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// Copyright (c) 2015 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "AES tools" project.
// For details, see https://github.com/egor-tensin/aes-tools.
// Distributed under the MIT License.
#pragma once
#include <emmintrin.h>
#include <tmmintrin.h>
#ifdef __cplusplus
extern "C"
{
#endif
/**
* \brief Represents a 128-bit block.
*/
typedef __m128i AES_Block128;
/**
* \brief Loads a 128-bit block from a memory location.
*
* \param[in] src The pointer to a memory location. Must not be `NULL`.
*
* \return The loaded 128-bit block.
*/
static __inline AES_Block128 aes_load_block128(const void* src)
{
return _mm_loadu_si128((AES_Block128*) src);
}
/**
* \brief Loads a 128-bit block from a 16-byte aligned memory location.
*
* \param[in] src The pointer to a 16-byte aligned memory location. Must not be `NULL`.
*
* \return The loaded 128-bit block.
*/
static __inline AES_Block128 aes_load_block128_aligned(const void* src)
{
return _mm_load_si128((AES_Block128*) src);
}
/**
* \brief Stores a 128-bit block in a memory location.
*
* \param[out] dest The pointer to a memory location. Must not be `NULL`.
*
* \param[in] block The block to be stored.
*/
static __inline void __fastcall aes_store_block128(
void* dest,
AES_Block128 block)
{
_mm_storeu_si128((AES_Block128*) dest, block);
}
/**
* \brief Stores a 128-bit block in a 16-byte aligned memory location.
*
* \param[out] dest The pointer to a 16-byte aligned memory location. Must not be `NULL`.
*
* \param[in] block The block to be stored.
*/
static __inline void __fastcall aes_store_block128_aligned(
void* dest,
AES_Block128 block)
{
_mm_store_si128((AES_Block128*) dest, block);
}
/**
* \brief XORs two 128-bit blocks.
*
* \param[in] a The first XOR operand.
* \param[in] b The second XOR operand.
*
* \return `a^b`.
*/
static __inline AES_Block128 __fastcall aes_xor_block128(
AES_Block128 a,
AES_Block128 b)
{
return _mm_xor_si128(a, b);
}
/**
* \brief Builds a 128-bit block from four 4-byte values.
*
* Builds a 128-bit block like this:
*
* * dest[127:96] = hi3
* * dest[95:64] = hi2
* * dest[63:32] = lo1
* * dest[31:0] = lo0
*
* \param[in] hi3 The most significant 4-byte value.
* \param[in] hi2 The more significant 4-byte value.
* \param[in] lo1 The less significant 4-byte value.
* \param[in] lo0 The least significant 4-byte value.
*
* \return The built 128-bit block.
*/
static __inline AES_Block128 __fastcall aes_make_block128(int hi3, int hi2, int lo1, int lo0)
{
return _mm_set_epi32(hi3, hi2, lo1, lo0);
}
static __inline AES_Block128 __fastcall aes_reverse_byte_order_block128(AES_Block128 block)
{
return _mm_shuffle_epi8(block, aes_make_block128(0x00010203, 0x04050607, 0x08090a0b, 0x0c0d0e0f));
}
static __inline AES_Block128 __fastcall aes_inc_block128(AES_Block128 x)
{
return _mm_add_epi32(x, aes_make_block128(0, 0, 0, 1));
}
#ifdef __cplusplus
}
#endif
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