240 lines
8.5 KiB
C++
240 lines
8.5 KiB
C++
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// Copyright 2009-2020 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "../sys/platform.h"
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#include <limits>
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#define _USE_MATH_DEFINES
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#include <math.h> // using cmath causes issues under Windows
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#include <cfloat>
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#include <climits>
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// Math constants may not be defined in libcxx + mingw + strict C++ standard
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#if defined(__MINGW32__)
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// TODO(LTE): use constexpr
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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#ifndef M_1_PI
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#define M_1_PI 0.31830988618379067154
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#endif
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#endif // __MINGW32__
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namespace embree
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{
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static MAYBE_UNUSED const float one_over_255 = 1.0f/255.0f;
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static MAYBE_UNUSED const float min_rcp_input = 1E-18f; // for abs(x) >= min_rcp_input the newton raphson rcp calculation does not fail
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/* we consider floating point numbers in that range as valid input numbers */
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static MAYBE_UNUSED float FLT_LARGE = 1.844E18f;
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struct TrueTy {
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__forceinline operator bool( ) const { return true; }
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};
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extern MAYBE_UNUSED TrueTy True;
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struct FalseTy {
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__forceinline operator bool( ) const { return false; }
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};
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extern MAYBE_UNUSED FalseTy False;
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struct ZeroTy
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{
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__forceinline operator double ( ) const { return 0; }
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__forceinline operator float ( ) const { return 0; }
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__forceinline operator long long( ) const { return 0; }
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__forceinline operator unsigned long long( ) const { return 0; }
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__forceinline operator long ( ) const { return 0; }
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__forceinline operator unsigned long ( ) const { return 0; }
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__forceinline operator int ( ) const { return 0; }
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__forceinline operator unsigned int ( ) const { return 0; }
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__forceinline operator short ( ) const { return 0; }
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__forceinline operator unsigned short ( ) const { return 0; }
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__forceinline operator int8_t ( ) const { return 0; }
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__forceinline operator uint8_t ( ) const { return 0; }
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};
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extern MAYBE_UNUSED ZeroTy zero;
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struct OneTy
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{
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__forceinline operator double ( ) const { return 1; }
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__forceinline operator float ( ) const { return 1; }
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__forceinline operator long long( ) const { return 1; }
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__forceinline operator unsigned long long( ) const { return 1; }
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__forceinline operator long ( ) const { return 1; }
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__forceinline operator unsigned long ( ) const { return 1; }
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__forceinline operator int ( ) const { return 1; }
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__forceinline operator unsigned int ( ) const { return 1; }
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__forceinline operator short ( ) const { return 1; }
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__forceinline operator unsigned short ( ) const { return 1; }
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__forceinline operator int8_t ( ) const { return 1; }
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__forceinline operator uint8_t ( ) const { return 1; }
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};
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extern MAYBE_UNUSED OneTy one;
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struct NegInfTy
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{
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__forceinline operator double ( ) const { return -std::numeric_limits<double>::infinity(); }
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__forceinline operator float ( ) const { return -std::numeric_limits<float>::infinity(); }
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__forceinline operator long long( ) const { return std::numeric_limits<long long>::min(); }
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__forceinline operator unsigned long long( ) const { return std::numeric_limits<unsigned long long>::min(); }
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__forceinline operator long ( ) const { return std::numeric_limits<long>::min(); }
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__forceinline operator unsigned long ( ) const { return std::numeric_limits<unsigned long>::min(); }
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__forceinline operator int ( ) const { return std::numeric_limits<int>::min(); }
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__forceinline operator unsigned int ( ) const { return std::numeric_limits<unsigned int>::min(); }
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__forceinline operator short ( ) const { return std::numeric_limits<short>::min(); }
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__forceinline operator unsigned short ( ) const { return std::numeric_limits<unsigned short>::min(); }
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__forceinline operator int8_t ( ) const { return std::numeric_limits<int8_t>::min(); }
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__forceinline operator uint8_t ( ) const { return std::numeric_limits<uint8_t>::min(); }
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};
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extern MAYBE_UNUSED NegInfTy neg_inf;
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struct PosInfTy
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{
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__forceinline operator double ( ) const { return std::numeric_limits<double>::infinity(); }
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__forceinline operator float ( ) const { return std::numeric_limits<float>::infinity(); }
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__forceinline operator long long( ) const { return std::numeric_limits<long long>::max(); }
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__forceinline operator unsigned long long( ) const { return std::numeric_limits<unsigned long long>::max(); }
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__forceinline operator long ( ) const { return std::numeric_limits<long>::max(); }
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__forceinline operator unsigned long ( ) const { return std::numeric_limits<unsigned long>::max(); }
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__forceinline operator int ( ) const { return std::numeric_limits<int>::max(); }
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__forceinline operator unsigned int ( ) const { return std::numeric_limits<unsigned int>::max(); }
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__forceinline operator short ( ) const { return std::numeric_limits<short>::max(); }
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__forceinline operator unsigned short ( ) const { return std::numeric_limits<unsigned short>::max(); }
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__forceinline operator int8_t ( ) const { return std::numeric_limits<int8_t>::max(); }
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__forceinline operator uint8_t ( ) const { return std::numeric_limits<uint8_t>::max(); }
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};
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extern MAYBE_UNUSED PosInfTy inf;
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extern MAYBE_UNUSED PosInfTy pos_inf;
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struct NaNTy
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{
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__forceinline operator double( ) const { return std::numeric_limits<double>::quiet_NaN(); }
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__forceinline operator float ( ) const { return std::numeric_limits<float>::quiet_NaN(); }
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};
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extern MAYBE_UNUSED NaNTy nan;
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struct UlpTy
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{
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__forceinline operator double( ) const { return std::numeric_limits<double>::epsilon(); }
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__forceinline operator float ( ) const { return std::numeric_limits<float>::epsilon(); }
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};
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extern MAYBE_UNUSED UlpTy ulp;
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struct PiTy
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{
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__forceinline operator double( ) const { return double(M_PI); }
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__forceinline operator float ( ) const { return float(M_PI); }
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};
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extern MAYBE_UNUSED PiTy pi;
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struct OneOverPiTy
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{
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__forceinline operator double( ) const { return double(M_1_PI); }
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__forceinline operator float ( ) const { return float(M_1_PI); }
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};
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extern MAYBE_UNUSED OneOverPiTy one_over_pi;
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struct TwoPiTy
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{
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__forceinline operator double( ) const { return double(2.0*M_PI); }
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__forceinline operator float ( ) const { return float(2.0*M_PI); }
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};
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extern MAYBE_UNUSED TwoPiTy two_pi;
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struct OneOverTwoPiTy
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{
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__forceinline operator double( ) const { return double(0.5*M_1_PI); }
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__forceinline operator float ( ) const { return float(0.5*M_1_PI); }
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};
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extern MAYBE_UNUSED OneOverTwoPiTy one_over_two_pi;
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struct FourPiTy
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{
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__forceinline operator double( ) const { return double(4.0*M_PI); }
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__forceinline operator float ( ) const { return float(4.0*M_PI); }
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};
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extern MAYBE_UNUSED FourPiTy four_pi;
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struct OneOverFourPiTy
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{
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__forceinline operator double( ) const { return double(0.25*M_1_PI); }
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__forceinline operator float ( ) const { return float(0.25*M_1_PI); }
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};
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extern MAYBE_UNUSED OneOverFourPiTy one_over_four_pi;
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struct StepTy {
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};
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extern MAYBE_UNUSED StepTy step;
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struct ReverseStepTy {
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};
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extern MAYBE_UNUSED ReverseStepTy reverse_step;
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struct EmptyTy {
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};
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extern MAYBE_UNUSED EmptyTy empty;
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struct FullTy {
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};
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extern MAYBE_UNUSED FullTy full;
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struct UndefinedTy {
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};
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extern MAYBE_UNUSED UndefinedTy undefined;
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#if defined(__aarch64__)
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extern const uint32x4_t movemask_mask;
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extern const uint32x4_t vzero;
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extern const uint32x4_t v0x80000000;
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extern const uint32x4_t v0x7fffffff;
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extern const uint32x4_t v000F;
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extern const uint32x4_t v00F0;
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extern const uint32x4_t v00FF;
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extern const uint32x4_t v0F00;
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extern const uint32x4_t v0F0F;
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extern const uint32x4_t v0FF0;
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extern const uint32x4_t v0FFF;
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extern const uint32x4_t vF000;
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extern const uint32x4_t vF00F;
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extern const uint32x4_t vF0F0;
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extern const uint32x4_t vF0FF;
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extern const uint32x4_t vFF00;
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extern const uint32x4_t vFF0F;
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extern const uint32x4_t vFFF0;
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extern const uint32x4_t vFFFF;
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extern const uint8x16_t v0022;
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extern const uint8x16_t v1133;
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extern const uint8x16_t v0101;
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extern const float32x4_t vOne;
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extern const float32x4_t vmOne;
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extern const float32x4_t vInf;
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extern const float32x4_t vmInf;
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#endif
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}
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