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147 lines
4.7 KiB
C++
147 lines
4.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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/// OpenGL Mathematics (glm.g-truc.net)
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///
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/// Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net)
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/// Permission is hereby granted, free of charge, to any person obtaining a copy
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/// of this software and associated documentation files (the "Software"), to deal
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/// in the Software without restriction, including without limitation the rights
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/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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/// copies of the Software, and to permit persons to whom the Software is
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/// furnished to do so, subject to the following conditions:
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///
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/// The above copyright notice and this permission notice shall be included in
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/// all copies or substantial portions of the Software.
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///
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/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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/// THE SOFTWARE.
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///
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/// @ref core
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/// @file glm/core/intrinsic_geometric.inl
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/// @date 2009-05-08 / 2011-06-15
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/// @author Christophe Riccio
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///////////////////////////////////////////////////////////////////////////////////
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namespace glm{
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namespace detail{
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//length
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GLM_FUNC_QUALIFIER __m128 sse_len_ps(__m128 x)
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{
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__m128 dot0 = sse_dot_ps(x, x);
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__m128 sqt0 = _mm_sqrt_ps(dot0);
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return sqt0;
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}
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//distance
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GLM_FUNC_QUALIFIER __m128 sse_dst_ps(__m128 p0, __m128 p1)
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{
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__m128 sub0 = _mm_sub_ps(p0, p1);
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__m128 len0 = sse_len_ps(sub0);
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return len0;
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}
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//dot
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GLM_FUNC_QUALIFIER __m128 sse_dot_ps(__m128 v1, __m128 v2)
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{
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# if((GLM_ARCH & GLM_ARCH_AVX) == GLM_ARCH_AVX)
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return _mm_dp_ps(v1, v2, 0xff);
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# else
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__m128 mul0 = _mm_mul_ps(v1, v2);
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__m128 swp0 = _mm_shuffle_ps(mul0, mul0, _MM_SHUFFLE(2, 3, 0, 1));
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__m128 add0 = _mm_add_ps(mul0, swp0);
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__m128 swp1 = _mm_shuffle_ps(add0, add0, _MM_SHUFFLE(0, 1, 2, 3));
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__m128 add1 = _mm_add_ps(add0, swp1);
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return add1;
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# endif
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}
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// SSE1
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GLM_FUNC_QUALIFIER __m128 sse_dot_ss(__m128 v1, __m128 v2)
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{
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__m128 mul0 = _mm_mul_ps(v1, v2);
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__m128 mov0 = _mm_movehl_ps(mul0, mul0);
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__m128 add0 = _mm_add_ps(mov0, mul0);
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__m128 swp1 = _mm_shuffle_ps(add0, add0, 1);
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__m128 add1 = _mm_add_ss(add0, swp1);
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return add1;
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}
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//cross
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GLM_FUNC_QUALIFIER __m128 sse_xpd_ps(__m128 v1, __m128 v2)
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{
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__m128 swp0 = _mm_shuffle_ps(v1, v1, _MM_SHUFFLE(3, 0, 2, 1));
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__m128 swp1 = _mm_shuffle_ps(v1, v1, _MM_SHUFFLE(3, 1, 0, 2));
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__m128 swp2 = _mm_shuffle_ps(v2, v2, _MM_SHUFFLE(3, 0, 2, 1));
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__m128 swp3 = _mm_shuffle_ps(v2, v2, _MM_SHUFFLE(3, 1, 0, 2));
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__m128 mul0 = _mm_mul_ps(swp0, swp3);
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__m128 mul1 = _mm_mul_ps(swp1, swp2);
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__m128 sub0 = _mm_sub_ps(mul0, mul1);
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return sub0;
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}
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//normalize
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GLM_FUNC_QUALIFIER __m128 sse_nrm_ps(__m128 v)
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{
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__m128 dot0 = sse_dot_ps(v, v);
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__m128 isr0 = _mm_rsqrt_ps(dot0);
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__m128 mul0 = _mm_mul_ps(v, isr0);
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return mul0;
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}
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//faceforward
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GLM_FUNC_QUALIFIER __m128 sse_ffd_ps(__m128 N, __m128 I, __m128 Nref)
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{
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//__m128 dot0 = _mm_dot_ps(v, v);
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//__m128 neg0 = _mm_neg_ps(N);
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//__m128 sgn0 = _mm_sgn_ps(dot0);
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//__m128 mix0 = _mm_mix_ps(N, neg0, sgn0);
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//return mix0;
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__m128 dot0 = sse_dot_ps(Nref, I);
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__m128 sgn0 = sse_sgn_ps(dot0);
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__m128 mul0 = _mm_mul_ps(sgn0, glm::detail::minus_one);
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__m128 mul1 = _mm_mul_ps(N, mul0);
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return mul1;
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}
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//reflect
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GLM_FUNC_QUALIFIER __m128 sse_rfe_ps(__m128 I, __m128 N)
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{
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__m128 dot0 = sse_dot_ps(N, I);
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__m128 mul0 = _mm_mul_ps(N, dot0);
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__m128 mul1 = _mm_mul_ps(mul0, glm::detail::two);
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__m128 sub0 = _mm_sub_ps(I, mul1);
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return sub0;
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}
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//refract
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GLM_FUNC_QUALIFIER __m128 sse_rfa_ps(__m128 I, __m128 N, __m128 eta)
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{
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__m128 dot0 = sse_dot_ps(N, I);
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__m128 mul0 = _mm_mul_ps(eta, eta);
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__m128 mul1 = _mm_mul_ps(dot0, dot0);
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__m128 sub0 = _mm_sub_ps(glm::detail::one, mul0);
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__m128 sub1 = _mm_sub_ps(glm::detail::one, mul1);
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__m128 mul2 = _mm_mul_ps(sub0, sub1);
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if(_mm_movemask_ps(_mm_cmplt_ss(mul2, glm::detail::zero)) == 0)
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return glm::detail::zero;
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__m128 sqt0 = _mm_sqrt_ps(mul2);
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__m128 mul3 = _mm_mul_ps(eta, dot0);
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__m128 add0 = _mm_add_ps(mul3, sqt0);
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__m128 mul4 = _mm_mul_ps(add0, N);
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__m128 mul5 = _mm_mul_ps(eta, I);
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__m128 sub2 = _mm_sub_ps(mul5, mul4);
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return sub2;
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}
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}//namespace detail
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}//namespace glm
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