add sections about demos to README
update doxygen comments
/** * @file simd.h * @brief Abstraction of Intel SSE instruction set * * This file is part of Pyrit Ray Tracer. * * Copyright 2008 Radek Brich * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */#ifndef SIMD_H#define SIMD_H#include "common.h"#ifndef NO_SIMD#include <xmmintrin.h>#define mfloat4 __m128#define mZero _mm_setzero_ps()#define mOne _mm_set_ps1(1.0f)#define mTwo _mm_set_ps1(2.0f)#define mEps _mm_set_ps1(Eps)#define mMEps _mm_set_ps1(-Eps)#define mInf _mm_set_ps1(Inf)#define mMInf _mm_set_ps1(-Inf)#define mAllSet _mm_cmplt_ps(mZero, mOne)#define mset1 _mm_set_ps1#define mset _mm_set_ps#define madd _mm_add_ps#define msub _mm_sub_ps#define mmul _mm_mul_ps#define mdiv _mm_div_ps#define msqrt _mm_sqrt_ps#define mand _mm_and_ps#define mor _mm_or_ps#define mcmpgt _mm_cmpgt_ps#define mcmplt _mm_cmplt_ps#define mcmpge _mm_cmpge_ps#define mcmple _mm_cmple_ps#define mcmpeq _mm_cmpeq_ps#define mcmpneq _mm_cmpneq_ps#define mmin _mm_min_ps#define mmax _mm_max_ps#define mmovemask _mm_movemask_ps#define mShuffle0 _MM_SHUFFLE(0,0,0,0)#define mShuffle1 _MM_SHUFFLE(1,1,1,1)#define mShuffle2 _MM_SHUFFLE(2,2,2,2)#define mShuffle3 _MM_SHUFFLE(3,3,3,3)#define mshuffle _mm_shuffle_ps/** select values from a and b according to mask (a if mask is 1, b if mask is 0) */inline const mfloat4 mselect(const mfloat4& mask, const mfloat4& a, const mfloat4& b){ return _mm_or_ps(_mm_and_ps(mask, a), _mm_andnot_ps(mask, b));}/** fast power function */inline const mfloat4 mfastpow(const mfloat4& base, const mfloat4& exponent){ __m128 denom = _mm_mul_ps(exponent, base); denom = _mm_sub_ps(exponent, denom); denom = _mm_add_ps(base, denom); return _mm_mul_ps(base, _mm_rcp_ps(denom));}#endif#endif