318 lines
14 KiB
C++
318 lines
14 KiB
C++
// Copyright 2009-2021 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "../sys/alloc.h"
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#include "math.h"
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#include "../simd/sse.h"
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namespace embree
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{
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////////////////////////////////////////////////////////////////////////////////
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/// SSE Vec2fa Type
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////////////////////////////////////////////////////////////////////////////////
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struct __aligned(16) Vec2fa
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{
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ALIGNED_STRUCT_(16);
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typedef float Scalar;
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enum { N = 2 };
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union {
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__m128 m128;
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struct { float x,y,az,aw; };
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};
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////////////////////////////////////////////////////////////////////////////////
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/// Constructors, Assignment & Cast Operators
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////////////////////////////////////////////////////////////////////////////////
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__forceinline Vec2fa( ) {}
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__forceinline Vec2fa( const __m128 a ) : m128(a) {}
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__forceinline Vec2fa ( const Vec2<float>& other ) { x = other.x; y = other.y; }
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__forceinline Vec2fa& operator =( const Vec2<float>& other ) { x = other.x; y = other.y; return *this; }
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__forceinline Vec2fa ( const Vec2fa& other ) { m128 = other.m128; }
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__forceinline Vec2fa& operator =( const Vec2fa& other ) { m128 = other.m128; return *this; }
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__forceinline explicit Vec2fa( const float a ) : m128(_mm_set1_ps(a)) {}
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__forceinline Vec2fa( const float x, const float y) : m128(_mm_set_ps(y, y, y, x)) {}
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__forceinline explicit Vec2fa( const __m128i a ) : m128(_mm_cvtepi32_ps(a)) {}
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__forceinline operator const __m128&() const { return m128; }
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__forceinline operator __m128&() { return m128; }
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////////////////////////////////////////////////////////////////////////////////
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/// Loads and Stores
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////////////////////////////////////////////////////////////////////////////////
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static __forceinline Vec2fa load( const void* const a ) {
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return Vec2fa(_mm_and_ps(_mm_load_ps((float*)a),_mm_castsi128_ps(_mm_set_epi32(0, 0, -1, -1))));
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}
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static __forceinline Vec2fa loadu( const void* const a ) {
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return Vec2fa(_mm_and_ps(_mm_loadu_ps((float*)a),_mm_castsi128_ps(_mm_set_epi32(0, 0, -1, -1))));
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}
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static __forceinline void storeu ( void* ptr, const Vec2fa& v ) {
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_mm_storeu_ps((float*)ptr,v);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// Constants
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////////////////////////////////////////////////////////////////////////////////
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__forceinline Vec2fa( ZeroTy ) : m128(_mm_setzero_ps()) {}
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__forceinline Vec2fa( OneTy ) : m128(_mm_set1_ps(1.0f)) {}
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__forceinline Vec2fa( PosInfTy ) : m128(_mm_set1_ps(pos_inf)) {}
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__forceinline Vec2fa( NegInfTy ) : m128(_mm_set1_ps(neg_inf)) {}
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////////////////////////////////////////////////////////////////////////////////
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/// Array Access
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////////////////////////////////////////////////////////////////////////////////
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__forceinline const float& operator []( const size_t index ) const { assert(index < 2); return (&x)[index]; }
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__forceinline float& operator []( const size_t index ) { assert(index < 2); return (&x)[index]; }
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};
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////////////////////////////////////////////////////////////////////////////////
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/// Unary Operators
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////////////////////////////////////////////////////////////////////////////////
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__forceinline Vec2fa operator +( const Vec2fa& a ) { return a; }
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__forceinline Vec2fa operator -( const Vec2fa& a ) {
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const __m128 mask = _mm_castsi128_ps(_mm_set1_epi32(0x80000000));
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return _mm_xor_ps(a.m128, mask);
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}
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__forceinline Vec2fa abs ( const Vec2fa& a ) {
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const __m128 mask = _mm_castsi128_ps(_mm_set1_epi32(0x7fffffff));
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return _mm_and_ps(a.m128, mask);
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}
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__forceinline Vec2fa sign ( const Vec2fa& a ) {
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return blendv_ps(Vec2fa(one), -Vec2fa(one), _mm_cmplt_ps (a,Vec2fa(zero)));
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}
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__forceinline Vec2fa rcp ( const Vec2fa& a )
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{
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#if defined(__aarch64__)
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__m128 reciprocal = _mm_rcp_ps(a.m128);
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reciprocal = vmulq_f32(vrecpsq_f32(a.m128, reciprocal), reciprocal);
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reciprocal = vmulq_f32(vrecpsq_f32(a.m128, reciprocal), reciprocal);
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return (const Vec2fa)reciprocal;
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#else
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#if defined(__AVX512VL__)
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const Vec2fa r = _mm_rcp14_ps(a.m128);
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#else
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const Vec2fa r = _mm_rcp_ps(a.m128);
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#endif
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#if defined(__AVX2__)
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const Vec2fa h_n = _mm_fnmadd_ps(a, r, vfloat4(1.0)); // First, compute 1 - a * r (which will be very close to 0)
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const Vec2fa res = _mm_fmadd_ps(r, h_n, r); // Then compute r + r * h_n
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#else
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const Vec2fa h_n = _mm_sub_ps(vfloat4(1.0f), _mm_mul_ps(a, r)); // First, compute 1 - a * r (which will be very close to 0)
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const Vec2fa res = _mm_add_ps(r,_mm_mul_ps(r, h_n)); // Then compute r + r * h_n
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#endif
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return res;
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#endif //defined(__aarch64__)
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}
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__forceinline Vec2fa sqrt ( const Vec2fa& a ) { return _mm_sqrt_ps(a.m128); }
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__forceinline Vec2fa sqr ( const Vec2fa& a ) { return _mm_mul_ps(a,a); }
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__forceinline Vec2fa rsqrt( const Vec2fa& a )
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{
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#if defined(__aarch64__)
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__m128 r = _mm_rsqrt_ps(a.m128);
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r = vmulq_f32(r, vrsqrtsq_f32(vmulq_f32(a.m128, r), r));
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r = vmulq_f32(r, vrsqrtsq_f32(vmulq_f32(a.m128, r), r));
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return r;
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#else
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#if defined(__AVX512VL__)
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__m128 r = _mm_rsqrt14_ps(a.m128);
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#else
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__m128 r = _mm_rsqrt_ps(a.m128);
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#endif
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return _mm_add_ps(_mm_mul_ps(_mm_set1_ps(1.5f),r), _mm_mul_ps(_mm_mul_ps(_mm_mul_ps(a, _mm_set1_ps(-0.5f)), r), _mm_mul_ps(r, r)));
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#endif
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}
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__forceinline Vec2fa zero_fix(const Vec2fa& a) {
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return blendv_ps(a, _mm_set1_ps(min_rcp_input), _mm_cmplt_ps (abs(a).m128, _mm_set1_ps(min_rcp_input)));
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}
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__forceinline Vec2fa rcp_safe(const Vec2fa& a) {
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return rcp(zero_fix(a));
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}
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__forceinline Vec2fa log ( const Vec2fa& a ) {
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return Vec2fa(logf(a.x),logf(a.y));
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}
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__forceinline Vec2fa exp ( const Vec2fa& a ) {
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return Vec2fa(expf(a.x),expf(a.y));
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}
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////////////////////////////////////////////////////////////////////////////////
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/// Binary Operators
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////////////////////////////////////////////////////////////////////////////////
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__forceinline Vec2fa operator +( const Vec2fa& a, const Vec2fa& b ) { return _mm_add_ps(a.m128, b.m128); }
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__forceinline Vec2fa operator -( const Vec2fa& a, const Vec2fa& b ) { return _mm_sub_ps(a.m128, b.m128); }
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__forceinline Vec2fa operator *( const Vec2fa& a, const Vec2fa& b ) { return _mm_mul_ps(a.m128, b.m128); }
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__forceinline Vec2fa operator *( const Vec2fa& a, const float b ) { return a * Vec2fa(b); }
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__forceinline Vec2fa operator *( const float a, const Vec2fa& b ) { return Vec2fa(a) * b; }
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__forceinline Vec2fa operator /( const Vec2fa& a, const Vec2fa& b ) { return _mm_div_ps(a.m128,b.m128); }
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__forceinline Vec2fa operator /( const Vec2fa& a, const float b ) { return _mm_div_ps(a.m128,_mm_set1_ps(b)); }
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__forceinline Vec2fa operator /( const float a, const Vec2fa& b ) { return _mm_div_ps(_mm_set1_ps(a),b.m128); }
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__forceinline Vec2fa min( const Vec2fa& a, const Vec2fa& b ) { return _mm_min_ps(a.m128,b.m128); }
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__forceinline Vec2fa max( const Vec2fa& a, const Vec2fa& b ) { return _mm_max_ps(a.m128,b.m128); }
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#if defined(__aarch64__) || defined(__SSE4_1__)
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__forceinline Vec2fa mini(const Vec2fa& a, const Vec2fa& b) {
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const vint4 ai = _mm_castps_si128(a);
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const vint4 bi = _mm_castps_si128(b);
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const vint4 ci = _mm_min_epi32(ai,bi);
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return _mm_castsi128_ps(ci);
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}
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#endif
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#if defined(__aarch64__) || defined(__SSE4_1__)
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__forceinline Vec2fa maxi(const Vec2fa& a, const Vec2fa& b) {
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const vint4 ai = _mm_castps_si128(a);
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const vint4 bi = _mm_castps_si128(b);
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const vint4 ci = _mm_max_epi32(ai,bi);
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return _mm_castsi128_ps(ci);
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}
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#endif
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__forceinline Vec2fa pow ( const Vec2fa& a, const float& b ) {
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return Vec2fa(powf(a.x,b),powf(a.y,b));
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}
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////////////////////////////////////////////////////////////////////////////////
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/// Ternary Operators
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////////////////////////////////////////////////////////////////////////////////
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#if defined(__AVX2__)
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__forceinline Vec2fa madd ( const Vec2fa& a, const Vec2fa& b, const Vec2fa& c) { return _mm_fmadd_ps(a,b,c); }
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__forceinline Vec2fa msub ( const Vec2fa& a, const Vec2fa& b, const Vec2fa& c) { return _mm_fmsub_ps(a,b,c); }
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__forceinline Vec2fa nmadd ( const Vec2fa& a, const Vec2fa& b, const Vec2fa& c) { return _mm_fnmadd_ps(a,b,c); }
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__forceinline Vec2fa nmsub ( const Vec2fa& a, const Vec2fa& b, const Vec2fa& c) { return _mm_fnmsub_ps(a,b,c); }
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#else
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__forceinline Vec2fa madd ( const Vec2fa& a, const Vec2fa& b, const Vec2fa& c) { return a*b+c; }
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__forceinline Vec2fa msub ( const Vec2fa& a, const Vec2fa& b, const Vec2fa& c) { return a*b-c; }
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__forceinline Vec2fa nmadd ( const Vec2fa& a, const Vec2fa& b, const Vec2fa& c) { return -a*b+c;}
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__forceinline Vec2fa nmsub ( const Vec2fa& a, const Vec2fa& b, const Vec2fa& c) { return -a*b-c; }
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#endif
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__forceinline Vec2fa madd ( const float a, const Vec2fa& b, const Vec2fa& c) { return madd(Vec2fa(a),b,c); }
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__forceinline Vec2fa msub ( const float a, const Vec2fa& b, const Vec2fa& c) { return msub(Vec2fa(a),b,c); }
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__forceinline Vec2fa nmadd ( const float a, const Vec2fa& b, const Vec2fa& c) { return nmadd(Vec2fa(a),b,c); }
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__forceinline Vec2fa nmsub ( const float a, const Vec2fa& b, const Vec2fa& c) { return nmsub(Vec2fa(a),b,c); }
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////////////////////////////////////////////////////////////////////////////////
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/// Assignment Operators
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////////////////////////////////////////////////////////////////////////////////
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__forceinline Vec2fa& operator +=( Vec2fa& a, const Vec2fa& b ) { return a = a + b; }
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__forceinline Vec2fa& operator -=( Vec2fa& a, const Vec2fa& b ) { return a = a - b; }
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__forceinline Vec2fa& operator *=( Vec2fa& a, const Vec2fa& b ) { return a = a * b; }
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__forceinline Vec2fa& operator *=( Vec2fa& a, const float b ) { return a = a * b; }
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__forceinline Vec2fa& operator /=( Vec2fa& a, const Vec2fa& b ) { return a = a / b; }
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__forceinline Vec2fa& operator /=( Vec2fa& a, const float b ) { return a = a / b; }
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////////////////////////////////////////////////////////////////////////////////
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/// Reductions
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////////////////////////////////////////////////////////////////////////////////
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__forceinline float reduce_add(const Vec2fa& v) { return v.x+v.y; }
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__forceinline float reduce_mul(const Vec2fa& v) { return v.x*v.y; }
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__forceinline float reduce_min(const Vec2fa& v) { return min(v.x,v.y); }
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__forceinline float reduce_max(const Vec2fa& v) { return max(v.x,v.y); }
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////////////////////////////////////////////////////////////////////////////////
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/// Comparison Operators
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////////////////////////////////////////////////////////////////////////////////
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__forceinline bool operator ==( const Vec2fa& a, const Vec2fa& b ) { return (_mm_movemask_ps(_mm_cmpeq_ps (a.m128, b.m128)) & 3) == 3; }
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__forceinline bool operator !=( const Vec2fa& a, const Vec2fa& b ) { return (_mm_movemask_ps(_mm_cmpneq_ps(a.m128, b.m128)) & 3) != 0; }
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////////////////////////////////////////////////////////////////////////////////
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/// Euclidean Space Operators
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////////////////////////////////////////////////////////////////////////////////
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#if defined(__SSE4_1__)
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__forceinline float dot ( const Vec2fa& a, const Vec2fa& b ) {
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return _mm_cvtss_f32(_mm_dp_ps(a,b,0x3F));
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}
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#else
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__forceinline float dot ( const Vec2fa& a, const Vec2fa& b ) {
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return reduce_add(a*b);
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}
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#endif
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__forceinline Vec2fa cross ( const Vec2fa& a ) {
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return Vec2fa(-a.y,a.x);
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}
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__forceinline float sqr_length ( const Vec2fa& a ) { return dot(a,a); }
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__forceinline float rcp_length ( const Vec2fa& a ) { return rsqrt(dot(a,a)); }
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__forceinline float rcp_length2( const Vec2fa& a ) { return rcp(dot(a,a)); }
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__forceinline float length ( const Vec2fa& a ) { return sqrt(dot(a,a)); }
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__forceinline Vec2fa normalize( const Vec2fa& a ) { return a*rsqrt(dot(a,a)); }
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__forceinline float distance ( const Vec2fa& a, const Vec2fa& b ) { return length(a-b); }
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////////////////////////////////////////////////////////////////////////////////
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/// Select
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////////////////////////////////////////////////////////////////////////////////
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__forceinline Vec2fa select( bool s, const Vec2fa& t, const Vec2fa& f ) {
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__m128 mask = s ? _mm_castsi128_ps(_mm_cmpeq_epi32(_mm_setzero_si128(), _mm_setzero_si128())) : _mm_setzero_ps();
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return blendv_ps(f, t, mask);
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}
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__forceinline Vec2fa lerp(const Vec2fa& v0, const Vec2fa& v1, const float t) {
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return madd(1.0f-t,v0,t*v1);
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}
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__forceinline int maxDim ( const Vec2fa& a )
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{
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const Vec2fa b = abs(a);
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if (b.x > b.y) return 0;
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else return 1;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// Rounding Functions
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////////////////////////////////////////////////////////////////////////////////
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#if defined(__aarch64__)
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//__forceinline Vec2fa trunc(const Vec2fa& a) { return vrndq_f32(a); }
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__forceinline Vec2fa floor(const Vec2fa& a) { return vrndmq_f32(a); }
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__forceinline Vec2fa ceil (const Vec2fa& a) { return vrndpq_f32(a); }
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#elif defined (__SSE4_1__)
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//__forceinline Vec2fa trunc( const Vec2fa& a ) { return _mm_round_ps(a, _MM_FROUND_TO_NEAREST_INT); }
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__forceinline Vec2fa floor( const Vec2fa& a ) { return _mm_round_ps(a, _MM_FROUND_TO_NEG_INF ); }
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__forceinline Vec2fa ceil ( const Vec2fa& a ) { return _mm_round_ps(a, _MM_FROUND_TO_POS_INF ); }
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#else
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//__forceinline Vec2fa trunc( const Vec2fa& a ) { return Vec2fa(truncf(a.x),truncf(a.y),truncf(a.z)); }
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__forceinline Vec2fa floor( const Vec2fa& a ) { return Vec2fa(floorf(a.x),floorf(a.y)); }
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__forceinline Vec2fa ceil ( const Vec2fa& a ) { return Vec2fa(ceilf (a.x),ceilf (a.y)); }
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#endif
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////////////////////////////////////////////////////////////////////////////////
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/// Output Operators
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////////////////////////////////////////////////////////////////////////////////
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__forceinline embree_ostream operator<<(embree_ostream cout, const Vec2fa& a) {
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return cout << "(" << a.x << ", " << a.y << ")";
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}
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typedef Vec2fa Vec2fa_t;
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}
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