Loads a vector from a byte array
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//! \param src the byte array
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//! \details Loads a vector from a byte array.
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//! VectorLoadKey does not swap endianess on little endian systems.
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//! \note VectorLoadKey does not require an aligned array.
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//! \sa Reverse(), VectorLoadBE(), VectorLoad(), VectorLoadKey()
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//! \since Crypto++ 6.0
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inline VectorType VectorLoadKey(const byte src[16])
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{
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#if defined(CRYPTOPP_XLC_VERSION)
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return (VectorType)vec_xl(0, (uint8_t*)src);
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#else
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return (VectorType)vec_vsx_ld(0, (uint8_t*)src);
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#endif
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}
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//! \brief Loads a vector from a 32-bit word array
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//! \param src the 32-bit word array
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//! \details Loads a vector from a 32-bit word array.
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//! VectorLoadKey does not swap endianess on little endian systems.
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//! \note VectorLoadKey does not require an aligned array.
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//! \sa Reverse(), VectorLoadBE(), VectorLoad(), VectorLoadKey()
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//! \since Crypto++ 6.0
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inline VectorType VectorLoadKey(const word32 src[4])
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{
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#if defined(CRYPTOPP_XLC_VERSION)
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return (VectorType)vec_xl(0, (uint8_t*)src);
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#else
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return (VectorType)vec_vsx_ld(0, (uint8_t*)src);
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#endif
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}
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//! \brief Loads a vector from a byte array
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//! \param src the byte array
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//! \param off offset into the byte array
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//! \details Loads a vector from a byte array.
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//! VectorLoadKey does not swap endianess on little endian systems.
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//! \note VectorLoadKey does not require an aligned array.
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//! \sa Reverse(), VectorLoadBE(), VectorLoad(), VectorLoadKey()
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//! \since Crypto++ 6.0
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inline VectorType VectorLoadKey(int off, const byte src[16])
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{
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#if defined(CRYPTOPP_XLC_VERSION)
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return (VectorType)vec_xl(off, (uint8_t*)src);
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#else
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return (VectorType)vec_vsx_ld(off, (uint8_t*)src);
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#endif
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}
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//! \brief Stores a vector to a byte array
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//! \tparam T a vector type
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//! \param src the vector
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//! \param dest the byte array
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//! \details Stores a vector in big endian format to a byte array.
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//! VectorStore will swap endianess on little endian systems.
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//! \note VectorStoreBE does not require an aligned array.
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//! \since Crypto++ 6.0
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template<class T>
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inline void VectorStore(const T& src, byte dest[16])
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{
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return VectorStoreBE(src, (uint8_t*)dest);
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}
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//! \brief Permutes two vectors
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//! \tparam T1 a vector type
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//! \tparam T2 a vector type
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//! \param vec1 the first vector
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//! \param vec2 the second vector
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//! \param mask vector mask
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//! \details VectorPermute returns a new vector from vec1 and vec2
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//! based on mask. mask is an uint8x16_p8 type vector. The return
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//! vector is the same type as vec1.
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//! \since Crypto++ 6.0
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template <class T1, class T2>
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inline T1 VectorPermute(const T1& vec1, const T1& vec2, const T2& mask)
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{
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return (T1)vec_perm(vec1, vec2, (uint8x16_p8)mask);
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}
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//! \brief XOR two vectors
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//! \tparam T1 a vector type
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//! \tparam T2 a vector type
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//! \param vec1 the first vector
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//! \param vec2 the second vector
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//! \details VectorXor returns a new vector from vec1 and vec2. The return
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//! vector is the same type as vec1.
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//! \since Crypto++ 6.0
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template <class T1, class T2>
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inline T1 VectorXor(const T1& vec1, const T2& vec2)
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{
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return (T1)vec_xor(vec1, (T1)vec2);
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}
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//! \brief Add two vector
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//! \tparam T1 a vector type
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//! \tparam T2 a vector type
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//! \param vec1 the first vector
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//! \param vec2 the second vector
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//! \details VectorAdd returns a new vector from vec1 and vec2.
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//! vec2 is cast to the same type as vec1. The return vector
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//! is the same type as vec1.
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//! \since Crypto++ 6.0
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template <class T1, class T2>
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inline T1 VectorAdd(const T1& vec1, const T2& vec2)
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{
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return (T1)vec_add(vec1, (T1)vec2);
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}
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//! \brief Shift two vectors left
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//! \tparam T1 a vector type
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//! \tparam T2 a vector type
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//! \param vec1 the first vector
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//! \param vec2 the second vector
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//! \details VectorShiftLeft returns a new vector from vec1 and vec2.
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//! Both vec1 and vec2 are cast to uint8x16_p8. The return vector
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//! is the same type as vec1.
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//! \note VectorShiftLeft handles the difference between big endian
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//! and little endian internally. Call the function as if on a big
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//! endian machine.
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//! \since Crypto++ 6.0
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template <int C, class T1, class T2>
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inline T1 VectorShiftLeft(const T1& vec1, const T2& vec2)
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{
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#if defined(IS_LITTLE_ENDIAN)
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return (T1)vec_sld((uint8x16_p8)vec2, (uint8x16_p8)vec1, 16-C);
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#else
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return (T1)vec_sld((uint8x16_p8)vec1, (uint8x16_p8)vec2, C);
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#endif
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}
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//! \brief One round of AES encryption
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//! \tparam T1 a vector type
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//! \tparam T2 a vector type
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//! \param state the state vector
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//! \param key the subkey vector
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//! \details VectorEncrypt performs one round of AES encryption of state
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//! using subkey key. The return vector is the same type as vec1.
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//! \since Crypto++ 6.0
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template <class T1, class T2>
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inline T1 VectorEncrypt(const T1& state, const T2& key)
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{
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#if defined(CRYPTOPP_XLC_VERSION)
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return (T1)__vcipher((VectorType)state, (VectorType)key);
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#elif defined(CRYPTOPP_GCC_VERSION)
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return (T1)__builtin_crypto_vcipher((VectorType)state, (VectorType)key);
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#else
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CRYPTOPP_ASSERT(0);
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#endif
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}
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//! \brief Final round of AES encryption
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//! \tparam T1 a vector type
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//! \tparam T2 a vector type
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//! \param state the state vector
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//! \param key the subkey vector
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//! \details VectorEncryptLast performs the final round of AES encryption
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//! of state using subkey key. The return vector is the same type as vec1.
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//! \since Crypto++ 6.0
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template <class T1, class T2>
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inline T1 VectorEncryptLast(const T1& state, const T2& key)
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{
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#if defined(CRYPTOPP_XLC_VERSION)
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return (T1)__vcipherlast((VectorType)state, (VectorType)key);
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#elif defined(CRYPTOPP_GCC_VERSION)
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return (T1)__builtin_crypto_vcipherlast((VectorType)state, (VectorType)key);
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#else
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CRYPTOPP_ASSERT(0);
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#endif
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}
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//! \brief One round of AES decryption
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//! \tparam T1 a vector type
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//! \tparam T2 a vector type
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//! \param state the state vector
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//! \param key the subkey vector
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//! \details VectorDecrypt performs one round of AES decryption of state
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//! using subkey key. The return vector is the same type as vec1.
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//! \since Crypto++ 6.0
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template <class T1, class T2>
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inline T1 VectorDecrypt(const T1& state, const T2& key)
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{
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#if defined(CRYPTOPP_XLC_VERSION)
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return (T1)__vncipher((VectorType)state, (VectorType)key);
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#elif defined(CRYPTOPP_GCC_VERSION)
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return (T1)__builtin_crypto_vncipher((VectorType)state, (VectorType)key);
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#else
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CRYPTOPP_ASSERT(0);
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#endif
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}
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//! \brief Final round of AES decryption
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//! \tparam T1 a vector type
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//! \tparam T2 a vector type
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//! \param state the state vector
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//! \param key the subkey vector
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//! \details VectorDecryptLast performs the final round of AES decryption
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//! of state using subkey key. The return vector is the same type as vec1.
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//! \since Crypto++ 6.0
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template <class T1, class T2>
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inline T1 VectorDecryptLast(const T1& state, const T2& key)
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{
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#if defined(CRYPTOPP_XLC_VERSION)
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return (T1)__vncipherlast((VectorType)state, (VectorType)key);
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#elif defined(CRYPTOPP_GCC_VERSION)
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return (T1)__builtin_crypto_vncipherlast((VectorType)state, (VectorType)key);
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#else
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CRYPTOPP_ASSERT(0);
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#endif
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}
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//! \brief SHA512 Sigma functions
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//! \tparam func the function
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//! \tparam subfunc the sub-function
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//! \tparam T a vector type
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//! \param vec the block to transform
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//! \details VectorSHA512 selects sigma0, sigma1, Sigma0, Sigma1 based on
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//! func and subfunc. The return vector is the same type as vec.
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//! \since Crypto++ 6.0
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template <int func, int subfunc, class T>
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inline T VectorSHA512(const T& vec)
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{
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#if defined(CRYPTOPP_XLC_VERSION)
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return (T)__vshasigmad((uint64x2_p8)vec, func, subfunc);
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#elif defined(CRYPTOPP_GCC_VERSION)
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return (T)__builtin_crypto_vshasigmad((uint64x2_p8)vec, func, subfunc);
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#else
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CRYPTOPP_ASSERT(0);
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#endif
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}
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//! \brief SHA256 Sigma functions
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//! \tparam func the function
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//! \tparam subfunc the sub-function
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//! \tparam T a vector type
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//! \param vec the block to transform
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//! \details VectorSHA256 selects sigma0, sigma1, Sigma0, Sigma1 based on
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//! func and subfunc. The return vector is the same type as vec.
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//! \since Crypto++ 6.0
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template <int func, int subfunc, class T>
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inline T VectorSHA256(const T& vec)
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{
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#if defined(CRYPTOPP_XLC_VERSION)
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return (T)__vshasigmaw((uint32x4_p8)vec, func, subfunc);
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#elif defined(CRYPTOPP_GCC_VERSION)
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return (T)__builtin_crypto_vshasigmaw((uint32x4_p8)vec, func, subfunc);
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#else
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CRYPTOPP_ASSERT(0);
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#endif
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}
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#endif // CRYPTOPP_ALTIVEC_AVAILABLE
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NAMESPACE_END
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#endif // CRYPTOPP_PPC_CRYPTO_H
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