|
|
/////////////////////////////////////////////////////////////////////////////////// /// OpenGL Mathematics (glm.g-truc.net) /// /// Copyright (c) 2005 - 2013 G-Truc Creation (www.g-truc.net) /// 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. /// /// @ref core /// @file glm/core/intrinsic_geometric.inl /// @date 2009-05-08 / 2011-06-15 /// @author Christophe Riccio ///////////////////////////////////////////////////////////////////////////////////
namespace glm{ namespace detail{
//length GLM_FUNC_QUALIFIER __m128 sse_len_ps(__m128 x) { __m128 dot0 = sse_dot_ps(x, x); __m128 sqt0 = _mm_sqrt_ps(dot0); return sqt0; }
//distance GLM_FUNC_QUALIFIER __m128 sse_dst_ps(__m128 p0, __m128 p1) { __m128 sub0 = _mm_sub_ps(p0, p1); __m128 len0 = sse_len_ps(sub0); return len0; }
//dot GLM_FUNC_QUALIFIER __m128 sse_dot_ps(__m128 v1, __m128 v2) { # if((GLM_ARCH & GLM_ARCH_SSE4) == GLM_ARCH_SSE4) return _mm_dp_ps(v1, v2, 0xff); # else __m128 mul0 = _mm_mul_ps(v1, v2); __m128 swp0 = _mm_shuffle_ps(mul0, mul0, _MM_SHUFFLE(2, 3, 0, 1)); __m128 add0 = _mm_add_ps(mul0, swp0); __m128 swp1 = _mm_shuffle_ps(add0, add0, _MM_SHUFFLE(0, 1, 2, 3)); __m128 add1 = _mm_add_ps(add0, swp1); return add1; # endif }
// SSE1 GLM_FUNC_QUALIFIER __m128 sse_dot_ss(__m128 v1, __m128 v2) { __m128 mul0 = _mm_mul_ps(v1, v2); __m128 mov0 = _mm_movehl_ps(mul0, mul0); __m128 add0 = _mm_add_ps(mov0, mul0); __m128 swp1 = _mm_shuffle_ps(add0, add0, 1); __m128 add1 = _mm_add_ss(add0, swp1); return add1; }
//cross GLM_FUNC_QUALIFIER __m128 sse_xpd_ps(__m128 v1, __m128 v2) { __m128 swp0 = _mm_shuffle_ps(v1, v1, _MM_SHUFFLE(3, 0, 2, 1)); __m128 swp1 = _mm_shuffle_ps(v1, v1, _MM_SHUFFLE(3, 1, 0, 2)); __m128 swp2 = _mm_shuffle_ps(v2, v2, _MM_SHUFFLE(3, 0, 2, 1)); __m128 swp3 = _mm_shuffle_ps(v2, v2, _MM_SHUFFLE(3, 1, 0, 2)); __m128 mul0 = _mm_mul_ps(swp0, swp3); __m128 mul1 = _mm_mul_ps(swp1, swp2); __m128 sub0 = _mm_sub_ps(mul0, mul1); return sub0; }
//normalize GLM_FUNC_QUALIFIER __m128 sse_nrm_ps(__m128 v) { __m128 dot0 = sse_dot_ps(v, v); __m128 isr0 = _mm_rsqrt_ps(dot0); __m128 mul0 = _mm_mul_ps(v, isr0); return mul0; }
//faceforward GLM_FUNC_QUALIFIER __m128 sse_ffd_ps(__m128 N, __m128 I, __m128 Nref) { //__m128 dot0 = _mm_dot_ps(v, v); //__m128 neg0 = _mm_neg_ps(N); //__m128 sgn0 = _mm_sgn_ps(dot0); //__m128 mix0 = _mm_mix_ps(N, neg0, sgn0); //return mix0;
__m128 dot0 = sse_dot_ps(Nref, I); __m128 sgn0 = sse_sgn_ps(dot0); __m128 mul0 = _mm_mul_ps(sgn0, glm::detail::minus_one); __m128 mul1 = _mm_mul_ps(N, mul0); return mul1; }
//reflect GLM_FUNC_QUALIFIER __m128 sse_rfe_ps(__m128 I, __m128 N) { __m128 dot0 = sse_dot_ps(N, I); __m128 mul0 = _mm_mul_ps(N, dot0); __m128 mul1 = _mm_mul_ps(mul0, glm::detail::two); __m128 sub0 = _mm_sub_ps(I, mul1); return sub0; }
//refract GLM_FUNC_QUALIFIER __m128 sse_rfa_ps(__m128 I, __m128 N, __m128 eta) { __m128 dot0 = sse_dot_ps(N, I); __m128 mul0 = _mm_mul_ps(eta, eta); __m128 mul1 = _mm_mul_ps(dot0, dot0); __m128 sub0 = _mm_sub_ps(glm::detail::one, mul0); __m128 sub1 = _mm_sub_ps(glm::detail::one, mul1); __m128 mul2 = _mm_mul_ps(sub0, sub1); if(_mm_movemask_ps(_mm_cmplt_ss(mul2, glm::detail::zero)) == 0) return glm::detail::zero;
__m128 sqt0 = _mm_sqrt_ps(mul2); __m128 mul3 = _mm_mul_ps(eta, dot0); __m128 add0 = _mm_add_ps(mul3, sqt0); __m128 mul4 = _mm_mul_ps(add0, N); __m128 mul5 = _mm_mul_ps(eta, I); __m128 sub2 = _mm_sub_ps(mul5, mul4);
return sub2; }
}//namespace detail }//namespace glm
|