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mirror of https://github.com/microsoft/DirectXMath synced 2024-11-25 21:40:06 +00:00
DirectXMath/Extensions/DirectXMathBE.h
2018-02-23 23:16:27 -08:00

94 lines
2.4 KiB
C++

//-------------------------------------------------------------------------------------
// DirectXMathBE.h -- Big-endian swap extensions for SIMD C++ Math library
//
// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
//
// http://go.microsoft.com/fwlink/?LinkID=615560
//-------------------------------------------------------------------------------------
#ifdef _MSC_VER
#pragma once
#endif
#pragma warning(push)
#pragma warning(disable : 4987)
#include <intrin.h>
#pragma warning(pop)
#ifndef _M_ARM
#include <tmmintrin.h>
#endif
#include <DirectXMath.h>
namespace DirectX
{
inline XMVECTOR XM_CALLCONV XMVectorEndian
(
FXMVECTOR V
)
{
#if defined(_XM_ARM_NEON_INTRINSICS_) && !defined(_XM_NO_INTRINSICS_)
static const XMVECTORU32 idx = { 0x00010203, 0x04050607, 0x08090A0B, 0x0C0D0E0F };
int8x8x2_t tbl;
tbl.val[0] = vget_low_f32(V);
tbl.val[1] = vget_high_f32(V);
const __n64 rL = vtbl2_u8( tbl, vget_low_f32(idx) );
const __n64 rH = vtbl2_u8( tbl, vget_high_f32(idx) );
return vcombine_f32( rL, rH );
#else
XMVECTORU32 E;
E.v = V;
uint32_t value = E.u[0];
E.u[0] = ( (value << 24) | ((value & 0xFF00) << 8) | ((value & 0xFF0000) >> 8) | (value >> 24) );
value = E.u[1];
E.u[1] = ( (value << 24) | ((value & 0xFF00) << 8) | ((value & 0xFF0000) >> 8) | (value >> 24) );
value = E.u[2];
E.u[2] = ( (value << 24) | ((value & 0xFF00) << 8) | ((value & 0xFF0000) >> 8) | (value >> 24) );
value = E.u[3];
E.u[3] = ( (value << 24) | ((value & 0xFF00) << 8) | ((value & 0xFF0000) >> 8) | (value >> 24) );
return E.v;
#endif
}
#ifndef _M_ARM
namespace SSSE3
{
inline bool XMVerifySSSE3Support()
{
// Should return true on AMD Bulldozer, Intel Core i7/i5/i3, Intel Atom, or later processors
// See http://msdn.microsoft.com/en-us/library/hskdteyh.aspx
int CPUInfo[4] = {-1};
__cpuid( CPUInfo, 0 );
if ( CPUInfo[0] < 1 )
return false;
__cpuid(CPUInfo, 1 );
// Check for SSSE3 instruction set.
return ( (CPUInfo[2] & 0x200) != 0 );
}
inline XMVECTOR XM_CALLCONV XMVectorEndian
(
FXMVECTOR V
)
{
static const XMVECTORU32 idx = { 0x00010203, 0x04050607, 0x08090A0B, 0x0C0D0E0F };
__m128i Result = _mm_shuffle_epi8( _mm_castps_si128(V), idx );
return _mm_castsi128_ps( Result );
}
} // namespace SSSE3
#endif // !_M_ARM
} // namespace DirectX;