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/*
* Lightweight wrappers for SSE2 intrinsics for 32-bit operations
* (C) 2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_SIMD_SSE_H__
#define BOTAN_SIMD_SSE_H__
#if defined(BOTAN_TARGET_CPU_HAS_SSE2)
#include <botan/cpuid.h>
#include <emmintrin.h>
namespace Botan {
class SIMD_SSE2
{
public:
static bool enabled() { return CPUID::has_sse2(); }
SIMD_SSE2(const u32bit B[4])
{
reg = _mm_loadu_si128(reinterpret_cast<const __m128i*>(B));
}
SIMD_SSE2(u32bit B0, u32bit B1, u32bit B2, u32bit B3)
{
reg = _mm_set_epi32(B0, B1, B2, B3);
}
SIMD_SSE2(u32bit B)
{
reg = _mm_set1_epi32(B);
}
static SIMD_SSE2 load_le(const void* in)
{
return _mm_loadu_si128(reinterpret_cast<const __m128i*>(in));
}
static SIMD_SSE2 load_be(const void* in)
{
return load_le(in).bswap();
}
void store_le(byte out[]) const
{
_mm_storeu_si128(reinterpret_cast<__m128i*>(out), reg);
}
void store_be(byte out[]) const
{
bswap().store_le(out);
}
void rotate_left(size_t rot)
{
reg = _mm_or_si128(_mm_slli_epi32(reg, static_cast<int>(rot)),
_mm_srli_epi32(reg, static_cast<int>(32-rot)));
}
void rotate_right(size_t rot)
{
rotate_left(32 - rot);
}
void operator+=(const SIMD_SSE2& other)
{
reg = _mm_add_epi32(reg, other.reg);
}
SIMD_SSE2 operator+(const SIMD_SSE2& other) const
{
return _mm_add_epi32(reg, other.reg);
}
void operator-=(const SIMD_SSE2& other)
{
reg = _mm_sub_epi32(reg, other.reg);
}
SIMD_SSE2 operator-(const SIMD_SSE2& other) const
{
return _mm_sub_epi32(reg, other.reg);
}
void operator^=(const SIMD_SSE2& other)
{
reg = _mm_xor_si128(reg, other.reg);
}
SIMD_SSE2 operator^(const SIMD_SSE2& other) const
{
return _mm_xor_si128(reg, other.reg);
}
void operator|=(const SIMD_SSE2& other)
{
reg = _mm_or_si128(reg, other.reg);
}
SIMD_SSE2 operator&(const SIMD_SSE2& other)
{
return _mm_and_si128(reg, other.reg);
}
void operator&=(const SIMD_SSE2& other)
{
reg = _mm_and_si128(reg, other.reg);
}
SIMD_SSE2 operator<<(size_t shift) const
{
return _mm_slli_epi32(reg, static_cast<int>(shift));
}
SIMD_SSE2 operator>>(size_t shift) const
{
return _mm_srli_epi32(reg, static_cast<int>(shift));
}
SIMD_SSE2 operator~() const
{
return _mm_xor_si128(reg, _mm_set1_epi32(0xFFFFFFFF));
}
// (~reg) & other
SIMD_SSE2 andc(const SIMD_SSE2& other)
{
return _mm_andnot_si128(reg, other.reg);
}
SIMD_SSE2 bswap() const
{
__m128i T = reg;
T = _mm_shufflehi_epi16(T, _MM_SHUFFLE(2, 3, 0, 1));
T = _mm_shufflelo_epi16(T, _MM_SHUFFLE(2, 3, 0, 1));
return _mm_or_si128(_mm_srli_epi16(T, 8),
_mm_slli_epi16(T, 8));
}
static void transpose(SIMD_SSE2& B0, SIMD_SSE2& B1,
SIMD_SSE2& B2, SIMD_SSE2& B3)
{
__m128i T0 = _mm_unpacklo_epi32(B0.reg, B1.reg);
__m128i T1 = _mm_unpacklo_epi32(B2.reg, B3.reg);
__m128i T2 = _mm_unpackhi_epi32(B0.reg, B1.reg);
__m128i T3 = _mm_unpackhi_epi32(B2.reg, B3.reg);
B0.reg = _mm_unpacklo_epi64(T0, T1);
B1.reg = _mm_unpackhi_epi64(T0, T1);
B2.reg = _mm_unpacklo_epi64(T2, T3);
B3.reg = _mm_unpackhi_epi64(T2, T3);
}
private:
SIMD_SSE2(__m128i in) { reg = in; }
__m128i reg;
};
}
#endif
#endif
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