mirror of
https://github.com/ncblakely/GiantsTools
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276 lines
12 KiB
C++
276 lines
12 KiB
C++
//-------------------------------------------------------------------------------------
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// DirectXMathAVX.h -- AVX (version 1) extensions for SIMD C++ Math library
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// Licensed under the MIT License.
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//
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// http://go.microsoft.com/fwlink/?LinkID=615560
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//-------------------------------------------------------------------------------------
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#pragma once
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#if defined(_M_ARM) || defined(_M_ARM64) || defined(_M_HYBRID_X86_ARM64) || __arm__ || __aarch64__
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#error AVX not supported on ARM platform
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#endif
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#include <DirectXMath.h>
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namespace DirectX
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{
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namespace AVX
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{
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inline bool XMVerifyAVXSupport()
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{
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// Should return true for AMD Bulldozer, Intel "Sandy Bridge", and Intel "Ivy Bridge" or later processors
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// with OS support for AVX (Windows 7 Service Pack 1, Windows Server 2008 R2 Service Pack 1, Windows 8, Windows Server 2012)
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// See http://msdn.microsoft.com/en-us/library/hskdteyh.aspx
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int CPUInfo[4] = {-1};
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#if defined(__clang__) || defined(__GNUC__)
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__cpuid(0, CPUInfo[0], CPUInfo[1], CPUInfo[2], CPUInfo[3]);
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#else
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__cpuid( CPUInfo, 0 );
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#endif
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if ( CPUInfo[0] < 1 )
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return false;
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#if defined(__clang__) || defined(__GNUC__)
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__cpuid(1, CPUInfo[0], CPUInfo[1], CPUInfo[2], CPUInfo[3]);
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#else
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__cpuid(CPUInfo, 1 );
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#endif
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// We check for AVX, OSXSAVE, SSSE4.1, and SSE3
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return ( (CPUInfo[2] & 0x18080001) == 0x18080001 );
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}
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//-------------------------------------------------------------------------------------
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// Vector
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//-------------------------------------------------------------------------------------
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inline XMVECTOR XM_CALLCONV XMVectorReplicatePtr( _In_ const float *pValue )
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{
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return _mm_broadcast_ss( pValue );
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}
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inline XMVECTOR XM_CALLCONV XMVectorSplatX( FXMVECTOR V )
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{
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return _mm_permute_ps( V, _MM_SHUFFLE(0, 0, 0, 0) );
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}
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inline XMVECTOR XM_CALLCONV XMVectorSplatY( FXMVECTOR V )
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{
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return _mm_permute_ps( V, _MM_SHUFFLE(1, 1, 1, 1) );
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}
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inline XMVECTOR XM_CALLCONV XMVectorSplatZ( FXMVECTOR V )
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{
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return _mm_permute_ps( V, _MM_SHUFFLE(2, 2, 2, 2) );
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}
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inline XMVECTOR XM_CALLCONV XMVectorSplatW( FXMVECTOR V )
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{
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return _mm_permute_ps( V, _MM_SHUFFLE(3, 3, 3, 3) );
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}
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inline XMVECTOR XM_CALLCONV XMVectorSwizzle( FXMVECTOR V, uint32_t E0, uint32_t E1, uint32_t E2, uint32_t E3 )
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{
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assert( (E0 < 4) && (E1 < 4) && (E2 < 4) && (E3 < 4) );
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_Analysis_assume_( (E0 < 4) && (E1 < 4) && (E2 < 4) && (E3 < 4) );
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unsigned int elem[4] = { E0, E1, E2, E3 };
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__m128i vControl = _mm_loadu_si128( reinterpret_cast<const __m128i *>(&elem[0]) );
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return _mm_permutevar_ps( V, vControl );
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}
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inline XMVECTOR XM_CALLCONV XMVectorPermute( FXMVECTOR V1, FXMVECTOR V2, uint32_t PermuteX, uint32_t PermuteY, uint32_t PermuteZ, uint32_t PermuteW )
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{
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assert( PermuteX <= 7 && PermuteY <= 7 && PermuteZ <= 7 && PermuteW <= 7 );
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_Analysis_assume_( PermuteX <= 7 && PermuteY <= 7 && PermuteZ <= 7 && PermuteW <= 7 );
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static const XMVECTORU32 three = { { { 3, 3, 3, 3 } } };
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XM_ALIGNED_DATA(16) unsigned int elem[4] = { PermuteX, PermuteY, PermuteZ, PermuteW };
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__m128i vControl = _mm_load_si128( reinterpret_cast<const __m128i *>(&elem[0]) );
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__m128i vSelect = _mm_cmpgt_epi32( vControl, three );
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vControl = _mm_castps_si128( _mm_and_ps( _mm_castsi128_ps( vControl ), three ) );
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__m128 shuffled1 = _mm_permutevar_ps( V1, vControl );
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__m128 shuffled2 = _mm_permutevar_ps( V2, vControl );
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__m128 masked1 = _mm_andnot_ps( _mm_castsi128_ps( vSelect ), shuffled1 );
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__m128 masked2 = _mm_and_ps( _mm_castsi128_ps( vSelect ), shuffled2 );
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return _mm_or_ps( masked1, masked2 );
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}
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inline XMVECTOR XM_CALLCONV XMVectorShiftLeft(FXMVECTOR V1, FXMVECTOR V2, uint32_t Elements)
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{
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assert( Elements < 4 );
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_Analysis_assume_( Elements < 4 );
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return AVX::XMVectorPermute(V1, V2, Elements, ((Elements) + 1), ((Elements) + 2), ((Elements) + 3));
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}
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inline XMVECTOR XM_CALLCONV XMVectorRotateLeft(FXMVECTOR V, uint32_t Elements)
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{
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assert( Elements < 4 );
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_Analysis_assume_( Elements < 4 );
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return AVX::XMVectorSwizzle( V, Elements & 3, (Elements + 1) & 3, (Elements + 2) & 3, (Elements + 3) & 3 );
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}
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inline XMVECTOR XM_CALLCONV XMVectorRotateRight(FXMVECTOR V, uint32_t Elements)
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{
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assert( Elements < 4 );
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_Analysis_assume_( Elements < 4 );
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return AVX::XMVectorSwizzle( V, (4 - (Elements)) & 3, (5 - (Elements)) & 3, (6 - (Elements)) & 3, (7 - (Elements)) & 3 );
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}
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//-------------------------------------------------------------------------------------
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// Permute Templates
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//-------------------------------------------------------------------------------------
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namespace Internal
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{
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// Slow path fallback for permutes that do not map to a single SSE opcode.
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template<uint32_t Shuffle, bool WhichX, bool WhichY, bool WhichZ, bool WhichW> struct PermuteHelper
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{
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static XMVECTOR XM_CALLCONV Permute(FXMVECTOR v1, FXMVECTOR v2)
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{
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static const XMVECTORU32 selectMask =
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{
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WhichX ? 0xFFFFFFFF : 0,
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WhichY ? 0xFFFFFFFF : 0,
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WhichZ ? 0xFFFFFFFF : 0,
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WhichW ? 0xFFFFFFFF : 0,
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};
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XMVECTOR shuffled1 = _mm_permute_ps(v1, Shuffle);
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XMVECTOR shuffled2 = _mm_permute_ps(v2, Shuffle);
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XMVECTOR masked1 = _mm_andnot_ps(selectMask, shuffled1);
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XMVECTOR masked2 = _mm_and_ps(selectMask, shuffled2);
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return _mm_or_ps(masked1, masked2);
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}
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};
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// Fast path for permutes that only read from the first vector.
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template<uint32_t Shuffle> struct PermuteHelper<Shuffle, false, false, false, false>
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{
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static XMVECTOR XM_CALLCONV Permute(FXMVECTOR v1, FXMVECTOR v2) { (v2); return _mm_permute_ps(v1, Shuffle); }
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};
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// Fast path for permutes that only read from the second vector.
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template<uint32_t Shuffle> struct PermuteHelper<Shuffle, true, true, true, true>
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{
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static XMVECTOR XM_CALLCONV Permute(FXMVECTOR v1, FXMVECTOR v2){ (v1); return _mm_permute_ps(v2, Shuffle); }
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};
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// Fast path for permutes that read XY from the first vector, ZW from the second.
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template<uint32_t Shuffle> struct PermuteHelper<Shuffle, false, false, true, true>
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{
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static XMVECTOR XM_CALLCONV Permute(FXMVECTOR v1, FXMVECTOR v2) { return _mm_shuffle_ps(v1, v2, Shuffle); }
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};
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// Fast path for permutes that read XY from the second vector, ZW from the first.
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template<uint32_t Shuffle> struct PermuteHelper<Shuffle, true, true, false, false>
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{
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static XMVECTOR XM_CALLCONV Permute(FXMVECTOR v1, FXMVECTOR v2) { return _mm_shuffle_ps(v2, v1, Shuffle); }
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};
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};
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// General permute template
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template<uint32_t PermuteX, uint32_t PermuteY, uint32_t PermuteZ, uint32_t PermuteW>
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inline XMVECTOR XM_CALLCONV XMVectorPermute(FXMVECTOR V1, FXMVECTOR V2)
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{
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static_assert(PermuteX <= 7, "PermuteX template parameter out of range");
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static_assert(PermuteY <= 7, "PermuteY template parameter out of range");
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static_assert(PermuteZ <= 7, "PermuteZ template parameter out of range");
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static_assert(PermuteW <= 7, "PermuteW template parameter out of range");
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const uint32_t Shuffle = _MM_SHUFFLE(PermuteW & 3, PermuteZ & 3, PermuteY & 3, PermuteX & 3);
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const bool WhichX = PermuteX > 3;
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const bool WhichY = PermuteY > 3;
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const bool WhichZ = PermuteZ > 3;
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const bool WhichW = PermuteW > 3;
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return AVX::Internal::PermuteHelper<Shuffle, WhichX, WhichY, WhichZ, WhichW>::Permute(V1, V2);
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}
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// Special-case permute templates
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<0,1,2,3>(FXMVECTOR V1, FXMVECTOR) { return V1; }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<4,5,6,7>(FXMVECTOR, FXMVECTOR V2) { return V2; }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<4,1,2,3>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0x1); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<0,5,2,3>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0x2); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<4,5,2,3>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0x3); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<0,1,6,3>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0x4); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<4,1,6,3>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0x5); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<0,5,6,3>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0x6); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<4,5,6,3>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0x7); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<0,1,2,7>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0x8); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<4,1,2,7>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0x9); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<0,5,2,7>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0xA); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<4,5,2,7>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0xB); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<0,1,6,7>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0xC); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<4,1,6,7>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0xD); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorPermute<0,5,6,7>(FXMVECTOR V1, FXMVECTOR V2) { return _mm_blend_ps(V1,V2,0xE); }
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//-------------------------------------------------------------------------------------
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// Swizzle Templates
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//-------------------------------------------------------------------------------------
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// General swizzle template
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template<uint32_t SwizzleX, uint32_t SwizzleY, uint32_t SwizzleZ, uint32_t SwizzleW>
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inline XMVECTOR XM_CALLCONV XMVectorSwizzle(FXMVECTOR V)
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{
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static_assert(SwizzleX <= 3, "SwizzleX template parameter out of range");
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static_assert(SwizzleY <= 3, "SwizzleY template parameter out of range");
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static_assert(SwizzleZ <= 3, "SwizzleZ template parameter out of range");
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static_assert(SwizzleW <= 3, "SwizzleW template parameter out of range");
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return _mm_permute_ps( V, _MM_SHUFFLE( SwizzleW, SwizzleZ, SwizzleY, SwizzleX ) );
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}
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// Specialized swizzles
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template<> inline XMVECTOR XM_CALLCONV XMVectorSwizzle<0,1,2,3>(FXMVECTOR V) { return V; }
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template<> inline XMVECTOR XM_CALLCONV XMVectorSwizzle<0,0,2,2>(FXMVECTOR V) { return _mm_moveldup_ps(V); }
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template<> inline XMVECTOR XM_CALLCONV XMVectorSwizzle<1,1,3,3>(FXMVECTOR V) { return _mm_movehdup_ps(V); }
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//-------------------------------------------------------------------------------------
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// Other Templates
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//-------------------------------------------------------------------------------------
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template<uint32_t Elements>
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inline XMVECTOR XM_CALLCONV XMVectorShiftLeft(FXMVECTOR V1, FXMVECTOR V2)
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{
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static_assert( Elements < 4, "Elements template parameter out of range" );
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return AVX::XMVectorPermute<Elements, (Elements + 1), (Elements + 2), (Elements + 3)>(V1, V2);
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}
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template<uint32_t Elements>
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inline XMVECTOR XM_CALLCONV XMVectorRotateLeft(FXMVECTOR V)
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{
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static_assert( Elements < 4, "Elements template parameter out of range" );
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return AVX::XMVectorSwizzle<Elements & 3, (Elements + 1) & 3, (Elements + 2) & 3, (Elements + 3) & 3>(V);
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}
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template<uint32_t Elements>
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inline XMVECTOR XM_CALLCONV XMVectorRotateRight(FXMVECTOR V)
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{
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static_assert( Elements < 4, "Elements template parameter out of range" );
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return AVX::XMVectorSwizzle<(4 - Elements) & 3, (5 - Elements) & 3, (6 - Elements) & 3, (7 - Elements) & 3>(V);
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}
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} // namespace AVX
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} // namespace DirectX;
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