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/*
* (C) 2018 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_SIMD_AVX2_H_
#define BOTAN_SIMD_AVX2_H_
#include <botan/types.h>
#include <immintrin.h>
namespace Botan {
class SIMD_8x32 final
{
public:
SIMD_8x32& operator=(const SIMD_8x32& other) = default;
SIMD_8x32(const SIMD_8x32& other) = default;
#if !defined(BOTAN_BUILD_COMPILER_IS_MSVC_2013)
SIMD_8x32& operator=(SIMD_8x32&& other) = default;
SIMD_8x32(SIMD_8x32&& other) = default;
#endif
SIMD_8x32()
{
m_avx2 = _mm256_setzero_si256();
}
explicit SIMD_8x32(const uint32_t B[8])
{
m_avx2 = _mm256_loadu_si256(reinterpret_cast<const __m256i*>(B));
}
static SIMD_8x32 splat(uint32_t B)
{
return SIMD_8x32(_mm256_set1_epi32(B));
}
static SIMD_8x32 load_le(const uint8_t* in)
{
return SIMD_8x32(_mm256_loadu_si256(reinterpret_cast<const __m256i*>(in)));
}
static SIMD_8x32 load_be(const uint8_t* in)
{
return load_le(in).bswap();
}
void store_le(uint8_t out[]) const
{
_mm256_storeu_si256(reinterpret_cast<__m256i*>(out), m_avx2);
}
void store_be(uint8_t out[]) const
{
bswap().store_le(out);
}
template<size_t ROT>
SIMD_8x32 rotl() const
{
static_assert(ROT > 0 && ROT < 32, "Invalid rotation constant");
return SIMD_8x32(_mm256_or_si256(_mm256_slli_epi32(m_avx2, static_cast<int>(ROT)),
_mm256_srli_epi32(m_avx2, static_cast<int>(32-ROT))));
}
template<size_t ROT>
SIMD_8x32 rotr() const
{
return this->rotl<32-ROT>();
}
SIMD_8x32 operator+(const SIMD_8x32& other) const
{
SIMD_8x32 retval(*this);
retval += other;
return retval;
}
SIMD_8x32 operator-(const SIMD_8x32& other) const
{
SIMD_8x32 retval(*this);
retval -= other;
return retval;
}
SIMD_8x32 operator^(const SIMD_8x32& other) const
{
SIMD_8x32 retval(*this);
retval ^= other;
return retval;
}
SIMD_8x32 operator|(const SIMD_8x32& other) const
{
SIMD_8x32 retval(*this);
retval |= other;
return retval;
}
SIMD_8x32 operator&(const SIMD_8x32& other) const
{
SIMD_8x32 retval(*this);
retval &= other;
return retval;
}
void operator+=(const SIMD_8x32& other)
{
m_avx2 = _mm256_add_epi32(m_avx2, other.m_avx2);
}
void operator-=(const SIMD_8x32& other)
{
m_avx2 = _mm256_sub_epi32(m_avx2, other.m_avx2);
}
void operator^=(const SIMD_8x32& other)
{
m_avx2 = _mm256_xor_si256(m_avx2, other.m_avx2);
}
void operator|=(const SIMD_8x32& other)
{
m_avx2 = _mm256_or_si256(m_avx2, other.m_avx2);
}
void operator&=(const SIMD_8x32& other)
{
m_avx2 = _mm256_and_si256(m_avx2, other.m_avx2);
}
template<int SHIFT> SIMD_8x32 shl() const
{
return SIMD_8x32(_mm256_slli_epi32(m_avx2, SHIFT));
}
template<int SHIFT> SIMD_8x32 shr() const
{
return SIMD_8x32(_mm256_srli_epi32(m_avx2, SHIFT));
}
SIMD_8x32 operator~() const
{
return SIMD_8x32(_mm256_xor_si256(m_avx2, _mm256_set1_epi32(0xFFFFFFFF)));
}
// (~reg) & other
SIMD_8x32 andc(const SIMD_8x32& other) const
{
return SIMD_8x32(_mm256_andnot_si256(m_avx2, other.m_avx2));
}
SIMD_8x32 bswap() const
{
const uint8_t BSWAP_MASK[32] = { 3, 2, 1, 0,
7, 6, 5, 4,
11, 10, 9, 8,
15, 14, 13, 12,
19, 18, 17, 16,
23, 22, 21, 20,
27, 26, 25, 24,
31, 30, 29, 28 };
const __m256i bswap = _mm256_loadu_si256(reinterpret_cast<const __m256i*>(BSWAP_MASK));
const __m256i output = _mm256_shuffle_epi8(m_avx2, bswap);
return SIMD_8x32(output);
}
static void transpose(SIMD_8x32& B0, SIMD_8x32& B1,
SIMD_8x32& B2, SIMD_8x32& B3)
{
const __m256i T0 = _mm256_unpacklo_epi32(B0.m_avx2, B1.m_avx2);
const __m256i T1 = _mm256_unpacklo_epi32(B2.m_avx2, B3.m_avx2);
const __m256i T2 = _mm256_unpackhi_epi32(B0.m_avx2, B1.m_avx2);
const __m256i T3 = _mm256_unpackhi_epi32(B2.m_avx2, B3.m_avx2);
B0.m_avx2 = _mm256_unpacklo_epi64(T0, T1);
B1.m_avx2 = _mm256_unpackhi_epi64(T0, T1);
B2.m_avx2 = _mm256_unpacklo_epi64(T2, T3);
B3.m_avx2 = _mm256_unpackhi_epi64(T2, T3);
}
private:
SIMD_8x32(__m256i x) : m_avx2(x) {}
__m256i m_avx2;
};
}
#endif
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